Vehicle driving mechanism, vehicle, control method, storage medium and electronic equipment

Abstract

The invention provides a vehicle driving mechanism, a vehicle, a control method, a storage medium and electronic equipment, the vehicle driving mechanism comprises a driving assembly, the driving assembly comprises a motor, an engine, an air inlet pipe and an air outlet pipe, the air inlet pipe communicates with an inlet of the engine, the air outlet pipe communicates with an outlet of the engine, and the motor is provided with a first heat exchange inlet and a first heat exchange outlet; the EGR assembly comprises an EGR pipe and an EGR heat exchanger, an inlet of the EGR pipe communicates with the gas outlet pipe, an outlet of the EGR pipe communicates with the gas inlet pipe, and the EGR heat exchanger is arranged on the EGR pipe and provided with a second heat exchange inlet and a second heat exchange outlet; the heat exchange assembly comprises a heat exchange pipe and a radiator arranged on the heat exchange pipe, the radiator is provided with a heat dissipation inlet and a heat dissipation outlet, the first heat exchange inlet and the second heat exchange inlet are both communicated with the heat dissipation outlet, and the first heat exchange outlet and the second heat exchange outlet are both communicated with the heat dissipation inlet. Through the technical scheme provided by the invention, the problem of engine fire in related technologies can be solved.

Description

Technical Field

[0001] This invention relates to the field of automotive technology, and more specifically, to a vehicle drive mechanism, a vehicle, a control method, a storage medium, and an electronic device. Background Technology

[0002] Exhaust Gas Recirculation (EGR) is a technology that returns a portion of the exhaust gases from the engine to the intake manifold, where they mix with fresh air and re-enter the cylinders. Automobile exhaust contains a large amount of polyatomic gases, such as CO2. These gases are non-combustible, but due to their high specific heat capacity, they absorb a significant amount of heat during combustion, lowering the peak combustion temperature of the air-fuel mixture in the cylinder and thus reducing NOx emissions. X To reduce emissions and improve engine emissions, EGR is widely used in today's automotive engines.

[0003] Structurally, EGR systems can be divided into internal and external EGR systems. Internal EGR systems reduce pumping losses and increase in-cylinder heat load; external EGR systems draw exhaust gas back into the system from the exhaust system, achieving thorough mixing of exhaust gas and fresh air. Based on the intake position before and after the turbocharger's power stroke, external EGR systems are further divided into high-pressure and low-pressure EGR systems: high-pressure EGR systems draw gas before the turbocharger, resulting in higher in-cylinder gas pressure; low-pressure EGR systems draw gas after the turbocharger, where some exhaust gas has already been discharged through the turbocharger bypass valve, resulting in lower in-cylinder pressure.

[0004] In related technologies, with the development of new energy technologies, most automotive turbocharged engines are equipped with both a low-pressure EGR system and an intercooler. The EGR gas entering the engine contains a certain amount of water vapor, resulting in a high water vapor content in the mixture of fresh air and EGR gas. When this mixture flows through the turbocharger, its temperature and pressure are increased. After passing through the intercooler, the temperature drops, and the water vapor in the mixture may condense into water droplets. As the temperature continues to decrease, the amount of condensate increases, and the water droplets adhere to the walls of the intake system. In this situation, if the engine transitions from a stable low-speed load condition to a high-speed load condition, the water droplets will enter the cylinder with the airflow. If the amount of water droplets is large, it is highly likely to cause engine misfire. Summary of the Invention

[0005] This invention provides a vehicle drive mechanism, a vehicle, a control method, a storage medium, and an electronic device to solve the problem of engine misfire in related technologies.

[0006] According to one aspect of the present invention, a vehicle drive mechanism is provided, comprising: a drive assembly including a motor, an engine, an intake pipe, and an exhaust pipe, the intake pipe being connected to the inlet of the engine, the exhaust pipe being connected to the outlet of the engine, and the motor having a first heat exchange inlet and a first heat exchange outlet; an EGR assembly including an EGR pipe and an EGR heat exchanger, the inlet of the EGR pipe being connected to the exhaust pipe, the outlet of the EGR pipe being connected to the intake pipe, and the EGR heat exchanger being disposed on the EGR pipe and having a second heat exchange inlet and a second heat exchange outlet; and a heat exchange assembly including a heat exchange pipe and a radiator disposed on the heat exchange pipe, the radiator having a heat dissipation inlet and a heat dissipation outlet, the first heat exchange inlet and the second heat exchange inlet both being connected to the heat dissipation outlet, and the first heat exchange outlet and the second heat exchange outlet both being connected to the heat dissipation inlet.

[0007] Furthermore, the heat exchange assembly also includes a flow regulating valve, which has a flow inlet and a motor flow outlet and an EGR flow outlet that are connected to the flow inlet. The motor flow outlet is connected to the first heat exchange inlet, and the EGR flow outlet is connected to the second heat exchange inlet.

