CN107298089A - The diagnostic method and device of vehicle brake fault - Google Patents
The diagnostic method and device of vehicle brake fault Download PDFInfo
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- CN107298089A CN107298089A CN201710535218.0A CN201710535218A CN107298089A CN 107298089 A CN107298089 A CN 107298089A CN 201710535218 A CN201710535218 A CN 201710535218A CN 107298089 A CN107298089 A CN 107298089A
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- brake
- master cylinder
- wheel deceleration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/18—Safety devices; Monitoring
- B60T17/22—Devices for monitoring or checking brake systems; Signal devices
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- Transportation (AREA)
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- Valves And Accessory Devices For Braking Systems (AREA)
- Regulating Braking Force (AREA)
Abstract
The invention provides a kind of diagnostic method and device of vehicle brake fault, it is related to the fault diagnosis technology field of vehicle, this method includes obtaining the wheel deceleration signal and brake signal of vehicle to be diagnosed, wherein, brake signal at least includes one below：Master cylinder pressure signal, pedal travel signal；According to brake signal and wheel deceleration signal, it is determined that vehicle to be diagnosed whether there is brake fault.The present invention alleviates the technical problem for the efficient diagnosis method for lacking vehicle brake fault in the prior art.
Description
Technical field
The present invention relates to the fault diagnosis technology field of vehicle, more particularly, to a kind of diagnostic method of vehicle brake fault
And device.
Background technology
Automobile electronic stabilization system (Electronic Stability Control, abbreviation ESC) is that a kind of auxiliary drives
Person controls the active safety technologies of vehicle, and the unstability that it can be automatically to vehicle body is corrected, helps to prevent the hair of accident
It is raw, it is the new active safety system of vehicle.
Master cylinder pressure sensor is installed, for detecting the pressure signal of master cylinder, to assist ESC system in ESC system
Carry out the control for brake of active.However, sensor is powered, the factors such as shakiness, sensor self-defect can frequently result in pressure signal
Drifting fault.In addition, burn into vibration, collision that external environment triggers etc. can cause brake piping signal to reveal failure again.Pressure
Signal drift failure and brake piping signal leakage failure can all cause a series of problems of brakes, the ESC systems of such as vehicle
System is intervened by mistake, and brakes supercharging is not enough, or ESC system control is excessive, so that threatening the safety of driver.
For above-mentioned vehicle brake fault, effective diagnostic techniques is lacked in the prior art.
The content of the invention
In view of this, it is an object of the invention to provide a kind of diagnostic method and device of vehicle brake fault, to alleviate
Lack the technical problem of the efficient diagnosis method of vehicle brake fault in the prior art.
In a first aspect, the embodiments of the invention provide a kind of diagnostic method of vehicle brake fault, including：
Obtain the wheel deceleration signal and brake signal of vehicle to be diagnosed, wherein, the brake signal at least include with
It is one of lower：Master cylinder pressure signal, pedal travel signal；
According to the brake signal and the wheel deceleration signal, it is determined that the vehicle to be diagnosed is with the presence or absence of braking event
Barrier.
With reference in a first aspect, the embodiments of the invention provide the possible embodiment of the first of first aspect, wherein,
In the case that the brake signal includes the master cylinder pressure signal, believed according to the brake signal and the wheel deceleration
Number, it is determined that the vehicle to be diagnosed whether there is brake fault, including：
Obtain the first default incidence relation between master cylinder pressure and wheel deceleration in the vehicle to be diagnosed；
According to the master cylinder pressure signal, the wheel deceleration signal and the first default incidence relation, it is determined that
The master cylinder pressure sensor of the vehicle to be diagnosed whether there is pressure signal drifting fault, wherein, the brake fault includes
The pressure signal drifting fault, the master cylinder pressure sensor is used to detect the master cylinder pressure signal.
With reference to the first possible embodiment of first aspect, the embodiments of the invention provide second of first aspect
Possible embodiment, wherein, according to the master cylinder pressure signal, the wheel deceleration signal and the first default pass
Connection relation, it is determined that the master cylinder pressure sensor of the vehicle to be diagnosed whether there is pressure signal drifting fault, including：
According to the wheel deceleration signal, the nominal pressure value of master cylinder is calculated by the described first default incidence relation；
According to the master cylinder pressure signal, the pressure sensor measured value of master cylinder is determined；
The difference between the nominal pressure value and the pressure sensor measured value is calculated, the first result is obtained；
Judge whether first result is more than the first predetermined threshold value；
If it is judged that first result is more than first predetermined threshold value, it is determined that the master cylinder of the vehicle to be diagnosed
There is the pressure signal drifting fault in pressure sensor.
With reference in a first aspect, the embodiments of the invention provide the possible embodiment of the third of first aspect, wherein,
In the case that the brake signal includes the pedal travel signal, believed according to the brake signal and the wheel deceleration
Number, it is determined that the vehicle to be diagnosed whether there is brake fault, including：
Obtain the second default incidence relation between pedal travel and wheel deceleration in the vehicle to be diagnosed；
According to the pedal travel signal, the wheel deceleration signal and the second default incidence relation, it is determined that
The brake piping of the vehicle to be diagnosed whether there is signals leakiness failure, wherein, the brake fault is let out including the signal
Leak failure.
