CN105620459B - Electric vehicle brake pedal diagnostic method and device - Google Patents
Electric vehicle brake pedal diagnostic method and device Download PDFInfo
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- CN105620459B CN105620459B CN201410714472.3A CN201410714472A CN105620459B CN 105620459 B CN105620459 B CN 105620459B CN 201410714472 A CN201410714472 A CN 201410714472A CN 105620459 B CN105620459 B CN 105620459B
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Abstract
A kind of electric vehicle brake pedal diagnostic method and device, the diagnostic method include：Obtain the first brake pedal switch state and the second brake pedal switch state；Judge whether the first brake pedal switch state and the second brake pedal switch state are identical；When the first brake pedal switch state and the second brake pedal switch state difference, during obtaining continuous n times brake pedal operation, corresponding first brake pedal switch state and the second brake pedal switch state, brake pedal operation are the operation loosened the brake after a brake pedal；During continuous n times brake pedal operation, when the corresponding first brake pedal switch state and the second brake pedal switch state are not exactly the same, judge that the brake pedal breaks down.Using the method and device, brake pedal fault misdescription can be efficiently reduced, so as to reduce traffic safety hidden danger.
Description
Technical field
The present invention relates to electric vehicle field more particularly to a kind of electric vehicle brake pedal diagnostic methods and device.
Background technology
With the pay attention to day by day to energy security and environmental protection problem, new-energy automobile, such as electric vehicle gradually into
Development trend for automobile now.Electric vehicle is travelled using on-vehicle battery as power using motor-driven vehicle.At present, it is electronic
The type of automobile includes pure electric automobile, hybrid vehicle and fuel cell car.
In electric vehicle, brake pedal signal is one of important input signal of electric automobile whole moment of torsion control,
In the brake pedal apparatus of automobile, the functions such as idle stop, braking energy feedback of electric vehicle are required for according to brake pedal
Signal is as input Rule of judgment, it is therefore desirable to which whether brake pedal signal is normally carried out diagnosing.
In the prior art, the brake switch hard signal that is usually received according to entire car controller judges brake pedal
Whether break down.For example, whether unanimously judge that brake pedal is according to the state for judging two-way brake switch hard signal
No failure, but do not account for verifying brake-pedal travel signal.Thus, existing brake pedal fault diagnosis side
There is the possibility of wrong report in method so that there are larger security risks for traffic safety.
Invention content
The embodiment of the present invention solves the problems, such as it is how to reduce brake pedal fault misdescription, reduces traffic safety hidden danger.
To solve the above problems, the embodiment of the present invention provides a kind of electric vehicle brake pedal diagnostic method, including：
Obtain the first brake pedal switch state and the second brake pedal switch state；Judge that first brake pedal is opened
Whether off status and the second brake pedal switch state are identical；When the first brake pedal switch state and described second
During brake pedal switch state difference, during obtaining continuous n times brake pedal operation, corresponding first brake pedal switch shape
State and the second brake pedal switch state, brake pedal operation is loosens the brake after a brake pedal
Operation；During continuous n times brake pedal operation, the corresponding first brake pedal switch state and the described second braking
When pedal switch state is not exactly the same, judge that the brake pedal breaks down.
Optionally, it after the judgement brake pedal breaks down, further includes：Control the traveling speed of the electric vehicle
Degree is less than pre-set velocity, and lights trouble light.
Optionally, it is described to judge whether are the first brake pedal switch state and the second brake pedal switch state
It is identical, including：When the brake pedal tips into or out, the first brake pedal switch state is triggering state and described
When second brake pedal switch state is non-triggering state or when the first brake pedal switch state for non-triggering state,
When the second brake pedal switch state is not in pre-set interval for triggering state and brake pedal position signal voltage value, sentence
The fixed first brake pedal switch state is different from the second brake pedal switch state.