[0008] Furthermore, the heat exchange tube includes a main circulation tube, a first branch tube, and a second branch tube. The radiator and the motor are both installed on the main circulation tube. The flow inlet and the motor flow outlet are both connected to the main circulation tube. The first end of the first branch tube is connected to the second heat exchange inlet, and the second end of the first branch tube is connected to the EGR flow outlet. The first end of the second branch tube is connected to the second heat exchange outlet, and the second end of the second branch tube is connected to the main circulation tube and located between the motor flow outlet and the second heat exchange inlet.

[0009] Furthermore, the heat exchange assembly also includes a switching valve and a heater. The heater has a heating inlet and a heating outlet. The switching valve has a switching inlet and a heat dissipation switching outlet and a heating switching outlet that can communicate with the switching inlet. The heater is installed on the heat exchange tube. The heat dissipation switching outlet and the heat dissipation inlet are connected. The heating switching outlet and the heating inlet are connected. Both the heat dissipation outlet and the heating outlet are connected with the switching inlet.

[0010] Furthermore, the heat exchange tube includes a main circulation tube and a third branch tube. The radiator and heater are both installed on the main circulation tube. The switching inlet and the heat dissipation switching outlet are both connected to the main circulation tube. The first end of the third branch tube is connected to the heating switching outlet, and the second end of the third branch tube is connected to the main circulation tube and located between the heat dissipation outlet and the heating inlet.

[0011] Furthermore, the heat exchange assembly also includes a circulation pump installed on the main circulation pipe, which is located downstream of the connection between the second end of the third branch pipe and the main circulation pipe.

[0012] Furthermore, the EGR pipe is angled, with its outlet higher than its inlet; and / or, a turbocharger is installed on the exhaust pipe, with the EGR pipe inlet located downstream of the turbocharger.

[0013] According to another aspect of the present invention, a vehicle is provided, the vehicle including the vehicle drive mechanism provided above.

[0014] According to another aspect of the present invention, a control method for a vehicle drive mechanism is provided. The control method is used to control the vehicle drive mechanism provided above. The control method includes: acquiring the temperature of the gas in the EGR pipeline of the vehicle drive mechanism and the temperature of the motor; adjusting the operating state of the switching valve of the vehicle drive mechanism and adjusting the operating state of the radiator or heater of the vehicle drive mechanism according to the temperature of the gas in the EGR pipeline and the temperature of the motor.

[0015] Furthermore, the steps of adjusting the working state of the switching valve of the vehicle drive mechanism and the working state of the radiator or heater of the vehicle drive mechanism according to the temperature of the gas in the EGR pipeline and the temperature of the motor include: connecting the switching inlet and the heat dissipation switching outlet of the switching valve, and disconnecting the switching inlet and the heating switching outlet of the switching valve to make the radiator work, and adjusting the working state of the flow regulating valve of the vehicle drive mechanism according to the temperature of the gas in the EGR pipeline and the temperature of the motor.

[0016] Furthermore, the steps for adjusting the operating state of the flow control valve of the vehicle drive mechanism include: connecting the flow inlet and EGR flow outlet of the flow control valve, and disconnecting the flow inlet and motor flow outlet of the flow control valve; or connecting the flow inlet and EGR flow outlet of the flow control valve, and connecting the flow inlet and motor flow outlet of the flow control valve.

[0017] Furthermore, the steps of adjusting the operating state of the switching valve of the vehicle drive mechanism and the operating state of the radiator or heater of the vehicle drive mechanism according to the temperature of the gas in the EGR pipeline and the temperature of the motor include: connecting the switching inlet and the heating switching outlet of the switching valve, and disconnecting the switching inlet and the heat dissipation switching outlet of the switching valve; and connecting the flow inlet and the EGR flow outlet of the flow regulating valve, and disconnecting the flow inlet and the motor flow outlet of the flow regulating valve according to the temperature of the gas in the EGR pipeline and the temperature of the motor.

[0018] Furthermore, the steps of adjusting the working state of the switching valve of the vehicle drive mechanism and the working state of the radiator or heater of the vehicle drive mechanism according to the temperature of the gas in the EGR pipeline and the temperature of the motor include: connecting the switching inlet and the heating switching outlet of the switching valve, and disconnecting the switching inlet and the heat dissipation switching outlet of the switching valve to make the heater work; connecting the flow inlet and the EGR flow outlet of the flow regulating valve, and disconnecting the flow inlet and the motor flow outlet of the flow regulating valve.

[0019] According to another aspect of the present invention, a computer storage medium is provided for storing a program, wherein the program, when running, controls the device where the computer storage medium is located to execute the control method of the vehicle drive mechanism provided above.

[0020] According to another aspect of the present invention, an electronic device is provided, including a memory and a processor, wherein the memory stores a computer program and the processor is configured to execute the control method of the vehicle drive mechanism provided above through the computer program.