With reference to the third possible embodiment of first aspect, the embodiments of the invention provide the 4th of first aspect kind
Possible embodiment, wherein, according to the pedal travel signal, the wheel deceleration signal and the second default pass
Connection relation, it is determined that the brake piping of the vehicle to be diagnosed whether there is signals leakiness failure, including：
According to the pedal travel signal, name wheel deceleration value is calculated by the described second default incidence relation；
According to the wheel deceleration signal, wheel deceleration measured value is determined；
The difference between the name wheel deceleration value and the wheel deceleration measured value is calculated, the second result is obtained；
Judge whether second result is more than the second predetermined threshold value；
If it is judged that second result is more than second predetermined threshold value, it is determined that the braking of the vehicle to be diagnosed
There is the signals leakiness failure in pipeline.
With reference in a first aspect, the embodiments of the invention provide the possible embodiment of the 5th of first aspect kind, wherein,
After the wheel deceleration signal and brake signal that obtain vehicle to be diagnosed, methods described also includes：
According to the wheel deceleration signal or the brake signal, judge the vehicle to be diagnosed whether in braking shape
State, also, judge whether electric stabilizing system control function is not triggered；
Vehicle diagnose is being judged in on-position and does not trigger the situation of electric stabilizing system control function
Under, execution is described according to the brake signal and the wheel deceleration signal, it is determined that the vehicle to be diagnosed is with the presence or absence of system
The step of dynamic failure.
With reference in a first aspect, the invention provides the possible embodiment of the 6th of first aspect kind, wherein, according to institute
Brake signal and the wheel deceleration signal are stated, after determining that the vehicle to be diagnosed has a brake fault, methods described
Also include：
Perform following at least one operation：Alarm lamp operation is lighted, brake fault code operation is stored, brake fault is sent
Information is operated.
Second aspect, the embodiment of the present invention also provides a kind of diagnostic device of vehicle brake fault, including：
Acquisition module, wheel deceleration signal and brake signal for obtaining vehicle to be diagnosed, wherein, the braking letter
Number at least include one below：Master cylinder pressure signal, pedal travel signal；
Determining module, for according to the brake signal and the wheel deceleration signal, it is determined that the vehicle to be diagnosed
With the presence or absence of brake fault.
With reference to second aspect, the embodiments of the invention provide the possible embodiment of the first of second aspect, wherein, institute
Stating determining module includes：
First acquisition unit, in the case of including the master cylinder pressure signal in the brake signal, obtains described
The first default incidence relation in vehicle to be diagnosed between master cylinder pressure and wheel deceleration；
First determining unit, for according to the master cylinder pressure signal, the wheel deceleration signal and described first
Default incidence relation, it is determined that the master cylinder pressure sensor of the vehicle to be diagnosed whether there is pressure signal drifting fault, wherein,
The brake fault includes the pressure signal drifting fault, and the master cylinder pressure sensor is used to detect the master cylinder pressure letter
Number.
With reference to the first possible embodiment of second aspect, the embodiments of the invention provide second of second aspect
Possible embodiment, wherein, first determining unit is used for：
According to the wheel deceleration signal, the nominal pressure value of master cylinder is calculated by the described first default incidence relation；
According to the master cylinder pressure signal, the pressure sensor measured value of master cylinder is determined；
The difference between the nominal pressure value and the pressure sensor measured value is calculated, the first result is obtained；
Judge whether first result is more than the first predetermined threshold value；
If it is judged that first result is more than first predetermined threshold value, it is determined that the master cylinder of the vehicle to be diagnosed
There is the pressure signal drifting fault in pressure sensor.
With reference to second aspect, the embodiments of the invention provide the possible embodiment of the third of second aspect, wherein, institute
Stating determining module includes：
First acquisition unit, it is second pre- between pedal travel and wheel deceleration for obtaining in the vehicle to be diagnosed
If incidence relation；
First determining unit, for according to the pedal travel signal, the wheel deceleration signal and described second
Default incidence relation, it is determined that the brake piping of the vehicle to be diagnosed whether there is signals leakiness failure, wherein, the braking event
Barrier includes the signals leakiness failure.
With reference to the third possible embodiment of second aspect, the embodiments of the invention provide the 4th of second aspect kind
Possible embodiment, wherein, second determining unit is used for：
According to the pedal travel signal, name wheel deceleration value is calculated by the described second default incidence relation；
According to the wheel deceleration signal, wheel deceleration measured value is determined；
The difference between the name wheel deceleration value and the wheel deceleration measured value is calculated, the second result is obtained；
Judge whether second result is more than the second predetermined threshold value；
If it is judged that second result is more than second predetermined threshold value, it is determined that the braking of the vehicle to be diagnosed
There is the signals leakiness failure in pipeline.
