CN104895687A

CN104895687A - Vehicle electronic accelerator pedal mistaken stepping prevention control system

Info

Publication number: CN104895687A
Application number: CN201510248391.3A
Authority: CN
Inventors: 石振东; 郝琪; 刘璟琨; 袁宗亮
Original assignee: Hubei University of Automotive Technology
Current assignee: Hubei University of Automotive Technology
Priority date: 2015-05-16
Filing date: 2015-05-16
Publication date: 2015-09-09

Abstract

The invention provides a vehicle electronic accelerator pedal mistaken stepping prevention control system, which analyzes whether control behaviors of an accelerator pedal are abnormal, and enables accelerator signals of the accelerator pedal to lose efficacy in a mistaken stepping state, wherein a position sensor of an electronic accelerator panel is connected with a microcomputer through an analog/digital conversion module, the microcomputer is connected with an engine electronic control unit (ECU) through the analog/digital conversion module, the analog/digital conversion module is used to convert analog position signals which are output through the position sensor of the accelerator pedal into digital value position signals, and is used to convert digital value signals which are converted by the microcomputer into analog quantity signals, the microcomputer receives the digital value position signals, is combined with position control thresholds which are preset by the microcomputer, compares the digital value position signals and the position control thresholds, and judges whether the control behaviors of the accelerator pedal belongs to mistaken stepping, and the analog/digital conversion module is used to convert digital information which is output by the microcomputer into prospective analog signals.

Description

A kind of vehicle electric accelerator pedal Anti-mis-stepping control system

Technical field

The invention belongs to vehicle driving security fields, particularly relate to a kind of vehicle electric accelerator pedal Anti-mis-stepping control system.

Background technique

Accelerator pedal is also known as accelerator pedal, and its effect is the air inflow regulating motor, thus changes the device of fuel injection quantity, by controlling the rotating speed of motor, improve or reduce the power of motor, finally realize the object of regulation speed, generally by driver's right crus of diaphragm stampede operation.During steering vehicle, because driver's right crus of diaphragm needs control two pedals, both brake petal and accelerator pedal, the effect of the two is just contrary, General Requirements is not when vehicle accelerates, right crus of diaphragm is placed on brake petal, for the difference of driving habits, even if the driver be skilled in technique, be also difficult to avoid, in the unexpected situation of burst, will speed up pedal by mistake and stepping on rapidly as brake petal, not only do not have the effect of braking, make vehicle produce larger driving force on the contrary, cause the pernicious upgrading of traffic accident, lead to serious consequence.

At present, for electronic accelerator pedal, pedal position sensor is arranged on accelerator pedal inside, and the position signal of pedal position sensor is directly to Engine ECU, output control signals to servomotor by Engine ECU, and servomotor controls throttle execution mechanism.The electronic accelerator pedal proposed at present steps on solution by mistake, after stepping on state by ECU (Electrical Control Unit) identification by mistake, vehicle is made to produce emergency braking by other devices, although such scheme can solve the emergency processing that accelerator pedal is stepped on to a certain extent by mistake, but pedal is stepped on and is not equal to emergency brake by mistake, therefore in actual applications once occur stepping on operating mode erroneous judgement or because stepping on operation under non-burst fortuitous event by mistake, the emergency braking of vehicle will directly cause the generation of out of control or rear-end collision by mistake.

Summary of the invention

The invention provides a kind of vehicle electric accelerator pedal Anti-mis-stepping control system, recorded electronic formula accelerator pedal position, analyze accelerator pedal manipulation behavior whether abnormal, accelerator pedal signal for faster was lost efficacy stepping under state by mistake.

Technological scheme of the present invention is: a kind of vehicle electric accelerator pedal Anti-mis-stepping control system, is characterized in that: comprise microprocessor, analog/digital conversion module, D/A switch module; The position transducer of electronic accelerator pedal is connected with microprocessor by analog/digital conversion module, microprocessor is connected with Engine ECU by D/A switch module, and the analog amount position signal that described D/A switch module exports for the position transducer that will speed up pedal is converted to digital quantity position signal; The digital quantity signal that described D/A switch module is used for microprocessor transmits is converted to analog signals;

Microprocessor receives digital quantity position signal, in conjunction with the positioning control threshold value that microprocessor is preset, comparative figures amount position signal and positioning control threshold value, differentiate whether accelerator pedal manipulation behavior belongs to step on, described D/A switch module is used for the analog signals quantity word information that microprocessor exports being converted to expection by mistake.