[0021] According to the technical solution of this invention, the vehicle drive mechanism includes a drive assembly, an EGR assembly, and a heat exchange assembly. The EGR pipe guides the exhaust gas from the engine's outlet pipe into the engine's intake pipe, forming EGR intake air that mixes with fresh air. Simultaneously, when the motor is operating, the first heat exchange inlet of the motor is connected to the radiator's outlet, and the first heat exchange outlet of the motor is connected to the radiator's inlet, allowing the radiator to dissipate heat from the motor. The second heat exchange inlet of the EGR heat exchanger is connected to the radiator's outlet, and the second heat exchange outlet of the EGR heat exchanger is connected to the radiator's inlet, allowing the radiator to cool the medium in the EGR heat exchanger. This cooling medium then cools the exhaust gas in the EGR pipe, causing water vapor in the exhaust gas to precipitate out. This prevents moisture-containing exhaust gas from entering the intake pipe and then the engine, thus preventing engine misfire. Attached Figure Description

[0022] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0023] Figure 1 A schematic diagram of the structure of a vehicle drive mechanism provided according to an embodiment of the present invention is shown;

[0024] Figure 2 A further structural schematic diagram of a vehicle drive mechanism provided according to an embodiment of the present invention is shown.

[0025] The above figures include the following reference numerals:

[0026] 10. Drive assembly; 11. Motor; 111. First heat exchange inlet; 112. First heat exchange outlet; 12. Engine; 13. Intake pipe; 131. Air filter; 132. Compressor; 133. Intercooler; 1331. Cooling pipe; 1332. Intercooler radiator; 1333. Intercooler pump; 134. Throttle valve; 14. Exhaust pipe; 141. Turbocharger; 142. Catalytic converter; 143. Muffler; 15. Intake manifold;

[0027] 20. EGR assembly; 21. EGR tube; 22. EGR heat exchanger; 221. Second heat exchange inlet; 222. Second heat exchange outlet; 23. EGR valve;

[0028] 30. Heat exchanger assembly; 31. Heat exchanger tube; 311. Main circulation pipe; 312. First branch pipe; 313. Second branch pipe; 314. Third branch pipe; 32. Radiator; 321. Heat dissipation inlet; 322. Heat dissipation outlet; 33. Flow regulating valve; 331. Flow inlet; 332. Motor flow outlet; 333. EGR flow outlet; 34. Switching valve; 341. Switching inlet; 342. Heat dissipation switching outlet; 343. Heating switching outlet; 35. Heater; 351. Heating inlet; 352. Heating outlet; 36. Circulation pump. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0030] like Figure 1 and Figure 2As shown, Embodiment 1 of the present invention provides a vehicle drive mechanism, which includes a drive assembly 10, an EGR assembly 20, and a heat exchange assembly 30. The drive assembly 10 includes a motor 11, an engine 12, an intake pipe 13, and an exhaust pipe 14. The intake pipe 13 is connected to the inlet of the engine 12, and the exhaust pipe 14 is connected to the outlet of the engine 12. The motor 11 has a first heat exchange inlet 111 and a first heat exchange outlet 112. The EGR assembly 20 includes an EGR pipe 21 and an EGR heat exchanger 22. The inlet and outlet of the EGR pipe 21 are connected to the exhaust pipe 22. Pipe 14 is connected, the outlet of EGR pipe 21 is connected to the inlet pipe 13, EGR heat exchanger 22 is installed on EGR pipe 21 and has a second heat exchange inlet 221 and a second heat exchange outlet 222; heat exchange assembly 30 includes heat exchange pipe 31 and radiator 32 installed on heat exchange pipe 31. Radiator 32 has heat dissipation inlet 321 and heat dissipation outlet 322. The first heat exchange inlet 111 and the second heat exchange inlet 221 are both connected to heat dissipation outlet 322, and the first heat exchange outlet 112 and the second heat exchange outlet 222 are both connected to heat dissipation inlet 321.

[0031] According to the technical solution of the present invention, the vehicle drive mechanism includes a drive assembly 10, an EGR assembly 20 and a heat exchange assembly 30. The EGR pipe 21 can be used to guide the exhaust gas discharged from the exhaust pipe 14 of the engine 12 into the intake pipe 13 of the engine 12, thereby forming EGR intake and mixing with fresh air. Meanwhile, when the motor 11 is working, since the first heat exchange inlet 111 of the motor 11 is connected to the heat dissipation outlet 322 of the radiator 32, and the first heat exchange outlet 112 of the motor 11 is connected to the heat dissipation inlet 321 of the radiator 32, the radiator 32 can dissipate heat from the motor 11. The second heat exchange inlet 221 of the EGR heat exchanger 22 is connected to the heat dissipation outlet 322 of the radiator 32, and the second heat exchange outlet 222 of the EGR heat exchanger 22 is connected to the heat dissipation inlet 321 of the radiator 32, the radiator 32 can cool the medium in the EGR heat exchanger 22, thereby cooling the exhaust gas in the EGR pipe 21 and causing water vapor in the exhaust gas to precipitate out. This prevents the exhaust gas containing moisture from entering the intake pipe 13 and then entering the engine 12 through the intake pipe 13, thus preventing the engine 12 from misfired.

