A control system and control method for a hybrid vehicle

Abstract

The present invention discloses a control system and control method for a hybrid vehicle, which relates to the technical field of vehicle steering air supply control, and includes: an air compressor steering pump assembly, an accumulator, a dryer, a first clutch, a second clutch and a vehicle controller, wherein the air compressor steering pump assembly includes a coaxially connected air compressor and a steering pump; the vehicle controller is configured to: determine whether it is necessary to pump air into the air supply system or charge the accumulator according to the current driving mode of the vehicle, the actual outlet pressure of the dryer and the actual storage pressure of the accumulator; if so, control the first clutch to engage and the second clutch to disengage, or control the first clutch to disengage and the second clutch to engage according to the current driving mode of the vehicle and the working state of the engine and the motor; if not, control both the first clutch and the second clutch to disengage. While satisfying the steering and air supply functions of the hybrid vehicle, the present invention has a more compact structure and lower cost.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle steering air supply control, and in particular to a control system and a control method for a hybrid vehicle. Background Art

[0002] At present, some systems and components of commercial hybrid vehicles need to use high-pressure gas as the gas source, such as the brake system, air suspension, airbag seat, air horn, etc. In addition, commercial hybrid vehicles generally need to be equipped with power steering.

[0003] In the prior art, see Figure 1 As shown, the control system of the existing hybrid vehicle is equipped with a mechanical steering pump, an electric steering pump, a mechanical air compressor and an electric air compressor to meet the steering and air supply requirements. However, such an arrangement will result in a non-compact vehicle layout space and high cost. Summary of the invention

[0004] The embodiments of the present invention provide a control system and a control method for a hybrid vehicle to solve the technical problem in the related art that the control system of the existing hybrid vehicle is provided with a mechanical steering pump, an electric steering pump, a mechanical air compressor and an electric air compressor to meet the steering and air supply requirements, resulting in a non-compact vehicle layout space and high cost.

[0005] In a first aspect, a control system for a hybrid vehicle is provided, comprising:

[0006] An air compressor steering pump assembly, which includes an air compressor and a steering pump connected coaxially;

[0007] an accumulator in communication with an outlet of the steering pump;

[0008] a dryer connected to an outlet of the air compressor;

[0009] A first clutch connected to an output shaft of the engine and an input shaft of the air compressor steering pump assembly;

[0010] The second clutch is connected to the output shaft of the motor and the input shaft of the air compressor steering pump assembly

[0011] The vehicle controller is configured as follows:

[0012] According to the current driving mode of the vehicle, the actual outlet pressure of the dryer and the actual storage pressure of the accumulator, it is determined whether it is necessary to inflate the air supply system or charge the accumulator;

[0013] If yes, according to the current driving mode of the vehicle and the working states of the engine and the motor, the first clutch is controlled to be engaged and the second clutch is controlled to be disengaged, or the first clutch is controlled to be disengaged and the second clutch is controlled to be engaged;

[0014] If not, the first clutch and the second clutch are controlled to be disengaged.

[0015] In some embodiments, judging whether it is necessary to pump air into the air supply system or charge the accumulator according to the current driving mode of the vehicle, the actual outlet pressure of the dryer, and the actual storage pressure of the accumulator includes:

[0016] Get the vehicle's driving mode;

[0017] When the vehicle is in pure fuel mode, hybrid mode or pure electric mode, the opening pressure and unloading pressure of the dryer are set to P1 and P2 respectively, and the opening pressure and unloading pressure of the accumulator are set to PA and PB respectively; when the vehicle is in energy recovery mode, the opening pressure and unloading pressure of the dryer are set to P2 and P3 respectively, and the opening pressure and unloading pressure of the accumulator are set to PB and PC respectively; wherein, P1<P2<P3, PA<PB<PC;

[0018] Determine whether the actual outlet pressure of the dryer is lower than the opening pressure of the dryer or determine whether the actual storage pressure of the accumulator is lower than the opening pressure of the accumulator;

[0019] If so, it is determined that it is necessary to pump air into the air supply system or charge the accumulator.