With reference to second aspect, the embodiments of the invention provide the possible embodiment of the 5th of second aspect kind, wherein, institute
Stating device also includes：
Judge module, for after the wheel deceleration signal and brake signal of vehicle to be diagnosed is obtained, according to described
Wheel deceleration signal or the brake signal, judge that whether the vehicle to be diagnosed is in on-position, also, judge electronics
Whether systems stabilisation control function is not triggered；
Wherein, the vehicle to be diagnosed is being judged in on-position and electric stabilizing system control function is not triggered
In the case of, perform the determining module described according to the brake signal and the wheel deceleration signal, it is determined that described treat
Diagnose the step of vehicle whether there is brake fault.
With reference to second aspect, the embodiment of the present invention additionally provides the 6th kind of possible embodiment of second aspect, wherein,
Described device also includes：
Diagnostic result processing module, for being believed in the determining module according to the brake signal and the wheel deceleration
Number, after determining that vehicle diagnose has a brake fault, perform following at least one operate：Alarm lamp operation is lighted,
Brake fault code operation is stored, the operation of brake fault information is sent.
The embodiment of the present invention brings following beneficial effect：The wheel deceleration signal and braking for obtaining vehicle to be diagnosed are believed
Number, wherein, wheel deceleration signal carries the degree information that the rotating speed of wheel reduces, and brake signal carries vehicle brake assemblies
Brake applications information, in view of in the brakes of each car the brake applications of brake component and wheel wheel speed reduce degree it
Between have default incidence relation, thus brake signal and wheel deceleration signal by getting, it is possible to it is determined that braking letter
Whether the incidence relation number between wheel deceleration signal meets default incidence relation, so that it is determined that whether vehicle to be diagnosed is deposited
In brake fault, the technical problem for the efficient diagnosis method for lacking vehicle brake fault in the prior art is alleviated.
Other features and advantages of the present invention will be illustrated in the following description, also, partly be become from specification
Obtain it is clear that or being understood by implementing the present invention.The purpose of the present invention and other advantages are in specification, claims
And specifically noted structure is realized and obtained in accompanying drawing.
To enable the above objects, features and advantages of the present invention to become apparent, preferred embodiment cited below particularly, and coordinate
Appended accompanying drawing, is described in detail below.
Brief description of the drawings
, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical scheme of the prior art
The accompanying drawing used required in embodiment or description of the prior art is briefly described, it should be apparent that, in describing below
Accompanying drawing is some embodiments of the present invention, for those of ordinary skill in the art, before creative work is not paid
Put, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of diagnostic method flow chart for vehicle brake fault that the embodiment of the present invention one is provided；
Fig. 2 is one kind of the offer of the embodiment of the present invention one according to master cylinder pressure signal, wheel deceleration signal and first
Default incidence relation, it is determined that the master cylinder pressure sensor of vehicle to be diagnosed whether there is the method flow of pressure signal drifting fault
Figure；
Fig. 3 is one kind of the offer of the embodiment of the present invention one according to pedal travel signal, wheel deceleration signal and second
Default incidence relation, it is determined that the brake piping of vehicle to be diagnosed whether there is the method flow diagram of signals leakiness failure；
Fig. 4 is the diagnostic method flow chart for another vehicle brake fault that the embodiment of the present invention one is provided；
Fig. 5 is a kind of diagnostic device structural representation for vehicle brake fault that the embodiment of the present invention two is provided；
Fig. 6 is the diagnostic device structural representation for another vehicle brake fault that the embodiment of the present invention two is provided.
Icon：100- acquisition modules；200- judge modules；300- determining modules；400- diagnostic result processing modules.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with accompanying drawing to the present invention
Technical scheme be clearly and completely described, it is clear that described embodiment is a part of embodiment of the invention, rather than
Whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creative work premise
Lower obtained every other embodiment, belongs to the scope of protection of the invention.
Pressure signal drifting fault and brake piping signal leakage failure can all cause a series of problems of brakes, with
The safety of threat driver is caused, in the prior art for above two brake fault, lacks effective diagnostic techniques.Based on this,
The embodiment of the present invention provides a kind of diagnostic method and device of vehicle brake fault, can alleviate shortage vehicle system in the prior art
The technical problem of the efficient diagnosis method of dynamic failure.
Embodiment one
A kind of diagnostic method of vehicle brake fault provided in an embodiment of the present invention, as shown in figure 1, including：
Step S102, obtains the wheel deceleration signal and brake signal of vehicle to be diagnosed, wherein, brake signal is at least wrapped
Include one below：Master cylinder pressure signal, pedal travel signal；
Step S104, according to brake signal and wheel deceleration signal, it is determined that vehicle to be diagnosed whether there is brake fault.
Specifically, wheel deceleration signal carries the degree information that the rotating speed of wheel reduces, and brake signal carries vehicle
The brake applications information of brake component, in view of the brake applications of brake component and the wheel speed of wheel subtract in the brakes of each car
There are default incidence relation, thus brake signal and wheel deceleration signal by getting between small degree, it is possible to really
Whether the incidence relation determined between brake signal and wheel deceleration signal meets default incidence relation.
After determining that vehicle to be diagnosed has brake fault or vehicle to be diagnosed in the absence of brake fault, terminate this
The secondary diagnostic method using above-mentioned vehicle brake fault carries out the process that brake fault is diagnosed to vehicle.