[0032] The vehicle drive mechanism provided in this embodiment is applied to a hybrid electric vehicle, and the EGR heat exchanger 22 uses the existing radiator 32 of the motor 11 for medium cooling.

[0033] In other embodiments, the EGR heat exchanger 22 and the motor 11 may be cooled by an additional radiator 32.

[0034] It should be noted that the motor 11 and the EGR heat exchanger 22 can be cooled and dissipated in series or in parallel. When using the parallel connection, the flow regulating valve 33 can be set to meet the heat dissipation requirements of various vehicles under various operating conditions.

[0035] like Figure 1 and Figure 2 As shown, the heat exchange assembly 30 also includes a flow regulating valve 33. The flow regulating valve 33 has a flow inlet 331 and a motor flow outlet 332 and an EGR flow outlet 333 that are connected to the flow inlet 331. The motor flow outlet 332 is connected to the first heat exchange inlet 111, and the EGR flow outlet 333 is connected to the second heat exchange inlet 221. The flow regulating valve 33 can regulate the flow rate of the medium in the motor 11 and the EGR heat exchanger 22, thereby ensuring that the motor 11 and the EGR heat exchanger 22 are at a suitable temperature under different vehicle operating conditions.

[0036] The motor 11 and EGR heat exchanger 22 can be connected in parallel by being installed on different pipelines. The flow rate of the medium in the motor 11 and EGR heat exchanger 22 can be adjusted independently. That is, the EGR heat exchanger 22 adjusts the heat through the newly added pipeline, without utilizing the existing heat dissipation pipeline of the motor 11.

[0037] like Figure 1 and Figure 2 As shown, the heat exchanger tube 31 includes a main circulation tube 311, a first branch tube 312, and a second branch tube 313. The radiator 32 and the motor 11 are both mounted on the main circulation tube 311. The flow inlet 331 and the motor flow outlet 332 are both connected to the main circulation tube 311. The first end of the first branch tube 312 is connected to the second heat exchange inlet 221, and the second end of the first branch tube 312 is connected to the EGR flow outlet 333. The first end of the second branch tube 313 is connected to the second heat exchange outlet 222, and the second end of the second branch tube 313 is connected to the main circulation tube 311 and located between the motor flow outlet 332 and the second heat exchange inlet 221. By using the aforementioned heat exchanger tube 31 and modifying the existing heat exchange piping of the motor 11, the radiator 32 can cool the medium in the EGR heat exchanger 22. This method has the advantages of simple structure and low modification cost.

[0038] In this embodiment, the main circulation pipe 311 is the original heat exchange pipe of the motor 11. The first branch pipe 312 and the second branch pipe 313 are respectively connected to the EGR heat exchanger 22, which are new pipes.

[0039] like Figure 1 and Figure 2As shown, the heat exchange assembly 30 also includes a switching valve 34 and a heater 35. The heater 35 has a heating inlet 351 and a heating outlet 352. The switching valve 34 has a switching inlet 341 and a heat dissipation switching outlet 342 and a heating switching outlet 343 that can communicate with the switching inlet 341. The heater 35 is installed on the heat exchange tube 31. The heat dissipation switching outlet 342 is connected to the heat dissipation inlet 321, the heating switching outlet 343 is connected to the heating inlet 351, and both the heat dissipation outlet 322 and the heating outlet 352 are connected to the switching inlet 341. The switching valve 34 can control the working state of the radiator 32 and the heater 35, allowing one of them to work. When the heater 35 is working, it can heat the medium in the motor 11 and the EGR heat exchanger 22. When the ambient temperature is low, it can ensure that the motor 11 works normally and reduce the precipitation of moisture in the EGR tube 21, preventing excessive moisture from being unable to be discharged from the EGR tube 21 in time.

[0040] like Figure 1 and Figure 2 As shown, the heat exchanger pipe 31 includes a main circulation pipe 311 and a third branch pipe 314. The radiator 32 and heater 35 are both mounted on the main circulation pipe 311. The switching inlet 341 and the heat dissipation switching outlet 342 are both connected to the main circulation pipe 311. The first end of the third branch pipe 314 is connected to the heating switching outlet 343, and the second end of the third branch pipe 314 is connected to the main circulation pipe 311 and located between the heat dissipation outlet 322 and the heating inlet 351. By modifying the existing heat exchanger piping of the motor 11 and adding the third branch pipe 314, the working piping of the radiator 32 can be cut off, making the radiator 32 non-working and the heater 35 working.

[0041] like Figure 1 As shown, the heat exchange assembly 30 also includes a circulation pump 36 disposed on the main circulation pipe 311. The circulation pump 36 is located downstream of the connection point between the second end of the third branch pipe 314 and the main circulation pipe 311. The circulation pump 36 enables the medium in the heat exchange pipe 31 to circulate, thereby achieving cooling or heating of the medium in the motor 11 and the EGR heat exchanger 22.

