1. A pure electric vehicle cruise control system based on a CAN controller is characterized by comprising a multifunctional steering wheel, the CAN controller, a whole vehicle controller, a drive assembly, an accelerator pedal and a brake pedal;

the multifunctional steering wheel is used for converting key signals of cruise enable, cruise exit, cruise + and cruise-into resistance signals;

the CAN controller is used for converting the resistance signal into a CAN signal and generating a cruise command;

the whole vehicle controller is used for identifying the cruise command and judging the opening degree of an accelerator pedal and the opening degree of a brake pedal; converting the cruise command into a target signal by combining the opening degree of an accelerator pedal and the opening degree of a brake pedal;

the driving assembly is used for identifying the target signal and controlling the whole vehicle to enter a corresponding cruise mode.

2. The CAN-controller-based cruise control system for an electric vehicle according to claim 1, wherein the cruise modes include a cruise-and-trim cruise mode, a temporary cruise mode exit, and a permanent cruise mode exit.

3. The pure electric vehicle cruise control system based on the CAN controller according to claim 2, wherein the cruise and regulated cruise mode is entered, the whole vehicle controller recognizes a cruise enable signal and starts to judge the current actual vehicle speed and the opening degree of a brake pedal; and the brake pedal switch is less than or equal to 5 percent, the current vehicle speed is greater than or equal to 40Km/h, the whole vehicle controller enters a target vehicle speed control mode, the vehicle enters a cruise mode at the average vehicle speed 10s before the cruise enabling signal is received, and the combination meter displays a cruise entering icon.

4. The pure electric vehicle cruise control system based on the CAN controller as claimed in claim 3, wherein the brake pedal switch is not satisfied to be less than or equal to 5% and the current vehicle speed is greater than or equal to 40Km/h, the cruise control mode is not entered, and the whole control is requested according to the actual situation.

5. The pure electric vehicle cruise control system based on the CAN controller according to claim 3, wherein after entering the cruise mode, if the vehicle controller receives cruise + CAN signal enable, the vehicle controller starts to judge, if the current vehicle speed is not less than the vehicle speed limit requirement, the vehicle runs according to the highest vehicle speed,

and if the current vehicle speed is less than the speed limit requirement of the whole vehicle, the whole vehicle controller adjusts the target vehicle speed, and the target vehicle speed is increased by 1Km/h every time the 3 Zhen messages are continuously received.

6. The pure electric vehicle cruise control system based on the CAN controller according to claim 3, wherein after entering the cruise mode, if the vehicle controller receives the cruise-CAN signal enable, the vehicle controller starts to judge that the current vehicle speed is less than or equal to 40Km/h, and the vehicle runs according to 40 Km/h;

if the current vehicle speed is larger than 40Km/h, the vehicle control unit adjusts the target vehicle speed, and the target vehicle speed is reduced by 1Km/h when 3 glossy privet messages are continuously received.

7. The pure electric vehicle cruise control system based on the CAN controller according to claim 2, wherein a temporary exit cruise mode is entered, in the cruise mode, the multifunctional steering wheel sends out a cruise exit signal, the whole vehicle exits the cruise mode, the cruise mode is entered without intervention of a throttle or a brake pedal, and the cruise mode is recovered without intervention of a throttle or a brake pedal, and the cruise mode state before the cruise mode is entered.

8. The pure electric vehicle cruise control system based on the CAN controller as claimed in claim 7, wherein in the cruise mode, an accelerator pedal is involved, the driving torque requested by the opening degree of the accelerator pedal is larger than the torque at the cruise time, the vehicle controller requests the torque according to the opening degree of the accelerator pedal to realize vehicle acceleration, the accelerator pedal is restored to be smaller than the cruise torque, and the vehicle is restored to the cruise mode and runs normally.

9. The pure electric vehicle cruise control system based on the CAN controller according to claim 7, wherein a permanent exit cruise mode is entered, in the cruise mode, the vehicle control unit detects that the intervention opening degree of the brake pedal is more than 5%, the vehicle control unit exits the cruise mode, and the vehicle is decelerated in response to the brake torque.

