Not Applicable
Not Applicable
Not Applicable
1. Field of Invention
This invention relates to the power hydrostatic and electric transmissions association, specifically to a system of internal combustion engine, pump with hydraulic motor and power electric units combination, which are used for high efficiency automotive driving.
2. Background of the Invention
The widespread hydrostatic transmission is used to drive wheels and working equipment of widely known machinery—mountainous, construction, agricultural, transportation automotive and other heavy equipment. Also widely know hybrid cars with engine and power electric units combination.
System engine-pump are known to consist basically of familiar, expected and obvious structural configurations, notwithstanding the myriad of designs encompassed by the crowded prior art which have been developed for the fulfillment of countless objectives and requirements.
By way of example, U.S. Pat. No. 5,261,797 to Christenson (1993), U.S. Pat. No. 5,556,262 to Achten et al. (1996), U.S. Pat. No. 5,616,010 to Sawyer (1997), U.S. Pat. No. 6,293,231 to Valentin (2001), U.S. Pat. No. 7,011,051 to the same inventor Epshteyn (2006), U.S. patent application “Universal hybrid engine, compressor and pump and method of operation” Ser. No. 11/110,109 (filing date Apr. 20, 2005) to the same inventor Epshteyn and U.S. patent application “Monocylindrical hybrid two-cycle engine, compressor and pump, and method of operation” Ser. No. 11/373,793 (filing date Mar. 10, 2006) to the same inventor Epshteyn.
While these devices fulfill their respective, particular objective and requirements, the aforementioned patents do not describe the monocylindrical hybrid powertrain and method of operation for providing compact design, increased efficiency and specific power while minimizing the fuel consumption.
The modern hydrostatic transmission has the following disadvantages:
Therefore, it can be appreciated that there exists a continuing need for a new and improved monocylindrical hybrid powertrain providing joint operation of the progressive hydrostatic transmission and electric transmission having better specific data than widespread automotive engine and automatic transmission.
The present invention substantially fulfills these needs.
The objectives and advantages of the present invention are:
In accordance with the present invention the monocylindrical hybrid powertrain, further hybrid, comprises two-cycle engine, compressor, pump with rotor, hydrostatic motor associated with electric motor, synchronize mechanism with a pivotable swash plate, swash plate turn and shift mechanisms, conic reducer, swash plate turn hydraulic system, swash plate shift hydraulic system, hydraulic system and replenishing system.
The two-cycle engine is comprised of a cylinder with cooling system, piston with rings, cylinder head with combustion chamber, camshaft, air injection valve, exhaust valve and exhaust manifold. The engine piston located between the compressor chamber and combustion chamber.
The compressor is comprised of a piston with rings and the compressor chamber located within the engine cylinder between the engine and compressor pistons. The compressor piston fastened to a hub. The compressor is comprised of an intake and output valves located on the side surface of engine cylinder. The output valve is coupled with the air injection valve of the engine by a receiver, which is comprised of a water jacket and is located on the side surface of engine cylinder. The compressor intake valve is connected with the one lobe by means of rod and pivotably mounted rocker. The compressor output valve is connected with the second lobe and both lobes fastened to pump's rotor.
The pump housing is the engine cylinder and joined to a valve plate. A pump's rotor is comprised stabilizer motor pistons and plunger fastened to the engine piston. The plunger, rotor, compressor piston and hub located coaxially. The rotor is coupled with the engine cylinder by a bearing with a disc spring. The valve plate one said is comprised a pump inlet and outlet slots, associated with the pump chamber canal and comprised stabilizer motor's inlet and outlet slots. The valve plate opposite said fastened to the spin-valve and associated with the spin-valve disc by the circular slot, two autonomous slots, bearing and spring. The spin-valve axis, rotor axis and replenishing system pump shaft axis located on one center line. Within the valve plate mounted a bearings and intermediate shaft connected the rotor, spin-valve and replenishing pump shaft.
The synchronize mechanism comprises two axial rods, compensate pistons and lever. Axial rods coupled with compensate pistons inside of the rotor, coupled with the swash plate by shoes outside of the rotor and located diametrically opposite within rotor. Compensate pistons having smaller diameter than axial rods diameter and formed differential pistons within pump chamber. A compensate piston ends located within said rotor autonomous chambers and fluidly connected with an axial canal located diametrically opposite to the pump chamber canal and both canals associated with a valve plate inlet and outlet slots of said pump.