In embodiments of the present invention, by the brake signal and wheel deceleration signal that get, it is determined that vehicle to be diagnosed
With the presence or absence of brake fault, the technical problem for the efficient diagnosis method for lacking vehicle brake fault in the prior art is alleviated.
In one optional embodiment of the embodiment of the present invention, in the case where brake signal includes master cylinder pressure signal,
According to brake signal and wheel deceleration signal, it is determined that vehicle to be diagnosed whether there is brake fault, including：
Obtain the first default incidence relation between master cylinder pressure and wheel deceleration in vehicle to be diagnosed；
Incidence relation is preset according to master cylinder pressure signal, wheel deceleration signal and first, it is determined that vehicle to be diagnosed
Master cylinder pressure sensor whether there is pressure signal drifting fault, wherein, brake fault includes pressure signal drifting fault, master cylinder
Pressure sensor is used to detect master cylinder pressure signal.
The embodiments of the invention provide a kind of embodiment of vehicle brake fault is diagnosed, that is, diagnose master cylinder pressure sensor
With the presence or absence of the embodiment of pressure signal drifting fault.
In another optional embodiment of the embodiment of the present invention, as shown in Fig. 2 being subtracted according to master cylinder pressure signal, wheel
Rate signal and the first default incidence relation, it is determined that the master cylinder pressure sensor of vehicle to be diagnosed floats with the presence or absence of pressure signal
Failure is moved, detailed process includes：
Step S201, according to wheel deceleration signal, the nominal pressure value of master cylinder is calculated by the first default incidence relation.
Specifically, wheel speed sensors detect wheel speed signal, and wheel speed signal obtains carrying wheel after calculating and analysis
The wheel deceleration signal of deceleration information, substitutes into first by the deceleration value of the wheel carried in wheel deceleration signal and presets
Between the expression master cylinder pressure and wheel deceleration of incidence relation in the formula of magnitude relationship, the nominal pressure of master cylinder is calculated
Value.
Step S202, according to master cylinder pressure signal, determines the pressure sensor measured value of master cylinder.
Specifically, master cylinder pressure signal is the value that master cylinder pressure sensor is detected, thus is carried in master cylinder pressure signal
The pressure sensor actual measurement value information of master cylinder, is the pressure sensor measured value that can determine that master cylinder by master cylinder pressure signal.
Step S203, calculates the difference between nominal pressure value and pressure sensor measured value, obtains the first result.
It should be noted that the difference between nominal pressure value and pressure sensor measured value represents nominal pressure value here
The value differed between pressure sensor measured value, is that nominal pressure value subtracts the exhausted of acquired results after pressure sensor measured value
To value, thus the first result is a nonnegative number.
Step S204, judges whether the first result is more than the first predetermined threshold value.
Step S205, if it is judged that the first result is more than the first predetermined threshold value, it is determined that the master cylinder pressure of vehicle to be diagnosed
There is pressure signal drifting fault in force snesor, then terminate this and the process that brake fault is diagnosed is carried out to vehicle.
, whereas if judging that the first result is not more than the first predetermined threshold value, then terminate this and braking event is carried out to vehicle
Hinder the process diagnosed.
It should be noted that the embodiment of the present invention is to detect wheel speed signal accurately based on wheel speed sensors, thus first
As a result it is more than the first predetermined threshold value, then shows that the signal that the master cylinder pressure sensor of vehicle is detected is inaccurate, thus vehicle
There is pressure signal drifting fault in master cylinder pressure sensor.
In another optional embodiment of the embodiment of the present invention, include the situation of pedal travel signal in brake signal
Under, according to brake signal and wheel deceleration signal, it is determined that vehicle to be diagnosed whether there is brake fault, including：
Obtain the second default incidence relation between pedal travel and wheel deceleration in vehicle to be diagnosed；
Incidence relation is preset according to pedal travel signal, wheel deceleration signal and second, it is determined that vehicle to be diagnosed
Brake piping whether there is signals leakiness failure, wherein, brake fault includes signals leakiness failure.
The embodiments of the invention provide the embodiment for diagnosing another vehicle brake fault, that is, whether diagnose brake piping
There is the embodiment of signals leakiness failure.
In another optional embodiment of the embodiment of the present invention, as shown in figure 3, being subtracted according to pedal travel signal, wheel
Rate signal and the second default incidence relation, it is determined that the brake piping of vehicle to be diagnosed whether there is signals leakiness failure, tool
Body process includes：
Step S301, according to pedal travel signal, name wheel deceleration value is calculated by the second default incidence relation.
Specifically, pedal travel signal is the signal that PTS is detected, and will be carried in pedal travel signal
Pedal travel value substitute into the formula for representing magnitude relationship between pedal travel and wheel deceleration of the second default incidence relation
In, you can calculate name wheel deceleration value.
Step S302, according to wheel deceleration signal, determines wheel deceleration measured value.
Specifically, wheel speed sensors detect wheel speed signal, and wheel speed signal obtains carrying wheel after calculating and analysis
The wheel deceleration signal of deceleration information, thus according to wheel deceleration signal, you can it is determined that being detected with wheel speed sensors
The corresponding wheel deceleration measured value of wheel speed signal.