Optionally, it before the first brake pedal switch state that obtains and the second brake pedal switch state, further includes：It obtains
The percent travel of brake pedal position is taken, the percent travel for obtaining brake pedal position includes：Detect the system
When dynamic pedal position changes, current brake pedal position signal voltage value is obtained；Brake pedal is obtained in initial position
Output voltage difference in the range of initial position signal voltage value and brake pedal effective travel；According to the current brake
Output voltage difference in the range of pedal position signal voltage value, initial position signal voltage value and the effective travel, meter
Calculate the percent travel of current brake pedal position.
Optionally, it is described according to the current brake pedal position signal voltage value, initial position signal voltage value and
Output voltage difference in the range of the effective travel calculates the percent travel of current brake pedal position, including：Using α
=(U-U0)/Δ U calculates the percent travel of current brake pedal position, wherein, α is the percentage of current brake pedal position
Stroke, U be current brake pedal position signal voltage value, U0For initial position signal voltage value, Δ U is the effective row of brake pedal
Output voltage difference in the range of journey.
To solve the problems, such as above-mentioned at least one of which, an embodiment of the present invention provides a kind of diagnosis of electric vehicle brake pedal
Device, including：
First acquisition unit, for obtaining the first brake pedal switch state and the second brake pedal switch state；
Judging unit, for judging that the first brake pedal switch state is with the second brake pedal switch state
It is no identical；
Second acquisition unit, for working as the first brake pedal switch state and the second brake pedal switch state
When different, during obtaining continuous n times brake pedal operation, corresponding first brake pedal switch state and the second braking are stepped on
Switching plate state, brake pedal operation are the operation loosened the brake after a brake pedal；
Identifying unit, during working as continuous n times brake pedal operation, the corresponding first brake pedal switch shape
When state and not exactly the same the second brake pedal switch state, judge that the brake pedal breaks down.
Optionally, the electric vehicle brake pedal diagnostic device further includes：Control unit, in the identifying unit
After judging that the brake pedal breaks down, the travel speed of the electric vehicle is controlled to be less than pre-set velocity, and light failure
Lamp.
Optionally, the first brake pedal switch state and the second brake pedal switch shape are obtained in the first acquisition unit
Before state, further include：Stroke acquiring unit, for when detecting that the brake pedal position changes, obtaining current system
Dynamic pedal position signal voltage value；Obtain brake pedal initial position signal voltage value and brake pedal in initial position
Output voltage difference in the range of effective travel；According to the current brake pedal position signal voltage value, initial position signal
Output voltage difference in the range of voltage value and the effective travel calculates the percent travel of current brake pedal position.
Compared with prior art, the technical solution of the embodiment of the present invention has the following advantages：
It is not directly to sentence after the first brake pedal switch state that detects and the second brake pedal switch state difference
Determine brake pedal failure, but during obtaining continuous n times brake pedal operation, corresponding first brake pedal switch shape
State and the second brake pedal switch state, only during continuous n times brake pedal operation, corresponding first brake pedal
When on off state and not exactly the same the second brake pedal switch state, just judge that brake pedal breaks down.It therefore can be with
The possibility of brake pedal fault misdescription is efficiently reduced, improves traffic safety.
Further, after judgement brake pedal breaks down, the travel speed of electric vehicle is controlled to be less than pre-set velocity simultaneously
Trouble light is lighted, can further improve the safety of driving.
In addition, by the output voltage difference in the range of brake pedal effective travel, current brake pedal position is calculated
Percent travel.Since the electric vehicle that the output voltage difference in the range of brake pedal effective travel corresponds to same vehicle is
Definite value, therefore the percent travel obtained when driver steps on identical stroke is equal, without being directed to each vehicle all
It goes to perform the operation that pedal travel percentage obtains.Also, simultaneously according to the first brake pedal switch state, the second brake pedal
On off state and brake pedal position judge the state of brake pedal, can further reduce brake pedal event
Hinder the possibility of wrong report.