The first axial rod pivotably and directly coupled to the lever, connected to the pump plunger by the assembled crossbar. The lever pivotably coupled with the rotor by sliders and axle and pivotably coupled with a crossbar by sliders. The second axial rod coupled directly to the sliding holder which pivotably coupled with compressor piston's hub inside of the rotor.
The conic reducer's first gearwheel is fastened to the rotor and the second gearwheel mounted on one shaft with a first sprocket wheel associated by means of chain with a second sprocket wheel fastened to said engine camshaft, which on opposite side of the engine comprises a pulley associated with an accessory units by means of the belt. The second conic gearwheel, shaft with bearings, first sprocket wheel and housing formed modular assembly fastened to the engine cylinder. The accessory regular units (not illustrated)—cooling system pump, electric system generator, steering pump, associated with the belt.
The swash plate associated with the pump's valve plate by swash plate turn mechanism and swash plate shift mechanism.
The swash plate turn mechanism is comprised servo cylinder with piston. The swash plate pin pivotably coupled with servo cylinder piston by rod. The servo cylinder fastened to the valve plate.
The swash plate shift mechanism is comprised of a servo cylinder with piston and lever. The swash plate pivotably coupled with servo cylinder piston by lever and hinge pin. The servo cylinder fastened to the valve plate and the lever pivotably coupled with the bracket fastened to the valve plate.
The swash plate turn hydraulic system is comprised of a hydraulic distributor with solenoids. A first and second lines of the distributor is connected with the servo cylinder, third line is coupled with the pneumohydraulic accumulator and the fourth line of the distributor is coupled with the tank.
The swash plate shift hydraulic system comprised of a hydraulic distributor with solenoids. A first and second lines of the distributor is connected with the servo cylinder, third line is coupled with the pneumohydraulic accumulator and the fourth line of the distributor is coupled with the tank.
The hydrostatic motor associated with at least one electric motor and the hydrostatic motor shaft and the electric motor's shaft located on one axis and coupled with one gear respectively by first and second clutches.
The hydraulic system of hybrid is comprised of a first and second hydraulic distributors with solenoids. The four-way first hydraulic distributor has a first line connected in parallel to pump outlet and the hydrostatic motor inlet by check valve, a second line coupled with the pump inlet, a third line coupled in parallel with the replenishing pump outlet and stabilizer motor outlet and fourth line coupled with the pneumohydraulic accumulator.
The three-way second hydraulic distributor has a first line connected to the stabilizer motor inlet, second line coupled with the spin-valve circular slot and third line connected to the pneumohydraulic accumulator.
The spin-valve one autonomous slot coupled with the pneumohydraulic accumulator and second autonomous slot coupled with the replenishing pump outlet.
The replenishing system comprises the replenishing pump connected in parallel to an accumulator and relief valve.
There has thus been outlined, rather broadly, some features of the invention in order that the detailed description thereof that follows may be better appreciated. There are, of course, additional features of the invention that will be described hereinafter and which will form the subject matter of the claims appended hereto.
In this respect, before explaining at least one embodiment of the invention in detail, it is to be understood that the invention is not limited in its application to the details of construction and to the arrangements of the components set forth in the following description illustrated in the drawings. The invention is capable of other embodiments and of being practiced and carried out in various ways. Also, it is to be understood that the Patent phraseology and terminology employed herein are for the purpose of description and should not be regarded is limiting.
As such, those skilled in the art will appreciate that the conception, upon which this disclosure is based, may readily be utilized as a basis for the designing of other structures, methods and system for carrying out the several purposes of the present invention. It is important, therefore, that the claims be regarded as including such equivalent constructions insofar as they do not depart from the spirit and scope of the present invention.
It is therefore an object of the present invention to provide a new and improved hybrid, which has all the advantages of the prior art systems engine, pump and hydrostatic motor and none of the disadvantages.
It is another object of the present invention to provide a new and improved hybrid, which may be easy and efficiency manufactured and low price marketed.