10. A pure electric vehicle cruise control method based on CAN controller, characterized in that, the pure electric vehicle cruise control system based on CAN controller according to any claim-9 is adopted, which mainly includes the following contents:

converting key signals of cruise enable, cruise exit, cruise + and cruise-into resistance signals;

converting the resistance signal into a CAN signal to generate a cruise command;

recognizing the cruise command, and judging the opening degree of an accelerator pedal and the opening degree of a brake pedal; converting the cruise command into a target signal by combining the opening degree of an accelerator pedal and the opening degree of a brake pedal;

and identifying the target signal and controlling the whole vehicle to enter a corresponding cruise mode.

Background

The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.

Along with the popularization of pure electric vehicles, the occupation ratio of electric vehicles in motor vehicles is rising year by year, the pure electric vehicles have great advantages in the control field compared with the traditional power vehicle types, wherein the advantages of easy control, low noise, light weight and low cost are particularly obvious, the popularization of the electric vehicles also drives the rapid promotion of the technical capabilities of auxiliary driving and automatic driving, as an important ring of automatic driving, different technical routes appear in constant-speed cruise control, and the cruise control method with stable, reliable and multifunctional regulation becomes a key project for competitive development of various host plants.

The inventor finds that the conventional constant-speed cruise device comprises a cruise switch and a multimedia switch which are fixed on an automobile steering wheel, and an MCU (microprogrammed control unit) is connected with a vehicle-mounted data communication bus through a CAN (controller area network) communication unit; the main controller is also provided with an external protection signal input end, and when a brake is stepped on, the constant-speed cruise can be forcibly cancelled; however, the conventional constant-speed cruise apparatus cannot determine whether to enter or exit the cruise control mode according to the opening degree of the brake pedal, and the cruise control mode is poor in switching controllability and low in driving safety.

Disclosure of Invention

The cruise control system and the cruise control method of the pure electric vehicle based on the CAN controller are provided for solving the problems.

In order to achieve the above purpose, in a first aspect, the present disclosure provides a pure electric vehicle cruise control system based on a CAN controller, which adopts the following technical solutions:

a pure electric vehicle cruise control system based on a CAN controller comprises a multifunctional steering wheel, the CAN controller, a whole vehicle controller, a drive assembly, an accelerator pedal and a brake pedal;

the multifunctional steering wheel is used for converting key signals of cruise enable, cruise exit, cruise + and cruise-into resistance signals;

the CAN controller is used for converting the resistance signal into a CAN signal and generating a cruise command;

the whole vehicle controller is used for identifying the cruise command and judging the opening degree of an accelerator pedal and the opening degree of a brake pedal; converting the cruise command into a target signal by combining the opening degree of an accelerator pedal and the opening degree of a brake pedal;

the driving assembly is used for identifying the target signal and controlling the whole vehicle to enter a corresponding cruise mode.

Further, the cruise modes include entering a cruise and trim cruise mode, temporarily exiting a cruise mode, and permanently exiting a cruise mode.

Further, entering a cruise and cruise adjusting mode, recognizing a cruise enabling signal by the vehicle controller, and starting to judge the current actual vehicle speed and the opening degree of a brake pedal; and the brake pedal switch is less than or equal to 5 percent, the current vehicle speed is greater than or equal to 40Km/h, the whole vehicle controller enters a target vehicle speed control mode, the vehicle enters a cruise mode at the average vehicle speed 10s before the cruise enabling signal is received, and the combination meter displays a cruise entering icon.

Furthermore, the brake pedal switch is not satisfied to be less than or equal to 5%, the current vehicle speed is not less than or equal to 40Km/h, the cruise control mode is not entered, and the integral control is requested according to the actual situation.

Further, after entering the cruise mode, if the whole vehicle controller receives the cruise + CAN signal enable, the whole vehicle controller starts to judge, if the current vehicle speed is not less than the whole vehicle speed limit requirement, the whole vehicle runs according to the highest vehicle speed,

and if the current vehicle speed is less than the speed limit requirement of the whole vehicle, the whole vehicle controller adjusts the target vehicle speed, and the target vehicle speed is increased by 1Km/h every time the 3 Zhen messages are continuously received.

Further, after entering a cruise mode, if the whole vehicle controller receives cruise-CAN signal enable, the whole vehicle controller starts to judge that the current vehicle speed is less than or equal to 40Km/h, and the whole vehicle runs at the vehicle speed of 40 Km/h;

if the current vehicle speed is larger than 40Km/h, the vehicle control unit adjusts the target vehicle speed, and the target vehicle speed is reduced by 1Km/h when 3 glossy privet messages are continuously received.