Description of the drawings
Fig. 1 is a kind of flow chart of electric vehicle brake pedal diagnostic method in the embodiment of the present invention；
Fig. 2 is a kind of flow chart of electric vehicle brake pedal travel acquisition methods in the embodiment of the present invention；
Fig. 3 is a kind of structure diagram of electric vehicle brake pedal diagnostic device in the embodiment of the present invention.
Specific embodiment
It is understandable for the above-mentioned purpose of the embodiment of the present invention, feature and advantage is enable to become apparent, it is right below in conjunction with the accompanying drawings
Specific embodiments of the present invention are described in detail.
In the prior art, the brake switch hard signal that is usually received according to entire car controller judges brake pedal
Whether break down.For example, whether unanimously judge that brake pedal is according to the state for judging two-way brake switch hard signal
No failure, but do not account for verifying brake-pedal travel signal.Thus, existing brake pedal fault diagnosis side
There is the possibility of wrong report in method so that there are larger security risks for traffic safety.
For this problem, an embodiment of the present invention provides a kind of electric vehicle brake pedal diagnostic method, with reference to Fig. 1,
It is described in detail below by way of specific steps.
Step S101 obtains the first brake pedal switch state and the second brake pedal switch state.
In specific implementation, can whether current brake pedal position be detected by brake pedal position signal sensor
It changes.When detecting that brake pedal position changes, can obtain respectively the state of the first brake pedal switch with
And second brake pedal switch state, and perform step S102.
In embodiments of the present invention, the situation that brake pedal position changes can include following two：1) driver
Brake pedal；2) driver loosens the brake after brake pedal.Therefore, brake pedal position hair is being detected
During raw change, corresponding first brake pedal switch state and the second brake pedal switch state can be obtained.For example, it detects
After driver's brake pedal, corresponding first brake pedal switch state and the second brake pedal switch shape are obtained respectively
State, and perform step S102.
Step S102, judge the first brake pedal switch state and the second brake pedal switch state whether phase
Together.
It in specific implementation, can after the first brake pedal switch state and the second brake pedal switch state is got
To be first compared to the two, judge whether the two is identical.
When the first brake pedal switch state and the second brake pedal switch state difference, step S103 is performed；When
When one brake pedal switch state is identical with the second brake pedal switch state, then judge that current brake pedal does not break down.
In practical applications, in brake pedal or during loosening the brake, if brake pedal is in normal
State, then the first brake pedal switch state should should be identical with the second brake pedal switch state.For example, in brake pedal
In under normal circumstances, in brake pedal, the first brake pedal switch state is triggering state, and the second brake pedal is opened
Pass should also be in triggering state.Therefore, when the first brake pedal switch state is identical with the second brake pedal switch state,
It then can be determined that current brake pedal does not break down.
In an embodiment of the present invention, it when brake pedal, which is in, steps on state, is touched if the first brake pedal switch is in
Hair-like state and when the second brake pedal switch is in non-triggering state, the first brake pedal switch state of judgement is braked with second and is stepped on
Switching plate state is different, and there may be failures for brake pedal.Or when the first brake pedal switch is in non-triggering state, the second system
Dynamic pedal switch be in triggering state and when brake pedal position signal voltage is not in preset voltage range, and judgement first is made
Dynamic pedal switch state is different from the second brake pedal switch state, and there may be failures for brake pedal.
This is because：In practical applications, the trigger voltage of the first brake pedal switch is more than the second brake pedal switch
Trigger voltage.That is, the second brake pedal switch is triggered prior to the first brake pedal switch.Therefore in the first braking
When pedal switch is in triggering state, the second brake pedal switch should be triggered under normal circumstances, in other words,
One brake pedal switch is in triggering state and when the second brake pedal switch is in non-triggering state, then judges that brake pedal can
It can there are failures.
When the second brake pedal switch is in triggering state and the first brake pedal is in non-triggering state, in positive reason
Under condition, brake pedal position signal voltage should be less than a certain setting voltage value, for example, less than brake pedal position signal voltage
Maximum value.If detect at this time brake pedal position signal voltage be more than setting voltage value, judge brake pedal there may be
Failure.
