Patent Application
20190186497
The present application claims priority to Korean Patent Application No. 10-2017-0174559 filed on Dec. 18, 2017, the entire contents of which is incorporated herein for all purposes by this reference.
The present invention relates to a coolant pump and a cooling system including the same for a vehicle reducing a warm-up time of an engine and preventing a thermal shock by respectively controlling a coolant supplied to a cylinder block and a cylinder heady according to a driving condition.
An engine discharges thermal energy to an outside while generating torque based on combustion of a fuel. A coolant absorbs thermal energy while circulating through an engine, etc. and releases the thermal energy to an outside through a radiator, etc.
When a temperature of the coolant of the engine is low, viscosity of oil may increase to increase frictional force and fuel consumption, and a temperature of an exhaust gas may increase gradually to lengthen a time for a catalyst to be activated. Also, a quality of an exhaust gas may be deteriorated, and as a time required for a function of the heater to be normalized is increased, a driver may be in discomfort.
When the coolant temperature is excessively high, since knocking occurs, performance of the engine may deteriorate by adjusting ignition timing to suppress the knocking. Further, when a temperature of lubricant is excessively high, a viscosity is lowered such that a lubrication performance may be deteriorated.
Therefore, a coolant control valve to control several cooling elements through one valve device, such as keeping the high temperature of the coolant for a certain portion of the engine and keeping the low temperature of the coolant for other portion low is applied.
When the coolant temperature rises in the engine, the thermostat opens and the coolant circulates to the radiator. In the instant case, since the radiator coolant temperature is a low temperature, a sudden change (a coolant over/under shoot and hunting) of the coolant temperature occurs.
In the instant case, since the coolant temperature change is large by a head and a block inside the engine and the radiator, a heater core, an oil cooler, an exhaust gas recirculation (EGR) cooler, etc., the engine receives a thermal shock such that a durability may be deteriorated.
Such a phenomenon is similar problem in a multi-stage control water pump, in which the coolant temperature change is suddenly generated when a slider opens and then the coolant is circulated.
In the graph, in the case of the intermittent flow stoppage, it may be confirmed that many temperature differences occur such that the thermal shock occurs severely.
In the case that the water pump is always operated, the metal surface temperature of the head and the block and the coolant temperature are stably increased, however there is a problem that the warm-up time is delayed
The information disclosed in the present Background of the Invention section is only for enhancement of understanding of the general background of the invention and may not be taken as an acknowledgement or any form of suggestion that the present information forms the prior art already known to a person skilled in the art.
Various aspects of the present invention are directed to providing a coolant pump and a cooling system including the same for a vehicle for reducing a warm-up time of the engine and preventing a thermal shock.
A coolant pump for a vehicle according to an exemplary embodiment of the present invention may include an impeller mounted at one side of a shaft and pumping a coolant; a pulley mounted at the other side of the shaft and receiving a torque; a coolant pump housing including an inlet to which the coolant inflows and a discharge port formed in a vertical to the shaft; a slider disposed to be movable in a longitudinal direction of the shaft to selectively block or open the discharge port; and a driver moving the slider, wherein a fine passage that the coolant is expelled to the discharge port is formed at the slider.
The slider may include a vertical portion formed in a vertical direction of the shaft; and a block portion formed to be bent at the vertical portion and selectively blocking the discharge port, and the fine passage is formed at the block portion.
The fine passage may be a groove formed at one end portion of the block portion.
A pump housing groove may be formed at the portion of the pump housing in contact with the block portion, a fine protrusion portion may be formed at the block portion, and the fine passage may be formed between the fine protrusion portion and the pump housing groove.
The fine passage may be a hole formed at one side of the block portion.
The fine passage may be formed in plural.
The driver may include a coolant transmitting portion transmitting a coolant transmitted through the inlet; a control device exhausting the coolant transmitted from the coolant transmitting portion to an outside or again transmitting the coolant to the coolant pump; and a control chamber formed by the slider and the coolant pump housing and moving the slider according to the transmission of the coolant from the control device.
The coolant pump for the vehicle according to an exemplary embodiment of the present invention may further include a return elastic portion provided between the slider and the impeller to elastically support the slider.
The coolant pump for the vehicle according to an exemplary embodiment of the present invention may further include a supporting member provided between the slider and the impeller to support the return elastic portion.
The control device may include a check valve preventing the coolant transmitted from the coolant transmitting portion from being returned to the coolant transmitting portion, a solenoid opening or closing the check valve and a controller configured for controlling an operation of the solenoid.