It is an object of the present invention to provide decrease in weight and installation space of the hydrostatic transmission
It is a further object of the present invention is to provide a less operation cost of the hybrid.
An even further object of the present invention is to provide regular accessory systems for the engine and hydrostatic transmission, which will reduce the price.
Lastly it is an object of the present invention to provide a new and improved hybrid for increasing the efficiency and specific power, while minimizing the installation space and fuel consumption necessary in particular for an automobile.
In accordance with the present invention the monocylindrical hybrid powertrain, further hybrid, comprises two-cycle engine, compressor, pump with rotor, hydrostatic motor associated with electric motor, synchronize mechanism with a pivotable swash plate, swash plate turn and shift mechanisms, conic reducer, swash plate turn hydraulic system, swash plate shift hydraulic system, hydraulic system and replenishing system.
The two-cycle engine is comprised of a cylinder with cooling system, piston with rings, cylinder head with combustion chamber, camshaft, air injection valve, exhaust valve and exhaust manifold. The engine piston located between the compressor chamber and combustion chamber.
The compressor is comprised of a piston with rings and the compressor chamber located within the engine cylinder between the engine and compressor pistons. The compressor piston fastened to a hub. The compressor is comprised of an intake and output valves with, which are located on the side surface of engine cylinder. The output valve is coupled with the air injection valve of the engine by a receiver, which is comprised of a water jacket and is located on the side surface of engine cylinder. The compressor intake valve is connected with the one lobe by means of rod and pivotably mounted rocker. The compressor output valve is connected with the second lobe and both lobes fastened to pump's rotor.
The pump housing is the engine cylinder and joined to a valve plate. A pump's rotor is comprised stabilizer motor pistons and plunger fastened to the engine piston. The plunger, rotor, compressor piston and hub located coaxially. The rotor is coupled with the engine cylinder by a bearing with a disc spring. The valve plate one said is comprised a pump inlet and outlet slots, associated with the pump chamber canal and comprised stabilizer motor's inlet and outlet slots. The valve plate opposite said fastened to the spin-valve and associated with the spin-valve disc by the circular slot, two autonomous slots, bearing and spring. The spin-valve axis, rotor axis and charging system pump shaft axis located on one center line. Within the valve plate mounted a bearings and intermediate shaft connected the rotor, spin-valve and replenishing pump shaft.
The synchronize mechanism comprises a two axial rods, compensate pistons and lever. Axial rods coupled with compensate pistons inside of the rotor, coupled with the swash plate by shoes outside of the rotor and located diametrically opposite within rotor. Compensate pistons having smaller diameter than axial rods diameter and formed differential pistons within pump chamber. A compensate piston ends located within said rotor autonomous chambers and fluidly connected with an axial canal located diametrically opposite to the pump chamber canal and both canals associated with a valve plate inlet and outlet slots of said pump.
The first axial rod pivotably and directly coupled to the lever, connected to the pump plunger by the assembled crossbar. The lever pivotably coupled with the rotor by sliders and axle and pivotably coupled with a crossbar by sliders. The second axial rod coupled directly to the sliding holder which pivotably coupled with compressor piston's hub inside of the rotor.
The conic reducer's first gearwheel is fastened to the rotor and the second gearwheel mounted on one shaft with a first sprocket wheel associated by means of chain with a second sprocket wheel fastened to said engine camshaft, which on opposite side of the engine comprises a pulley associated with an accessory units by means of the belt. The second conic gearwheel, shaft with bearings, first sprocket wheel and housing formed modular assembly fastened to the engine cylinder. The accessory regular units (not illustrated)—cooling system pump, electric system generator, steering pump, associated with the belt.
The swash plate associated with the pump's valve plate by swash plate turn mechanism and swash plate shift mechanism.
The swash plate turn mechanism is comprised servo cylinder with piston. The swash plate pin pivotably coupled with servo cylinder piston by rod. The servo cylinder fastened to the valve plate.
The swash plate shift mechanism is comprised of a servo cylinder with piston and lever. The swash plate pivotably coupled with servo cylinder piston by lever and hinge pin. The servo cylinder fastened to the valve plate and the lever pivotably coupled with the bracket fastened to the valve plate.