Step S303, calculates the difference between name wheel deceleration value and wheel deceleration measured value, obtains the second result.
It should be noted that the difference between name wheel deceleration value and wheel deceleration measured value represents nominal wheel here
The value differed between deceleration value and wheel deceleration measured value, is that name wheel deceleration value is subtracted after wheel deceleration measured value
The absolute value of acquired results, thus the second result is similarly a nonnegative number.
Step S304, judges whether the second result is more than the second predetermined threshold value.
Step S305, if it is judged that the second result is more than the second predetermined threshold value, it is determined that the brake pipe of vehicle to be diagnosed
There is signals leakiness failure in road, then terminate this and the process that brake fault is diagnosed is carried out to vehicle.
, whereas if judging that the second result is not more than the second predetermined threshold value, then terminate this and braking event is carried out to vehicle
Hinder the process diagnosed.
It should be noted that the embodiment of the present invention is the pedal travel signal standard detected based on PTS
Really, and, it is accurate that wheel speed sensors detect wheel speed signal, thus the second result is more than the second predetermined threshold value, then shows to pass through
There is signal leakage failure in the brake piping that pedal travel control wheel slows down.
In another optional embodiment of the embodiment of the present invention, include master cylinder pressure signal and pedal row in brake signal
, can be with the case of journey signal：
First carry out obtaining the first default incidence relation between master cylinder pressure and wheel deceleration in vehicle to be diagnosed；According to
The default incidence relation of master cylinder pressure signal, wheel deceleration signal and first, it is determined that the master cylinder pressure sensing of vehicle to be diagnosed
Device whether there is pressure signal drifting fault.
If pressure signal drifting fault is not present in master cylinder pressure sensor, then carries out obtaining pedal in vehicle to be diagnosed
The second default incidence relation between stroke and wheel deceleration；According to pedal travel signal, wheel deceleration signal and
Two default incidence relations, it is determined that the brake piping of vehicle to be diagnosed whether there is signals leakiness failure.
Specifically, according to the default incidence relation of master cylinder pressure signal, wheel deceleration signal and first, follow-up is determined
The master cylinder pressure sensor of disconnected vehicle whether there is pressure signal drifting fault, and detailed process includes step S201- steps S205
In the case of, judge that the first result is not more than after the first predetermined threshold value in step S204, perform：Obtain in vehicle to be diagnosed
The second default incidence relation between pedal travel and wheel deceleration；According to pedal travel signal, wheel deceleration signal with
And the second default incidence relation, it is determined that the brake piping of vehicle diagnose is with the presence or absence of signals leakiness failure.
Specifically, in the second default incidence relation in obtaining vehicle to be diagnosed between pedal travel and wheel deceleration；
According to the default incidence relation of pedal travel signal, wheel deceleration signal and second, it is determined that the brake piping of vehicle to be diagnosed
With the presence or absence of signals leakiness failure, in the case that detailed process includes step S301- steps S305, judge in step S204
First result is not more than after the first predetermined threshold value, then performs step S301.
On the other hand, if master cylinder pressure sensor has pressure signal drifting fault, following step is no longer performed：Obtain
Take the second default incidence relation between pedal travel and wheel deceleration in vehicle to be diagnosed；According to pedal travel signal, car
Deceleration signal and the second default incidence relation are taken turns, it is determined that the brake piping of vehicle to be diagnosed is with the presence or absence of signals leakiness event
Barrier.Corresponding treatment measures can be done then for pressure signal drifting fault.
In another optional embodiment of the embodiment of the present invention, as shown in figure 4, subtracting in the wheel for obtaining vehicle to be diagnosed
After rate signal and brake signal, the diagnostic method of vehicle brake fault also includes：
Step S103, according to wheel deceleration signal or brake signal, judges whether vehicle to be diagnosed is in on-position,
Also, judge whether electric stabilizing system control function is not triggered；
Judging that vehicle to be diagnosed is in the case that on-position and electric stabilizing system control function be not triggered,
Perform according to brake signal and wheel deceleration signal, it is determined that the step of vehicle to be diagnosed whether there is brake fault.
, whereas if judging that vehicle to be diagnosed is not at on-position or electric stabilizing system control function is touched
Hair, then terminate this and the process that brake fault is diagnosed carried out to vehicle.
It is any one in wheel deceleration signal, master cylinder pressure signal, pedal travel signal in the embodiment of the present invention
Signal is planted to determine whether vehicle to be diagnosed is in on-position.In addition, in view of after electric stabilizing system control function is triggered,
Electric stabilizing system has carried out active control regulation, and it is steady that the relation between wheel deceleration degree and brake applications receives electronics
Determine the intervention of system, the incidence relation between wheel deceleration degree and brake applications is no longer the default incidence relation of vehicle,
Thus the embodiment of the present invention, is judging that vehicle to be diagnosed is in on-position and electric stabilizing system control function is not triggered
In the case of, perform according to brake signal and wheel deceleration signal, it is determined that vehicle to be diagnosed whether there is the step of brake fault
Suddenly.
