阅读说明：本技术 一种混合动力车辆供油系统及车辆 (Hybrid vehicle oil supply system and vehicle ) 是由 陈冲 牛华东 李书福 蔡文远 苏茂辉 于 2019-08-28 设计创作，主要内容包括：本发明公开了一种混合动力车辆供油系统,其特征在于,所述供油系统包括第一发动机、第二发动机、第一燃料供给系统和第二燃料供给系统；所述第一燃料供给系统包括第一油箱,所述第二燃料供给系统包括第二油箱,所述第一燃料供给系统能够为所述第一发动机和/或所述第二发动机供给所述第一油箱内的燃料；所述第二燃料供给系统能够为所述第一发动机和/或所述第二发动机供给所述第二油箱内的燃料。本发明将同一车辆的两个发动机接同一套第一燃料供给系统和同一套第二燃料供给系统,通过对阀体和油泵的控制,实现两套供给系统对两个发动机的两种燃料供应,根据需求在不同条件下供给不同燃料,控制简便,降低了成本及布置难度。(the invention discloses an oil supply system of a hybrid vehicle, which is characterized by comprising a first engine, a second engine, a first fuel supply system and a second fuel supply system; the first fuel supply system comprises a first oil tank, the second fuel supply system comprises a second oil tank, and the first fuel supply system can supply the first engine and/or the second engine with fuel in the first oil tank; the second fuel supply system may be configured to supply the first engine and/or the second engine with fuel in the second fuel tank. According to the invention, two engines of the same vehicle are connected with the same set of first fuel supply system and the same set of second fuel supply system, the two sets of supply systems supply two kinds of fuel to the two engines through controlling the valve body and the oil pump, different fuels are supplied under different conditions according to requirements, the control is simple and convenient, and the cost and the arrangement difficulty are reduced.)

1. A hybrid vehicle oil supply system, characterized in that the oil supply system comprises a first engine (1), a second engine (2), a first fuel supply system (3) and a second fuel supply system (4); the first fuel supply system (3) comprises a first fuel tank (301), the second fuel supply system (4) comprises a second fuel tank (401), and the first fuel supply system (3) is used for supplying the first engine (1) and/or the second engine (2) with fuel in the first fuel tank (301); the second fuel supply system (4) is used for supplying the first engine (1) and/or the second engine (2) with fuel in the second oil tank (401).

2. Hybrid vehicle oil supply system according to claim 1, characterized in that the oil supply system further comprises an oil pump control unit, the first fuel supply system (3) further comprises a first oil pump (302), the second fuel supply system (4) further comprises a second oil pump (402), and the oil pump control unit is configured to control whether the first oil pump (302) and/or the second oil pump (402) is/are operated.

3. the hybrid vehicle oil supply system according to claim 2, characterized by further comprising a first valve body (5), a second valve body (6), and a valve body control unit for controlling opening and closing of the first valve body (5) and/or the second valve body (6).

4. The hybrid vehicle oil supply system of claim 3, wherein the fuel in the first oil tank (301) is methanol, and the fuel in the second oil tank (401) is gasoline.

5. The hybrid vehicle oil supply system according to claim 4, further comprising a water temperature detection unit for detecting water temperatures of the first engine (1) and the second engine (2) and sending the detection results to the oil pump control unit and the valve body control unit.

6. the hybrid vehicle oil supply system according to claim 5, wherein the oil pump control unit is configured to control whether the first oil pump (302) and/or the second oil pump (402) is operated or not, based on the received detection result.

7. The hybrid vehicle oil supply system according to claim 5, wherein the valve body control unit is configured to control opening and closing of the first valve body (5) and/or the second valve body (6) according to the received detection result.

8. The hybrid vehicle oil supply system according to claim 6 or 7, wherein the first fuel supply system (3) further includes a first pressure regulating valve (303) and a first filter (304); the first pressure regulating valve (303) is used for regulating the working pressure of fuel oil in a methanol pipeline, and the first filter (304) is used for filtering impurities in the methanol fuel; the second fuel supply system (4) further comprises a second pressure regulating valve (403) and a second filter (404); the second pressure regulating valve (403) is used for regulating the working pressure of fuel in the gasoline pipeline, and the second filter (304) is used for filtering impurities in the gasoline fuel.

