The invention relates generally to vehicle engines, and in particular, vehicle engines which are turbocharged or supercharged.
Turbocharged and supercharged engines may be configured to compress ambient air entering the engine in order to increase power. Because compression of the air may cause an increase in air temperature, a charge air cooler may be utilized to cool the heated air thereby increasing its density and further increasing the potential power of the engine. If the humidity of the ambient air is high, however, condensation (e.g., water droplets) may form on any internal surface of the charge air cooler that is cooler than the dew point of the compressed air. During transient conditions such as hard vehicle acceleration, these water droplets may be blown out of the charge air cooler and into the combustion chambers of the engine resulting in increased potential for engine misfire, loss of torque and engine speed, and incomplete combustion, for example.
One approach for reducing the amount of condensation entering the combustion chambers is disclosed in US Patent Application Publication 2011/0094219 A1. In the cited reference, a condensation trap for a charge air cooler that reduces the rate at which condensation enters the combustion chambers of the engine is disclosed. The condensation trap includes a reservoir for collecting the condensate and a tube for releasing the condensate back to the outlet duct.
The inventors herein have recognized various issues with the above system. In particular, the condensation trap is positioned downstream of the charge air cooler and thus can only collect condensation downstream from an outlet of the charge air cooler. This configuration may not adequately address condensation trapped within the charge air cooler. Furthermore, condensation traps necessitate additional componentry that may increase the cost and the packaging space of the charge air cooler.
As such, one example approach to address the above issues includes a charge air coder comprising an inlet to admit charge air, a plurality of heat exchange passages to remove heat from the charge air, an outlet configured to discharge the charge air from the heat exchange passages to an intake passage upstream of an intake manifold of an engine, and a dispersion element extending at least partially across the outlet.
In this way, condensate that accumulates in the charge air coder may be driven out of the coder via movement of the charge air. However, the condensate which enters the engine during idle conditions may be problematic in that the engine is likely to misfire under these conditions.
The above advantages and other advantages, and features of the present description will be readily apparent from the following detailed description when taken alone or in connection with the accompanying
Accordingly, the present disclosure provides a condensation dispersion device for a vehicle engine using a turbocharger. The condensation dispersion device includes a valve body, a movable valve, and a biasing means. The movable valve and biasing means are disposed within the valve body. The valve body defines a valve seat having a top/upper surface within the valve body, and includes an inlet end and an outlet. The movable valve defines an engagement feature operatively configured to engage with the valve seat when the movable valve is in a first closed position. The biasing means is operatively configured to urge the movable valve to a second open position when the pressure in the intake manifold is equal to or greater than a specified operating pressure.
In another embodiment of the present disclosure, a condensate dispersion assembly for a vehicle engine using a turbocharger includes an intake manifold, a throttle body, a dispersion device and a charge air cooler. The intake manifold may be operatively configured to transfer air from an intake passage to a combustion chamber. The throttle body may actuated by a throttle actuator. The throttle body may be affixed to the intake manifold at an intake opening of the intake manifold. The dispersion device may be affixed to the intake manifold such that an outlet of the dispersion device is disposed within the intake manifold and an inlet is disposed outside of the intake manifold. The charge air cooler may be coupled to the throttle body via the intake passage and coupled to the intake manifold via a condensate hose and the dispersion device.
The condensate dispersion device may, but not necessarily, comprise a quick connect coupling the inlet of the dispersion device to a hose outlet. The dispersion device may be operatively configured to open and close the flow of condensate into the intake manifold. The dispersion device may also include a valve body housing a biasing means, and a movable valve. The biasing means may be operatively configured to urge the movable valve from a first position to a second position. The movable valve may operatively configured to slide to the first position and the biasing means is operatively configured to compress when pressure inside of the intake manifold drops below atmospheric pressure.
The movable valve may be urged by the biasing means to the second position when pressure inside of the intake manifold is at or above atmospheric pressure. The biasing means may, but not necessarily, be in the form of a spring which has a spring rate which exceeds atmospheric pressure. It is also understood that the movable valve may include a flange which engages with a valve seat defined in the valve body when the movable valve is in the first position. Moreover, the movable valve may, but not necessarily, include a plurality of radial ribs operatively configured to maintain the axial position of the movable valve within the valve body.
The present disclosure and its particular features and advantages will become more apparent from the following detailed description considered with reference to the accompanying drawings.
These and other features and advantages of the present disclosure will be apparent from the following detailed description, best mode, claims, and accompanying drawings in which:
Like reference numerals refer to like parts throughout the description of several views of the drawings.