[0020] In some embodiments, if so, controlling the first clutch to engage and the second clutch to disengage, or controlling the first clutch to disengage and the second clutch to engage according to the current driving mode of the vehicle and the working states of the engine and the motor, includes:

[0021] Determine whether the engine and motor are working properly:

[0022] If so, the first clutch is controlled to engage and the second clutch is controlled to disengage until the actual outlet pressure of the dryer reaches the unloading pressure of the dryer or the actual storage pressure of the accumulator reaches the unloading pressure of the accumulator; or the first clutch is controlled to disengage and the second clutch is controlled to engage until the actual outlet pressure of the dryer reaches the unloading pressure of the dryer or the actual storage pressure of the accumulator reaches the unloading pressure of the accumulator.

[0023] In some embodiments, after determining whether the engine and the motor are both operating normally, the method further includes:

[0024] If not, obtain the driving mode of the vehicle;

[0025] When the vehicle is in pure fuel mode or hybrid mode and the motor is abnormal, the first clutch is controlled to engage and the second clutch is controlled to disengage until the actual outlet pressure of the dryer reaches the unloading pressure of the dryer or the actual storage pressure of the accumulator reaches the unloading pressure of the accumulator;

[0026] When the vehicle is in pure electric mode or energy recovery mode and the engine is abnormal, the first clutch is controlled to disengage and the second clutch is controlled to engage until the actual outlet pressure of the dryer reaches the unloading pressure of the dryer or the actual storage pressure of the accumulator reaches the unloading pressure of the accumulator.

[0027] In some embodiments, after determining whether the actual outlet pressure of the dryer is lower than the opening pressure of the dryer or determining whether the actual storage pressure of the accumulator is lower than the opening pressure of the accumulator, the method further includes:

[0028] If the actual outlet pressure of the dryer is lower than the opening pressure of the dryer and the actual storage pressure of the accumulator is not lower than the opening pressure of the accumulator, the opening pressure and the unloading pressure of the accumulator are adjusted, and the accumulator is charged while pumping air into the air supply system;

[0029] If the actual outlet pressure of the dryer is not lower than the opening pressure of the dryer and the actual storage pressure of the accumulator is lower than the opening pressure of the accumulator, adjust the opening pressure and unloading pressure of the dryer, and pump air into the air supply system while charging the accumulator.

[0030] In some embodiments, the air compressor steering pump assembly further includes:

[0031] A water pump is coaxially connected to the air compressor and the steering pump. The water pump is also connected to a water tank and a radiator to form a circulation loop, and the circulation loop is used to cool the air compressor steering pump assembly.

[0032] In a second aspect, a control method for a hybrid vehicle is provided, comprising the following steps:

[0033] According to the current driving mode of the vehicle, the actual outlet pressure of the dryer and the actual storage pressure of the accumulator, it is determined whether it is necessary to pump air into the air supply system or charge the accumulator;

[0034] If yes, according to the current driving mode of the vehicle and the working states of the engine and the motor, the first clutch is controlled to engage and the second clutch is controlled to disengage, or the first clutch is controlled to disengage and the second clutch is controlled to engage;

[0035] If not, both the first clutch and the second clutch are controlled to be disengaged.

[0036] In some embodiments, judging whether it is necessary to pump air into the air supply system or charge the accumulator according to the current driving mode of the vehicle, the actual outlet pressure of the dryer, and the actual storage pressure of the accumulator includes:

[0037] Get the vehicle's driving mode;

[0038] When the vehicle is in pure fuel mode, hybrid mode or pure electric mode, the opening pressure and unloading pressure of the dryer are set to P1 and P2 respectively, and the opening pressure and unloading pressure of the accumulator are set to PA and PB respectively; when the vehicle is in energy recovery mode, the opening pressure and unloading pressure of the dryer are set to P2 and P3 respectively, and the opening pressure and unloading pressure of the accumulator are set to PB and PC respectively; wherein, P1<P2<P3, PA<PB<PC;

[0039] Determine whether the actual outlet pressure of the dryer is lower than the opening pressure of the dryer or whether the actual storage pressure of the accumulator is lower than the opening pressure of the accumulator;

[0040] If so, it is determined that it is necessary to pump air into the air supply system or charge the accumulator.