The swash plate turn hydraulic system is comprised of a hydraulic distributor with solenoids. A first and second lines of the distributor is connected with the servo cylinder, third line is coupled with the pneumohydraulic accumulator and the fourth line of the distributor is coupled with the tank.
The swash plate shift hydraulic system comprised of a hydraulic distributor with solenoids. A first and second lines of the distributor is connected with the servo cylinder, third line is coupled with the pneumohydraulic accumulator and the fourth line of the distributor is coupled with the tank.
The hydrostatic motor associated with at least one electric motor and the hydrostatic motor shaft and the electric motor's shaft located on one axis and coupled with one gear respectively by first and second clutches.
The hydraulic system of hybrid is comprised of a first and second hydraulic distributors with solenoids. The four-way first hydraulic distributor has a first line connected in parallel to pump outlet and the hydrostatic motor inlet by check valve, a second line coupled with the pump inlet, a third line coupled in parallel with the replenishing pump outlet and stabilizer motor outlet and fourth line coupled with the pneumohydraulic accumulator.
The three-way second hydraulic distributor has a first line connected to the stabilizer motor inlet, second line coupled with the spin-valve circular slot and third line connected to the pneumohydraulic accumulator.
The spin-valve one autonomous slot coupled with the pneumohydraulic accumulator and second autonomous slot coupled with the replenishing pump outlet.
The replenishing system comprises the replenishing pump connected in parallel to an accumulator and relief valve.
The same reference numerals refer to the same parts through the various figures.
Arrows located on hydraulic lines (
Arrows located on
With reference now to the drawings, and in particular, to
Specifically, it will be noted in the various Figures that the device relates to a hybrid for providing increased efficiency and specific power while minimizing the weight, and fuel consumption, necessary in particular for automobile hydrostatic transmission.
In accordance with the present invention the monocylindrical hybrid powertrain, further hybrid, comprises two-cycle engine, compressor, pump with rotor, hydrostatic motor associated with electric motor, synchronize mechanism with a pivotable swash plate, swash plate turn and shift mechanisms, conic reducer, swash plate turn hydraulic system, swash plate shift hydraulic system, hydraulic system and replenishing system.
The hybrid 32 (
The two-cycle engine is comprised of a cylinder 84 (
The compressor is comprised of a piston 116 (
The pump housing is the engine cylinder and joined to a valve plate 152 (
The synchronize mechanism comprises a two axial rods 206, 208 (
The first axial rod pivotably and directly coupled to the lever 216, connected to the pump plunger by the assembled crossbar 236. The lever pivotably coupled with the rotor by sliders 238 (
The conic reducer's first gearwheel 256 (
The swash plate associated with the pump's valve plate by swash plate turn mechanism and swash plate shift mechanism.
The swash plate 52 (
The swash plate 52 (
The swash plate turn hydraulic system 62 (
The swash plate shift hydraulic system 64 (
The hydrostatic motor 44 (
The hydraulic system of hybrid is comprised of a first hydraulic distributor 358 (
The three-way second hydraulic distributor has a first line 388 (
The spin-valve 178 one autonomous slot 186 (
The starter pump 402 by means of the pedal 404 provides an opportunity to increase the pneumohydraulic accumulator fluid pressure with muscle efforts in the emergency case.
With respect to the above description then, it is to be realized that the optimum dimensional relationships for the parts of the invention, to include variations in size, materials, shape, form, function and the manner of operation, assembly and use, are deemed readily apparent and obvious to one skilled in the art, and all equivalent relationships to those illustrated in the drawings and described in the specification are intended to be encompassed by the present invention.
Therefore, the foregoing is considered as illustrative only of the principles of the invention. Further, since numerous modification and changes will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction and operation shown and described, and accordingly, all suitable modification and equivalents may be resorted to, falling within the scope of the invention.
The hybrid has starting, restarting, idling, work mode of operation and pneumohydraulic accumulator (PHA) charging by means of engine power operation and by muscle efforts. Also the hybrid provides by means of the stand-by energy and the hydrostatic motor and electric motor association automotive start acceleration, automotive regenerative breaking and automotive emergency ahead and reverse movement.