A cooling system of a vehicle according to an exemplary embodiment of the present invention may include a cylinder block; a cylinder head coupled with the cylinder block; and a coolant pump for a vehicle supplying a coolant to the cylinder block and the cylinder head, wherein the coolant pump for the vehicle may include an impeller mounted at one side of a shaft and pumping the coolant; a pulley mounted at the other side of the shaft and receiving a torque; a coolant pump housing including an inlet to which the coolant inflows and a discharge port formed in a vertical to the shaft; a slider disposed to be movable in a longitudinal direction of the shaft to selectively block or open the discharge port; and a driver moving the slider, and a fine passage that the coolant is expelled to the discharge port is formed at the slider.
The slider may include a vertical portion formed in a vertical direction of the shaft; and a block portion formed to be bent at the vertical portion and selectively blocking the discharge port, and the fine passage may be formed at the block portion.
The fine passage may be a groove formed at one end portion of the block portion.
A pump housing groove may be formed at the portion of the pump housing in contact with the block portion, a fine protrusion portion may be formed at the block portion, and the fine passage may be formed between the fine protrusion portion and the pump housing groove.
The fine passage may be a hole formed at one side of the block portion.
The fine passage may be formed in plural.
The driver may include a coolant transmitting portion transmitting a coolant transmitted through the inlet; a control device exhausting the coolant transmitted from the coolant transmitting portion to an outside or again transmitting the coolant to the coolant pump; and a control chamber formed by the slider and the coolant pump housing and moving the slider according to the transmission of the coolant from the control device.
A cooling system for a vehicle according to an exemplary embodiment of the present invention may further include a return elastic portion provided between the slider and the impeller to elastically support the slider.
A cooling system for a vehicle according to an exemplary embodiment of the present invention may further include a supporting member provided between the slider and the impeller to support the return elastic portion.
The control device may include a check valve preventing the coolant transmitted from the coolant transmitting portion from being returned to the coolant transmitting portion, a solenoid opening or closing the check valve and a controller configured for controlling an operation of the solenoid.
The coolant pump and the cooling system including the same according to an exemplary embodiment of the present invention may reduce the warm-up time of the engine and may prevent the thermal shock by respectively controlling the coolant supplied to the cylinder block and cylinder head according to the driving condition.
The methods and apparatuses of the present invention have other features and advantages which will be apparent from or are set forth in more detail in the accompanying drawings, which are incorporated herein, and the following Detailed Description, which together serve to explain certain principles of the present invention.
It may be understood that the appended drawings are not necessarily to scale, presenting a somewhat simplified representation of various features illustrative of the basic principles of the invention. The specific design features of the present invention as disclosed herein, including, for example, specific dimensions, orientations, locations, and shapes will be determined in part by the particularly intended application and use environment.
In the figures, reference numbers refer to the same or equivalent parts of the present invention throughout the several figures of the drawing.
Reference will now be made in detail to various embodiments of the present invention(s), examples of which are illustrated in the accompanying drawings and described below. While the invention(s) will be described in conjunction with exemplary embodiments, it will be understood that the present description is not intended to limit the invention(s) to those exemplary embodiments. On the contrary, the invention(s) is/are intended to cover not only the exemplary embodiments, but also various alternatives, modifications, equivalents and other embodiments, which may be included within the spirit and scope of the invention as defined by the appended claims.
Hereinafter, various exemplary embodiments of the present invention will be described with reference to the accompanying drawings.
The sizes and thicknesses of the configurations shown in the drawings are provided selectively for the convenience of description, such that the present invention is not limited to those shown in the drawings and the thicknesses are exaggerated to make some parts and regions clear.
However, parts irrelevant to the description will be omitted to clearly describe the exemplary embodiments of the present invention, and the same or similar constituent elements will be designated by the same reference numerals throughout the specification.
In the following description, names of constituent elements are classified as a first . . . , a second . . . , and the like to discriminate the constituent elements having the same name, and the names are not necessarily limited to the order.
Referring to
The coolant pump 105 is disposed at a coolant entrance side of the cylinder block 110, and the coolant control module 140 is disposed at a coolant outlet side of the cylinder block 110.
The coolant control module 140 may control the coolant passing through the low pressure EGR cooler 155 and the heater core 165, may control the coolant passing through the EGR valve 160, may control the coolant passing through the radiator 135, and may control the coolant passing through the transmission oil warmer 130 and the oil cooler 125.
The coolant control module 140 may be a flow rate control configuration of mechanical or electronic various shapes.
The reservoir tank 150 is connected to the coolant line connected into the radiator 135, and the coolant of the reservoir tank 150 is connected into the intake side of the coolant pump 105. Also, the thermostat 115 is opened or closed depending on a coolant temperature, a disposition location may be changed depending on a design specification, and in an exemplary embodiment of the presently claimed invention, it may not be installed.
A coolant temperature sensor 145 detecting a temperature of the coolant passing through the cylinder block 110 is disposed, and a coolant temperature sensor 146 detecting a temperature of the coolant passing through the coolant control module 140 is disposed.
