CN102897164B - A kind of brake pedal diagnostic method of hybrid vehicle - Google Patents
A kind of brake pedal diagnostic method of hybrid vehicle Download PDFInfo
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- CN102897164B CN102897164B CN201210362091.4A CN201210362091A CN102897164B CN 102897164 B CN102897164 B CN 102897164B CN 201210362091 A CN201210362091 A CN 201210362091A CN 102897164 B CN102897164 B CN 102897164B
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- 238000002405 diagnostic procedure Methods 0.000 title claims abstract description 13
- 238000003745 diagnosis Methods 0.000 claims abstract description 9
- 230000001186 cumulative effect Effects 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000001360 synchronised effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
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- 230000001172 regenerating effect Effects 0.000 description 1
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- Hybrid Electric Vehicles (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The present invention relates to a kind of brake pedal diagnostic method of hybrid vehicle, exceeded the T1 time when stoplight stop lamp signal is asynchronous with brake signal, counting machine C1 will increase by 1, C1 cumulative more than Z1 time, will quote the unreasonable mistake of signal, diagnosis is out of order.Beneficial effect of the present invention: the present invention, according to stoplight stop lamp signal and the nonsynchronous deviation data of brake signal, detects brake pedal, and meanwhile, after brake pedal diagnoses out this fault, vehicle can enter limp-home mode, available protecting vehicle operating safety.
Description
Technical field
The present invention relates to Development of HEV Technology field, particularly relate to a kind of brake pedal diagnostic method of hybrid vehicle.
Background technology
Along with constantly promoting the attention of energy security and environmental protection problem in the world, various countries require more and more stricter to automotive emissions, reduce the dependence to the energy, realize energy-saving and emission-reduction, become the problem that world economy sustainable development is in the urgent need to address.Hybrid vehicle, pure electric automobile have become the trend of current auto-domain development.Motor and driving engine combine by oil-electric vehicle; rational energy saving and emission reduction effects is achieved for each operating mode; idle stop, electric motor starting, intelligent charge, regenerative brake, motor power-assisted, the electronic mixed dynamic function such as to creep; there is reduction oil consumption, increase continual mileage, technology maturity compares advantages of higher, is the first-selected trend of current China Automobile Industry.
In hybrid vehicle, driving engine and motor are two propulsions source, hybrid controller (HCU) is the core of full-vehicle control, primary responsibility coordinates the control between engine management system (EMS) and electric machine controller (MCU), and and the torque coordination of gearbox control system (TCU), to realize the good driving performance of vehicle and energy optimization.
Wherein, the diagnostic method of brake pedal is also one of gordian technique in field of hybrid electric vehicles, and it is also making constant progress.In hybrid vehicle controls, brake pedal, as one of the most important input of car load moment of torsion, has significant impact to the safe operation of vehicle.By perfect brake pedal diagnostic logic, the safe operation of vehicle can be ensured.
Summary of the invention
The object of this invention is to provide a kind of brake pedal diagnostic method of hybrid vehicle, to solve after brake pedal uses the long period, brake signal and the situation of epoch deviation asynchronous with stoplight stop lamp signal, needs the technical matters detected fault.
The object of the invention is to be achieved through the following technical solutions:
A kind of brake pedal diagnostic method of hybrid vehicle, until under system between electricity after described vehicle control system powers on, all the time the diagnosis of brake pedal is performed, 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 due to the deviation manufactured and install, 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, if two signals are asynchronous exceeded the T1 time, counting machine C1 will increase by 1, C1 cumulative more than Z1 time, the unreasonable mistake of signal will be quoted.
After brake pedal diagnoses out this fault, vehicle enters limp-home mode, and actv. protects 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, meanwhile, after brake pedal diagnoses out this fault; vehicle can enter limp-home mode, available protecting vehicle operating safety.
Accompanying drawing explanation
With reference to the accompanying drawings the present invention is described in further detail below.
Fig. 1 is stoplight stop lamp signal and the brake signal curve synoptic diagram of the brake pedal diagnostic method of a kind of hybrid vehicle described in the embodiment of the present invention.
Detailed description of the invention
The basic structure of hybrid vehicle is known by those skilled in the art know, and this is no longer going to repeat them.The brake pedal diagnostic method of hybrid vehicle has controlled primarily of the HCU on hybrid vehicle.
As shown in Figure 1, in the brake pedal diagnostic method of this embodiment, be divided into 2 different phase processes, the diagnosis of brake pedal can be completed by this two stages.Brake pedal needs two paths of signals, brake signal and stoplight stop lamp signal, and two paths of signals is switching value.
Until under system between electricity after vehicle control system powers on, perform the diagnosis of brake pedal all the time, in incipient state, manipulator does not step on brake pedal, and brake pedal is in idling mode; When stepping on brake pedal, two-way brake pedal signal exports to hybrid electric vehicle whole-control system, and hybrid electric vehicle whole-control system is diagnosed pedal signal, and described diagnosis comprises:
1) when normally travelling, stoplight stop lamp signal and brake signal are synchronous, and when a failure occurs, stoplight stop lamp signal is asynchronous with brake signal and occur data deviation;
2) stoplight stop lamp signal is asynchronous with brake signal has exceeded the T1 time, counting machine C1 will increase by 1, C1 cumulative more than Z1 time, will quote the unreasonable mistake of signal, diagnosis is out of order, and the scope of T1 is the scope of 5 ~ 15s, Z1 is 20 ~ 50s.
In above two phase process, by this diagnostic method, each T1 and Z1 is demarcated, guarantee that brake pedal can quote fault by failure-free; can not report by mistake simultaneously; after brake pedal diagnoses out this fault, vehicle enters limp-home mode, and actv. protects 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 any change is done in its shape or structure; every have identical with the application or akin technical scheme, all drops within protection scope of the present invention.
Claims (2)
1. a brake pedal diagnostic method for hybrid vehicle, its feature exists, and the method comprises:
The T1 time has been exceeded when stoplight stop lamp signal is asynchronous with brake signal, counting machine C1 will increase by 1, C1 cumulative more than Z1 time, the unreasonable mistake of signal will be quoted, diagnosis is out of order, when the diagnosis rear vehicle that is out of order enters limp-home mode, wherein, the scope of T1 is 5 ~ 15s, the scope of Z1 is 20 ~ 50, further, after vehicle control system powers on until under system before electricity, the diagnosis of brake pedal is performed all the time.
2. the brake pedal diagnostic method of hybrid vehicle according to claim 1, is characterized in that: brake signal and stoplight stop lamp signal are switching value.
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 |
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| Publication Number | Publication Date |
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| CN102897164A CN102897164A (en) | 2013-01-30 |
| CN102897164B true CN102897164B (en) | 2015-07-29 |
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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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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104842990B (en) * | 2014-10-24 | 2017-09-15 | 北汽福田汽车股份有限公司 | The braking performance test system and method for vehicle |
| 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 |
| CN111959414B (en) * | 2020-07-20 | 2021-10-22 | 浙江零跑科技股份有限公司 | 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 |
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- 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 |
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| CN102897164A (en) | 2013-01-30 |
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Granted publication date: 20150729 Termination date: 20200925 |