Hybrid vehicle type power system using transmission power takeoff for air supply

Abstract

The invention discloses a hybrid vehicle type power system using a transmission power takeoff to supply air, which comprises a power unit, a hybrid transmission assembly connected with the power unit, an air path unit connected with the hybrid transmission assembly and an output unit connected with the hybrid transmission assembly, the hybrid transmission assembly adopts a P2 framework hybrid transmission assembly with a power takeoff; the P2 framework hybrid transmission assembly with the power takeoff comprises a motor, an automatic transmission and the power takeoff, the power takeoff is further connected with a gas circuit unit, the automatic transmission is further connected with an output unit, and the motor is further connected with a power unit. According to the hybrid vehicle type power system using the transmission power takeoff for air supply, the scheme that the transmission is provided with the power takeoff is adopted, the motor is used for driving the power takeoff of the transmission, and the power takeoff is used for driving the air path unit, so that the power unit is not started to inflate during long-time pure electric mode driving, and the purpose that the whole vehicle is more oil-saving is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicles, and in particular to a hybrid vehicle power system using a transmission power take-off for air supply. Background Art

[0002] With the development of the commercial vehicle market, hybrid models have become one of the key directions for the development of models of domestic OEMs. Because hybrid models can convert excess mechanical energy into electrical energy and store it when the engine is working, and use the motor to drive in pure electric mode during starting or low-speed driving, which is more fuel-efficient than pure fuel vehicles, the hybrid transmissions used have attracted attention in the market. Among the hybrid transmissions on the market, the P2 architecture hybrid transmission (i.e., the architecture with the motor after the clutch and before the transmission) has developed particularly well due to its simple structure, reliable performance, and high cost performance, and most OEMs adopt this technical route. When using this P2 architecture hybrid process, if the engine is not started when driving in pure electric mode, better fuel saving can be achieved.

[0003] However, commercial vehicles basically use pneumatic brakes and pneumatic shifting. Therefore, after driving in pure electric mode for a long time, the gas in the vehicle's gas tank will be consumed due to braking or shifting the transmission. When the air pressure in the gas tank is lower than the air pressure required for normal driving of the vehicle, the vehicle's control system will automatically start the engine and inflate the vehicle's gas tank at idle to ensure driving safety. Although the engine is started at this time, it only inflates the gas tank at idle and does not transmit power to the power system, but there is still fuel consumption, which will waste a large part of the energy overall. Therefore, how to solve the above problems and make the vehicle more fuel-efficient is a difficult point in the technical route of commercial vehicles using P2 architecture hybrid transmissions. Summary of the invention

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a hybrid vehicle power system that uses a transmission power take-off to supply air, thereby solving the problem in the prior art that the P2 architecture hybrid vehicle needs to frequently start the engine to drive the air compressor to inflate the vehicle's air tank during pure electric driving, resulting in energy waste.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions to achieve the above problems: a hybrid vehicle power system using a transmission power take-off to supply air, comprising a power unit, a hybrid transmission assembly connected to the power unit, an air circuit unit connected to the hybrid transmission assembly, and an output unit connected to the hybrid transmission assembly.

[0006] The hybrid transmission assembly adopts a P2 architecture hybrid transmission assembly with a power take-off.

[0007] The P2 architecture hybrid transmission assembly with a power take-off includes a motor, an automatic transmission connected to the motor, and a power take-off connected to the automatic transmission.

[0008] The power take-off is also connected to the air circuit unit, the automatic transmission is also connected to the output unit, and the motor is also connected to the power unit.

[0009] The present invention also has the following technical features:

[0010] The air circuit unit comprises an air pump, a drying tank, a vehicle air tank and a transmission-specific air tank which are connected in sequence by air circuits.

[0011] The air pump is connected to the power take-off device.

[0012] The transmission-specific gas tank is connected to the gas circuit of the P2 architecture hybrid transmission assembly with a power take-off.

[0013] The power unit comprises an engine and a clutch connected to the engine, and the clutch is connected to the motor.

[0014] The output unit comprises a transmission shaft and wheels mounted on the transmission shaft, and the transmission shaft is connected to an automatic transmission.

[0015] The vehicle gas tank is also connected to the brake system gas circuit.