The operator initiates the start. Switching from start to idle mode is automatic. The work mode is initiated automatically after the accelerator pedal (not illustrated) is depressed. The PHA charging by mean of engine can to occur during the automotive parking automatically. Also the hybrid can to provide PHA charging during the automotive deceleration that is regenerative breaking.
The operator switches start by key ignition (not illustrated) and the solenoid 366 switches distributor 364 to the engine start (
Thus PHA fluid supply actuated the stabilizer motor motion during the engine piston downwards stroke and during engine piston return stroke the PHA fluid supply actuated simultaneously the stabilizer motor motion and the pump plunger motion occurs in the capacity of linear hydraulic motor.
Because compensate piston ends fluidly connected with an axial canal located diametrically opposite to said pump chamber canal high pressure fluid from PHA actuated in turn an axial rods and compensate piston ends. So during the engine start occurs permanent pushing of an axial rods against the swash plate.
The stabilizer motor by pistons 154 (
The rotor by conic reducer, sprocket wheels and chain activate the engine camshaft, which by means of the pulley with belt actuate conventional accessory units: cooling system pump, electric system generator, steering pump (not illustrated).
During one half revolution, while the pump chamber canal connects with the pump inlet slot, the outlet slot is closed. During the second half revolution, while the rotor canal connects with the pump outlet slot, the inlet slot is closed. Such sequences occur in the all the operating modes.
So operates a high-power hydraulic starter. The starter is able to fast start and restart of the single cylinder engine.
The high pressurized fluid enables a quiet starting process to occur, and also enables an engine to shut down at every red traffic light with decreased fuel consumption. This is very valuable in particular for automobiles' hydrostatic transmission.
If the fluid pressure in the PHA is not sufficient the pump 402 (
The rotor angular velocity increases after the start up. A speed sensor (not illustrated) switches the solenoid 362 (
During the engine piston downwards motion (
The pump displacement volume approximately equal the stabilizer motor displacement volume. During the half rotor revolution (the engine piston downwards motion) the pump supply is the whole pump displacement volume but the stabilizer motor intake is only half of the pump volume. Because the pump coupled in parallel with PHA and with stabilizer motor by lines 374, 372, 344, 388 the pump's fluid volume surplus entered the PHA (
So occurs the engine piston return stroke by means of the stabilizer motor used the PHA energy and actuated the hybrid motion. The stabilizer motor actuated the hybrid motion independent of the engine piston direction movement.
The energy of combustion pressure is transmitted to the piston-plunger during its movement from the top end position (TEP) to the bottom end position (BEP). This process is illustrated in
The sliding holder 246 and hub 122 (
Because compensate piston ends fluidly connected with an axial canal located diametrically opposite to said pump chamber canal high pressure fluid from pneumohydraulic accumulator actuated in turn an axial rods and compensate piston ends. So during the idling occurs permanent pushing said axial rods against said swash plate.
Thus the synchronize mechanism provides the opposite movement of engine and compressor pistons. The rotor drives the engine camshaft by the conic reducer gearwheels 256, 258 (
So the synchronize mechanism provides the engine and compressor valves with motion, with consequent performance in compliance with a two-stroke working cycle; and each engine piston stroke from TEP to BEP is a power stroke.
The movement of all components of the synchronize mechanism in oil within pump chamber provides high quality lubrication and increase the efficiency.
The compressor piston and axial rod have equal strokes. The lever gives the piston-plunger an increased stroke, in accordance with the lever ratio.
Thus the opposing movement of the compressor and the engine pistons allows the space under the engine piston to function as chamber of the compressor. This ensures, that the noise is decreased, because static energy is used, that is air pressure, instead of air high speed, i.e. kinetic energy as in a conventional blower. Because the pistons are moving in opposing directions, the engine piston becomes in essence a compressor piston. This results in direct energy transmission for air compression, and provides increased efficiency.
The opposing movement provides simple and high-quality balancing of the system because the compressor piston compensates for the inertial forces influencing the piston and plunger. This considerable decreases the vibration and determines the stationary connection of the engine cylinder and hydrostatic motor by valve plate. This forms hydrostatic transmission solid monoblock.