9. The hybrid vehicle oil supply system according to claim 7, wherein the first valve body (5) and the second valve body (6) employ dual electromagnetic valves.

10. A vehicle characterized in that the hybrid vehicle oil supply system according to any one of claims 1 to 6 or 9 is applied.

Technical Field

The invention belongs to the field of vehicle oil supply systems, and particularly relates to a hybrid vehicle oil supply system and a vehicle.

Background

A hybrid vehicle refers to a vehicle that can be powered by at least two power sources. For gasoline-electric hybrid vehicles, it is currently common to include hybrid vehicles driven by gasoline and electricity and hybrid vehicles driven by methanol and electricity. For a hybrid vehicle powered by methanol and electricity, a vehicle typically includes a methanol engine and a methanol range extender engine. The methanol engine and the methanol range extender engine use methanol as fuel, and have the advantages of good discharge, low cost and the like; however, because methanol has large latent heat of vaporization at low temperature and poor evaporability, the concentration of combustible mixed gas is difficult to reach the ignition limit, and the low-temperature cold start of the methanol engine is difficult.

At present, the solutions for the difficulty in low-temperature cold start of an engine using methanol as a fuel mainly include an electric heating mode, a mode of injecting a starting liquid into an air inlet pipe, a gasoline auxiliary start mode, and other fuel auxiliary start modes.

Among them, the electric heating method is generally classified into an intake air heating method and a methanol heating method. The air inlet heating mode is that an electric heating grid is arranged in an air inlet pipe of the engine for heating or a glow plug and the like; the method is characterized in that air is heated by a heater or a glow plug and the like before the engine is started, and low-temperature intake airflow is heated to a required temperature by the heater or the glow plug when the engine is started, so that the methanol evaporation performance of methanol fuel sprayed by a methanol nozzle in an air inlet passage and the oil-gas mixing index in an engine combustion chamber are mainly improved, and the low-temperature cold starting performance of the methanol engine is improved; the methanol heating mode adopts a heating rod to heat methanol in an oil rail or a heating wire to heat methanol in an oil pipe, but because the heat conductivity coefficient of methanol is small, the heating effect is not obvious, and the methanol at a low temperature is heated to a required temperature for a long time.

the starting time of a cold starting mode of spraying starting liquid into the air inlet pipe is difficult to continue, and the starting effect is not obvious; although other cold starting modes of fuel-assisted starting are technically mature, the cost of parts and systems is high, and the development cost of automobile products is increased.

the auxiliary gasoline starting method has the advantages that the auxiliary gasoline starting effect is relatively good, gasoline is used as a traditional fuel, the evaporativity is good, the problem of difficulty in cold starting can be solved by firstly spraying gasoline for combustion, and after the water temperature of an engine reaches a certain temperature, the body of the engine is heated and then spraying methanol, meanwhile, the oiling is convenient, the technology of a gasoline fuel supply system is mature, the engineering implementation is strong, the project development period can be shortened, the product engineering is convenient, the product is rapidly pushed to the market, and the conventional auxiliary gasoline starting method generally has the following two common schemes:

1. The air inlet bent pipe is provided with a set of gasoline rail injector assembly, and gasoline is sprayed into the air inlet manifold when the air inlet bent pipe is cold started at low temperature. The number of the oil injectors is less than that of the cylinders, the oil injection pulse width is large, gasoline injected into a manifold is not easy to evaporate, the uniformity of each cylinder is not good, three cylinders and four cylinders are easy to submerge, and exhaust is dark and dense.

2. A set of gasoline rail injector assembly with an air inlet for multi-point injection is added, and the number of injectors is the same as the number of cylinders. The method has the disadvantages of high cost, difficult arrangement and high requirement on space.

Disclosure of Invention

Aiming at the technical problems in the background art, the invention provides an oil supply system for connecting two engines with the same set of first fuel supply system and the same set of second fuel supply system, the two sets of supply systems supply two kinds of fuel to the two engines by controlling a valve body and an oil pump, different fuels are supplied under different conditions according to requirements, the control is simple and convenient, and the cost is reduced.