[0016] Compared with the prior art, the present invention has the following technical effects:

[0017] (I) The present invention provides a hybrid vehicle power system that uses a transmission power take-off to supply air. The system adopts a transmission with a power take-off, uses an electric motor to drive the transmission power take-off, and drives the air circuit unit through the power take-off, so that when driving in pure electric mode for a long time, the power unit does not need to be started to pump air, thereby achieving the purpose of saving fuel for the entire vehicle.

[0018] (II) The present invention provides a hybrid vehicle power system that uses a transmission power take-off to supply air, which has a simple structure, is easy to operate, safe and reliable, and has strong adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the connection relationship in hybrid mode of a hybrid vehicle power system using a transmission power take-off to supply air according to the present invention.

[0020] Figure 2 This is a schematic diagram of the connection relationship in pure electric mode of a hybrid vehicle power system that uses a transmission power take-off to supply air.

[0021] Figure 3 It is a schematic diagram of the overall structure of the P2 architecture hybrid transmission assembly with a power take-off of the present invention.

[0022] Figure 4 It is a schematic diagram of the connection relationship of the prior art in hybrid mode.

[0023] Figure 5 It is a schematic diagram of the connection relationship of the prior art in pure electric mode.

[0024] Figure 6 This is a schematic diagram of the overall structure of the P2 architecture hybrid transmission assembly.

[0025] The meaning of each symbol in the accompanying drawings:

[0026] 1-Power unit, 2-P2 architecture hybrid transmission assembly with power take-off, 3-Air circuit unit, 4-Output unit, 5-Brake system, 6-Clutch housing.

[0027] 1-1-engine, 1-2-clutch.

[0028] 2-1-motor, 2-2-automatic transmission, 2-3-power take-off.

[0029] 3-1-air pump, 3-2-drying tank, 3-3-vehicle air tank, 3-4-transmission dedicated air tank.

[0030] 4-1-drive shaft, 4-2-wheel.

[0031] 7-internal combustion engine, 8-clutch, 9-electric motor, 10-automatic transmission, 11-transmission, 12-driving wheel, 13-air compressor, 14-drying gas tank, 15-main gas tank, 16-transmission gas tank, 17-brake, 18-clutch housing.

[0032] The specific contents of the present invention are further explained in detail below in conjunction with embodiments. DETAILED DESCRIPTION

[0033] Unless otherwise specified, all components and units in the present invention are components known in the prior art.

[0034] Specific embodiments of the present invention are given below. It should be noted that the present invention is not limited to the following specific embodiments, and all equivalent changes made on the basis of the technical solution of this application fall within the protection scope of the present invention.

[0035] Embodiment 1:

[0036] This embodiment provides a hybrid vehicle power system using a transmission power take-off to supply air, such as Figure 1 As shown, it includes a power unit 1, a hybrid transmission assembly connected to the power unit 1, an air circuit unit 3 connected to the hybrid transmission assembly, and an output unit 4 connected to the hybrid transmission assembly.

[0037] The hybrid transmission assembly adopts a P2 architecture hybrid transmission assembly 2 with a power take-off.

[0038] The P2 architecture hybrid transmission assembly 2 with a power take-off includes a motor 2-1, an automatic transmission 2-2 connected to the motor 2-1, and a power take-off 2-3 connected to the automatic transmission 2-2.

[0039] The power take-off 2 - 3 is also connected to the air circuit unit 3 .

[0040] The automatic transmission 2 - 2 is also connected to the output unit 4 .

[0041] The motor 2 - 1 is also connected to the power unit 1 .

[0042] This embodiment adopts the solution of using automatic transmission 2-2 with power take-off 2-3, uses motor 2-1 to drive power take-off 2-3, and drives air circuit unit 3 through power take-off 2-3, so that when driving in pure electric mode for a long time, the engine does not need to be started to inflate air circuit unit 3, thus achieving the purpose of making the whole vehicle more fuel-efficient.

[0043] As a preferred embodiment of this invention:

[0044] like Figure 1 As shown, the air circuit unit 3 includes an air pump 3-1, a drying tank 3-2, a vehicle air tank 3-3 and a transmission-specific air tank 3-4 which are connected in sequence.

[0045] The air pump 3-1 is connected to the power take-off 2-3.

[0046] The transmission-specific gas tank 3 - 4 is connected to the gas circuit of the P2 architecture hybrid transmission assembly 2 with a power take-off.

