CN105691203A

CN105691203A - Identification method and protection scheme of mistaken automobile accelerator stepping

Info

Publication number: CN105691203A
Application number: CN201610065108.8A
Authority: CN
Inventors: 殷年久
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-01-23
Filing date: 2016-01-23
Publication date: 2016-06-22
Anticipated expiration: 2036-01-23
Also published as: CN105691203B

Abstract

The invention discloses a novel identification method of mistaken automobile accelerator stepping and a protection scheme based on the method. According to the analysis of mistaken accelerator stepping cases and mistaken stepping occurrence process, at the moment before mistaken stepping, a driver slightly steps on the brake and slowly drives the automobile (such as backing up or driving into and driving out of a parking place, and the like), after being suddenly stimulated, the driver quickly loosens the brake and heavily steps on the accelerator in panic, the automobile is accelerated rapidly, and serious consequences are caused. The time past from driver loosening the brake to stepping on the accelerator is adopted as the judgment reference, and during normal operation, the time required from unhurriedly loosening the brake to stepping on the accelerator and the time required from loosening the brake to stepping on the accelerator in a hurry has obvious difference, and through utilizing the difference, the identification method can easily and reliably identify whether the driver normally accelerates the automobile or mistakenly steps on the accelerator. When the situation of mistaken accelerator stepping is identified, an engine is locked at the idle speed, the rapid acceleration of the automobile is avoided, the driver can possibly step on the brake for remedy, and the serious consequences are avoided.

Description

A kind of mistake step on accelerator of vehicle recognition methods and protection scheme

Technical field

The present invention relates to the recognition methods of a kind of mistake step on accelerator of vehicle and the protection scheme based on the method, belong to technical field of vehicle safety。

Background technology

The example causing accident because of mis-accelerator pressing is seen in various media often, along with being continuously increased of Car ownership, the chance that non-professional driver drives gets more and more, similar accident also can increase therewith, the person and the property damages that cause car owner and society also can be increasing, and the active safety guard technology therefore developing automobile is very important。Published at present prevent the guard technology after mis-accelerator pressing and mis-accelerator pressing existing a lot, but be all individually present some defects, otherwise excessively complicated, and cost is high, does not have practicality；Reliability is not high, there is also additional risk。

Summary of the invention

The invention discloses the recognition methods of a kind of mis-accelerator pressing and the protection scheme based on the method。

Pass through the analysis to a large amount of mis-accelerator pressing cases and summary, it follows that mis-accelerator pressing cause the case of serious consequence to always occur in the automobile of automatic catch, and be when following state: during automobile inbound/outbound process, turnover parking stall time, reversing time, starting time, or under complex road condition during low speed slide。In the above-mentioned period, driver be all bar none right crus of diaphragm gently slam brake move vehicle lentamente, now due to the scaring of certain emergency situations and stimulation, driver wants to stop immediately, but owing to skilled not and scaring stimulate, ongoing for automobile motion owing to the pedal (actually brake pedal) currently stepped in subconsciousness, experience implies that he wants to stop and is necessary for stepping on another pedal, therefore foot promptly moves on to important place of laying equal stress on another pedal (actually gas pedal) and steps on。Mis-accelerator pressing there occurs like this, and automobile emergency accelerates preshoot or retrogressing。

Analysis according to the above mentioned facts is known, the eve that mis-accelerator pressing occurs, the right crus of diaphragm of driver slams brake pedal, then rapidly step on the throttle pedal in releasing of brake pedal important place of laying equal stress on, this with normal operating at leisure releasing of brake pedal pedal of stepping on the throttle again accelerate there is obvious time difference。After tested, in normal operating, the time that releasing of brake (brake lamp goes out) is operated (throttle position switch varies more than 10%) to throttle needs more than 0.5 second；And in alarmed quickly releasing of brake to time of step on the throttle (throttle position switch varies more than 30%) less than 0.2 second。The present invention make use of this significant time difference to propose a kind of brand-new mis-accelerator pressing recognition methods just, and devise the protection scheme of mis-accelerator pressing based on this method。

This protection scheme is made up of the brake switch of such as Fig. 1, throttle position switch, protection module, control unit of engine。Described protection module has function as shown in Figure 2: when brake is unclamped, and starts a timer, until timer, the throttle position switch semaphore lock being connected to control unit of engine is reached setting value (0.3～0.4 second) at idling mode simultaneously；If timer not yet reaches setting value (mis-accelerator pressing) when gas pedal is stepped on, then stop timing and keep the lock-out state of throttle position signal until being totally released gas pedal, protecting module resets。

Engine lock is fixed on idling when mis-accelerator pressing occurs by this protection scheme, it is to avoid automobile emergency acceleration so that driver have an opportunity " waking up suddenly " mend afterwards and to touch on the brake thus avoiding the generation of serious accident。Touching on the brake even if driver reacts too blunt could not benefit, owing to automobile does not suddenly accelerate, its consequence also can alleviate significantly。

