CN102897164A - Brake pedal diagnosing method for hybrid electric vehicle - Google Patents
Brake pedal diagnosing method for hybrid electric vehicle Download PDFInfo
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- CN102897164A CN102897164A CN2012103620914A CN201210362091A CN102897164A CN 102897164 A CN102897164 A CN 102897164A CN 2012103620914 A CN2012103620914 A CN 2012103620914A CN 201210362091 A CN201210362091 A CN 201210362091A CN 102897164 A CN102897164 A CN 102897164A
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Abstract
The invention relates to a brake pedal diagnosing method for hybrid electric vehicle. When a brake light signal and a brake signals exceed time T1 asynchronously, the number is increased by 1 on a counter C1, and when the C1 is accumulated to exceed Z1, the error if unreasonable signal can be reported, and the fault can be diagnosed. The brake pedal diagnosing method has the beneficial effects that according to the asynchronous deviation data of the brake light signal and the brake signal, a brake pedal is detected, meanwhile, after the fault of the brake pedal is diagnosed, the vehicle is in a limping homing mode, so that the safety rung of the vehicle is effectively protected.
Description
Technical field
The present invention relates to the Development of HEV Technology field, relate in particular to a kind of brake pedal diagnostic method of hybrid vehicle.
Background technology
Along with the attention to energy security and environmental protection problem in the world constantly promotes, various countries require more and more stricter to automotive emissions, reduce the dependence to the energy, realize energy-saving and emission-reduction, have become world economy sustainable development problem in the urgent need to address.Hybrid vehicle, pure electric automobile have become the trend of current auto-domain development.Oil-electric vehicle combines motor and driving engine; realized rational energy saving and emission reduction effects for each operating mode; idle stop, electric motor starting, intelligent charge, regenerative brake, motor power-assisted, the electronic mixed moving function such as creep; having relatively advantages of higher of the oil consumption of reduction, increase continual mileage, technology maturity, is the first-selected trend of present China Automobile Industry.
Driving engine and motor are two propulsions source in the hybrid vehicle, hybrid controller (HCU) is the core of car load control, the main control of being responsible between coordination engine management system (EMS) and the electric machine controller (MCU), and and the moment of torsion of gearbox control system (TCU) coordinate, to realize good driving performance and the energy optimization of vehicle.
Wherein, the diagnostic method of brake pedal also is one of gordian technique in field of hybrid electric vehicles, and it is also making constant progress.In hybrid vehicle control, brake pedal is as one of most important input of car load moment of torsion, and the safe operation of vehicle is had significant impact.Brake pedal diagnostic logic by perfect can guarantee the safe operation of vehicle.
Summary of the invention
The brake pedal diagnostic method that the purpose of this invention is to provide a kind of hybrid vehicle, to solve after brake pedal uses the long period, the situation of brake signal and epoch deviation asynchronous with the stoplight stop lamp signal, the technical matters that need to detect fault.
The objective of the invention is to be achieved through the following technical solutions:
A kind of brake pedal diagnostic method of hybrid vehicle, after described vehicle control system powers on until under the system between the electricity, all the time carry out the diagnosis of brake pedal, brake pedal has two paths of signals: brake signal and stoplight stop lamp signal, and two paths of signals is switching value, stoplight stop lamp signal and brake signal should be synchronous in theory, but because the deviation of making and installing, the two can not Complete Synchronization.In certain deviation range, the nonsynchronous probability of two signals is very little.Stoplight stop lamp signal and brake signal should be synchronous when normal, have surpassed the T1 time if two signals are asynchronous, when counting machine C1 will increase the cumulative Z1 of surpassing of 1, C1, will quote the unreasonable mistake of signal.
After brake pedal was diagnosed out this fault, vehicle entered limp-home mode, and actv. has been protected the safe in operation of vehicle.
Preferably, the scope of T1 is 5 ~ 15 seconds, and the scope of Z1 is 20 ~ 50 seconds.
Beneficial effect of the present invention is: the present invention is according to stoplight stop lamp signal and the nonsynchronous time deviation of brake signal; brake pedal is detected, simultaneously, after brake pedal is diagnosed out this fault; vehicle can enter limp-home mode, effectively protects vehicle operating safety.
Description of drawings
The below is described in further detail the present invention with reference to the accompanying drawings.
Fig. 1 is stoplight stop lamp signal and the brake signal curve synoptic diagram of the brake pedal diagnostic method of the described a kind of hybrid vehicle of the embodiment of the invention.
The specific embodiment
The basic structure of hybrid vehicle is known by those skilled in the art to be known, gives unnecessary details no longer one by one at this.The brake pedal diagnostic method of hybrid vehicle is mainly controlled by the HCU on the hybrid vehicle and is finished.
As shown in Figure 1, in the brake pedal diagnostic method of this embodiment, be divided into 2 different phase processes, can finish the diagnosis of brake pedal by this two stages.Brake pedal need to have two paths of signals, brake signal and stoplight stop lamp signal, and two paths of signals is switching value.
Until under the system between the electricity, carry out all the time the diagnosis of brake pedal, in incipient state, the manipulator did not step on brake pedal after vehicle control system powered on, and brake pedal is in idling mode; When stepping on brake pedal, two-way brake pedal signal is exported to the hybrid vehicle whole-control system, and the hybrid vehicle whole-control system is diagnosed pedal signal, and described diagnosis comprises:
When 1) normally travelling, stoplight stop lamp signal and brake signal are synchronous, and when breaking down, stoplight stop lamp signal and brake signal are asynchronous and data deviation occurs;
2) stoplight stop lamp signal and brake signal are asynchronous has surpassed the T1 time, when counting machine C1 will increase the cumulative Z1 of surpassing of 1, C1, will quote the unreasonable mistake of signal, and diagnosis is out of order, and the scope of T1 is 5 ~ 15s, and the scope of Z1 is 20 ~ 50s.
