A full terrain driving mode switching system and method based on a PHEV four-wheel drive vehicle

Abstract

The present disclosure relates to a kind of all-terrain driving mode switching system and switching method based on PHEV four-wheel drive vehicle, switching system includes brake-by-wire system, car system, hybrid control system, electric power steering system, driving mode switching switch, vehicle body area control and instrument system;The driving mode switching switch is used to send driving mode request signal to the car system;The car system is used to forward driving mode request signal to the brake-by-wire system, the hybrid control system and the electric power steering system, the brake-by-wire system, the hybrid control system and the electric power steering system execute corresponding MAP.The present disclosure is based on different driving road conditions of automobile corresponding driving mode switching, and each group of sensor is used to detect automobile driving mode switching state, to realize driving mode intelligent control, meet the demand of user in economy, comfort, sports, off-road scene, improve the driving experience of vehicle.

Description

TECHNICAL FIELD

[0001] The present disclosure belongs to the technical field of automobile driving mode switching, and particularly relates to a full-terrain driving mode switching system and method based on a PHEV four-wheel drive vehicle. BACKGROUND

[0002] Currently, the cabin of a conventional PHEV (plug-in hybrid electric vehicle) four-wheel drive vehicle generally only has an economy mode, a standard mode and a sport mode. The future automobile market is an intelligent automobile market. The current automobile with only three modes cannot meet the full-terrain driving scene.

[0003] Therefore, it is necessary to provide a new full-terrain driving mode switching system and method based on a PHEV four-wheel drive vehicle to solve the above technical problems. SUMMARY

[0004] The present disclosure aims to provide a full-terrain driving mode switching system and method based on a PHEV four-wheel drive vehicle to solve the above problems.

[0005] The present disclosure achieves the above-mentioned purpose through the following technical solutions:

[0006] A full-terrain driving mode switching system based on a PHEV four-wheel drive vehicle, comprising a brake-by-wire system WCBS, an infotainment system IHU, a hybrid control system HCU, an electric power steering system EPS, a driving mode switching switch ATCM, a body domain control CEM and an instrument system ICM;

[0007] The body domain control CEM is configured to provide a vehicle power supply state.

[0008] The driving mode switching switch ATCM is configured to send a driving mode request signal to the infotainment system IHU.

[0009] The infotainment system IHU is configured to forward the driving mode request signal to the brake-by-wire system WCBS, the hybrid control system HCU and the electric power steering system EPS, and the brake-by-wire system WCBS, the hybrid control system HCU and the electric power steering system EPS execute corresponding MAPs; the infotainment system IHU executes a corresponding driving mode according to the feedback of the brake-by-wire system WCBS.

[0010] As a further optimization scheme of the present disclosure, the infotainment system IHU executing a corresponding driving mode according to the feedback of the brake-by-wire system WCBS specifically comprises:

[0011] The infotainment system IHU receives a feedback signal of whether the brake-by-wire system WCBS allows entering the mode.

[0012] If yes, the car machine system IHU sends a corresponding driving mode signal, displays a switching animation corresponding to the driving mode, the instrument system ICM receives the driving mode feedback signal sent by the car machine system IHU, and displays the driving mode information of the corresponding mode; the car machine system IHU switches the audio sound wave according to the corresponding driving mode;

[0013] If no, the car machine system IHU sends a driving mode signal, the hybrid control system HCU, the line control brake system WCBS and the electric power steering system EPS switch the MAP in the economic mode, the car machine system IHU displays the animation in the economic mode and switches the audio sound wave to the audio sound wave in the economic mode, the instrument system ICM displays the driving mode in the economic mode and gives a corresponding prompt; the car machine system IHU memorizes the current driving mode.

[0014] As a further optimization scheme of the present disclosure, when the electric power steering system EPS executes the corresponding MAP, if the current electric power steering system EPS and the driving mode joint debugging state are in the open state, the electric power steering system EPS executes the corresponding MAP following the driving mode and sends a feedback signal to the car machine system IHU, and the feedback signal is not used as a switching arbitration condition for switching the driving mode.