And further entering a temporary exit cruise mode, wherein in the cruise mode, the multifunctional steering wheel sends out a cruise exit signal, the whole vehicle exits the cruise mode, and enters a sliding mode without intervention of an accelerator or a brake pedal, and the cruise mode is recovered and enters a cruise mode state before the sliding mode without intervention of the accelerator or the brake pedal.

Further, in the cruise mode, an accelerator pedal is involved, the driving torque required by the opening degree of the accelerator pedal is larger than the torque during cruise, the vehicle controller requests the torque according to the opening degree of the accelerator pedal to realize vehicle acceleration, the accelerator pedal is restored to be smaller than the cruise torque, and the vehicle is restored to the cruise mode and normally runs.

And further, entering a permanent exit cruise mode, wherein in the cruise mode, the whole vehicle controller detects that the intervention opening degree of a brake pedal is more than 5%, exits the cruise mode, and responds to the brake torque to realize vehicle deceleration.

In order to achieve the above object, in a second aspect, the present disclosure provides a pure electric vehicle cruise control method based on a CAN controller, which adopts the following technical solutions:

the pure electric vehicle cruise control method based on the CAN controller adopts the pure electric vehicle cruise control system based on the CAN controller in the first aspect, and mainly comprises the following steps:

converting key signals of cruise enable, cruise exit, cruise + and cruise-into resistance signals;

converting the resistance signal into a CAN signal to generate a cruise command;

recognizing the cruise command, and judging the opening degree of an accelerator pedal and the opening degree of a brake pedal; converting the cruise command into a target signal by combining the opening degree of an accelerator pedal and the opening degree of a brake pedal;

and identifying the target signal to realize the cruise control of the whole vehicle.

Compared with the prior art, the beneficial effect of this disclosure is:

1. the cruise control realized based on the CAN controller solves the difficult problem of cruise control of pure electric vehicles, and realizes the cruise control of the pure electric vehicles;

2. the cruise control realized based on the CAN controller reduces the occupation of the whole control management and education, realizes the development of the matching mode and reduces the development cost of a host factory;

3. the cruise control realized based on the CAN controller realizes the cruise plus-minus control, so that the vehicle CAN be controlled more easily and freely in the cruise running process, and the fatigue in the driving process is reduced;

4. the cruise control based on the CAN controller realizes the overtaking control logic in the cruise process, quickly responds to the requirement of an accelerator pedal in the cruise process, realizes quick overtaking and quick cruise recovery, and ensures the driving safety and the driving speed.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the present embodiments, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the present embodiments and together with the description serve to explain the present embodiments without unduly limiting the present embodiments.

Fig. 1 is a cruise control mode system composition diagram according to embodiment 1 of the present disclosure;

FIG. 2 is a logic diagram of an entering cruise and adjusting cruise control method according to embodiment 1 of the present disclosure;

FIG. 3 is a logic diagram of an exit cruise control method according to embodiment 1 of the present disclosure;

FIG. 4 is a logic diagram of a permanent exit cruise control method according to embodiment 1 of the present disclosure.

The specific implementation mode is as follows:

the present disclosure is further described with reference to the following drawings and examples.

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

Example 1:

as shown in fig. 1, the present disclosure provides a pure electric vehicle cruise control system based on a CAN controller, which is characterized by comprising a multifunctional steering wheel, a CAN controller, a vehicle control unit, a drive assembly, an accelerator pedal and a brake pedal; the multifunctional steering wheel is used for converting key signals of cruise enable, cruise exit, cruise + and cruise-into resistance signals; the CAN controller is used for converting the resistance signal into a CAN signal and generating a cruise command; the whole vehicle controller is used for identifying the cruise command and judging the opening degree of an accelerator pedal and the opening degree of a brake pedal; converting the cruise command into a target signal by combining the opening degree of an accelerator pedal and the opening degree of a brake pedal; the driving assembly is used for identifying the target signal and controlling the whole vehicle to enter a corresponding cruise mode.

In the present embodiment, the cruise modes include entering a cruise and trim cruise mode, temporarily exiting a cruise mode, and permanently exiting a cruise mode.