Beneficial effect of the present invention: accelerator pedal export analog amount position signal through analog/digital conversion module transfer to microprocessor, by microprocessor in conjunction with preset positioning control threshold value, realize resolving to sampled signal, judge whether accelerator pedal exists abnormal manipulation behavior, under stepping on state by mistake, microprocessor output accelerator pedal does not trample digital quantity signal during state, analog signals is become by D/A switch module converts, to Engine ECU, calculate one and control signal to servomotor relay, servomotor relay is in turnoff state, servomotor does not drive throttle execution mechanism, accelerator pedal signal for faster lost efficacy.This invention effectively avoids the serious consequence produced under accelerator pedal steps on situation by mistake, embody the thinking that misoperation is invalid, have the advantages that reliability is high, easy to use and practical, and the vehicle application of existing all types of electronic type accelerator accelerator pedal can be widely used in.

Accompanying drawing explanation

Fig. 1 is the structural representation of a kind of vehicle electric accelerator pedal of the present invention Anti-mis-stepping control system.

Embodiment

Below in conjunction with drawings and Examples, the invention will be further described.

As shown in Figure 1, a kind of vehicle electric accelerator pedal Anti-mis-stepping control system, comprise microprocessor 3, analog/digital conversion module 2, D/A switch module 4, the position transducer 1 of electronic accelerator pedal is connected with microprocessor 3 by analog/digital conversion module 2, microprocessor 3 is connected with Engine ECU 5 by D/A switch module 4, and the analog position signal that described D/A switch module 2 exports for the position transducer 1 that will speed up pedal is converted to digital quantity position signal; Microprocessor 3 receives digital quantity position signal, in conjunction with the positioning control threshold value that microprocessor is preset, comparative figures amount position signal and positioning control threshold value, differentiate whether accelerator pedal manipulation behavior belongs to step on, described D/A switch module 4 is converted to the analog signals of expection for the quantity word information exported by microprocessor by mistake.

Digital quantity position signal is no more than preset positioning control threshold value, and microprocessor 3 directly passes through D/A switch module 4 modulus of conversion analog quantity signal the digital quantity position signal received, and exports Engine ECU (control unit) 5 to; Digital quantity position signal exceedes preset positioning control threshold value, belong to and step on state by mistake, microprocessor 3 exports digital quantity signal when accelerator pedal does not trample state, is converted to analog signals when accelerator pedal does not trample state, exports Engine ECU 5 to by D/A switch module 4.

Control thinking of the present invention: by mistake stepping under state, the analog signals no matter electronic accelerator pedal 1 exports is any state, microprocessor 3 all drives D/A switch module 4 to generate the analog signals of electronic accelerator pedal 1 when not trampling state, and the effect of lifting engine drive power accelerator pedal being stepped on by mistake cause lost efficacy.

Claims

1. a vehicle electric accelerator pedal Anti-mis-stepping control system, it is characterized in that: comprise microprocessor, analog/digital conversion module, D/A switch module, the position transducer of electronic accelerator pedal is connected with microprocessor by analog/digital conversion module, microprocessor is connected with Engine ECU by D/A switch module, and the analog amount position signal that described D/A switch module exports for the position transducer that will speed up pedal is converted to digital quantity position signal; The digital quantity signal that described D/A switch module is used for microprocessor transmits is converted to analog signals;

2. a kind of vehicle electric accelerator pedal Anti-mis-stepping control system according to claim 1, it is characterized in that: digital quantity position signal is no more than preset positioning control threshold value, microprocessor directly passes through D/A switch module converts analog signals the digital quantity position signal received, and exports Engine ECU to; Digital quantity position signal exceedes preset positioning control threshold value, belong to and step on state by mistake, microprocessor exports digital quantity signal when accelerator pedal does not trample state, by D/A switch module converts be accelerator pedal do not trample state time analog signals, export Engine ECU to.