The invention is realized by the following technical scheme:

The invention provides an oil supply system of a hybrid vehicle, which comprises a first engine, a second engine, a first fuel supply system and a second fuel supply system; the first fuel supply system comprises a first oil tank, the second fuel supply system comprises a second oil tank, and the first fuel supply system is used for supplying the first engine and/or the second engine with fuel in the first oil tank; the second fuel supply system is used for supplying the fuel in the second oil tank for the first engine and/or the second engine.

Further, the oil supply system further comprises an oil pump control unit, the first fuel supply system further comprises a first oil pump, the second fuel supply system further comprises a second oil pump, and the oil pump control unit is used for controlling whether the first oil pump and/or the second oil pump work or not.

Further, the oil supply system further comprises a first valve body, a second valve body and a valve body control unit, wherein the valve body control unit is used for controlling the opening and closing of the first valve body and/or the second valve body.

Further, the fuel in the first oil tank is methanol, and the fuel in the second oil tank is gasoline.

Further, the oil supply system further comprises a water temperature detection unit, wherein the water temperature detection unit is used for detecting the water temperatures of the first engine and the second engine and sending detection results to the oil pump control unit and the valve body control unit.

Further, the oil pump control unit is used for controlling whether the first oil pump and/or the second oil pump works or not according to the received detection result.

further, the valve body control unit is used for controlling the opening and closing of the first valve body and/or the second valve body according to the received detection result.

Further, the first fuel supply system further includes a first pressure regulating valve and a first filter; the first pressure regulating valve is used for regulating the working pressure of fuel oil in a methanol pipeline, and the first filter is used for filtering impurities in the methanol fuel; the second fuel supply system further comprises a second pressure regulating valve and a second filter; the second pressure regulating valve is used for regulating the working pressure of fuel oil in the gasoline pipeline, and the second filter is used for filtering impurities in the gasoline fuel.

Further, the first valve body and the second valve body adopt dual electromagnetic valves.

the invention also provides a vehicle, and the vehicle applies the oil supply system of the hybrid vehicle.

By adopting the technical scheme, the oil supply system of the hybrid vehicle provided by the invention has the following beneficial effects:

According to the invention, two engines of the same vehicle are connected with the same set of first fuel supply system and the same set of second fuel supply system, the two sets of supply systems supply two kinds of fuel to the two engines through controlling the valve body and the oil pump, different fuels are supplied under different conditions according to requirements, the control is simple and convenient, and the cost and the arrangement difficulty are reduced. When a methanol engine and a methanol range extender engine of a hybrid vehicle which take methanol and electricity as power sources are connected with the same methanol supply system and the same gasoline supply system, the methanol engine or the methanol range extender engine is supplied with gasoline at the low-temperature cold start through the control of a valve body and an oil pump, so that the disadvantages that the vaporization latent heat is large and the vaporization property is poor at the low temperature of the methanol, the concentration of combustible mixed gas is difficult to reach the ignition limit and the combustible mixed gas cannot be started are overcome, and when the temperature of the methanol engine or the methanol range extender engine reaches the temperature at which the methanol is beneficial to combustion, the gasoline supply to the methanol engine or the methanol range extender engine is cut off and the methanol is supplied.

drawings

in order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without inventive labor.

Fig. 1 is a schematic view of an oil supply system for a hybrid vehicle according to an embodiment of the present invention;

FIG. 2 is a flow chart of the selection of the operating mode of the methanol engine according to the embodiment of the invention.

FIG. 3 is a flow chart of a selected operating mode of the methanol range extender engine.

Wherein the reference numerals in the figures correspond to: 1-a first engine, 2-a second engine, 3-a first fuel supply system, 301-a first oil tank, 302-a first oil pump, 303-a first pressure regulating valve, 304-a first filter, 4-a second fuel supply system, 401-a second oil tank, 402-a second oil pump, 403-a second pressure regulating valve, 404-a second filter, 5-a first valve body, 501-a first oil inlet end, 502-a second oil inlet end, 503-a first oil outlet end, 6-a second valve body, 601-a third oil inlet end, 602-a fourth oil inlet end, 603-a second oil outlet end, 7-a first oil rail, 8-a second oil rail.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.