Similar, when brake pedal is in releasing orientation, if the first brake pedal switch is in triggering state and
When two brake pedals are still in non-triggering state, the first brake pedal switch state of judgement and the second brake pedal switch state are not
Together.Or when the first brake pedal switch is in non-triggering state, the second brake pedal switch is in triggering state and brake pedal
When position signal voltage is not in preset voltage range, the first brake pedal switch state of judgement and the second brake pedal switch
State is different, and there may be failures for brake pedal.
This is because：In practical applications, when loosening the brake, under normal circumstances the first brake pedal switch prior to
Second brake pedal switch is transformed into non-toggle state from triggering state.Therefore, when the second brake pedal switch is in non-toggle
During state, if the first brake pedal switch, still in triggering state, judging brake pedal, there may be failures.In the first braking
When pedal switch is in non-triggering state, the second brake pedal switch is in triggering state, brake pedal position signal voltage reason
A certain voltage setting value is should be greater than, for example, brake pedal position signal minimum amount of voltage that.If brake pedal position signal electricity at this time
Pressure is less than the setting value, then judges that there may be failures for brake pedal.
In embodiments of the present invention, there may be a variety of causes the first brake pedal switch state to be opened with the second brake pedal
The different situation of off status.For example, the first brake pedal switch sensor breaks down, the second brake pedal switch sensor goes out
Situations such as existing failure or noise jamming, it is therefore desirable to perform step S103 and further be judged.
Step S103, when the first brake pedal switch state and the second brake pedal switch state difference,
During obtaining continuous n times brake pedal operation, corresponding first brake pedal switch state and the second brake pedal switch
State.
In specific implementation, it is different from the second brake pedal switch state in the first brake pedal switch state that detects
When, during electronic control unit (ECU) can obtain continuous n times brake pedal operation, brake pedal operation institute is right each time
The the first brake pedal switch state and the second brake pedal switch state answered.
In embodiments of the present invention, a brake pedal operation can be：Take-off the brake is stepped on after stepping on a brake pedal
The operation of plate.Therefore, the first brake pedal switch state during the brake pedal operation each time that ECU is got and
Two brake pedal switch states are：Corresponding first brake pedal switch state and the second brake pedal are opened during brake pedal
Off status and corresponding first brake pedal switch state and the second brake pedal switch state when loosening the brake.
In embodiments of the present invention, it can select to continuously acquire the number of brake pedal operation process according to actual conditions
N.For example, in an embodiment of the present invention, N=10.For another example, in an alternative embodiment of the invention, N=8.
Step S104, during continuous n times brake pedal operation, the first brake pedal switch state and described the
When two brake pedal switch states are not exactly the same, judge that the brake pedal breaks down.
In specific implementation, by step S103 it is found that during continuous n times brake pedal operation, corresponding to each time
Brake pedal operation, the first brake pedal switch state and the second brake pedal switch shape when can obtain brake pedal
State and the first brake pedal switch state and the second brake pedal switch state when loosening the brake.It is respectively compared and is stepping on
Lower brake pedal and when loosening the brake, corresponding two-way brake pedal switch state whether all same.
If during continuous n times brake pedal operation, corresponding to brake pedal operation each time, in brake pedal mistake
In journey or during loosening the brake, corresponding first brake pedal switch state and the second brake pedal switch state are not
It is identical, then it can be determined that current brake pedal breaks down.
As it can be seen that after the first brake pedal switch state that detects and the second brake pedal switch state difference, it is not
Directly judgement brake pedal breaks down, but during obtaining continuous n times brake pedal operation, corresponding first brake pedal
On off state and the second brake pedal switch state, only during continuous n times brake pedal operation, corresponding first system
When dynamic pedal switch state and not exactly the same the second brake pedal switch state, just judge that brake pedal breaks down.Cause
This can efficiently reduce the possibility of brake pedal fault misdescription, improve traffic safety.