[0047] The hybrid vehicle gas circuit system designed in this patent will use a transmission with a power take-off solution, and the power take-off 2-3 will drive the air pump 3-1 to inflate the vehicle's gas tank 3-3, so that when driving in pure electric mode for a long time, the engine 1-1 does not need to be started to inflate the vehicle's gas tank 3-3.

[0048] As a preferred embodiment of this invention:

[0049] like Figure 1 As shown, the power unit 1 includes an engine 1-1 and a clutch 1-2 connected to the engine 1-1, and the clutch 1-2 is connected to the motor 2-1.

[0050] As a preferred embodiment of this invention:

[0051] like Figure 1As shown, the vehicle gas tank 3 - 3 is also connected to the brake system 5 gas circuit; the vehicle gas tank 3 - 3 supplies gas to the brake system 5 .

[0052] As a preferred embodiment of this invention:

[0053] like Figure 1 As shown, the output unit 4 includes a transmission shaft 4-1 and a wheel 4-2 mounted on the transmission shaft 4-1, and the transmission shaft 4-1 is connected to the automatic transmission 2-2.

[0054] The specific working process of the present invention is:

[0055] like Figure 1-Figure 3 As shown, this embodiment designs a vehicle air circuit control system that uses a transmission power take-off to supply air.

[0056] When the vehicle is in hybrid mode, the engine 1-1 provides power. This power is first transmitted to the motor 2-1 in the P2 architecture hybrid transmission assembly 2 with a power take-off through the clutch 1-2, and then to the automatic transmission 2-2. The automatic transmission 2-2 then transmits part of the power to the power take-off 2-3 to drive the air pump 3-1 to produce compressed air. The compressed air is dried by the drying tank 3-2 and stored in the vehicle gas tank 3-3. When the vehicle gas tank 3-3 is filled to the specified air pressure, part of the compressed air will be stored in the transmission-specific gas tank 3-4, which is used to realize the gear shifting and shifting functions of the automatic transmission 2-2 and the gear shifting operation of the power take-off 2-3; the other part of the compressed air will be used to realize the various functions of the vehicle's brake system 5.

[0057] When the vehicle is in pure electric mode, the clutch 1-2 is disconnected, the engine 1-1 does not provide power for the vehicle, and the motor 2-1 provides power for the vehicle. The motor 2-1 directly transmits power to the automatic transmission 2-2, and then to the power take-off 2-3, which drives the air pump 3-1 to generate compressed air. The subsequent process is the same as the hybrid mode.

[0058] In order to solve the problem that the existing P2 architecture hybrid models on the market need to frequently start the engine to drive the air compressor to inflate the vehicle's air tank during pure electric driving, the present invention improves the path for generating compressed air and uses a P2 architecture hybrid transmission with a power take-off to drive the air pump to solve this problem.

[0059] as follows Figure 4 The whole vehicle operation diagram of the hybrid mode of the P2 architecture hybrid vehicle model of the present invention is displayed.

[0060] When driving, the engine 1-1 provides power, and all of this power is transmitted to the P2 architecture hybrid transmission assembly 2 with a power take-off through the clutch 1-2 to provide power to the entire vehicle.

[0061] The power first passes through the motor 2-1 in the P2 architecture hybrid transmission assembly 2 with a power take-off. The motor 2-1 will choose to recover part of the power according to the vehicle's operating conditions and store it as electrical energy, or provide part of the power when the power provided by the engine is insufficient. After coupling this part of the power provided by the motor and the power transmitted by the engine, it is transmitted to the automatic transmission 2-2. The automatic transmission 2-2 then calculates and engages the appropriate gear according to the vehicle's operating conditions, and transmits the power to the transmission shaft 4-1 at the appropriate speed and torque. Finally, the transmission shaft 4-1 transmits the power to the wheels 4-2 to achieve vehicle travel.

[0062] During the driving process of the whole vehicle, the brake system 5 needs compressed air to realize the functions of braking, ABS, etc. The automatic transmission 2-2 in the P2 architecture hybrid transmission assembly 2 with a power take-off needs compressed air to realize gear engagement or shifting, and the power take-off 2-3 therein also needs compressed air to realize gear engagement. Therefore, the P2 architecture hybrid transmission assembly 2 with a power take-off transfers part of the power to the power take-off 2-3 to drive the air pump 3-1 to generate compressed air. The compressed air is dried by the drying tank 3-2 and stored in the vehicle gas tank 3-3. When the vehicle gas tank 3-3 is filled to the specified air pressure, part of the compressed air will be stored in the transmission-specific gas tank 3-4, which is used to realize the gear engagement and shifting functions of the automatic transmission 2-2 and the gear engagement operation of the power take-off 2-3. Another part of the compressed air will be used to realize the various functions of the brake system 5 of the whole vehicle.