The pistons' opposing movement provides a compressor displacement volume greater than the volume of the engine, because it is formed by the superposition of the motions of the engine and compressor pistons. This increases air mass intake and specific power of the engine. The idling mode continues as long as the accelerator pedal is not depressed.
The accelerator pedal (not illustrated) depression increases the rotor angular velocity and a speed sensor (not illustrated) switches off the solenoid 366 (
The
The
Simultaneously the fluid goes from hydraulic replenishing system via lines 384, 378 and distributor 358 to the pump inlet, provides necessary suction fluid pressure and provides return stroke of the engine piston. Thus occurs transforming the single pump plunger supply pulsation into uniform fluid flow feeding said hydrostatic motor during said engine power operation. The uniform fluid flow via hydrostatic motor determines the stabilizer motor and hydrostatic motor connection in series.
The hydrostatic motor smoothly operation occurs independent of the pump supply pulsation because the pump supply charges PHA and simultaneously actuates connecting in series hydrostatic motor and stabilizer motor during engine power stroke and during engine piston return stroke PHA fluid supply actuated the hybrid motion. This provides permanent pushing axial rods against the swash plate and allows use of one simple single cylinder hybrid instead of expensive, complicated and heavy multi-cylinder engine, compressor and a pump. Because direct energy transmission the engine piston return stroke occurs with minimum energy losses and minimum specific fuel consumption. Also this decreases weight, cost and installation space of the hybrid.
The energy of combustion pressure is transmitted to the piston-plunger during its movement from the TEP to the BEP during a half revolution of the rotor.
The greatest part of the power flow is the pump supply directly from the pump outlet to the motor.
The pump plunger fixed to the engine piston provides direct energy transmission. This allows use of one simple unit hybrid instead of two complicated and heavy regular units (an engine and a pump). Also the hybrid solves the problem of using reciprocating engine and compressor without a crankshaft or connecting rods. This increases efficiency and decreases fuel consumption.
The pump plunger disposition on the rotor's centerline allows a considerable increase in rotor speed rotation and transmission power in comparison with a conventional pump.
All these factors enable us to increase the pump power to equal the maximum engine power.
The second, and much smaller, part of the power flow uses the interaction of the underside of the engine piston with the compressor piston to compress air The compressor piston motion is provided by fluid pressure on the hub 122 in the pump chamber simultaneously with the pump power stroke, without cross forces. The air compression with direct energy transmission by means of the fluid pressure increases efficiency and decreases fuel consumption. The additional air cooling by the receiver water jacket 132 (
The third and smallest part of the power flow is transmitted to an engine and compressor valves and accessory units.
The location of the piston-plunger (inside the cylinder and simultaneously inside the hub 122) and the minimum magnitude of cross forces as it moves, allow the engine piston length to be minimized. The location of the compressor piston and the hub (simultaneously within the cylinder and the rotor) allows the compressor piston length to be minimized. This provides a compact design, minimizes piston mass and forces of inertia.
In work mode, the synchronize mechanism provides movement of the compressor piston and the rotation of the rotor, in synchronization with the piston-plunger movement, irrespective of the engine load or rate of acceleration.
Thus the power strokes of the engine, pump and compressor are taking place simultaneously, with direct energy transfer, without any intermediate mechanisms and without a cross force influence from the pistons or the plunger. This minimizes and simplifies the design, and increases the longevity and the efficiency of the hybrid.
In the hybrid, the weight and installation space are smaller than in the conventional system engine-pump thanks to the direct energy transmission.
The synchronize mechanism provides a two stroke working cycle; and each engine piston stroke from TEP to BEP is a power stroke. The piston-plunger in BEP and the compressor piston in TEP simultaneously complete their power stroke. The air is compressed in the receiver to maximum pressure.
The piston-plunger movement from BEP to TEP (
Because of its location on the side surface of the cylinder, the compressor intake valve diameter can be made much larger than the intake valve of a regular engine, with equal displacement volume. The intake air is cooler because it does not pass through the combustion chamber as with a conventional engine. This increases volumetric efficiency and air mass in the compressor chamber. Such joint factors improve the engine operation in all conditions and particular at low atmospheric pressure, for example, high above sea level.