In above two phase process, demarcate by this diagnostic method and to each T1 and Z1, guarantee that brake pedal can quote fault by failure-free; can not report by mistake simultaneously; after brake pedal was diagnosed out this fault, vehicle entered limp-home mode, and actv. has been protected the safe in operation of vehicle.
The present invention is not limited to above-mentioned preferred forms; anyone can draw other various forms of products under enlightenment of the present invention; no matter but do any variation in its shape or structure; every have identical with a application or akin technical scheme, all drops within protection scope of the present invention.
Claims (5)
1. the brake pedal diagnostic method of a hybrid vehicle, its feature exists, and the method comprises:
Surpassed the T1 time when the stoplight stop lamp signal is asynchronous with brake signal, when counting machine C1 will increase the cumulative Z1 of surpassing of 1, C1, will quote the unreasonable mistake of signal, diagnosis is out of order.
2. the brake pedal diagnostic method of hybrid vehicle according to claim 1, it is characterized in that: brake signal and stoplight stop lamp signal are switching value.
3. the brake pedal diagnostic method of hybrid vehicle according to claim 2, it is characterized in that: the scope of T1 is 5 ~ 15s, the scope of Z1 is 20 ~ 50.
4. the brake pedal diagnostic method of hybrid vehicle according to claim 3 is characterized in that: before the electricity, carry out all the time the diagnosis of brake pedal after vehicle control system powers on until under the system.
5. the brake pedal diagnostic method of each described hybrid vehicle according to claim 1-4, it is characterized in that: after brake pedal was diagnosed out this fault, vehicle entered limp-home mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210362091.4A CN102897164B (en) | 2012-09-25 | 2012-09-25 | A kind of brake pedal diagnostic method of hybrid vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210362091.4A CN102897164B (en) | 2012-09-25 | 2012-09-25 | A kind of brake pedal diagnostic method of hybrid vehicle |
Publications (2)
| Publication Number | Publication Date |
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| CN102897164A true CN102897164A (en) | 2013-01-30 |
| CN102897164B CN102897164B (en) | 2015-07-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210362091.4A Expired - Fee Related CN102897164B (en) | 2012-09-25 | 2012-09-25 | A kind of brake pedal diagnostic method of hybrid vehicle |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104842990A (en) * | 2014-10-24 | 2015-08-19 | 北汽福田汽车股份有限公司 | Vehicle brake detection system and method |
| CN105620459A (en) * | 2014-11-28 | 2016-06-01 | 上海汽车集团股份有限公司 | Electric vehicle brake pedal diagnosing method and device |
| CN106594267A (en) * | 2015-10-16 | 2017-04-26 | 北汽福田汽车股份有限公司 | Emergency down-shift mechanism used for vehicle and vehicle having same |
| CN111959414A (en) * | 2020-07-20 | 2020-11-20 | 浙江零跑科技有限公司 | Method for diagnosing brake lamp switch of electric passenger vehicle |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101595021A (en) * | 2006-11-30 | 2009-12-02 | 博世株式会社 | Brake switch failure diagnostic method and brake switch failure diagnostic device |
| CN101595020A (en) * | 2006-11-30 | 2009-12-02 | 博世株式会社 | Brake switch failure diagnostic method and brake switch failure diagnostic device |
| CN102490717A (en) * | 2011-12-20 | 2012-06-13 | 奇瑞汽车股份有限公司 | Brake switch control system for electric automobile, and control method and fault diagnosis method for brake switch control system |
-
2012
- 2012-09-25 CN CN201210362091.4A patent/CN102897164B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101595021A (en) * | 2006-11-30 | 2009-12-02 | 博世株式会社 | Brake switch failure diagnostic method and brake switch failure diagnostic device |
| CN101595020A (en) * | 2006-11-30 | 2009-12-02 | 博世株式会社 | Brake switch failure diagnostic method and brake switch failure diagnostic device |
| CN102490717A (en) * | 2011-12-20 | 2012-06-13 | 奇瑞汽车股份有限公司 | Brake switch control system for electric automobile, and control method and fault diagnosis method for brake switch control system |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104842990A (en) * | 2014-10-24 | 2015-08-19 | 北汽福田汽车股份有限公司 | Vehicle brake detection system and method |
| CN105620459A (en) * | 2014-11-28 | 2016-06-01 | 上海汽车集团股份有限公司 | Electric vehicle brake pedal diagnosing method and device |
| CN105620459B (en) * | 2014-11-28 | 2018-06-29 | 上海汽车集团股份有限公司 | Electric vehicle brake pedal diagnostic method and device |
| CN106594267A (en) * | 2015-10-16 | 2017-04-26 | 北汽福田汽车股份有限公司 | Emergency down-shift mechanism used for vehicle and vehicle having same |
| CN111959414A (en) * | 2020-07-20 | 2020-11-20 | 浙江零跑科技有限公司 | Method for diagnosing brake lamp switch of electric passenger vehicle |
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|---|---|
| CN102897164B (en) | 2015-07-29 |
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Granted publication date: 20150729 Termination date: 20200925 |