[0042] like Figure 1 As shown, the EGR pipe 21 is inclined, and the outlet of the EGR pipe 21 is higher than the inlet of the EGR pipe 21. By utilizing the gravity of the condensate water released from the exhaust gas, the condensate water can flow from the inlet of the EGR pipe 21 into the exhaust pipe 14 and be discharged from the exhaust pipe 14.

[0043] The EGR pipe 21 is also equipped with an EGR valve 23. By adjusting the opening of the EGR valve 23, the intake volume of exhaust gas can be controlled.

[0044] like Figure 1As shown, a turbocharger 141 is installed on the exhaust pipe 14, and the inlet of the EGR pipe 21 is located downstream of the turbocharger 141. By taking exhaust gas from the outlet of the turbocharger 141, a low-pressure EGR intake is formed, reducing the gas pressure entering the engine.

[0045] The exhaust pipe 14 is also equipped with a catalytic converter 142 and a muffler 143. The catalytic converter 142 is located between the turbocharger 141 and the inlet of the EGR pipe 21, and can convert harmful gases in the exhaust gas into harmless gases. The muffler is located downstream of the inlet of the EGR pipe 21, and can reduce exhaust noise.

[0046] like Figure 1 As shown, in the intake direction, an air filter 131, a compressor 132, an intercooler 133, and a throttle valve 134 are sequentially arranged on the intake pipe 13. The outlet of the EGR pipe 21 is located between the air filter 131 and the compressor 132. The intake pipe 13 is connected to each cylinder of the engine 12 through the intake manifold 15.

[0047] The intercooler 133 has a cooling pipe 1331, and an intercooler radiator 1332 and an intercooler pump 1333 are installed on the cooling pipe 1331.

[0048] Embodiment 2 of the present invention provides a vehicle, which includes the vehicle drive mechanism described above. When the motor 11 is working, since the first heat exchange inlet 111 of the motor 11 is connected to the heat dissipation outlet 322 of the radiator 32, and the first heat exchange outlet 112 of the motor 11 is connected to the heat dissipation inlet 321 of the radiator 32, the radiator 32 can dissipate heat from the motor 11. The second heat exchange inlet 221 of the EGR heat exchanger 22 is connected to the heat dissipation outlet 322 of the radiator 32, and the second heat exchange outlet 222 of the EGR heat exchanger 22 is connected to the heat dissipation inlet 321 of the radiator 32, the radiator 32 can cool the medium in the EGR heat exchanger 22, thereby cooling the exhaust gas in the EGR pipe 21 and causing water vapor in the exhaust gas to precipitate out. This prevents the exhaust gas containing moisture from entering the intake pipe 13 and then entering the engine 12 through the intake pipe 13, thereby preventing the engine 12 from misfired.

[0049] Embodiment 3 of the present invention provides a control method for a vehicle drive mechanism. This control method is used to control the aforementioned vehicle drive mechanism. The control method includes: S1, acquiring the temperature of the gas in the EGR pipe 21 of the vehicle drive mechanism and the temperature of the motor 11; S2, adjusting the operating state of the switching valve 34 of the vehicle drive mechanism based on the gas temperature in the EGR pipe 21 and the motor 11 temperature, thereby adjusting the operating state of the radiator 32 or heater 35 of the vehicle drive mechanism. By acquiring the gas temperature in the EGR pipe 21 and the motor 11 temperature, it is possible to determine whether the motor 11 is in its optimal operating state and to determine the amount of condensate precipitation in the EGR pipe 21. Based on the aforementioned gas temperature and motor 11 temperature, by controlling the connection state of the switching valve 34, the radiator 32 or heater 35 can be activated to adjust the temperature of the motor 11 and the gas temperature in the EGR pipe 21.

[0050] The step S2, which adjusts the operating state of the switching valve 34 of the vehicle drive mechanism and the operating state of the radiator 32 or heater 35 of the vehicle drive mechanism based on the temperature of the gas in the EGR pipe 21 and the temperature of the motor 11, includes: S21, connecting the switching inlet 341 and the heat dissipation switching outlet 342 of the switching valve 34, and disconnecting the switching inlet 341 and the heating switching outlet 343 of the switching valve 34, so that the radiator 32 is in the working state, and adjusting the operating state of the flow regulating valve 33 of the vehicle drive mechanism based on the temperature of the gas in the EGR pipe 21 and the temperature of the motor 11. By using the above steps, the radiator 32 can be in the working state to dissipate heat from the motor 11 and cool the gas in the EGR pipe 21, causing water in the exhaust gas to be expelled.