[0041] In some embodiments, if the first clutch is engaged and the second clutch is disengaged, or the first clutch is disengaged and the second clutch is engaged, according to the current driving mode of the vehicle and the working states of the engine and the motor, the method comprises:

[0042] Determine whether the engine and motor are working properly:

[0043] If so, the first clutch is controlled to engage and the second clutch is controlled to disengage until the actual outlet pressure of the dryer reaches the unloading pressure of the dryer or the actual storage pressure of the accumulator reaches the unloading pressure of the accumulator; or the first clutch is controlled to disengage and the second clutch is controlled to engage until the actual outlet pressure of the dryer reaches the unloading pressure of the dryer or the actual storage pressure of the accumulator reaches the unloading pressure of the accumulator;

[0044] If not, obtain the driving mode of the vehicle;

[0045] When the vehicle is in pure fuel mode or hybrid mode and the motor is abnormal, the first clutch is controlled to engage and the second clutch is controlled to disengage until the actual outlet pressure of the dryer reaches the unloading pressure of the dryer or the actual storage pressure of the accumulator reaches the unloading pressure of the accumulator;

[0046] When the vehicle is in pure electric mode or energy recovery mode and the engine is abnormal, the first clutch is controlled to disengage and the second clutch is controlled to engage until the actual outlet pressure of the dryer reaches the unloading pressure of the dryer or the actual storage pressure of the accumulator reaches the unloading pressure of the accumulator.

[0047] In some embodiments, after determining whether the actual outlet pressure of the dryer is lower than the opening pressure of the dryer or determining whether the actual storage pressure of the accumulator is lower than the opening pressure of the accumulator, the method further includes:

[0048] If the actual outlet pressure of the dryer is lower than the opening pressure of the dryer and the actual storage pressure of the accumulator is not lower than the opening pressure of the accumulator, adjust the opening pressure and unloading pressure of the accumulator, and charge the accumulator while pumping air into the air supply system;

[0049] If the actual outlet pressure of the dryer is not lower than the opening pressure of the dryer and the actual storage pressure of the accumulator is lower than the opening pressure of the accumulator, adjust the opening pressure and unloading pressure of the dryer, and pump air into the air supply system while charging the accumulator.

[0050] The beneficial effects brought about by the technical solution provided by the present invention include:

[0051] The embodiment of the present invention provides a control system and control method for a hybrid vehicle, wherein the control system is provided with an air compressor steering pump assembly, an accumulator, a dryer, a first clutch, a second clutch and a vehicle controller, wherein the air compressor steering pump assembly integrates the air compressor and the steering pump, and obtains the power of the engine or the motor through the first clutch and the second clutch to inflate the air supply system or charge the accumulator. While satisfying the steering and air supply functions of the hybrid vehicle, the present invention has a more compact structure and lower cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0053] Figure 1 A principle block diagram of a control system of an existing hybrid vehicle;

[0054] Figure 2 A principle block diagram of a control system of a hybrid vehicle provided by an embodiment of the present invention;

[0055] Figure 3 A flow chart of a control method for a hybrid vehicle provided by an embodiment of the present invention;

[0056] Figure 4 A flow chart of implementing step S10 of a control method for a hybrid vehicle provided by an embodiment of the present invention;

[0057] Figure 5A flow chart of implementing step S20 of a control method for a hybrid vehicle provided by an embodiment of the present invention;

[0058] Figure 6 Another flow chart of implementing step S10 of a hybrid vehicle control method provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0059] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0060] An embodiment of the present invention provides a control system for a hybrid vehicle, which can solve the technical problem that the control system of the existing hybrid vehicle is equipped with a mechanical steering pump, an electric steering pump, a mechanical air compressor and an electric air compressor to meet the steering and air supply requirements, resulting in a non-compact vehicle layout space and high costs.

[0061] See also Figure 2 As shown, an embodiment of the present invention provides a control system for a hybrid vehicle, including: an air compressor steering pump assembly, an accumulator, a dryer, a first clutch, a second clutch and a vehicle controller.