[0015] If the current electric power steering system EPS joint debugging state is in the closed state, the electric power steering system EPS has no action.

[0016] As a further optimization scheme of the present disclosure, in the driving mode memory function, if the vehicle is powered on again, the car machine system IHU first judges whether the driving mode before power-off is the standard or sport mode, if it is one of them, it is executed normally; if it is snow, mud, sand or rock driving mode, the car machine system IHU sends a driving mode signal, displays a switching animation in the economic mode, the hybrid control system HCU, the line control brake system WCBS and the electric power steering system EPS switch the MAP in the economic mode, and the car machine system IHU switches the audio sound wave to the audio sound wave in the economic mode.

[0017] As a further optimization scheme of the present disclosure, if the driving mode signal is lost, the hybrid control system HCU, the line control brake system WCBS and the electric power steering system EPS maintain the current driving mode, and the instrument system does not display the specific driving mode.

[0018] A driving mode switching method of a full terrain driving mode switching system based on a PHEV four-wheel drive vehicle, comprising the following steps:

[0019] The automobile body domain controller system provides the power state of the whole vehicle;

[0020] In the vehicle starting state, the rotary driving mode switching switch ATCM sends a driving mode request signal to the infotainment system IHU;

[0021] The infotainment system IHU receives the driving mode switching demand signal and forwards the driving mode request signal to the hybrid control system HCU, the line control braking system WCBS and the electric power steering system EPS.

[0022] The hybrid control system HCU receives the driving mode switching request signal to execute the corresponding MAP, the line control braking system WCBS receives the driving mode switching request signal to execute the corresponding MAP and sends a feedback signal to the infotainment system IHU, and the electric power steering system EPS follows the driving mode to execute the corresponding MAP.

[0023] The infotainment system executes the corresponding driving mode according to the feedback of the line control braking system WCBS.

[0024] The beneficial effects of the present disclosure are that:

[0025] The present disclosure switches the driving mode according to different driving road conditions of the vehicle, and detects the driving mode switching state of the vehicle by each group of sensors, so as to realize intelligent control of the driving mode, meet the needs of users in economic, comfortable, sports, off-road and other scenes, and improve the driving experience of the vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a schematic diagram of the overall structure of the present disclosure;

[0027] Figure 2 is a driving mode switching flowchart in an embodiment of the present disclosure;

[0028] Figure 3 is an electric four-wheel drive driving mode and each system MAP matrix diagram in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0029] The following detailed description of the present application will be further described in conjunction with the accompanying drawings, and it is necessary to point out here that the following detailed description is only used to further illustrate the present application, and cannot be understood as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application according to the above application content.

[0030] As shown in Figure 1 A full terrain driving mode switching system based on a PHEV four-wheel drive vehicle, comprising a line control braking system WCBS, an infotainment system IHU, a hybrid control system HCU, an electric power steering system EPS, a driving mode switching switch ATCM, a vehicle body domain control CEM and an instrument system ICM.

[0031] The body domain control CEM provides the whole vehicle power supply state, the driving mode switching switch ATCM sends the driving mode request signal to the car system IHU, the car system IHU forwards the driving mode request signal to the line control brake system WCBS, the hybrid control system HCU and the electric power steering system EPS;The line control brake system WCBS, the hybrid control system HCU and the electric power steering system EPS execute corresponding MAP(Manifold Absdlute Pressure, for measuring the change of absolute pressure(in vacuum) in the intake manifold, and converting it into a voltage signal, transmitting to the engine electronic control unit(ECU), ECU judges the engine load according to this, and combines the speed signal, so as to determine the injection amount);

[0032] The car system IHU receives the feedback signal of whether the line control brake system WCBS allows to enter the mode;