When this protection scheme is applied to the improvement before automobile dispatches from the factory or in design, protection functions of modules being integrated in control unit of engine program, such that it is able to economize deprotection module (such as Fig. 3), zero cost realizes mis-accelerator pressing protection。

Automobile for bracing wire throttle, it is possible to be operated signal (such as Fig. 4) by detecting the change acquisition throttle of TPS, when identifying mis-accelerator pressing, it is possible to close fuel injector and force engine misses to obtain protection。

Accompanying drawing explanation

The structured flowchart of this protection scheme of Fig. 1。

Function (program) block diagram of this protection scheme of Fig. 2 protection module。

The structured flowchart of Fig. 3 this protection scheme embodiment two。

The structured flowchart of Fig. 4 this protection scheme embodiment three。

Detailed description of the invention

One example of embodiment is suitable in the transformation of the E-Gas automobile that dispatched from the factory。Constitute block diagram such as Fig. 1; protection modular circuit is with automobile circuit altogether; function (program) block diagram such as Fig. 2 of protection module; when brake pedal in brake switch is stepped on be high level be signally attached to protection the corresponding input of module; the two-way output signal line of accelerator pedal position sensor is blocked; the line of pedal side is connected to protects module input accordingly, and the line of control unit of engine side is connected to the protection corresponding outfan of module。

Two examples of embodiment are applicable to maker improvement before automobile dispatches from the factory or when designing。Constitute block diagram such as Fig. 3, be modified control unit of engine program, the function program of Fig. 2 is integrated in control unit of engine program, such that it is able to the mis-accelerator pressing that realizes of zero cost is protected。

Three examples of embodiment are applicable to the automobile of bracing wire throttle。The automobile of bracing wire throttle is not owing to having accelerator pedal position sensor, therefore instead TPS, the information that throttle is operated is obtained by detecting the change of the value of TPS, after going out mis-accelerator pressing by the identification being integrated into control unit of engine similar to example two with control procedure identification, fuel injector is closed, thus the urgency avoiding automobile is accelerated by control unit of engine。

Claims

1. a mistake step on accelerator of vehicle recognition methods, it is characterised in that including:

Step 1, starts a timer when brake pedal discharges；

Step 2, checks the value of timer when the accelerator pedal is operated；

Step 3, as described in step 2, the value of timer is less than setting value, then be identified as mis-accelerator pressing。

2. method according to claim 1, it is characterised in that obtained the release moment of brake pedal by brake switch state。

3. method according to claim 1, it is characterised in that obtain the information that gas pedal is operated by the change of the value of accelerator pedal position sensor or TPS。

4. method according to claim 1, it is characterised in that the setting value of described timer is 0.3～0.4 second。

5. the method according to claim 1 and 3, it is characterised in that described gas pedal is operated and refers to that the output valve of described accelerator pedal position sensor or TPS varies more than omnidistance 30%。

6. a mistake step on accelerator of vehicle protection scheme, including brake switch, throttle position switch, control unit of engine, it is characterised in that also include protection module；Brake pedal switch is signally attached to protection module；Accelerator pedal position sensor output is signally attached to protection module；Protection module output is connected to control unit of engine。

7. protection scheme according to claim 6, it is characterised in that described protection module, includes and is controlled by brake pedal switch signal and gas pedal steps on the timer of signal；Start timer when brake pedal discharges, protect the accelerator pedal position signal of module output to be locked in idle speed value during clocking value is less than setting value；Further, during clocking value is less than setting value, as gas pedal is operated, it is identified as mis-accelerator pressing；After identifying mis-accelerator pressing, timer stops timing, and the accelerator pedal position signal of protection module output will be kept and be locked in idle speed value, will not change along with the change of accelerator pedal position, until discharging gas pedal completely。

8. protection scheme according to claim 7, it is characterised in that described setting value is 0.3～0.4 second。

9. a mistake step on accelerator of vehicle protection scheme, including brake switch, throttle position switch, it is characterised in that also include control unit of engine；Described control unit of engine is integrated with mis-accelerator pressing identification and defence program。

10. protection scheme according to claim 9, it is characterised in that described mis-accelerator pressing identification and defence program, includes and is controlled by brake pedal switch signal and gas pedal steps on the timer of signal；Start timer when brake pedal discharges, during clocking value is less than setting value, throttle opening is locked in idle speed value；Further, during clocking value is less than setting value, as gas pedal is operated, it is identified as mis-accelerator pressing；After identifying mis-accelerator pressing, timer stops timing, and throttle opening will be kept and be locked in idle speed value, will not change along with the change of accelerator pedal position, until discharging gas pedal completely。