[0062] The air compressor steering pump assembly comprises an air compressor and a steering pump which are coaxially connected, the accumulator is communicated with an outlet of the steering pump, and the dryer is communicated with an outlet of the air compressor.

[0063] The first clutch is connected to the output shaft of the engine and the input shaft of the air compressor steering pump assembly. The second clutch is connected to the output shaft of the motor and the input shaft of the air compressor steering pump assembly.

[0064] The vehicle controller is configured as follows:

[0065] According to the current driving mode of the vehicle, the actual outlet pressure of the dryer and the actual storage pressure of the accumulator, it is determined whether it is necessary to inflate the air supply system or charge the accumulator;

[0066] If yes, according to the current driving mode of the vehicle and the working states of the engine and the motor, the first clutch is controlled to be engaged and the second clutch is controlled to be disengaged, or the first clutch is controlled to be disengaged and the second clutch is controlled to be engaged;

[0067] If not, the first clutch and the second clutch are controlled to be disengaged.

[0068] See also Figure 2 As shown, the embodiment of the present invention integrates the air compressor and the steering pump into an assembly structure, and simultaneously provides a first clutch and a second clutch, wherein the first clutch and the second clutch respectively connect the air compressor steering pump assembly to the engine and the motor of the hybrid vehicle. Figure 3 As shown, the embodiment of the present invention also determines whether the vehicle needs to pump air into the air supply system or charge the accumulator according to the current driving mode of the vehicle, the actual outlet pressure of the dryer and the actual storage pressure of the accumulator. When there is a demand, the first clutch and the second clutch are controlled to operate according to a preset rule to pump air into the air supply system of the vehicle or charge the accumulator. When there is no demand, the first clutch and the second clutch are controlled to separate to save energy. Figure 2 As shown, a pressure sensor can be arranged on the accumulator to obtain the actual storage pressure of the accumulator, and an air pressure sensor can be arranged at the outlet of the dryer to obtain the actual outlet pressure of the dryer.

[0069] The control system of the hybrid vehicle in the embodiment of the present invention is provided with an air compressor steering pump assembly, an accumulator, a dryer, a first clutch, a second clutch and a vehicle controller, wherein the air compressor steering pump assembly integrates the air compressor and the steering pump, and obtains the power of the engine or the motor through the first clutch and the second clutch to pump air into the air supply system or charge the accumulator. While meeting the steering and air supply functions of the hybrid vehicle, the present invention has a more compact structure and lower cost.

[0070] As an optional implementation, in an embodiment of the invention, see Figure 4 As shown, judging whether it is necessary to pump air into the air supply system or charge the accumulator according to the current driving mode of the vehicle, the actual outlet pressure of the dryer and the actual storage pressure of the accumulator includes:

[0071] Get the vehicle's driving mode.

[0072] When the vehicle is in pure fuel mode, hybrid mode or pure electric mode, the opening pressure and unloading pressure of the dryer are set to P1 and P2 respectively, and the opening pressure and unloading pressure of the accumulator are set to PA and PB respectively; when the vehicle is in energy recovery mode, the opening pressure and unloading pressure of the dryer are set to P2 and P3 respectively, and the opening pressure and unloading pressure of the accumulator are set to PB and PC respectively; wherein, P1<P2<P3, PA<PB<PC. Among them, the dryer and accumulator can be semi-electronically controlled, and the corresponding opening pressure and unloading pressure can be adjusted in real time through the vehicle controller.

[0073] It is determined whether the actual outlet pressure of the dryer is lower than the opening pressure of the dryer or whether the actual storage pressure of the accumulator is lower than the opening pressure of the accumulator.

[0074] If so, it is determined that it is necessary to pump air into the air supply system or charge the accumulator.

[0075] Through the above settings, part of the kinetic energy released during the vehicle deceleration in the energy recovery mode can be effectively used to inflate the air supply system. Taking the accumulator as an example, in the pure fuel mode, hybrid mode or pure electric mode, the accumulator energy only needs to be charged to 90% to meet normal needs, and the remaining 10% is charged in the energy recovery mode. In the energy recovery mode, it can be charged to 100% to effectively recycle the energy.