As shown in fig. 1, a hybrid vehicle oil supply system according to an embodiment of the present invention includes a first engine 1, a second engine 2, a first fuel supply system 3, a second fuel supply system 4, an oil pump control unit, a valve body control unit, a water temperature detection unit, a first valve body 5, a second valve body 6, a first oil rail 7, and a second oil rail 8.

In the embodiment of the present invention, the first fuel supply system 3 includes a first tank 301, a first oil pump 302, a first pressure regulating valve 303, and a first filter 304; the second fuel supply system 4 includes a second tank 401, a second oil pump 402, a second pressure regulating valve 403, and a second filter 404; it should be noted that the embodiment of the present invention does not limit the types of fuel in the first fuel tank 301 and the second fuel tank 401. The functions of each part are as follows:

The first oil pump 302 is used for establishing the pressure of the fuel in the first oil tank 301, sucking out the fuel in the first oil tank 301 and outputting the fuel to the first engine 1 and/or the second engine 2;

The first pressure regulating valve 303 is used for regulating the working pressure of fuel in the pipeline, when the working pressure of the fuel in the first pressure regulating valve 303 exceeds the working pressure of the pipeline, the fuel in the first oil tank 301 is not sucked out any more, and is not output to the first engine 1 and/or the second engine 2 any more;

The first filter 304 functions to filter foreign substances in the fuel in the first tank 301;

The second oil pump 402 is used for establishing the pressure of the fuel in the second oil tank 401, sucking out the fuel in the second oil tank 401 and outputting the fuel to the first engine 1 and/or the second engine 2;

The second pressure regulating valve 403 is used for regulating the working pressure of the fuel in the pipeline, when the working pressure of the fuel in the second pressure regulating valve 403 exceeds the working pressure of the pipeline, the fuel in the second fuel tank 401 is not sucked out any more, and is not output to the first engine 1 and/or the second engine 2 any more;

The second filter 404 functions to filter impurities in the fuel in the second tank 401;

In the embodiment of the present invention, the first valve body 5 includes a first oil inlet end 501, a second oil inlet end 502 and a first oil outlet end 503; the second valve body 6 comprises a third oil inlet end 601, a fourth oil inlet end 602 and a second oil outlet end 603; the first oil inlet end 501 and the third oil inlet end 601 are respectively communicated with the first fuel supply system 3, the first oil outlet end 503 is communicated with a first oil rail 7, and the first oil rail 7 is used for supplying the fuel output by the first oil outlet end 503 to the first engine 1; the second oil inlet end 502 and the fourth oil inlet end 602 are respectively communicated with the second fuel supply system 4, the second oil outlet end 603 is communicated with the second oil rail 8, and the second oil rail 8 is used for supplying the fuel output by the second oil outlet end 603 to the second engine 1. When the first engine 1 and the second engine 2 are not started, the first oil inlet end 501 and the second oil inlet end 502 of the first valve body 5 and the third oil inlet end 601 and the fourth oil inlet end 602 of the second valve body 6 are kept in a normally closed state. In the embodiment of the present invention, the first valve body 5 and the second valve body 6 both employ dual electromagnetic valves, the first oil inlet end 501 and the second oil inlet end 502 are inlets of two electromagnetic valves employed by the first valve body 5, respectively, and two outlets of two electromagnetic valves employed by the first valve body 5 are merged into one channel to form the first oil outlet end 503; the third oil inlet 601 and the fourth oil inlet 602 are inlets of two solenoid valves used by the second valve body 6, and two outlets of the two solenoid valves used by the second valve body 6 are merged into one channel to form the first oil outlet 603.

In the embodiment of the invention, the water temperature detection unit is used for detecting the water temperatures of the first engine 1 and the second engine 2 and sending the detection result to the oil pump control unit and the valve body control unit; the oil pump control unit sends an oil pump working instruction according to the received detection result, and the valve body control unit sends a valve body working instruction according to the received detection result; in a specific embodiment, the water temperature detection unit and the oil pump control unit are integrated in a vehicle VCU (vehicle electronic control unit), and the valve body control unit is integrated in an ECU (engine electronic control unit). The specific working mode is as follows:

1. The water temperature detection unit of the whole vehicle VCU detects the water temperature of the first engine 1 and sends the detection result to the oil pump control unit of the whole vehicle VCU and the first engine ECU, when the first engine is started, the whole vehicle VCU controls the starting of the first oil pump 302 or the second oil pump 402 according to the detection result, the first engine ECU controls the starting of the first oil inlet 501 or the second oil inlet 502, and then the fuel in the first oil tank 301 or the second oil tank 401 is supplied to the first engine 1.

