阅读说明：本技术 一种基于纯电动车系统的油门踏板控制动力方法 (Power control method for accelerator pedal based on pure electric vehicle system ) 是由 王伟健 孙健 田伟 李江 顾红星 于 2020-05-25 设计创作，主要内容包括：本发明公开了一种基于纯电动车系统的油门踏板控制动力方法,步骤如下：步骤一：处理油门踏板给定的信号；步骤二：动力响应的状态根据整车控制器接收到的仪表信息来进行适时函数的变换,给出驾驶者所需的真实动力响应踏板值。本发明基于纯电动车系统的油门踏板控制动力方法直接可通过在现有的电动控制系统添加优化策略项进行优化,没有额外的成本项,实用度高,条件限制少,只要给定指令(通过仪表或者硬线开关)就能满足车辆在不同的环境所需的驱动控制。(The invention discloses a power control method of an accelerator pedal based on a pure electric vehicle system, which comprises the following steps: the method comprises the following steps: processing signals given by an accelerator pedal; step two: and the power response state is converted according to the instrument information received by the vehicle controller, so that the real power response pedal value required by the driver is given. The method for controlling the power of the accelerator pedal based on the pure electric vehicle system can be directly optimized by adding an optimization strategy item to the existing electric control system, has no additional cost item, high practicability and few condition limitations, and can meet the driving control of the vehicle in different environments as long as a given instruction (through an instrument or a hard-wire switch) is given.)

1. A power control method of an accelerator pedal based on a pure electric vehicle system is characterized by comprising the following steps: the method comprises the following steps:

the method comprises the following steps: processing signals given by an accelerator pedal;

step two: and the power response state is converted according to the instrument information received by the vehicle controller, so that the real power response pedal value required by the driver is given.

2. The accelerator pedal control power method based on the pure electric vehicle system as claimed in claim 1, wherein: the first step is as follows:

firstly, the electric pedal signals received by the vehicle control unit are divided according to the range of (0-1), specific percentage values are sent to an instrument, and then the vehicle control unit carries out filtering processing on the processed signals.

3. The method for controlling power of the accelerator pedal based on the pure electric vehicle system as claimed in claim 2, wherein: the filtering process is to adjust the pedal value of the given power by adjusting the specific gravity of the current opening and the specific gravity of the opening before change,

a current opening + (1-a) opening before change is output as a pedal signal

Note: a is more than 0 and less than 1; a can be calibrated as a coefficient for adjusting the 'meat feeling' of the pedal.

4. The method for controlling power of the accelerator pedal based on the pure electric vehicle system as claimed in claim 3, wherein: in the second step: if the control mode of the power is a conventional mode, the real power response pedal value, namely the accelerator response signal, is equal to the output value after the pedal filtering, namely the pedal output signal, and the formula is expressed as follows:

y＝x；

and y is throttle response signal.

And x is the pedal output signal.

5. The method for controlling power of the accelerator pedal based on the pure electric vehicle system as claimed in claim 3, wherein: in the second step: if the control mode of the power is energy-saving response, the formula is expressed as:

throttle response signal

x is pedal output signal

a, calibrating the trend of change speed and range (0, 1)

b, the minimum pedal output capacity capable of controlling the response.

6. The method for controlling power of the accelerator pedal based on the pure electric vehicle system as claimed in claim 3, wherein: if the control mode of the power is the power response, the formula is expressed as:

throttle response signal

x is pedal output signal

a, calibrating the trend of change speed and range (0, 1)

b, the minimum pedal output capacity capable of controlling the response.

The technical field is as follows:

the invention relates to a power control method of an accelerator pedal based on a pure electric vehicle system, and belongs to the technical field of electric vehicles.

Background art:

the stepping on the accelerator pedal is a main means of automobile power output, and the good accelerator pedal control method can improve the driving comfort of a driver and the consistency of power output. With the rapid development of modern new energy vehicles, the control mode of the traditional fuel system is directly transplanted to a pure electric vehicle, which cannot meet the requirements of different customers and different road conditions.

Therefore, there is a need to improve the prior art to overcome the deficiencies of the prior art.

The invention content is as follows:

the invention provides a power control method of an accelerator pedal based on a pure electric vehicle system, which aims to solve the problems in the prior art and can reduce the influence of signal interference in the accelerator pedal on the power performance.

The technical scheme adopted by the invention is as follows: a power control method of an accelerator pedal based on a pure electric vehicle system comprises the following steps:

the method comprises the following steps: processing signals given by an accelerator pedal;

step two: and the power response state is converted according to the instrument information received by the vehicle controller, so that the real power response pedal value required by the driver is given.

Further, the step one is as follows:

firstly, the electric pedal signals received by the vehicle control unit are divided according to the range of (0-1), specific percentage values are sent to an instrument, and then the vehicle control unit carries out filtering processing on the processed signals.

Further, the filtering process is to adjust the pedal value of the given power by adjusting the specific gravity of the current opening and the specific gravity of the opening before the change,

a current opening + (1-a) opening before change is output as a pedal signal

Note: a is more than 0 and less than 1; a can be calibrated to adjust the coefficient of the 'meat feeling' of the pedal.