[0076] As an optional implementation, in an embodiment of the invention, see Figure 5 As shown, if so, according to the current driving mode of the vehicle and the working states of the engine and the motor, controlling the first clutch to engage and the second clutch to disengage, or controlling the first clutch to disengage and the second clutch to engage, comprises:

[0077] Determine whether the engine and motor are working properly:

[0078] If so, the first clutch is controlled to engage and the second clutch is controlled to disengage until the actual outlet pressure of the dryer reaches the unloading pressure of the dryer or the actual storage pressure of the accumulator reaches the unloading pressure of the accumulator; or the first clutch is controlled to disengage and the second clutch is controlled to engage until the actual outlet pressure of the dryer reaches the unloading pressure of the dryer or the actual storage pressure of the accumulator reaches the unloading pressure of the accumulator. When both the engine and the motor are working normally, the power source can be selected arbitrarily.

[0079] If not, obtain the driving mode of the vehicle;

[0080] When the vehicle is in pure fuel mode or hybrid mode and the motor is abnormal, the first clutch is controlled to engage and the second clutch is controlled to disengage until the actual outlet pressure of the dryer reaches the unloading pressure of the dryer or the actual storage pressure of the accumulator reaches the unloading pressure of the accumulator;

[0081] When the vehicle is in pure electric mode or energy recovery mode and the engine is abnormal, the first clutch is controlled to disengage and the second clutch is controlled to engage until the actual outlet pressure of the dryer reaches the unloading pressure of the dryer or the actual storage pressure of the accumulator reaches the unloading pressure of the accumulator.

[0082] In the event of an abnormal operation of either the engine or the motor, the other object can be used as a power source.

[0083] As an optional implementation, in an embodiment of the invention, see Figure 6 As shown, after judging whether the actual outlet pressure of the dryer is lower than the opening pressure of the dryer or judging whether the actual storage pressure of the accumulator is lower than the opening pressure of the accumulator, the method further includes:

[0084] If the actual outlet pressure of the dryer is lower than the opening pressure of the dryer and the actual storage pressure of the accumulator is not lower than the opening pressure of the accumulator, the opening pressure and the unloading pressure of the accumulator are adjusted, and the accumulator is charged while pumping air into the air supply system;

[0085] If the actual outlet pressure of the dryer is not lower than the opening pressure of the dryer and the actual storage pressure of the accumulator is lower than the opening pressure of the accumulator, adjust the opening pressure and unloading pressure of the dryer, and pump air into the air supply system while charging the accumulator.

[0086] For example, in pure electric mode, the actual outlet pressure of the dryer is P4, and P1<P4<P2, the actual storage pressure of the accumulator is PD, PD<PA, and the vehicle controller determines that the accumulator needs to be charged, the air compressor assembly is connected to the engine, and the vehicle controller adjusts the opening pressure of the dryer to P4. At this time, the air compressor assembly charges the accumulator while pumping air into the air supply system. If the accumulator charging is completed earlier than the pumping, the vehicle controller adjusts the unloading pressure of the dryer to the actual outlet pressure at this time. Make the air compressor steering pump assembly pump air into the air supply system and charge the accumulator at the same time as much as possible to save energy.

[0087] As an optional implementation, in one embodiment of the invention, the air compressor steering pump assembly also includes: a water pump, the water pump is coaxially connected to the air compressor and the steering pump, and the water pump is also connected to the water tank and the radiator to form a circulation loop, and the circulation loop is used to cool the air compressor steering pump assembly. The purpose of the integrated water pump is to provide cooling for the air compressor steering pump assembly. In the prior art, the cooling of the air compressor is usually integrated with the cooling of the engine system, which also results in the air compressor being unable to be cooled if the engine is not running in pure electric mode.

[0088] See also Figure 3 As shown, an embodiment of the present invention also provides a control method for a hybrid vehicle, comprising the following steps:

[0089] Step S10, judging whether it is necessary to pump air into the air supply system or charge the accumulator according to the current driving mode of the vehicle, the actual outlet pressure of the dryer and the actual storage pressure of the accumulator.