In another optional embodiment of the embodiment of the present invention, as shown in figure 4, according to brake signal and wheel deceleration
Signal is spent, after determining that vehicle to be diagnosed has a brake fault, the diagnostic method of vehicle brake fault also includes：
Step S105, performs following at least one operation：Alarm lamp operation is lighted, brake fault code operation, hair is stored
Send brake fault information to operate, then terminate.
The embodiment of the present invention, is braked according to brake signal and wheel deceleration signal, determining that vehicle to be diagnosed is present
After failure, user is allowed to learn brake fault, Huo Zhetong by lighting alarm lamp operation or sending the operation of brake fault information
Storage brake fault code operation is crossed so that user checks brake fault.
Embodiment two
A kind of diagnostic device of vehicle brake fault provided in an embodiment of the present invention, as shown in figure 5, including：
Acquisition module 100, wheel deceleration signal and brake signal for obtaining vehicle to be diagnosed, wherein, braking letter
Number at least include one below：Master cylinder pressure signal, pedal travel signal；
Determining module 300, for according to brake signal and wheel deceleration signal, it is determined that vehicle to be diagnosed is with the presence or absence of system
Dynamic failure.
Specifically, acquisition module 100 can include wheel deceleration signal acquiring unit, master cylinder pressure signal acquisition list
Member, pedal travel signal acquiring unit.Wherein,
Wheel deceleration signal acquiring unit and wheel speed sensors connection, the wheel speed gathered by receiving wheel speed sensors are believed
Number, wheel speed sensors measured value is calculated, then by analysis and is calculated, generation carries the wheel of wheel deceleration measured value
Deceleration signal；
Master cylinder pressure signal acquiring unit is connected with master cylinder pressure sensor, and what reception master cylinder pressure sensor was collected takes
Pressure sensor with master cylinder surveys the master cylinder pressure signal of value information；
Pedal travel signal acquiring unit is connected with PTS, and what reception PTS was collected takes
Pedal travel signal with pedal travel value.
In addition, determining module 300 determines vehicle to be diagnosed with the presence or absence of system according to brake signal and wheel deceleration signal
Dynamic failure, i.e., for carrying out fault detect.
In embodiments of the present invention, acquisition module 100 obtains the wheel deceleration signal and brake signal of vehicle to be diagnosed,
Wherein, wheel deceleration signal carries the degree information that the rotating speed of wheel reduces, and brake signal carries vehicle brake assemblies
Brake applications information, determining module 300 in view of in the brakes of each car the brake applications of brake component and wheel wheel speed
There are default incidence relation, thus brake signal and wheel deceleration signal by getting between reduction degree, it is possible to
Determine whether the incidence relation between brake signal and wheel deceleration signal meets default incidence relation, so that it is determined that waiting to diagnose
Vehicle whether there is brake fault, and the technology for alleviating the efficient diagnosis method for lacking vehicle brake fault in the prior art is asked
Topic.
In another optional embodiment of the embodiment of the present invention, determining module includes：
First acquisition unit, in the case of including master cylinder pressure signal in brake signal, is obtained in vehicle to be diagnosed
The first default incidence relation between master cylinder pressure and wheel deceleration；
First determining unit, for presetting incidence relation according to master cylinder pressure signal, wheel deceleration signal and first,
It is determined that the master cylinder pressure sensor of vehicle to be diagnosed whether there is pressure signal drifting fault, wherein, brake fault includes pressure
Signal drift failure, master cylinder pressure sensor is used to detect master cylinder pressure signal.
In another optional embodiment of the embodiment of the present invention, the first determining unit is used for：
According to wheel deceleration signal, the nominal pressure value of master cylinder is calculated by the first default incidence relation；
According to master cylinder pressure signal, the pressure sensor measured value of master cylinder is determined；
The difference between nominal pressure value and pressure sensor measured value is calculated, the first result is obtained；
Judge whether the first result is more than the first predetermined threshold value；
If it is judged that the first result is more than the first predetermined threshold value, it is determined that the master cylinder pressure sensor of vehicle to be diagnosed is deposited
In pressure signal drifting fault.
In another optional embodiment of the embodiment of the present invention, determining module 300 includes：
First acquisition unit, for obtaining the second default pass in vehicle to be diagnosed between pedal travel and wheel deceleration
Connection relation；
First determining unit, for presetting incidence relation according to pedal travel signal, wheel deceleration signal and second,
It is determined that the brake piping of vehicle to be diagnosed whether there is signals leakiness failure, wherein, brake fault includes signals leakiness failure.
In another optional embodiment of the embodiment of the present invention, the second determining unit is used for：
According to pedal travel signal, name wheel deceleration value is calculated by the second default incidence relation；
According to wheel deceleration signal, wheel deceleration measured value is determined；
The difference between name wheel deceleration value and wheel deceleration measured value is calculated, the second result is obtained；
Judge whether the second result is more than the second predetermined threshold value；
If it is judged that the second result is more than the second predetermined threshold value, it is determined that the brake piping of vehicle to be diagnosed has signal
Leakage failure.