Further, in the second step: if the control mode of the power is a conventional mode, the real power response pedal value, namely the accelerator response signal, is equal to the output value after the pedal filtering, namely the pedal output signal, and the formula is expressed as follows:

y＝x；

and y is throttle response signal.

x is pedal output signal

Further, in the second step: if the control mode of the power is energy-saving response, the formula is expressed as:

throttle response signal

x is pedal output signal

a, calibrating the trend of change speed and range (0, 1)

b, the minimum pedal output capacity capable of controlling the response.

Further, if the control mode of the power is the power response, the formula is expressed as:

throttle response signal

x is pedal output signal

a, calibrating the trend of change speed and range (0, 1)

b, the minimum pedal output capacity capable of controlling the response.

The invention has the following beneficial effects:

(1) the power control method of the accelerator pedal based on the pure electric vehicle system can be directly optimized by adding an optimization strategy item to the existing electric control system, and no additional cost item exists;

(2) the accelerator pedal control power method based on the pure electric vehicle system has high practicability and few condition limitations, and can meet the driving control of the vehicle in different environments as long as a given instruction (through an instrument or a hard-wire switch) is given.

Description of the drawings:

FIG. 1 is a flow chart of power output control by an accelerator pedal.

FIG. 2 is a flow chart of the control power output function.

FIG. 3 is a pedal processing function graph.

The specific implementation mode is as follows:

the invention will be further described with reference to the accompanying drawings.

The invention relates to a power control method of an accelerator pedal based on a pure electric vehicle system, which mainly comprises the following steps: the main body control is placed in a vehicle control unit for control, the vehicle control unit responds the magnitude of torque force timely required through a low-order or high-order function relationship after filtering processing is carried out on a received pedal signal, and the approximate relationship is shown in the following figure 1.

The invention relates to a power control method of an accelerator pedal based on a pure electric vehicle system, which comprises the following specific steps of:

the method comprises the following steps: processing signals given by an accelerator pedal

Firstly, dividing a pedal electric signal received by the vehicle control unit according to the range of (0-1) and sending a specific percentage value to an instrument, and then filtering the processed signal by the vehicle control unit; the filtering process is implemented by adjusting the pedal value of the given power by adjusting the proportion of the current opening value and the proportion of the opening before change (which can be the average opening of the previous times), so that the adjustment has the advantage of filtering out signal interference or dynamic interference caused by rapid acceleration.

a current opening + (1-a) opening before change is output as a pedal signal

Note: a is more than 0 and less than 1; and a can be calibrated to be a coefficient for adjusting the 'meat feeling' of the pedal, wherein the meat feeling coefficient is the influence degree of the signal acquired by the current pedal on the change value of the system pedal.

Step two: the state of the power response needs to be transformed by a timely function according to instrument information (control mode) received by the vehicle controller, so that a real power response pedal value required by a driver is given. As indicated above, if the control mode of power is normal, then the true power response pedal value (throttle response signal) is equal to the pedal filtered output value (pedal output signal), and the formula is expressed as:

y＝x；

and y is throttle response signal.

x is pedal output signal

Step three: if the vehicle is in a congested road section in a city, the energy-saving response mode is more suitable for the road condition. The accelerator acceleration during starting can be adjusted by adjusting the parameter a (the energy-saving response is characterized by slow starting, fast later acceleration and particularly suitable for the driving requirement of a congested road section), the maximum output torque force of the motor (namely the output power of the motor) can be adjusted by adjusting the parameter b, and the formula is expressed as follows:

throttle response signal

x is pedal output signal

a, calibrating the trend of change speed and range (0, 1)

b, the minimum pedal output capacity capable of controlling the response.

Step four: the power response is convenient for coping with the road condition of a driver in a mountain area, and the torque force required by the driver is larger than that required by the driver in a normal state due to the complex road condition and more ramps. The dynamic response is relatively in line with the requirements (the response is fast in the early period, the sent opening value is large, the change rate in the middle and later periods is small and stable), wherein the acceleration of the accelerator during starting can be adjusted by adjusting the parameter a, the pedal opening interval during equivalent maximum opening can be adjusted by adjusting the parameter b, and the formula is expressed as follows:

throttle response signal

x is pedal output signal

a, calibrating the trend of change speed and range (0, 1)

b, the minimum pedal output capacity capable of controlling the response.

As shown in FIG. 3, the following analysis is performed on the polynomial scaling parameters a & b of the "energy saving" response and the "power" response (note: where the "energy saving" response and the "power" response parameter a are expressed in different ranges):

1. the smaller the value of the parameter a in the response of energy saving, the steeper the curve change (i.e. the more obvious the trend of changing slowly before and quickly) meets the condition of slow reaction. The parameter b is used to adjust the maximum value that can be reached in the curve, thus limiting the maximum torque capacity that the motor can output in a "power-save" response.

2. The condition of fast reaction is met by the fact that the curve changes more steeply (i.e., the trend of changing "fast before slow" is more obvious) for the larger value of the parameter a in the "dynamic" response. The parameter b is used to adjust the minimum value that can be achieved in the curve, thereby ensuring the minimum required torque force capability for the motor output in the "power" response.

The foregoing is only a preferred embodiment of this invention and it should be noted that modifications can be made by those skilled in the art without departing from the principle of the invention and these modifications should also be considered as the protection scope of the invention.