[0090] Step S20: If yes, control the first clutch to engage and the second clutch to disengage, or control the first clutch to disengage and the second clutch to engage according to the current driving mode of the vehicle and the working status of the engine and the motor;

[0091] Step S30: If not, control the first clutch and the second clutch to be disengaged.

[0092] As an optional implementation, in an embodiment of the invention, see Figure 4 As shown, judging whether it is necessary to pump air into the air supply system or charge the accumulator according to the current driving mode of the vehicle, the actual outlet pressure of the dryer and the actual storage pressure of the accumulator includes:

[0093] Step S101, obtaining the driving mode of the vehicle;

[0094] Step S102, when the vehicle is in the pure fuel mode, hybrid mode or pure electric mode, the opening pressure and unloading pressure of the dryer are set to P1 and P2 respectively, and the opening pressure and unloading pressure of the accumulator are set to PA and PB respectively; when the vehicle is in the energy recovery mode, the opening pressure and unloading pressure of the dryer are set to P2 and P3 respectively, and the opening pressure and unloading pressure of the accumulator are set to PB and PC respectively; wherein P1<P2<P3, PA<PB<PC;

[0095] Step S103, determining whether the actual outlet pressure of the dryer is lower than the opening pressure of the dryer or determining whether the actual storage pressure of the accumulator is lower than the opening pressure of the accumulator;

[0096] Step S104: If yes, it is determined that it is necessary to pump air into the air supply system or charge the accumulator.

[0097] As an optional implementation, in an embodiment of the invention, see Figure 5 As shown, if the first clutch is controlled to engage and the second clutch is controlled to disengage, or the first clutch is controlled to disengage and the second clutch is controlled to engage according to the current driving mode of the vehicle and the working states of the engine and the motor, the method includes:

[0098] Step S201, determine whether the engine and the motor are both working normally:

[0099] Step S202: if yes, control the first clutch to engage and the second clutch to disengage until the actual outlet pressure of the dryer reaches the unloading pressure of the dryer or the actual storage pressure of the accumulator reaches the unloading pressure of the accumulator; or control the first clutch to disengage and the second clutch to engage until the actual outlet pressure of the dryer reaches the unloading pressure of the dryer or the actual storage pressure of the accumulator reaches the unloading pressure of the accumulator;

[0100] Step S203, if not, obtaining the driving mode of the vehicle;

[0101] Step S204, when the vehicle is in pure fuel mode or hybrid mode and the motor is abnormal, the first clutch is controlled to engage and the second clutch is controlled to disengage until the actual outlet pressure of the dryer reaches the unloading pressure of the dryer or the actual storage pressure of the accumulator reaches the unloading pressure of the accumulator;

[0102] Step S205, when the vehicle is in pure electric mode or energy recovery mode and the engine is abnormal, the first clutch is controlled to be disengaged and the second clutch is controlled to be engaged until the actual outlet pressure of the dryer reaches the unloading pressure of the dryer or the actual storage pressure of the accumulator reaches the unloading pressure of the accumulator.

[0103] As an optional implementation, in an embodiment of the invention, see Figure 6 As shown, after judging whether the actual outlet pressure of the dryer is lower than the opening pressure of the dryer or judging whether the actual storage pressure of the accumulator is lower than the opening pressure of the accumulator, the method further includes:

[0104] Step S105, if the actual outlet pressure of the dryer is lower than the opening pressure of the dryer and the actual storage pressure of the accumulator is not lower than the opening pressure of the accumulator, the opening pressure and the unloading pressure of the accumulator are adjusted, and the accumulator is charged while pumping air into the air supply system;

[0105] Step S106, if the actual outlet pressure of the dryer is not lower than the opening pressure of the dryer and the actual storage pressure of the accumulator is lower than the opening pressure of the accumulator, adjust the opening pressure and unloading pressure of the dryer, and inflate the air supply system while charging the accumulator.

[0106] In the description of the present invention, it should be noted that the terms "upper", "lower", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present invention. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0107] It should be noted that, in the present invention, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0108] The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features of the present invention.