As shown in fig. 2, in the present embodiment, the specific operation process or content of the CAN controller entering the cruise mode and adjusting the cruise mode is as follows:

the multifunctional steering wheel sends a cruise enabling signal to a CAN controller by using a resistor, the CAN controller converts the resistor signal into a CAN signal and sends the CAN signal to a vehicle control unit, the vehicle control unit identifies the cruise enabling signal and starts to judge the current actual vehicle speed and the opening degree of a brake pedal, if the switch of the brake pedal is less than or equal to 5% and the current vehicle speed is greater than or equal to 40Km/h, the vehicle control unit enters a target vehicle speed control mode to enter a cruise mode by the average vehicle speed 10s before the cruise enabling signal is received, a combination instrument displays a cruise icon, the cruise icon is not entered, the condition that the switch of the brake pedal is less than or equal to 5% and the current vehicle speed is greater than or equal to 40Km/h is not met, the cruise control mode is not entered, and the whole control is requested according to the actual situation; after entering a cruise mode, if the whole vehicle controller receives cruise + CAN signal enable, the whole vehicle controller starts to judge, if the current vehicle speed is larger than or equal to the whole vehicle speed limit requirement, the whole vehicle runs according to the highest vehicle speed, if the current vehicle speed is smaller than the whole vehicle speed limit requirement, the whole vehicle controller adjusts the target vehicle speed, the target vehicle speed is increased by 1Km/h when 3 glossy privet messages are continuously received, after entering the cruise mode, if the whole vehicle controller receives cruise-CAN signal enable, the whole vehicle controller starts to judge, if the current vehicle speed is smaller than or equal to 40Km/h, the whole vehicle runs according to 40Km/h, if the current vehicle speed is larger than 40Km/h, the whole vehicle controller adjusts the target vehicle speed, and the target vehicle speed is reduced by 1Km/h when 3 glossy privet messages are continuously received.

As shown in fig. 3, in this embodiment, the specific operation process or content of entering the temporary cruise exiting mode by the CAN controller is as follows:

in a cruise mode, when the multifunctional steering wheel sends a cruise exit signal to the CAN controller by using a resistor, the CAN controller converts the resistor signal into a CAN signal and sends the CAN signal to the vehicle control unit, the vehicle control unit identifies the cruise exit signal, then the vehicle exits the cruise mode, enters a sliding mode under the condition of no intervention of an accelerator or a brake pedal, and sends a cruise enable signal to the CAN controller by using the resistor during the period when the accelerator or the brake pedal is not involved, the CAN controller converts the resistor signal into the CAN signal and sends the CAN signal to the vehicle control unit, and the vehicle control unit identifies the cruise enable signal, restores the cruise mode and re-intervenes according to the last exited cruise mode; under the cruise mode, when an accelerator pedal is involved and the driving torque required by the opening degree of the accelerator pedal is larger than the torque during cruise, the vehicle controller requests the torque according to the opening degree of the accelerator pedal to realize vehicle acceleration, and when the accelerator pedal is recovered to be smaller than the torque during cruise, the vehicle is recovered to the normal operation in the cruise mode.

As shown in fig. 4, in this embodiment, the specific operation process or content of entering the permanent exit cruise mode by the CAN controller is as follows:

under the cruise mode, when the vehicle controller detects that the intervention opening degree of a brake pedal is larger than 5%, the vehicle controller exits the cruise mode and responds to the brake torque to realize vehicle deceleration.

Example 2:

the embodiment provides a pure electric vehicle cruise control method based on a CAN controller, which adopts the pure electric vehicle cruise control system based on the CAN controller as described in embodiment 1, and mainly includes the following contents:

converting key signals of cruise enable, cruise exit, cruise + and cruise-into resistance signals;

converting the resistance signal into a CAN signal to generate a cruise command;

recognizing the cruise command, and judging the opening degree of an accelerator pedal and the opening degree of a brake pedal; converting the cruise command into a target signal by combining the opening degree of an accelerator pedal and the opening degree of a brake pedal;

and identifying the target signal and controlling the whole vehicle to enter a corresponding cruise mode.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and those skilled in the art can make various modifications and variations. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present embodiment should be included in the protection scope of the present embodiment.