[0063] as follows Figure 5 The whole vehicle operation diagram of the pure electric mode of the P2 architecture hybrid vehicle of the present invention is displayed.

[0064] When driving, the clutch 1-2 is disconnected, the engine 1-1 does not provide power for the vehicle, and the motor 2-1 provides power for the vehicle. The motor 2-1 directly transmits the power to the automatic transmission 2-2, and then the automatic transmission 2-2 calculates and engages the appropriate gear according to the operating conditions of the vehicle, and transmits the power to the drive shaft 4-1 at a suitable speed and torque. Finally, the drive shaft 4-1 transmits the power to the wheel 4-2 to realize the driving of the vehicle. During the driving of the pure electric vehicle, the brake system 5 also needs compressed air to realize the functions of braking, ABS, etc., and the automatic transmission 2-2 also needs compressed air to realize gear engagement or shifting. Since this power take-off 2-3 is installed on the intermediate shaft of the automatic transmission 2-2, as long as the motor 2-1 drives the automatic transmission 2-2 to rotate on one axis, and the power take-off 2-3 gear is engaged, this power take-off 2-3 can rotate for a long time, drive the air pump 3-1 to work, and generate compressed air all the time to ensure driving safety.

[0065] As shown in the above process, this design innovatively changes the compressed gas generation route. It no longer uses the technical route of the engine-driven air compressor, but uses the P2 architecture hybrid transmission assembly 2 with a power take-off and an air pump 3-1 to achieve the technical route of generating compressed gas, providing a new solution for the design of the vehicle's air circuit system for hybrid vehicles.

[0066] This design solves the problem that the current commercial vehicle P2 architecture hybrid model needs to frequently start the engine to inflate when driving in pure electric mode, so that the whole vehicle can only use the motor to drive the vehicle and inflate the gas tank in pure electric mode, reducing fuel consumption and achieving obvious fuel saving effect; at the same time, since the engine will not automatically start idling and inflate frequently, it also reduces the noise during pure electric driving, giving the driver a better driving experience. For vehicle manufacturers, the solution of the present invention does not increase the number of parts, and the cost of parts is basically the same, but the difficulty of production and assembly is reduced; at the same time, it innovates the use method of the P2 architecture hybrid transmission with a power take-off. The existing transmissions with a power take-off are mostly used in dump trucks, sweepers, sanitation vehicles, etc. Since they cannot use motors as power sources like P2 architecture hybrid transmissions, they cannot achieve the purpose of saving fuel by not using the engine to inflate. At present, this solution has been used and applied to our company's F6HA45B series hybrid products.

[0067] Comparative Example:

[0068] Most of the existing P2 architecture hybrid models on the market are pure fuel vehicles with P2 architecture hybrid transmissions and related accessories added. This technical route allows the entire vehicle to have a variety of power transmission forms.

[0069] like Figure 4 The whole vehicle operation diagram of the hybrid mode of the existing P2 architecture hybrid model is displayed.

[0070] When driving, the internal combustion engine 7 provides power, most of which is transmitted through the clutch 8 to the P2 architecture hybrid transmission assembly composed of the motor 9 and the automatic transmission 10 to provide power to the whole vehicle, and part of it is used to drive the air compressor 13 to provide compressed air to the whole vehicle. The power provided to the whole vehicle first passes through the motor 9 in the P2 architecture hybrid transmission assembly. The motor 9 will choose to recover part of the power according to the operating conditions of the whole vehicle and store it as electrical energy, or provide part of the power when the power provided by the engine is insufficient. After coupling this part of the power provided by the motor and the power transmitted by the engine, it is transmitted to the automatic transmission 10. Then, the automatic transmission 10 calculates and engages the appropriate gear according to the operating conditions of the whole vehicle, and transmits the power to the transmission 11 at the appropriate speed and torque. Finally, the transmission 11 transmits the power to the drive wheel 12 to realize the driving of the vehicle. During the driving process of the whole vehicle, the brake 17 needs compressed air to realize the functions of braking, ABS, etc., and the automatic transmission 10 needs compressed air to realize gear engagement or shifting. Therefore, the existing P2 architecture hybrid vehicle adopts the whole vehicle air supply solution of the traditional fuel vehicle, that is, a part of the power generated by the internal combustion engine 7 drives the air compressor 13 to generate compressed air. The compressed air is dried by the dry air tank 14 and stored in the main air tank 15. When the main air tank 15 is filled to the specified air pressure, a part of the compressed air will be stored in the transmission air tank 16 to realize the gear shifting and other functions of the automatic transmission 10; the other part of the compressed air will be used to realize the various functions of the vehicle's brake 17.