The engine piston movement from BEP to TEP is comprised of three successive processes: combined clearing, joint compression, and finish compression (of the air in case of diesel, or of the mixture in case of gasoline engine) by the engine piston.
The combined clearing process is shown in the
There are three factors in the combined clearing process.
The valves 102, 104 are open. The piston-plunger moves from BEP to TEP and displaces the burned gases (the first factor). Simultaneously, high pressurized air, injected from the receiver through the open valve 102 also displaces the burned gases (the second factor). The clearing process provides the high-pressurized air, which was compressed in the previous stroke while the engine piston moved downward.
This combined action intensifies the exhaust process and increases the volumetric efficiency. The additional cooling (intercooling) of air by the water jacket of the receiver is the third factor. Thus the three joint factors improve the filling process (of the air in case of diesel, or of the mixture in case of gasoline engine) and increase the specific power of the engine. The combined clearing process ends when the exhaust valve is closed.
The joint compression process is shown in the
The exhaust valve 104 is closed and the air injection valve 102 is open. The engine piston continues movement, and, jointly with the air injection, increases air pressure in the cylinder because the air pressure within the receiver is greater than that within the combustion chamber. The joint compression process ends when the injection valve is closed.
The finish compression process is shown in the
The valves 102, 104 are closed. The engine piston continues compression. Before TEP, the pressure in the cylinder becomes the maximum. A conventional fuel injection system (not illustrated) provides the start of the engine power stroke. The working cycle ends after one rotor revolution.
Thus the two-cycle engine of the hybrid uses inexpensive four cycle engine cylinder head, with the intake valve functioning as an air injection valve. This valve replaces conventional two-cycle engine cylinder wall air ports, and improves the two-cycle engine operation. This solves the problem of boosting the two-cycle engine power by super high pressurized air injection and enables to realize a great potential possibility of a two-cycle engine—at least twice the specific power of a four-cycle engine with other things being equal.
The engine, compressor and pump operation is the function of the two independent arguments: first—the swash plate angle, second—the distance between the rotor centerline and the swash plate hinge pin axis. The first argument determines the engine, compressor and pump displacement volume. The second argument determines the engine compression ratio. The widely known engine compression ratio determines the kind of fuel (fuel octane rate) and determines a very important requirement: the engine compression ratio must be independent of the engine displacement volume change while the engine operates with the given fuel. This requirement executes in full the hybrid synchronize mechanism in accordance with the next proof.
The proof of the engine displacement volume changing independent of the engine compression ratio (see
The hybrid compressor piston stroke h per half rotor revolution is equal to the axial rod stroke and in accordance with the widely know axial mechanism is
h= tan (1)
where is the distance between axial rod axis
The engine piston stroke greater than the compressor piston stroke h in accordance with the lever ratio i=(a+b)/b where a, b is the lever arms
=ih=i tan (2)
where is the engine piston stroke
=(δ+)/δ (3)
where δ is the engine piston clearance
Let's swash plate hinge pin axis dispose on the line connecting an axial rod sphere centers.
If =0: =0 and δ=0 (4)
The engine piston clearance δ is
δ=iε tan (5)
here ε is the distance between the axial rod axis
The equations (2), (3), (4) and (5) gives the engine compression ratio.
=1+/ε (6)
Because ε=−L/2 (7)
where is the distance between the rotor centerline
=(2+)/(2−) (8)
hence
=(+1)/2(−1) (9)
The proof gives us:
Lets the engine with the distance between axial rod axis L=60 mm works with the compression ratio Λ=10 and the equation (9) gives B=36.7 mm.
Lets the other fuel requires the engine compression ratio two times greater with Λ=20 and the equation (9) gives B=33.2 mm.
This example illustrate that the distance B small change gives great engine compression ratio alteration. Also this example illustrates the effective and easy method of the engine transformation into an omnivorous engine by means of the distance B alteration (moveable hinge pin).
The
The swash plate turn mechanism and swash plate turn hydraulic system realizes the possibility of the engine operating with the variable displacement volume and the invariable engine compression ratio while the swash plate hinge pin is fixed (B=const).
The swash plate shift mechanism and swash plate shift hydraulic system realizes the possibility of the engine operating with a different kind of fuel, and the engine becomes, in essence, an omnivorous engine.
