Autonomous vehicle accelerator control system and method

Abstract

The invention relates to an autonomous vehicle accelerator control system and method. The autonomous vehicle accelerator control system comprises an accelerator pedal, an accelerator pedal position sensor, an engine electric control module, a throttle valve opening sensor, an electronic throttle valve body and an engine air inlet passage and further comprises an accelerator pedal signal switchingmodule, a reference voltage module, an accelerator pedal analog signal generating module, a microcontroller module, a CAN interface module, an upper computer communication interface module and a powermodule. No mechanical structure needs to be additionally mounted on the accelerator pedal, no electric control device needs to be additionally mounted on a throttle valve control loop, the compatibility of an autonomous vehicle is higher than that of an original vehicle, and the cost is low; and the control system still adopts an engine electric control system closed-loop control structure and strategies of the original vehicle, through a CAN, the information, such as the engine rotating speed and the vehicle speed, collected by the sensors of the vehicle is obtained and then fed back to an upper computer through a communication interface, closed-loop control of the upper computer is achieved advantageously, thus dual closed-loop control is achieved, the control precision is high, and theproperty is stable.

Description

technical field [0001] The present invention relates to the field of automatic driving of automobiles, and more particularly, to an accelerator control system and method for automatic driving automobiles. Background technique [0002] The automatic control of automobile throttle is a very important control link in the automatic driving of automobiles, especially for automobiles powered by fuel, the accelerator directly controls the engine speed, and then realizes the control of the driving speed of the automobile. Such as figure 1 As shown, the accelerator control of the existing fuel vehicles is mainly composed of an accelerator pedal, an accelerator pedal position sensor, an engine electronic control module, and an electronic throttle body. The accelerator pedal position sensor feeds back the driver's control intention to the engine electronic control module in the form of electrical signals, and the engine electronic control module then sends a control signal to the elec...

AI Technical Summary

Problems solved by technology

[0004] 1. In the transformation of automobile automatic driving, it is necessary to modify the existing accelerator control device of the automobile and install an additional mechanical structure to push the accelerator pedal. The structure is complex and the modification cost is high; it affects the aesthetics of the original car

[0005] 2. In the manual driving mode, the mechanical pushing mechanism of the accelerator pedal will produce a certain resistance to the original accelerator pedal of the car, which will affect the driving comfort

[0007] 1. In the control system, there are additional electronic control devices such as throttle motor controller, motor driver, and throttle opening motor in the throttle control circuit. The structure of the electronic control system is relatively complicated; and the throttle opening motor will frequently move when the car is running. , higher requirements on motor performance and motor driver, increasing the failure rate of the system

[0008] 2. The control system is an open-loop control system, which cannot accurately control the engine speed

Images