[0051] Alternatively, step S2, which adjusts the operating state of the switching valve 34 of the vehicle drive mechanism and the radiator 32 or heater 35 of the vehicle drive mechanism based on the temperature of the gas in the EGR pipe 21 and the temperature of the motor 11, includes: S22, connecting the switching inlet 341 and the heating switching outlet 343 of the switching valve 34, and disconnecting the switching inlet 341 and the heat dissipation switching outlet 342 of the switching valve 34 to put the heater 35 into operation; connecting the flow inlet 331 and the EGR flow outlet 333 of the flow regulating valve 33, and disconnecting the flow inlet 331 and the motor flow outlet 332 of the flow regulating valve 33. By using the above steps, the heater 35 can be put into operation to heat the medium in the motor 11 and the EGR heat exchanger 22. When the ambient temperature is low, the motor 11 can operate normally, and the precipitation of moisture in the EGR pipe 21 can be reduced.

[0052] Alternatively, step S2, which adjusts the operating state of the switching valve 34 of the vehicle drive mechanism and the radiator 32 or heater 35 of the vehicle drive mechanism based on the temperature of the gas in the EGR pipe 21 and the temperature of the motor 11, includes: S23, connecting the switching inlet 341 and the heating switching outlet 343 of the switching valve 34, and disconnecting the switching inlet 341 and the heat dissipation switching outlet 342 of the switching valve 34; and connecting the flow inlet 331 and the EGR flow outlet 333 of the flow regulating valve 33, and disconnecting the flow inlet 331 and the motor flow outlet 332 of the flow regulating valve 33, based on the temperature of the gas in the EGR pipe 21 and the temperature of the motor 11. Using these steps, both the radiator 32 and the heater 35 are in a non-operating state, and the EGR heat exchanger 22 and the motor 11 are connected in series, utilizing the heat exchange pipe 31 itself for cooling the EGR heat exchanger 22 and the motor 11. At this time, the exhaust gas temperature is moderate, requiring weak heat dissipation, and the motor 11 is in an operating state, requiring weak heat dissipation.

[0053] Specifically, step S21 of adjusting the operating state of the flow regulating valve 33 of the vehicle drive mechanism includes: S211, connecting the flow inlet 331 and the EGR flow outlet 333 of the flow regulating valve 33, and disconnecting the flow inlet 331 and the motor flow outlet 332 of the flow regulating valve 33. By employing the above steps, the EGR heat exchanger 22 and the motor 11 can be connected in series. At this time, the exhaust gas temperature is high, requiring strong heat dissipation, and the motor 11 is in operation, requiring heat dissipation.

[0054] Alternatively, step S21, which adjusts the operating state of the flow regulating valve 33 of the vehicle drive mechanism, includes: S212, connecting the flow inlet 331 and the EGR flow outlet 333 of the flow regulating valve 33, and connecting the flow inlet 331 and the motor flow outlet 332 of the flow regulating valve 33. By using the above steps, the EGR heat exchanger 22 and the motor 11 can be connected in parallel. At this time, the exhaust gas temperature is moderate, requiring weak heat dissipation, while the motor 11 is in operation and requires heat dissipation.

[0055] Embodiment 4 of the present invention provides a computer storage medium for storing a program. When the program runs, it controls the device containing the computer storage medium to execute the control method for the vehicle drive mechanism described above. Using this computer storage medium, when the ambient temperature is high, the radiator 32 can cool the medium in the EGR heat exchanger 22, thereby cooling the exhaust gas in the EGR pipe 21 and causing water vapor in the exhaust gas to precipitate. This prevents moisture-containing exhaust gas from entering the intake pipe 13 and then the engine 12, thus preventing engine misfire. When the ambient temperature is low, the heater 35 operates to heat the medium in the motor 11 and the EGR heat exchanger 22, reducing moisture precipitation in the EGR pipe 21 and preventing excessive moisture from failing to be discharged from the EGR pipe 21 in time. When the ambient temperature is moderate, the heat exchange pipe 31 itself cools the exhaust gas in the EGR pipe 21, causing water vapor in the exhaust gas to precipitate, thereby preventing moisture-containing exhaust gas from entering the intake pipe 13.

[0056] Embodiment 5 of the present invention provides an electronic device, including a memory and a processor. The memory stores a computer program, and the processor is configured to execute the control method for the vehicle drive mechanism provided above through the computer program. Using this electronic device, when the ambient temperature is high, the radiator 32 can cool the medium in the EGR heat exchanger 22, thereby cooling the exhaust gas in the EGR pipe 21 and causing water vapor in the exhaust gas to precipitate. This prevents moisture-containing exhaust gas from entering the intake pipe 13 and then the engine 12, thus preventing engine misfire. When the ambient temperature is low, the heater 35 operates to heat the medium in the motor 11 and the EGR heat exchanger 22, reducing moisture precipitation in the EGR pipe 21 and preventing excessive moisture from failing to be discharged from the EGR pipe 21 in time. When the ambient temperature is moderate, the heat exchange pipe 31 itself cools the exhaust gas in the EGR pipe 21, causing water vapor in the exhaust gas to precipitate, thereby preventing moisture-containing exhaust gas from entering the intake pipe 13.