[0033] If the line control brake system WCBS allows to enter the mode, the car system IHU sends the corresponding driving mode signal, displays the switching animation corresponding to the driving mode, the instrument system ICM receives the driving mode feedback signal sent by the car system IHU, displays the driving mode information of the corresponding mode;The car system IHU switches the audio sound wave according to the corresponding driving mode;

[0034] If the car system IHU receives the feedback signal of not allowing from the line control brake system WCBS, the car system IHU sends the driving mode as economic mode, the hybrid control system HCU, the line control brake system WCBS and the electric power steering system EPS switch the MAP of the driving mode as economic mode, the car system IHU displays the animation under economic mode and switches the audio sound wave to the audio sound wave under economic mode, the instrument system ICM displays the driving mode as economic mode and gives the corresponding prompt;Further, the car system IHU memorizes the current driving mode.

[0035] In combination with the above scheme, as Figure 2 and Figure 3As shown, the PHEV electric four-wheel drive all-terrain driving mode switching system provided by the application specifically, when the electric power steering system EPS executes the corresponding MAP, if the current electric power steering system EPS and the driving mode joint debugging state is in the open state, the electric power steering system EPS follows the driving mode to execute the corresponding MAP and sends the feedback signal to the vehicle system IHU, the feedback signal is not used as the switching driving mode switching arbitration condition, if the current electric power steering system EPS joint debugging state is in the closed state, the electric power steering system EPS is inaction, further, in the driving mode memory function, if the vehicle is powered on again, the vehicle system IHU first judges whether the driving mode before power off is normal (normal) or sport mode (sport), if it is one of them, it is executed normally, if it is snow (snow), mud (mud), sand (sand) and rock (rock) driving mode, the vehicle system IHU sends the driving mode as the economic mode, displays the switching animation under the economic mode, the hybrid control system HCU, the brake-by-wire system WCBS and the electric power steering system EPS switch the driving mode to the MAP under the economic mode, and the vehicle system IHU switches the audio sound wave to the audio sound wave under the economic mode; further, if the driving mode signal is lost, the hybrid control system HCU, the brake-by-wire system WCBS and the electric power steering system EPS maintain the current driving mode, and the instrument system does not display the specific driving mode.

[0036] A driving mode switching method of a PHEV four-wheel drive vehicle based all-terrain driving mode switching system, comprising the following steps:

[0037] The automobile body domain controller system provides the vehicle power state;

[0038] In the vehicle starting state, rotate the driving mode switching switch ATCM, and send the driving mode request signal to the vehicle system IHU;

[0039] The vehicle system IHU receives the driving mode switching demand signal, and forwards the driving mode request signal to the hybrid control system HCU, the brake-by-wire system WCBS and the electric power steering system EPS;

[0040] The hybrid control system HCU receives the driving mode switching request signal to execute the corresponding MAP, the brake-by-wire system WCBS receives the driving mode switching request signal to execute the corresponding MAP and sends the feedback signal to the vehicle system IHU, and the electric power steering system EPS follows the driving mode to execute the corresponding MAP;

[0041] The vehicle system executes the corresponding driving mode according to the feedback of the brake-by-wire system WCBS.

[0042] The above-described embodiments are merely illustrative of several embodiments of the present disclosure, which are described in a relatively specific and detailed manner, but should not be construed as limiting the scope of the patent of the present disclosure. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present disclosure, and these all belong to the protection scope of the present disclosure.