In an exemplary embodiment of the present invention, a structure in which the coolant control module 140 distributes the coolant to coolant parts, etc. is not limited to the drawing, and numerous variations are possible. Also, a structure and a function of the coolant parts (such as a heater core and a radiator) are obvious to ordinary technicians in the technical fields, so repeated explanations are omitted.
The coolant pump 105 pumps the coolant exhausted from the coolant parts. Also, the coolant pump 105 may control the coolant pumped into the cylinder head 100 and the cylinder block 110 depending on a rotation speed (RPM), a driving load (a fuel injection rate, etc.), a coolant temperature, etc. of the engine.
The structure of the coolant pump 105 is described with reference to
Referring to
The discharge ports 212 and 213 communicate with the cylinder block 110, or the cylinder block 110 and the cylinder head 100, and supplies the coolant to the cylinder block 110, or the cylinder block 110 and the cylinder head 100 if the discharge ports 212 and 213 are opened.
The pulley 205 is mounted on one end portion of the shaft 200, and the pulley 205 receives a torque from an output shaft of the engine to rotate the shaft 200.
The impeller 230 is mounted on an external circumference of the shaft 200 and includes a rotation disk 232 of a disk shape and a wing 234 formed at one surface of the rotation disk 232.
The driver includes a coolant transmitting portion 250 transmitting the coolant transmitted through the inlet 211, a control device 290 exhausting the coolant transmitted from the coolant transmitting portion 250 to the outside or again transmitting the coolant to the coolant pump 105, and a control chamber 260 formed by the slider 215 and the coolant pump housing 210 and moving the slider 215 depending on the transmission of the coolant from the control device 290.
A coolant transmission hole 235 may be formed at the coolant pump housing 210 to communicate the inlet 211 and the coolant transmitting portion 250.
A return elastic portion 245 is provided between the slider 215 and the impeller 230 to elastically support the slider 215 and a supporting member 240 may be provided between the slider 215 and the impeller 230 to support the return elastic portion 245.
The control device 290 includes a check valve 275 preventing the coolant transmitted from the coolant transmitting portion from being returned to the coolant transmitting portion or reduce the amount of the coolant transmitted from the coolant transmitting portion to the coolant transmitting portion , a solenoid 270 opening or closing the check valve 275, and a controller 280 controlling the operation of the solenoid 270.
In an exemplary embodiment of the presently claimed invention, a first passage 410 is connected to the coolant transmitting portion 250 and the check valve 295 and a second passage 420 is connected to the control chamber and the check valve 295.
The first passage 410 and the second passage 40 are connected to the check valve 295 in parallel.
The slider 215 includes a vertical portion 215b formed in a vertical direction of the shaft 200 and a block portion 215a formed to be curved from the vertical portion 215b to selectively block the discharge ports 212 and 213.
Referring to
Next, the operation of the coolant pump for the vehicle according to an exemplary embodiment of the present invention is described with reference to
In the state that the pulley 205 is rotated, the portion of the coolant transmitted to the inlet 211 is transmitted to the check valve 275 through the coolant transmission hole 235 and the coolant transmitting portion 250.
The controller 280 determines an opening rate of the slider 215 based on a measuring signal of a vehicle operation state including signals of the coolant temperature sensor, the outdoor temperature sensor, etc., and outputs the signal corresponding to the opening rate to the solenoid 270, the check valve 275 is opened or closed depending on the operation of the solenoid 270.
As shown in
As shown in
Incidentally, as shown in
However, as shown in
As shown in
As shown in
Also, as shown in
The fine passage may be formed in plural.
The coolant pump and the cooling system including the same according to an exemplary embodiment of the present invention may reduce the warm-up time of the engine and may prevent the thermal shock by respectively controlling the coolant supplied to the cylinder block and cylinder head according to the driving condition.
For convenience in explanation and accurate definition in the appended claims, the terms “upper”, “lower”, “internal”, “outer”, “up”, “down”, “upper”, “lower”, “upwards”, “downwards”, “front”, “rear”, “back”, “inside”, “outside”, “inwardly”, “outwardly”, “internal”, “external”, “internal”, “outer”, “forwards”, and “backwards” are used to describe features of the exemplary embodiments with reference to the positions of such features as displayed in the figures.
The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. They are not intended to be exhaustive or to limit the invention to the precise forms disclosed, and obviously many modifications and variations are possible in light of the above teachings. The exemplary embodiments were chosen and described to explain certain principles of the invention and their practical application, to enable others skilled in the art to make and utilize various exemplary embodiments of the present invention, as well as various alternatives and modifications thereof. It is intended that the scope of the invention be defined by the Claims appended hereto and their equivalents.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10-2017-0174559 | Dec 2017 | KR | national |