[0071] like Figure 5 The whole vehicle operation diagram of the existing P2 architecture hybrid model in pure electric mode is displayed.

[0072] When driving, the clutch 8 is disconnected, the internal combustion engine 7 does not provide power for the whole vehicle, and the motor 9 provides power for the whole vehicle. The motor 9 directly transmits the power to the automatic transmission 10, and then the automatic transmission 10 calculates and engages in the appropriate gear according to the operating conditions of the whole vehicle, and transmits the power to the transmission 11 at a suitable speed and torque. Finally, the transmission 11 transmits the power to the drive wheel 12 to realize the driving of the vehicle. During the driving process of the pure electric vehicle, the brake 17 also needs compressed air to realize the functions of braking, ABS, etc., and the automatic transmission 10 also needs compressed air to realize gear shifting or shifting. When the compressed air in the total gas tank 15 is consumed by operations such as braking or shifting due to long-term driving, so that the air pressure of the total gas tank 15 is lower than the normal working air pressure, in order to ensure driving safety, the whole vehicle will automatically force the internal combustion engine 7 to start, and the power generated by it in the idle state drives the air compressor 13 to generate compressed air to supply the P2 architecture hybrid transmission assembly and the brake 17. At this time, the engine does not actually do work for driving, and most of the work it does is dissipated and wasted in the form of heat energy. Only a small part of the work is used to drive the air compressor 13 to produce compressed air, which wastes a lot of energy and does not save fuel.

[0073] The above technical solutions are only preferred specific implementation methods of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be conceived by any technician familiar with the field within the technical scope disclosed by the present invention without creative work are all covered within the protection scope of the present invention.

Claims

1. A hybrid vehicle power system using a transmission power take-off for air supply, comprising a power unit (1), a hybrid transmission assembly connected to the power unit (1), an air circuit unit (3) connected to the hybrid transmission assembly, and an output unit (4) connected to the hybrid transmission assembly, characterized in that: The hybrid transmission assembly adopts a P2 architecture hybrid transmission assembly (2) with a power take-off; The P2 architecture hybrid transmission assembly (2) with a power take-off comprises a motor (2-1), an automatic transmission (2-2) connected to the motor (2-1), and a power take-off (2-3) connected to the automatic transmission (2-2); The power take-off (2-3) is also connected to the air circuit unit (3); The automatic transmission (2-2) is also connected to an output unit (4); The motor (2-1) is also connected to the power unit (1).

2. A hybrid vehicle power system using a transmission power take-off for air supply as claimed in claim 1, characterized in that: The air circuit unit (3) comprises an air pump (3-1), a drying tank (3-2), a vehicle air tank (3-3) and a transmission-specific air tank (3-4) which are connected in sequence by air circuits; The air pump (3-1) is power-connected to the power take-off device (2-3); The transmission-specific gas tank (3-4) is connected to the gas circuit of a P2-frame hybrid transmission assembly (2) with a power take-off.

3. A hybrid vehicle power system using a transmission power take-off for air supply as claimed in claim 1, characterized in that: The power unit (1) comprises an engine (1-1) and a clutch (1-2) connected to the engine (1-1), and the clutch (1-2) is connected to the motor (2-1).

4. A hybrid vehicle power system using a transmission power take-off for air supply as claimed in claim 1, characterized in that: The output unit (4) comprises a transmission shaft (4-1) and a wheel (4-2) mounted on the transmission shaft (4-1); the transmission shaft (4-1) is connected to an automatic transmission (2-2).

5. A hybrid vehicle power system using a transmission power take-off for air supply as claimed in claim 2, characterized in that: The vehicle gas tank (3-3) is also connected to the gas circuit of the brake system (5).

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