Claims

1. A control system for a hybrid vehicle, characterized in that: include: An air compressor steering pump assembly, which includes an air compressor and a steering pump coaxially connected; an accumulator connected to an outlet of the steering pump; a dryer connected to an outlet of the air compressor; A first clutch connected to an output shaft of the engine and an input shaft of an air compressor steering pump assembly; The second clutch is connected to the output shaft of the motor and the input shaft of the air compressor steering pump assembly The vehicle controller is configured as follows: According to the current driving mode of the vehicle, the actual outlet pressure of the dryer and the actual storage pressure of the accumulator, it is determined whether it is necessary to inflate the air supply system or charge the accumulator; If yes, according to the current driving mode of the vehicle and the working states of the engine and the motor, the first clutch is controlled to be engaged and the second clutch is controlled to be disengaged, or the first clutch is controlled to be disengaged and the second clutch is controlled to be engaged; If not, controlling both the first clutch and the second clutch to be disengaged; The determining whether it is necessary to pump air into the air supply system or charge the accumulator according to the current driving mode of the vehicle, the actual outlet pressure of the dryer and the actual storage pressure of the accumulator includes: Get the vehicle's driving mode; When the vehicle is in pure fuel mode, hybrid mode or pure electric mode, the opening pressure and unloading pressure of the dryer are set to P1 and P2 respectively, and the opening pressure and unloading pressure of the accumulator are set to PA and PB respectively; when the vehicle is in energy recovery mode, the opening pressure and unloading pressure of the dryer are set to P2 and P3 respectively, and the opening pressure and unloading pressure of the accumulator are set to PB and PC respectively; wherein, P1<P2<P3, PA<PB<PC; Determine whether the actual outlet pressure of the dryer is lower than the opening pressure of the dryer or determine whether the actual storage pressure of the accumulator is lower than the opening pressure of the accumulator; If so, it is determined that it is necessary to pump air into the air supply system or charge the accumulator.

2. The hybrid vehicle control system according to claim 1, characterized in that: If so, according to the current driving mode of the vehicle and the working states of the engine and the motor, controlling the first clutch to engage and the second clutch to disengage, or controlling the first clutch to disengage and the second clutch to engage, comprises: Determine whether the engine and motor are working properly: If so, the first clutch is controlled to engage and the second clutch is controlled to disengage until the actual outlet pressure of the dryer reaches the unloading pressure of the dryer or the actual storage pressure of the accumulator reaches the unloading pressure of the accumulator; or the first clutch is controlled to disengage and the second clutch is controlled to engage until the actual outlet pressure of the dryer reaches the unloading pressure of the dryer or the actual storage pressure of the accumulator reaches the unloading pressure of the accumulator.

3. The control system of a hybrid vehicle according to claim 2, characterized in that: After determining whether the engine and the motor are both operating normally, the method further includes: If not, obtain the driving mode of the vehicle; When the vehicle is in pure fuel mode or hybrid mode and the motor is abnormal, the first clutch is controlled to engage and the second clutch is controlled to disengage until the actual outlet pressure of the dryer reaches the unloading pressure of the dryer or the actual storage pressure of the accumulator reaches the unloading pressure of the accumulator; When the vehicle is in pure electric mode or energy recovery mode and the engine is abnormal, the first clutch is controlled to disengage and the second clutch is controlled to engage until the actual outlet pressure of the dryer reaches the unloading pressure of the dryer or the actual storage pressure of the accumulator reaches the unloading pressure of the accumulator.

4. The control system of a hybrid vehicle according to claim 1, characterized in that: After determining whether the actual outlet pressure of the dryer is lower than the opening pressure of the dryer or determining whether the actual storage pressure of the accumulator is lower than the opening pressure of the accumulator, the method further includes: If the actual outlet pressure of the dryer is lower than the opening pressure of the dryer and the actual storage pressure of the accumulator is not lower than the opening pressure of the accumulator, the opening pressure and the unloading pressure of the accumulator are adjusted, and the accumulator is charged while pumping air into the air supply system; If the actual outlet pressure of the dryer is not lower than the opening pressure of the dryer and the actual storage pressure of the accumulator is lower than the opening pressure of the accumulator, adjust the opening pressure and unloading pressure of the dryer, and pump air into the air supply system while charging the accumulator.