Reference will now be made in detail to presently preferred compositions, embodiments and methods of the present disclosure, which constitute the best modes of practicing the present disclosure presently known to the inventors. The figures are not necessarily to scale. However, it is to be understood that the disclosed embodiments are merely exemplary of the present disclosure that may be embodied in various and alternative forms. Therefore, specific details disclosed herein are not to be interpreted as limiting, but merely as a representative basis for any aspect of the present disclosure and/or as a representative basis for teaching one skilled in the art to variously employ the present disclosure.
Except in the examples, or where otherwise expressly indicated, all numerical quantities in this description indicating amounts of material or conditions of reaction and/or use are to be understood as modified by the word “about” in describing the broadest scope of the present disclosure. Practice within the numerical limits stated is generally preferred. Also, unless expressly stated to the contrary: percent, “parts of,” and ratio values are by weight; the description of a group or class of materials as suitable or preferred for a given purpose in connection with the present disclosure implies that mixtures of any two or more of the members of the group or class are equally suitable or preferred; the first definition of an acronym or other abbreviation applies to all subsequent uses herein of the same abbreviation and applies mutatis mutandis to normal grammatical variations of the initially defined abbreviation; and, unless expressly stated to the contrary, measurement of a property is determined by the same technique as previously or later referenced for the same property.
It is also to be understood that this present disclosure is not limited to the specific embodiments and methods described below, as specific components and/or conditions may, of course, vary. Furthermore, the terminology used herein is used only for the purpose of describing particular embodiments of the present present disclosure and is not intended to be limiting in any way.
It must also be noted that, as used in the specification and the appended claims, the singular form “a,” “an,” and “the” comprise plural referents unless the context clearly indicates otherwise. For example, reference to a component in the singular is intended to comprise a plurality of components.
The term “comprising” is synonymous with “including,” “having,” “containing,” or “characterized by.” These terms are inclusive and open-ended and do not exclude additional, unrecited elements or method steps.
The phrase “consisting of” excludes any element, step, or ingredient not specified in the claim. When this phrase appears in a clause of the body of a claim, rather than immediately following the preamble, it limits only the element set forth in that clause; other elements are not excluded from the claim as a whole.
The phrase “consisting essentially of” limits the scope of a claim to the specified materials or steps, plus those that do not materially affect the basic and novel characteristic(s) of the claimed subject matter.
The terms “comprising”, “consisting of”, and “consisting essentially of” can be alternatively used. Where one of these three terms is used, the presently disclosed and claimed subject matter can include the use of either of the other two terms.
Throughout this application, where publications are referenced, the disclosures of these publications in their entireties are hereby incorporated by reference into this application to more fully describe the state of the art to which this present disclosure pertains.
The following detailed description is merely exemplary in nature and is not intended to limit the present disclosure or the application and uses of the present disclosure. Furthermore, there is no intention to be bound by any theory presented in the preceding background or the following detailed description.
Referring now to
Combustion chambers 30 may receive intake air from intake manifold 44 via intake passage 42 and may exhaust combustion gases via exhaust manifold 46 to exhaust passage 48. Intake manifold 44 and exhaust manifold 46 can selectively communicate with combustion chamber 30 via respective intake valves and exhaust valves (not shown). In some embodiments, combustion chamber 30 may include two or more intake valves and/or two or more exhaust valves. Further, intake and exhaust valves may be part of a variable valve timing system configured to open and close the valves at different timings depending on operating conditions.
Fuel injectors 50 are shown coupled directly to combustion chamber 30 for injecting fuel directly therein in proportion to the pulse width of signal FPW received from controller 12. In this manner, fuel injector 50 provides what is known as direct injection of fuel into combustion chamber 30; however it will be appreciated that port injection is also possible. Fuel may be delivered to fuel injector 50 by a fuel system (not shown) including a fuel tank, a fuel pump, and a fuel rail.
Intake passage 42 may include throttle 21 having a throttle plate 22 to regulate air flow to the intake manifold. In this particular example, the position of throttle plate 22 may be varied by controller 12 to enable electronic throttle 21 control (ETC). In this manner, throttle 21 may be operated to vary the intake air provided to combustion chamber 30 among other engine cylinders. In some embodiments, additional throttles may be present in intake passage 42.