In embodiments of the present invention, after judging that current brake pedal breaks down in step S104, pacify for driving
The considerations of complete, can control the travel speed of vehicle to be less than a preset safety value, and light trouble lamp and driven to remind
The failure of personnel's current brake pedal position signal is sailed, currently continuing driving, there may be security risks, need to exclude in time
Current the reason of breaking down.It is understood that there may also be state progress of other control methods to current vehicle
Control.
In embodiments of the present invention, can a safe speed be set according to practical demand, for example, safety can be set
Speed is 40km/h, and safe speed can also be set safe speed can also to be set as to other values, herein no longer for 30km/h
It repeats.
In practical applications, most of brake pedal systems are to increase stroke on the basis of traditional mechanical braking pedal
Sensor transformation forms, and there is no being verified to stroke sensor, the brake pedal position stroke obtained is caused simultaneously can not
It leans on, it is therefore desirable to mutually be verified brake pedal switch and brake pedal position stroke.
It therefore,, can be first to brake pedal position stroke before being diagnosed to brake pedal in the embodiment of the present invention
It is verified, to obtain accurate brake-pedal travel.With reference to Fig. 2, an embodiment of the present invention provides a kind of electric vehicle brakes
Pedal travel acquisition methods, are described in detail below by way of specific steps.
Step S201 when detecting that the brake pedal position changes, obtains current brake pedal position signal electricity
Pressure value.
In embodiments of the present invention, it can detect whether brake pedal position occurs by brake pedal position sensor
Variation and changed degree, when brake pedal position changes, brake pedal position sensor can obtain phase
The brake pedal position signal voltage value answered.
It is effective to obtain brake pedal initial position signal voltage value and brake pedal in initial position by step S202
Output voltage difference in stroke.
In embodiments of the present invention, brake pedal initial position can refer to that brake pedal is in residing when not stressing state
Position.Brake pedal corresponding brake pedal position in initial position can be obtained by brake pedal position sensor to believe
Number voltage value.
In embodiments of the present invention, it can be directed to the different vehicle of same vehicle in advance, obtain brake pedal effective travel
Interior output voltage difference.
Step S203, according to the current brake pedal position signal voltage value, initial position signal voltage value and institute
The output voltage difference in the range of effective travel is stated, calculates the percent travel of current brake pedal position.
In embodiments of the present invention, α=(U-U may be used0)/Δ U calculates the percentage row of current brake pedal position
Journey, wherein, α be current brake pedal position percent travel, U be current brake pedal position signal voltage value, U0It is first
Beginning position signal voltage value, Δ U are the output voltage difference in the range of brake pedal effective travel.
And in practical applications, the stroke percentage for calculating current brake pedal position is carried out by equation below：
β=(U-U0)/(U1-U0),
Wherein, U1The corresponding signal voltage value of final position is in for brake pedal.
However, in practical applications, corresponding to each vehicle of same vehicle, corresponding U1It is possible and unequal,
Therefore, in the stroke percentage for calculating current brake pedal position, corresponding to different vehicles, even if brake-pedal travel phase
Deng the possible difference of stroke percentage of the brake pedal position of acquisition.And in embodiments of the present invention, since brake pedal is effective
Output voltage difference DELTA U in stroke range is a fixed value, therefore for different vehicles, equal in brake-pedal travel
When, corresponding brake-pedal travel percentage is also identical, so that the energy regenerating torque of identical platform different vehicle
And electricity (E-Creep) torque of creeping is with uniformity.
It can be seen that by the output voltage difference in the range of brake pedal effective travel, current brake pedal position is calculated
The percent travel put.Since the output voltage difference in the range of brake pedal effective travel corresponds to the electronic vapour of same vehicle
Vehicle is definite value, therefore the percent travel obtained when driver steps on identical stroke is equal, without being directed to each
Vehicle all goes to perform the operation that pedal travel percentage obtains.
After the completion of step S203 execution, can further according to the brake pedal position stroke got, to brake pedal into
Row diagnosis that is, after the completion of step S203 execution, performs step S101~step S104, so as to further reduce failure
The possibility of wrong report.