The engine, compressor and pump variable displacement volume gives the additional ability of adapting the engine power to the automotives wider variable load and speed range.
The engine and compressor displacement volume simultaneously increase gives the additional ability of adapting the engine power to the automotives wider variable load and speed range.
The hydrostatic motor and stabilizer motor connection in series enable said hydrostatic motor displacement volume to control automatic by stabilizer motor inlet fluid pressure to maintain permanent independent of the engine load and cycle per min.
The engine, compressor and pump variable displacement volume provides of the engine operation with the minimum specific fuel consumption during the automotives wider variable load and speed range.
The
The
The
All these factors combine to provide use of the progressive hydrostatic transmission with variable displacement volume of the engine, compressor, pump and hydrostatic motor instead of widespread automotive engine and automatic transmission, thereby minimizing the weight, installation space, cost, labor and fuel consumption. Pneumohydraulic accumulator charging.
While the hydrostatic motor shaft is stopped the PHA fluid pressure low magnitude determines the signal from the fluid pressure sensor (not illustrated) and on board computer (not illustrated) automatic switches on the solenoid 368 of the distributor 364. The distributors 358 solenoid 362 is switched off. The fluid flow occurs in accordance with hydraulic diagram
During the engine piston power stroke the pump supply goes to the PHA and spin valve with the distributor 364 provides fluid supply to the stabilizer motor inlet from replenishing system pump 68. During the engine piston return stroke spin valve with the distributor 364 provides the PHA fluid supply to the stabilizer motor inlet and simultaneously distributors 358 provides fluid supply to the pump inlet from pump 68.
Because the stabilizer motor intake during the half rotor revolution is only half of the pump displacement volume (stabilizer motor volume and pump volume is approximately equal during whole cycle) about half pump displacement volume of the fluid entered the PHA during one cycle (one rotor revolution). So the PHA fluid pressure increases during one cycle. The signal from the fluid pressure sensor switches off the solenoid 368, and switches on the solenoid 366 and the distributor 364 switches to the idling position when the fluid pressure achieves maximum. Thus the engine fast charges the PHA automatically. The hybrid solves the problem of charging a PHA automatically, irrespective of the parking time, even if the fluid pressure is greatly decreased. The starter pump 402 (
The variable displacement volume of the engine, pump and hydrostatic motor providing the engine power adaptation to the wider variable load and speed range enables the hydrostatic motor and electric motor direct mechanically association. The hybrid system provides stand-by electric energy utilization by means of plug in during the electric motor in the generator mode charges the electric battery (not illustrated). So the hydrostatic motor 44 and electric motor 46 shafts connecting to one gear 352 (
The gear 352 can be connected to automotive wheels by means of differential (not illustrated) and in case of both clutches disengaged the automotive can be braked, can free rolling and the electric motor in mode of the generator can charging the electric battery by means of plug-in. Both clutches engaged during hard acceleration from a stop and provide maximum power, in this case hydrostatic motor and electric motor work in tandem. This mode operation occurs when driving conditions demand more power, such as while climbing a hill or passing other vehicles. In case of hydrostatic motor's clutch engaged and electric motor's clutch disengaged the automotive drives engine by hydrostatic transmission. The case of hydrostatic motor's clutch disengaged and electric motor's clutch engaged provides possibility of the regenerative braking, the electric battery charging during the automotive deceleration and stand-by energy to increase. All this mode operation with engine variable displacement volume considerable decreases the fuel consumption.
All hybrid advantages enable us considerable to decrease the automotive fuel consumption.
The following illustrate the approximate fuel economy of the monocylindrical hybrid use in a car with the progressive hydrostatic transmission under city driving conditions.
The monocylindrical hybrid with the direct energy transmission, variable engine, compressor and pump displacement volume and hydrostatic transmission energy recuperation enables us to achieve approximately 80 miles per gallon in city conditions and to maintain the automotive acceleration magnitude.
The monocylindrical hybrid enables at least:
Thanks to the foregoing advantages the monocylindrical hybrid may be used in trucks, locomotives, boats, motor-cycles, aircraft, portable power systems, construction machinery, automobiles and other kind of the automotive and equipment.