2. the water temperature detection unit of the whole vehicle VCU detects the water temperature of the second engine 2 and sends the detection result to the oil pump control unit of the whole vehicle VCU and the second engine ECU, when the second engine is started, the whole vehicle VCU controls the starting of the first oil pump 302 or the second oil pump 402 according to the detection result, the second engine ECU controls the starting of the third oil inlet 601 or the fourth oil inlet 602, and then the fuel in the first oil tank 301 or the second oil tank 401 is supplied to the second engine 2.

The working mode of the oil supply system of the hybrid vehicle provided by the embodiment of the invention is as follows:

Operation mode for supplying the first engine 1 with fuel in the first tank 301: when the first oil pump 302 is operated, the first oil inlet 501 of the first valve body 5 is opened, the second oil inlet 502 of the first valve body 5 is closed, and the fuel in the first oil tank 301 enters the first engine 1 through the first oil rail 7.

Operation mode for supplying the first engine 1 with fuel in the second tank 401: the second oil pump 402 is operated, the second oil inlet 502 of the first valve body 5 is opened, the first oil inlet 501 of the first valve body 5 is closed, and the fuel in the second oil tank 302 enters the first engine 1 through the first oil rail 7.

Operating mode for supplying the second engine 2 with fuel in the first tank 301: when the first oil pump 302 works, the third oil inlet 601 of the second valve body 6 is opened, the fourth oil inlet 602 of the second valve body 6 is opened, and the fuel in the first oil tank 301 enters the second engine 2 through the second oil rail 8.

Operating mode for supplying the second engine 2 with fuel in the second tank 401: when the second oil pump 402 is operated, the fourth oil inlet 602 of the second valve body 6 is opened, the third oil inlet 601 of the second valve body 6 is opened, and the fuel in the second oil tank 401 enters the second engine 2 through the second oil rail 8.

the oil supply system of the hybrid vehicle provided by the embodiment of the invention can be switched to the four oil supply modes through artificially setting conditions.

In the embodiment of the invention, two engines of the same vehicle are connected with the same set of first fuel supply system and the same set of second fuel supply system, the two sets of supply systems supply two kinds of fuel to the two engines by controlling the valve body and the oil pump, different fuels are supplied under different conditions according to requirements, the control is simple and convenient, the cost is reduced, the learning cost of new users is reduced, and the arrangement difficulty is greatly reduced.

In a specific embodiment, methanol is filled in the first oil tank 301, gasoline is filled in the second oil tank 401, the first engine 1 is a methanol engine, the second engine 2 is a methanol range extender engine, the water temperature detection unit and the oil pump control unit are integrated in a vehicle VCU, and the valve body control unit is integrated in an ECU. The methanol range extender is integrated with the generator and used for charging the power battery and continuously supplying power to the power battery when the main driving force cannot meet the power requirement; the methanol engine provides main driving force for the vehicle, and when the main driving force cannot meet the power requirement of the vehicle, the methanol engine is assisted by the driving motor to provide power. The working mode is as follows:

methanol working mode of methanol engine: when the first oil pump 302 works, the first oil inlet end 501 of the first valve body 5 is opened, the second oil inlet end 502 of the first valve body 5 is closed, and the methanol in the first oil tank 301 enters the methanol engine through the first oil rail 7.

gasoline working mode when the methanol engine is cold started at low temperature: when the second oil pump 402 works, the second oil inlet 502 of the first valve body 5 is opened, the first oil inlet 501 of the first valve body 5 is closed, and the gasoline in the second oil tank 401 enters the methanol engine through the first oil rail 7.