[0057] The following description is based on specific embodiments of this application:

[0058] When engine 12 operates stably at 2200 rpm and 120 Nm, with an EGR rate of 18% (the optimal EGR rate), after 45 seconds of operation at this point, the outlet air temperature after the EGR heat exchanger is reduced to 46°C (3°C lower than the dew point temperature) by controlling the flow regulating valve 33 and the switching valve 34. Simultaneously, the intake air temperature after intercooler 133 is controlled at 26°C (2°C higher than the dew point temperature). Then, when engine 12 transiently switches from the 2200 rpm and 120 Nm operating point to the 2800 rpm and 170 Nm operating point, if the switching time is less than 10 seconds, the EGR valve 23 is closed; when engine 12 reaches the aforementioned operating point, the EGR valve 23 is reopened.

[0059] When engine 12 is running stably at 2800rpm and 170Nm, control EGR valve 23 to achieve the optimal EGR rate of 12%; at the same time, control the outlet air temperature after EGR heat exchanger to 53℃, which is 2℃ lower than the dew point temperature of 55℃ at this time, and control the temperature after intercooler to 31℃, which is 2℃ higher than the dew point temperature at this time.

[0060] When engine 1 operates stably at the operating point of 2200 rpm and 120 Nm, the engine intake temperature after intercooler 133 is reasonable due to the EGR cooling outlet temperature. Therefore, even if the engine operates stably at the operating point of 2200 rpm and 120 Nm for a long time, there is no obvious water droplet generated on the intake pipe after intercooler 133. This reduces the risk of misfire when the engine switches to 2800 rpm and 170 Nm. At the same time, since the EGR rate does not need to be reduced, the fuel consumption benefits brought by the higher EGR rate can be guaranteed. In addition, if the switching time is very short, the EGR valve 23 is closed to further avoid the possibility of misfire during transient switching.

[0061] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0062] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0063] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0064] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90° or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0065] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0066] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A vehicle drive mechanism, characterized in that, The vehicle drive mechanism includes: The drive assembly (10) includes a motor (11), an engine (12), an intake pipe (13), and an exhaust pipe (14). The intake pipe (13) is connected to the inlet of the engine (12), and the exhaust pipe (14) is connected to the outlet of the engine (12). The motor (11) has a first heat exchange inlet (111) and a first heat exchange outlet (112). EGR assembly (20) includes an EGR tube (21) and an EGR heat exchanger (22). The inlet of the EGR tube (21) is connected to the outlet pipe (14), and the outlet of the EGR tube (21) is connected to the inlet pipe (13). The EGR heat exchanger (22) is disposed on the EGR tube (21) and has a second heat exchange inlet (221) and a second heat exchange outlet (222). The heat exchange assembly (30) includes a heat exchange tube (31) and a radiator (32) disposed on the heat exchange tube (31). The radiator (32) has a heat dissipation inlet (321) and a heat dissipation outlet (322). The first heat exchange inlet (111) and the second heat exchange inlet (221) are both connected to the heat dissipation outlet (322), and the first heat exchange outlet (112) and the second heat exchange outlet (222) are both connected to the heat dissipation inlet (321).

2. The vehicle drive mechanism according to claim 1, characterized in that, The heat exchange assembly (30) further includes a flow regulating valve (33), which has a flow inlet (331) and a motor flow outlet (332) and an EGR flow outlet (333) that are connected to the flow inlet (331). The motor flow outlet (332) is connected to the first heat exchange inlet (111), and the EGR flow outlet (333) is connected to the second heat exchange inlet (221).

3. The vehicle drive mechanism according to claim 2, characterized in that, The heat exchange tube (31) includes a main circulation tube (311), a first branch tube (312), and a second branch tube (313). The radiator (32) and the motor (11) are both mounted on the main circulation tube (311). The flow inlet (331) and the motor flow outlet (332) are both connected to the main circulation tube (311). The first end of the first branch tube (312) is connected to the second heat exchange inlet (221), and the second end of the first branch tube (312) is connected to the EGR flow outlet (333). The first end of the second branch tube (313) is connected to the second heat exchange outlet (222), and the second end of the second branch tube (313) is connected to the main circulation tube (311) and located between the motor flow outlet (332) and the second heat exchange inlet (221).

4. The vehicle drive mechanism according to claim 2, characterized in that, The heat exchange assembly (30) further includes a switching valve (34) and a heater (35). The heater (35) has a heating inlet (351) and a heating outlet (352). The switching valve (34) has a switching inlet (341) and a heat dissipation switching outlet (342) and a heating switching outlet (343) that can communicate with the switching inlet (341). The heater (35) is disposed on the heat exchange tube (31). The heat dissipation switching outlet (342) is connected to the heat dissipation inlet (321). The heating switching outlet (343) is connected to the heating inlet (351). The heat dissipation outlet (322) and the heating outlet (352) are both connected to the switching inlet (341).