Further, in the disclosed embodiments, an exhaust gas recirculation (EGR) system may route a desired portion of exhaust gas from exhaust passage 48 to intake passage 42 via EGR passage 140. The amount of EGR provided to intake passage 42 may be varied by controller 12 via EGR valve 142. Under some conditions, the EGR system may be used to regulate the temperature of the air and fuel mixture within the combustion chamber.
Engine 10 may further include a compression device such as a turbocharger or supercharger including at least a compressor 60 arranged along intake manifold 44. For a turbocharger, compressor 60 may be at least partially driven by a turbine 62, via, for example a shaft, or other coupling arrangement. The turbine 62 may be arranged along exhaust passage 48. Various arrangements may be provided to drive the compressor. For a supercharger, compressor 60 may be at least partially driven by the engine 10 and/or an electric machine, and may not include a turbine. Thus, the amount of compression provided to one or more cylinders of the engine 10 via a turbocharger or supercharger may be varied by controller 12. In some cases, the turbine 62 may drive, for example, an electric generator 64, to provide power to a battery 66 via a turbo driver 68. Power from the battery 66 may then be used to drive the compressor 60 via a motor 70.
Further, exhaust passage 48 may include wastegate 26 for diverting exhaust gas away from turbine 62. Additionally, intake passage 42 may include a compressor recirculation valve (CRV) 27 configured to divert intake air around compressor 60. Wastegate 26 and/or CRV 27 may be controlled by controller 12 to be opened when a lower boost pressure is desired, for example.
Intake passage 42 may further include charge air cooler (CAC) 80 (e.g., an intercooler) to decrease the temperature of the turbocharged or supercharged intake gases. In some embodiments, charge air cooler 80 may be an air to air heat exchanger. In other embodiments, charge air cooler 80 may be an air to liquid heat exchanger. As described in more detail below, charge air cooler 80 and the intake manifold 44 may include a dispersion element to disperse accumulated condensate into droplets that may be evaporated by the moving charge air and directed to the intake manifold of the engine 10.
Controller 12 is shown in
As shown,
As shown in
As shown, a filter 78 may be affixed within the valve chamber 94. The filter 78 may include a screen like material 82 to prevent solid particles from flowing through the dispersion device 16 and into the intake manifold 44. The screen like material 82 may be flexible and may be supported by a frame 84. With reference to
Referring now to
Referring back to
Accordingly,
With reference to
Referring now to
Accordingly,
As indicated earlier, the change in pressure within the intake manifold (outlet side of the valve body) relative to the atmospheric pressure (on the inlet side of the valve body) causes the passive poppet valve 34 in the dispersion device 16 to move between an open and closed position so that condensation cannot travel through the valve chamber 94 of the dispersion device 16 from the inlet side 28 to the outlet side 32 and into the intake manifold. As shown, hose 100 connects the charge air cooler to the intake manifold and the hose 100 is attached to the dispersion device 16 via a quick connect.
While at least one exemplary embodiment has been presented in the foregoing detailed description, it should be appreciated that a vast number of variations exist. It should also be appreciated that the exemplary embodiment or exemplary embodiments are only examples, and are not intended to limit the scope, applicability, or configuration of the disclosure in any way. Rather, the foregoing detailed description will provide those skilled in the art with a convenient road map for implementing the exemplary embodiment or exemplary embodiments. It should be understood that various changes can be made in the function and arrangement of elements without departing from the scope of the disclosure as set forth in the appended claims and the legal equivalents thereof.
Number | Name | Date | Kind |
---|---|---|---|
4151862 | Ueda | May 1979 | A |
5676405 | Reed | Oct 1997 | A |
7083157 | Kingsford | Aug 2006 | B2 |
7530336 | Brecheisen, II | May 2009 | B2 |
7546935 | Wheaton | Jun 2009 | B2 |
9010112 | Palm | Apr 2015 | B2 |
9267424 | Wicks | Feb 2016 | B2 |
9382836 | Maceroni | Jul 2016 | B2 |
9409108 | Lin | Aug 2016 | B2 |
20040244782 | Lewallen | Dec 2004 | A1 |
20070107425 | Appleton | May 2007 | A1 |
20140076289 | Ruona et al. | Mar 2014 | A1 |
20140102428 | Fulton | Apr 2014 | A1 |
20150176478 | Wicks | Jun 2015 | A1 |
20150176480 | Maceroni | Jun 2015 | A1 |
20160090894 | Sato | Mar 2016 | A1 |
20160160744 | Wicks | Jun 2016 | A1 |
Number | Date | Country | |
---|---|---|---|
20180149121 A1 | May 2018 | US |