5. The control system of a hybrid vehicle according to claim 1, characterized in that: The air compressor steering pump assembly also includes: A water pump is coaxially connected to the air compressor and the steering pump. The water pump is also connected to a water tank and a radiator to form a circulation loop, and the circulation loop is used to cool the air compressor steering pump assembly.

6. A control method for a hybrid vehicle, using the control system of the hybrid vehicle according to claim 1, characterized in that: The following steps are involved: According to the current driving mode of the vehicle, the actual outlet pressure of the dryer and the actual storage pressure of the accumulator, it is determined whether it is necessary to pump air into the air supply system or charge the accumulator; If yes, according to the current driving mode of the vehicle and the working states of the engine and the motor, the first clutch is controlled to engage and the second clutch is controlled to disengage, or the first clutch is controlled to disengage and the second clutch is controlled to engage; If not, control the first clutch and the second clutch to be disengaged; The determining whether it is necessary to pump air into the air supply system or charge the accumulator according to the current driving mode of the vehicle, the actual outlet pressure of the dryer and the actual storage pressure of the accumulator includes: Get the vehicle's driving mode; When the vehicle is in pure fuel mode, hybrid mode or pure electric mode, the opening pressure and unloading pressure of the dryer are set to P1 and P2 respectively, and the opening pressure and unloading pressure of the accumulator are set to PA and PB respectively; when the vehicle is in energy recovery mode, the opening pressure and unloading pressure of the dryer are set to P2 and P3 respectively, and the opening pressure and unloading pressure of the accumulator are set to PB and PC respectively; wherein, P1<P2<P3, PA<PB<PC; Determine whether the actual outlet pressure of the dryer is lower than the opening pressure of the dryer or whether the actual storage pressure of the accumulator is lower than the opening pressure of the accumulator; If so, it is determined that it is necessary to pump air into the air supply system or charge the accumulator.

7. The control method of a hybrid vehicle according to claim 6, characterized in that: If so, according to the current driving mode of the vehicle and the working states of the engine and the motor, controlling the first clutch to engage and the second clutch to disengage, or controlling the first clutch to disengage and the second clutch to engage, comprises: Determine whether the engine and motor are working properly: If so, the first clutch is controlled to engage and the second clutch is controlled to disengage until the actual outlet pressure of the dryer reaches the unloading pressure of the dryer or the actual storage pressure of the accumulator reaches the unloading pressure of the accumulator; or the first clutch is controlled to disengage and the second clutch is controlled to engage until the actual outlet pressure of the dryer reaches the unloading pressure of the dryer or the actual storage pressure of the accumulator reaches the unloading pressure of the accumulator; If not, obtain the driving mode of the vehicle; When the vehicle is in pure fuel mode or hybrid mode and the motor is abnormal, the first clutch is controlled to engage and the second clutch is controlled to disengage until the actual outlet pressure of the dryer reaches the unloading pressure of the dryer or the actual storage pressure of the accumulator reaches the unloading pressure of the accumulator; When the vehicle is in pure electric mode or energy recovery mode and the engine is abnormal, the first clutch is controlled to disengage and the second clutch is controlled to engage until the actual outlet pressure of the dryer reaches the unloading pressure of the dryer or the actual storage pressure of the accumulator reaches the unloading pressure of the accumulator.

8. The control method of a hybrid vehicle according to claim 6, characterized in that: After determining whether the actual outlet pressure of the dryer is lower than the opening pressure of the dryer or determining whether the actual storage pressure of the accumulator is lower than the opening pressure of the accumulator, the method further includes: If the actual outlet pressure of the dryer is lower than the opening pressure of the dryer and the actual storage pressure of the accumulator is not lower than the opening pressure of the accumulator, adjust the opening pressure and unloading pressure of the accumulator, and charge the accumulator while pumping air into the air supply system; If the actual outlet pressure of the dryer is not lower than the opening pressure of the dryer and the actual storage pressure of the accumulator is lower than the opening pressure of the accumulator, adjust the opening pressure and unloading pressure of the dryer, and pump air into the air supply system while charging the accumulator.

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