With reference to Fig. 3, an embodiment of the present invention provides a kind of electric vehicle brake pedal diagnostic device 30, including：First obtains
Unit 301, judging unit 302, second acquisition unit 303 and identifying unit 304 are taken, wherein：
First acquisition unit 301, for obtaining the first brake pedal switch state and the second brake pedal switch state；
Judging unit 302, for judging the first brake pedal switch state and the second brake pedal switch shape
Whether state is identical；
Second acquisition unit 303, for working as the first brake pedal switch state and second brake pedal switch
During state difference, during obtaining continuous n times brake pedal operation, corresponding first brake pedal switch state and the second system
Dynamic pedal switch state, a brake pedal operation are the operation loosened the brake after a brake pedal；
Identifying unit 304, during working as continuous n times brake pedal operation, corresponding first brake pedal is opened
When off status and not exactly the same the second brake pedal switch state, judge that the brake pedal breaks down.
In specific implementation, the electric vehicle brake pedal diagnostic device 30 can also include：Control unit 305 is used
In after the identifying unit 304 judges that the brake pedal breaks down, the travel speed of the electric vehicle is controlled to be less than
Pre-set velocity, and light trouble light.
In specific implementation, the electric vehicle brake pedal diagnostic device 30 can also include：Stroke acquiring unit
306, for the first acquisition unit 301 obtain the first brake pedal switch state and the second brake pedal switch state it
Before, when detecting that the brake pedal position changes, obtain current brake pedal position signal voltage value；Obtain braking
Output voltage difference of the pedal in initial position in the range of initial position signal voltage value and brake pedal effective travel；
In the range of the current brake pedal position signal voltage value, initial position signal voltage value and the effective travel
Output voltage difference calculates the percent travel of current brake pedal position.
One of ordinary skill in the art will appreciate that all or part of step in the various methods of above-described embodiment is can
It is completed with instructing relevant hardware by program, which can be stored in a computer readable storage medium, storage
Medium can include：ROM, RAM, disk or CD etc..
Although present disclosure is as above, present invention is not limited to this.Any those skilled in the art are not departing from this
It in the spirit and scope of invention, can make various changes or modifications, therefore protection scope of the present invention should be with claim institute
Subject to the range of restriction.
Claims (5)
1. a kind of electric vehicle brake pedal diagnostic method, which is characterized in that including：
Obtain the first brake pedal switch state and the second brake pedal switch state；
Judge whether the first brake pedal switch state and the second brake pedal switch state are identical；
When the first brake pedal switch state and the second brake pedal switch state difference, continuous n times system is obtained
During dynamic pedal operation, corresponding first brake pedal switch state and the second brake pedal switch state are primary to brake
Pedal operation is the operation loosened the brake after brake pedal；It is right during continuous n times brake pedal operation
When the first brake pedal switch state answered and not exactly the same the second brake pedal switch state, described in judgement
Brake pedal breaks down；
It is wherein, described to judge whether the first brake pedal switch state and the second brake pedal switch state are identical,
Including：When the brake pedal tips into or out, the first brake pedal switch state is triggering state and described second
When brake pedal switch state is non-triggering state or when the first brake pedal switch state is non-triggering state, described
When second brake pedal switch state is not in pre-set interval for triggering state and brake pedal position signal voltage value, institute is judged
It is different from the second brake pedal switch state to state the first brake pedal switch state；
Before the first brake pedal switch state that obtains and the second brake pedal switch state, further include：Obtain brake pedal
The percent travel of position, the percent travel for obtaining brake pedal position include：
When detecting that the brake pedal position changes, current brake pedal position signal voltage value is obtained；Obtain braking
Output voltage difference of the pedal in initial position in the range of initial position signal voltage value and brake pedal effective travel；
According to the current brake pedal position signal voltage value, initial position signal voltage value and the effective travel range
Interior output voltage difference calculates the percent travel of current brake pedal position.