In another optional embodiment of the embodiment of the present invention, as shown in fig. 6, the diagnostic device of vehicle brake fault is also
Including：
Judge module 200, for after the wheel deceleration signal and brake signal of vehicle to be diagnosed is obtained, according to car
Deceleration signal or brake signal are taken turns, judges that whether vehicle to be diagnosed is in on-position, also, judge electric stabilizing system control
Whether function processed is not triggered；
Wherein, the feelings that vehicle to be diagnosed is not triggered in on-position and electric stabilizing system control function are being judged
Under condition, determining module 300 is set to perform according to brake signal and wheel deceleration signal, it is determined that vehicle to be diagnosed is with the presence or absence of braking
The step of failure.
Specifically, judge module 200 confirms to be by carrying out signal resolution to brake signal and wheel deceleration signal
It is no to be in on-position.
In another optional embodiment of the embodiment of the present invention, as shown in fig. 6, the diagnostic device of vehicle brake fault is also
Including：
Diagnostic result processing module 400, in determining module 300 according to brake signal and wheel deceleration signal, really
Make after vehicle to be diagnosed has a brake fault, perform following at least one operation：Light alarm lamp operation, storage braking event
Hinder code operation, send the operation of brake fault information, i.e., failure detection result is handled.
The diagnostic method and the computer program product of device for the vehicle brake fault that the embodiment of the present invention is provided, including
The computer-readable recording medium of program code is stored, the instruction that described program code includes can be used for performing previous methods reality
The method described in example is applied, implements and can be found in embodiment of the method, will not be repeated here.
It is apparent to those skilled in the art that, for convenience and simplicity of description, the system of foregoing description
With the specific work process of device, the corresponding process in preceding method embodiment is may be referred to, be will not be repeated here.
If the function is realized using in the form of SFU software functional unit and is used as independent production marketing or in use, can be with
It is stored in a computer read/write memory medium.Understood based on such, technical scheme is substantially in other words
The part contributed to prior art or the part of the technical scheme can be embodied in the form of software product, the meter
Calculation machine software product is stored in a storage medium, including some instructions are to cause a computer equipment (can be individual
People's computer, server, or network equipment etc.) perform all or part of step of each of the invention embodiment methods described.
And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only storage (ROM, Read-Only Memory), arbitrary access are deposited
Reservoir (RAM, Random Access Memory), magnetic disc or CD etc. are various can be with the medium of store program codes.
In the description of the invention, it is necessary to explanation, term " " center ", " on ", " under ", "left", "right", " vertical ",
The orientation or position relationship of the instruction such as " level ", " interior ", " outer " be based on orientation shown in the drawings or position relationship, merely to
Be easy to the description present invention and simplify description, rather than indicate or imply signified device or element must have specific orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.
In addition, term " first ", " second ", " the 3rd " are only used for describing purpose, and it is not intended that indicating or implying phase
To importance.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected to by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this
Concrete meaning in invention.
Finally it should be noted that：Embodiment described above, is only the embodiment of the present invention, to illustrate the present invention
Technical scheme, rather than its limitations, protection scope of the present invention is not limited thereto, although with reference to the foregoing embodiments to this hair
It is bright to be described in detail, it will be understood by those within the art that：Any one skilled in the art
The invention discloses technical scope in, it can still modify to the technical scheme described in previous embodiment or can be light
Change is readily conceivable that, or equivalent substitution is carried out to which part technical characteristic；And these modifications, change or replacement, do not make
The essence of appropriate technical solution departs from the spirit and scope of technical scheme of the embodiment of the present invention, should all cover the protection in the present invention
Within the scope of.Therefore, protection scope of the present invention described should be defined by scope of the claims.
Claims (10)
1. a kind of diagnostic method of vehicle brake fault, it is characterised in that including：
Obtain the wheel deceleration signal and brake signal of vehicle to be diagnosed, wherein, the brake signal at least include it is following it
One：Master cylinder pressure signal, pedal travel signal；
According to the brake signal and the wheel deceleration signal, it is determined that the vehicle to be diagnosed whether there is brake fault.
2. according to the method described in claim 1, it is characterised in that include the master cylinder pressure signal in the brake signal
In the case of, according to the brake signal and the wheel deceleration signal, it is determined that the vehicle to be diagnosed is with the presence or absence of braking event
Barrier, including：
Obtain the first default incidence relation between master cylinder pressure and wheel deceleration in the vehicle to be diagnosed；
According to the master cylinder pressure signal, the wheel deceleration signal and the first default incidence relation, it is determined that described
The master cylinder pressure sensor of vehicle to be diagnosed whether there is pressure signal drifting fault, wherein, the brake fault includes described
Pressure signal drifting fault, the master cylinder pressure sensor is used to detect the master cylinder pressure signal.
3. method according to claim 2, it is characterised in that according to the master cylinder pressure signal, the wheel deceleration
Signal and the first default incidence relation, it is determined that the master cylinder pressure sensor of the vehicle to be diagnosed is believed with the presence or absence of pressure
Number drifting fault, including：
According to the wheel deceleration signal, the nominal pressure value of master cylinder is calculated by the described first default incidence relation；
According to the master cylinder pressure signal, the pressure sensor measured value of master cylinder is determined；
The difference between the nominal pressure value and the pressure sensor measured value is calculated, the first result is obtained；
Judge whether first result is more than the first predetermined threshold value；
If it is judged that first result is more than first predetermined threshold value, it is determined that the master cylinder pressure of the vehicle to be diagnosed
There is the pressure signal drifting fault in sensor.