Claims

1. A full terrain driving mode switching system based on a PHEV four-wheel drive vehicle, characterized by, The system comprises a wheel control brake system (WCBS), an infotainment head unit (IHU), a hybrid control unit (HCU), an electric power steering system (EPS), a driving mode switch (ATCM), a body domain control (CEM), and an instrument cluster (ICM). The body domain control (CEM) is configured to provide a vehicle power supply state. The driving mode switch (ATCM) is configured to send a driving mode request signal to the infotainment head unit (IHU). The infotainment head unit (IHU) is configured to forward the driving mode request signal to the wheel control brake system (WCBS), the hybrid control unit (HCU), and the electric power steering system (EPS), and the wheel control brake system (WCBS), the hybrid control unit (HCU), and the electric power steering system (EPS) execute corresponding MAPs. The infotainment head unit (IHU) executes a corresponding driving mode according to feedback of the wheel control brake system (WCBS), comprising: The infotainment head unit (IHU) receives a feedback signal of whether the wheel control brake system (WCBS) allows entering the mode. If yes, the infotainment head unit (IHU) sends a corresponding driving mode signal, displays a switching animation of the corresponding driving mode, the instrument cluster (ICM) receives a driving mode feedback signal sent by the infotainment head unit (IHU), and displays driving mode information of the corresponding mode; the infotainment head unit (IHU) switches audio sound waves according to the corresponding driving mode. If no, the infotainment head unit (IHU) sends a driving mode as an economic mode, the hybrid control unit (HCU), the wheel control brake system (WCBS), and the electric power steering system (EPS) switch the MAPs in the economic mode, the infotainment head unit (IHU) displays an animation in the economic mode and switches audio sound waves to audio sound waves in the economic mode, the instrument cluster (ICM) displays the driving mode as the economic mode and gives corresponding prompts; the infotainment head unit (IHU) memorizes the current driving mode.

2. A full terrain driving mode switching system for a PHEV four-wheel drive vehicle according to claim 1, characterized in that, When the electric power steering system (EPS) executes the corresponding MAP, if the current electric power steering system (EPS) and the driving mode are in a start state, the electric power steering system (EPS) executes the corresponding MAP following the driving mode and sends a feedback signal to the infotainment head unit (IHU), and the feedback signal is not used as a switching arbitration condition for switching the driving mode. If the current electric power steering system (EPS) is in a closed state, the electric power steering system (EPS) does not act.

3. A full terrain driving mode switching system for a PHEV four-wheel drive vehicle according to claim 1, characterized in that, In the driving mode memory function, if the vehicle is powered on again, the infotainment head unit (IHU) first determines whether the driving mode before power-off is a standard or sport mode, if it is one of them, it is executed normally; if it is a snow, mud, sand, or rock driving mode, the infotainment head unit (IHU) sends a driving mode as an economic mode, displays a switching animation in the economic mode, the hybrid control unit (HCU), the wheel control brake system (WCBS), and the electric power steering system (EPS) switch the MAPs in the economic mode, and the infotainment head unit (IHU) switches the audio sound waves to the audio sound waves in the economic mode.

4. A full terrain driving mode switching system for a PHEV four-wheel drive vehicle according to claim 3, characterized in that, If the driving mode signal is lost, the hybrid control system HCU, the brake-by-wire system WCBS, and the electric power steering system EPS maintain the current driving mode, and the instrument system does not display the specific driving mode.

5. A driving mode switching method of an all-terrain driving mode switching system for a PHEV four-wheel drive vehicle according to claim 1, characterized by, The method comprises the following steps: The automobile body domain controller system provides a whole vehicle power supply state; In a vehicle starting state, a rotary driving mode switch ATCM sends a driving mode request signal to an infotainment system IHU; The infotainment system IHU receives the driving mode switch demand signal and forwards the driving mode request signal to the hybrid control system HCU, the brake-by-wire system WCBS, and the electric power steering system EPS; The hybrid control system HCU receives the driving mode switch request signal and executes a corresponding MAP, the brake-by-wire system WCBS receives the driving mode switch request signal, executes a corresponding MAP, and sends a feedback signal to the infotainment system IHU, and the electric power steering system EPS follows the driving mode to execute a corresponding MAP; The infotainment system IHU executes a corresponding driving mode according to the feedback of the brake-by-wire system WCBS.

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