2. electric vehicle brake pedal diagnostic method as described in claim 1, which is characterized in that the judgement braking is stepped on
After plate breaks down, further include：The travel speed of the electric vehicle is controlled to be less than pre-set velocity, and light trouble light.
3. electric vehicle brake pedal diagnostic method as described in claim 1, which is characterized in that described according to the current system
Output voltage difference in the range of dynamic pedal position signal voltage value, initial position signal voltage value and the effective travel,
The percent travel of current brake pedal position is calculated, including：Using α=(U-U0)/Δ U calculates current brake pedal position
Percent travel, wherein, α is the percent travel of current brake pedal position, and U is current brake pedal position signal voltage
Value, U0For initial position signal voltage value, Δ U is the output voltage difference in the range of brake pedal effective travel.
4. a kind of electric vehicle brake pedal diagnostic device, which is characterized in that including：
First acquisition unit, for obtaining the first brake pedal switch state and the second brake pedal switch state；Judging unit,
For judging whether the first brake pedal switch state and the second brake pedal switch state are identical；
Second acquisition unit, it is different from the second brake pedal switch state for working as the first brake pedal switch state
When, during obtaining continuous n times brake pedal operation, corresponding first brake pedal switch state and the second brake pedal are opened
Off status, brake pedal operation are the operation loosened the brake after a brake pedal；
Identifying unit, during working as continuous n times brake pedal operation, the corresponding first brake pedal switch state with
When the second brake pedal switch state is not exactly the same, judge that the brake pedal breaks down；
Before the first acquisition unit obtains the first brake pedal switch state and the second brake pedal switch state, also wrap
It includes：Stroke acquiring unit, for when detecting that the brake pedal position changes, obtaining current brake pedal position letter
Number voltage value；Obtain brake pedal initial position signal voltage value and brake pedal effective travel range in initial position
Interior output voltage difference；According to the current brake pedal position signal voltage value, initial position signal voltage value and institute
The output voltage difference in the range of effective travel is stated, calculates the percent travel of current brake pedal position.
5. electric vehicle brake pedal diagnostic device as claimed in claim 4, which is characterized in that further include：Control unit is used
It is preset in the travel speed of the electric vehicle after the identifying unit judges that the brake pedal breaks down, is controlled to be less than
Speed, and light trouble light.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410714472.3A CN105620459B (en) | 2014-11-28 | 2014-11-28 | Electric vehicle brake pedal diagnostic method and device |
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| CN201410714472.3A CN105620459B (en) | 2014-11-28 | 2014-11-28 | Electric vehicle brake pedal diagnostic method and device |
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| CN107487226B (en) * | 2017-04-21 | 2019-09-20 | 宝沃汽车（中国）有限公司 | Control method, device and the electric car of electric vehicle brake initial pedal position |
| CN110553572B (en) * | 2018-05-30 | 2024-06-28 | 泰科电子(上海)有限公司 | Sensing device for vehicle brake pedal, sensor for vehicle brake pedal and sensing method |
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| CN109373945A (en) * | 2018-09-20 | 2019-02-22 | 北京海纳川汽车部件股份有限公司 | The position sensor test device and vehicle testing system of pedal of vehicles |
| CN109656166A (en) * | 2018-12-12 | 2019-04-19 | 北京长城华冠汽车科技股份有限公司 | The brake signal processing system and its control method of vehicle, vehicle |
| CN110341682B (en) * | 2019-07-31 | 2020-12-15 | 广州小鹏汽车科技有限公司 | Fault diagnosis method and device for electric automobile brake switch |
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| CN114715109B (en) * | 2021-01-05 | 2023-11-24 | 广汽埃安新能源汽车有限公司 | Fault diagnosis method, device and vehicle for vehicle brake switch |
| CN113246739A (en) * | 2021-06-17 | 2021-08-13 | 中国第一汽车股份有限公司 | Hybrid power vehicle and brake control method thereof |
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