4. according to the method described in claim 1, it is characterised in that include the pedal travel signal in the brake signal
In the case of, according to the brake signal and the wheel deceleration signal, it is determined that the vehicle to be diagnosed is with the presence or absence of braking event
Barrier, including：
Obtain the second default incidence relation between pedal travel and wheel deceleration in the vehicle to be diagnosed；
According to the pedal travel signal, the wheel deceleration signal and the second default incidence relation, it is determined that described
The brake piping of vehicle to be diagnosed whether there is signals leakiness failure, wherein, the brake fault includes signals leakiness event
Barrier.
5. method according to claim 4, it is characterised in that according to the pedal travel signal, the wheel deceleration
Signal and the second default incidence relation, it is determined that the brake piping of the vehicle to be diagnosed is with the presence or absence of signals leakiness event
Barrier, including：
According to the pedal travel signal, name wheel deceleration value is calculated by the described second default incidence relation；
According to the wheel deceleration signal, wheel deceleration measured value is determined；
The difference between the name wheel deceleration value and the wheel deceleration measured value is calculated, the second result is obtained；
Judge whether second result is more than the second predetermined threshold value；
If it is judged that second result is more than second predetermined threshold value, it is determined that the brake piping of the vehicle to be diagnosed
There is the signals leakiness failure.
6. according to the method described in claim 1, it is characterised in that obtaining the wheel deceleration signal and system of vehicle to be diagnosed
After dynamic signal, methods described also includes：
According to the wheel deceleration signal or the brake signal, judge whether the vehicle to be diagnosed is in on-position,
Also, judge whether electric stabilizing system control function is not triggered；
In the case where vehicle to be diagnosed described in judging is in on-position and does not trigger electric stabilizing system control function, hold
Row is described according to the brake signal and the wheel deceleration signal, it is determined that the vehicle to be diagnosed whether there is brake fault
The step of.
7. according to the method described in claim 1, it is characterised in that according to the brake signal and wheel deceleration letter
Number, after determining that the vehicle to be diagnosed has a brake fault, methods described also includes：
Perform following at least one operation：Alarm lamp operation is lighted, brake fault code operation is stored, brake fault information is sent
Operation.
8. a kind of diagnostic device of vehicle brake fault, it is characterised in that including：
Acquisition module, wheel deceleration signal and brake signal for obtaining vehicle to be diagnosed, wherein, the brake signal is extremely
Include one below less：Master cylinder pressure signal, pedal travel signal；
Determining module, for according to the brake signal and the wheel deceleration signal, it is determined that the vehicle to be diagnosed whether
There is brake fault.
9. device according to claim 8, it is characterised in that the determining module includes：
First acquisition unit, in the case of including the master cylinder pressure signal in the brake signal, obtains the follow-up
The first default incidence relation in disconnected vehicle between master cylinder pressure and wheel deceleration；
First determining unit, for being preset according to the master cylinder pressure signal, the wheel deceleration signal and described first
Incidence relation, it is determined that the master cylinder pressure sensor of the vehicle to be diagnosed whether there is pressure signal drifting fault, wherein, it is described
Brake fault includes the pressure signal drifting fault, and the master cylinder pressure sensor is used to detect the master cylinder pressure signal.
10. device according to claim 9, it is characterised in that first determining unit is used for：
According to the wheel deceleration signal, the nominal pressure value of master cylinder is calculated by the described first default incidence relation；
According to the master cylinder pressure signal, the pressure sensor measured value of master cylinder is determined；
The difference between the nominal pressure value and the pressure sensor measured value is calculated, the first result is obtained；
Judge whether first result is more than the first predetermined threshold value；
If it is judged that first result is more than first predetermined threshold value, it is determined that the master cylinder pressure of the vehicle to be diagnosed
There is the pressure signal drifting fault in sensor.
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| CN201710535218.0A CN107298089B (en) | 2017-07-03 | 2017-07-03 | The diagnostic method and device of vehicle braking failure |
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|---|---|---|---|
| CN201710535218.0A CN107298089B (en) | 2017-07-03 | 2017-07-03 | The diagnostic method and device of vehicle braking failure |
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| CN109398334A (en) * | 2018-12-29 | 2019-03-01 | 芜湖伯特利汽车安全***股份有限公司 | A kind of control method and system promoting motor vehicle service brake safety based on parking braking |
| CN109895757A (en) * | 2017-12-08 | 2019-06-18 | 通用汽车环球科技运作有限责任公司 | Method and apparatus for monitoring vehicle brake |
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Inventor after: Zhao Xuan Inventor after: Li Chenfeng Inventor after: Zhang Zhe Inventor after: Yu Wei Inventor before: Zhao Xuan Inventor before: Li Liang Inventor before: Li Chenfeng Inventor before: Zhang Zhe Inventor before: Yu Wei |