5. The vehicle drive mechanism according to claim 4, characterized in that, The heat exchange tube (31) includes a main circulation tube (311) and a third branch tube (314). The radiator (32) and the heater (35) are both disposed on the main circulation tube (311). The switching inlet (341) and the heat dissipation switching outlet (342) are both connected to the main circulation tube (311). The first end of the third branch tube (314) is connected to the heating switching outlet (343), and the second end of the third branch tube (314) is connected to the main circulation tube (311) and located between the heat dissipation outlet (322) and the heating inlet (351).

6. The vehicle drive mechanism according to claim 5, characterized in that, The heat exchange assembly (30) also includes a circulation pump (36) disposed on the main circulation pipe (311), the circulation pump (36) being located downstream of the connection between the second end of the third branch pipe (314) and the main circulation pipe (311).

7. The vehicle drive mechanism according to claim 1, characterized in that, The EGR pipe (21) is inclined, and the outlet of the EGR pipe (21) is higher than the inlet of the EGR pipe (21); and / or, A turbocharger (141) is provided on the exhaust pipe (14), and the inlet of the EGR pipe (21) is located downstream of the turbocharger (141).

8. A vehicle, characterized in that, The vehicle includes the vehicle drive mechanism as described in any one of claims 1 to 7.

9. A control method for a vehicle drive mechanism, characterized in that, The control method for the vehicle drive mechanism is used to control the vehicle drive mechanism according to any one of claims 4 to 6, the control method comprising: The temperature of the gas in the EGR pipe (21) of the vehicle drive mechanism and the temperature of the motor (11) are obtained. Based on the temperature of the gas in the EGR pipe (21) and the temperature of the motor (11), the working state of the switching valve (34) of the vehicle drive mechanism is adjusted, and the working state of the radiator (32) or heater (35) of the vehicle drive mechanism is adjusted.

10. The control method according to claim 9, characterized in that, The steps of adjusting the working state of the switching valve (34) of the vehicle drive mechanism and the working state of the radiator (32) or heater (35) of the vehicle drive mechanism according to the temperature of the gas in the EGR pipe (21) and the temperature of the motor (11) include: Connect the switching inlet (341) and the heat dissipation switching outlet (342) of the switching valve (34), and disconnect the switching inlet (341) and the heating switching outlet (343) of the switching valve (34) to make the radiator (32) work, and adjust the working state of the flow regulating valve (33) of the vehicle drive mechanism according to the temperature of the gas in the EGR pipe (21) and the temperature of the motor (11).

11. The control method according to claim 10, characterized in that, The steps for adjusting the operating state of the flow regulating valve (33) of the vehicle drive mechanism include: Connect the flow inlet (331) and EGR flow outlet (333) of the flow regulating valve (33), and disconnect the flow inlet (331) and motor flow outlet (332) of the flow regulating valve (33); or, Connect the flow inlet (331) and EGR flow outlet (333) of the flow regulating valve (33), and connect the flow inlet (331) and motor flow outlet (332) of the flow regulating valve (33).

12. The control method according to claim 9, characterized in that, The steps of adjusting the working state of the switching valve (34) of the vehicle drive mechanism and the working state of the radiator (32) or heater (35) of the vehicle drive mechanism according to the temperature of the gas in the EGR pipe (21) and the temperature of the motor (11) include: Connect the switching inlet (341) and heating switching outlet (343) of the switching valve (34), and disconnect the switching inlet (341) and heat dissipation switching outlet (342) of the switching valve (34). Based on the temperature of the gas in the EGR pipeline (21) and the temperature of the motor (11), connect the flow inlet (331) and EGR flow outlet (333) of the flow regulating valve (33) of the vehicle drive mechanism, and disconnect the flow inlet (331) and motor flow outlet (332) of the flow regulating valve (33).

13. The control method according to claim 9, characterized in that, The steps of adjusting the working state of the switching valve (34) of the vehicle drive mechanism and the working state of the radiator (32) or heater (35) of the vehicle drive mechanism according to the temperature of the gas in the EGR pipe (21) and the temperature of the motor (11) include: Connect the switching inlet (341) and heating switching outlet (343) of the switching valve (34), and disconnect the switching inlet (341) and heat dissipation switching outlet (342) of the switching valve (34) to make the heater (35) work. Connect the flow inlet (331) and EGR flow outlet (333) of the flow regulating valve (33), and disconnect the flow inlet (331) and motor flow outlet (332) of the flow regulating valve (33).

14. A computer storage medium, characterized in that, The computer storage medium is used to store a program, wherein the program, when running, controls the device where the computer storage medium is located to execute the control method of the vehicle drive mechanism as described in any one of claims 9 to 13.

15. An electronic device comprising a memory and a processor, characterized in that, The memory stores a computer program, and the processor is configured to execute the control method of the vehicle drive mechanism according to any one of claims 9 to 13 through the computer program.

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