The methanol working mode of the methanol range extender engine is as follows: when the first oil pump 302 works, the third oil inlet 601 of the second valve body 6 is opened, the fourth oil inlet 602 of the second valve body 6 is closed, and the methanol in the first oil tank 301 enters the methanol range extender engine through the second oil rail 8.

The gasoline working mode of the methanol range extender engine during low-temperature cold start is as follows: when the second oil pump 402 works, the fourth oil inlet 602 of the second valve body 6 is opened, the third oil inlet 601 of the second valve body 6 is closed, and the gasoline in the second oil tank 401 enters the methanol range extender engine through the second oil rail 8.

The working process is as follows:

As shown in fig. 2, a first preset temperature is set, and after the vehicle is powered on, the water temperature detection unit of the vehicle VCU detects the water temperature of the methanol engine and sends the detection result to the oil pump control unit of the vehicle VCU and the methanol engine ECU. If the VCU of the whole vehicle judges that the detection result is lower than the first preset temperature, the VCU of the whole vehicle controls to start the second oil pump 402 when the methanol engine is started; when the methanol engine ECU judges that the detection result is lower than the first preset temperature, the methanol engine ECU controls to open the second oil inlet end 502, and the methanol engine enters a gasoline working mode during the low-temperature cold start; after the methanol engine is started, the water temperature detection unit continuously detects the water temperature of the methanol engine and sends a detection result to an oil pump control unit of a complete vehicle VCU and a methanol engine ECU (electronic control unit), and when the complete vehicle VCU judges that the detection result is no longer lower than a first preset temperature, the complete vehicle VCU controls to close a second oil pump 402 and start a first oil pump 401; and when the methanol engine ECU judges that the detection result is no longer lower than the first preset temperature, the methanol engine ECU controls to close the second oil inlet end 502 and open the first oil inlet end 501, and the methanol engine enters the methanol working mode.

As shown in fig. 3, after the vehicle is powered on, the water temperature detection unit of the vehicle VCU detects the water temperature of the methanol range extender engine and sends the detection result to the oil pump control unit of the vehicle VCU and the methanol range extender engine ECU. If the whole vehicle VCU judges that the detection result is lower than the second preset temperature, the whole vehicle VCU controls to start the second oil pump 402 when the methanol range extender engine is started; when the methanol range extender engine ECU judges that the detection result is lower than a second preset temperature, the methanol range extender engine ECU controls to open a fourth oil inlet end 602, and the methanol range extender engine enters a gasoline working mode during the low-temperature cold start; after the methanol range extender engine is started, the water temperature detection unit continuously detects the water temperature of the methanol range extender engine and sends a detection result to an oil pump control unit of a complete vehicle VCU and an ECU (electronic control unit) of the methanol range extender engine, and when the complete vehicle VCU judges that the detection result is no longer lower than a second preset temperature, the complete vehicle VCU controls to close a second oil pump 402 and start a first oil pump 401; and when the methanol range extender engine ECU judges that the detection result is no longer lower than the second preset temperature, the methanol range extender engine ECU controls to close the fourth oil inlet end 602 and open the third oil inlet end 601, and the methanol range extender engine enters the methanol working mode.

In the embodiment of the invention, a methanol engine and a methanol range extender engine of a hybrid vehicle which take methanol and electricity as power sources are connected with the same methanol supply system and the same gasoline supply system, and gasoline is supplied when the methanol engine or the methanol range extender engine is cold started at low temperature by controlling a valve body and an oil pump, so that the disadvantages that the vaporization latent heat of the methanol is large and the evaporation property is poor at low temperature, so that the concentration of combustible mixed gas is difficult to reach the ignition limit and cannot be started are overcome, and when the temperature of the methanol engine or the methanol range extender engine reaches the temperature at which the methanol is beneficial to combustion, the gasoline supply to the methanol engine or the methanol range extender engine is cut off, and the methanol is supplied instead, so that the pollution is reduced, and the cost is reduced. The embodiment of the invention realizes the fuel supply of one set of fuel supply system to two engines, has simple and convenient control and low cost, reduces the learning cost of new users and greatly reduces the arrangement difficulty.

The embodiment of the invention also provides a vehicle, and the oil supply system of the hybrid vehicle provided by the embodiment of the invention is applied.

while the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.