CN209400629U - A kind of motor vehicle braking system fault simulation detection analysis instrument - Google Patents
A kind of motor vehicle braking system fault simulation detection analysis instrument Download PDFInfo
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- CN209400629U CN209400629U CN201920042841.7U CN201920042841U CN209400629U CN 209400629 U CN209400629 U CN 209400629U CN 201920042841 U CN201920042841 U CN 201920042841U CN 209400629 U CN209400629 U CN 209400629U
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Abstract
The utility model discloses a kind of motor vehicle braking system fault simulation detection analysis instruments.The utility model includes signal imitation generator and fault simulator, has ABS anti-lock test pattern, fault simulation detection pattern, wheel speed sensors detection pattern, the full vehicle control unit detection pattern of ABS control unit detection pattern；The utility model simulates the output signal of former vehicle sensor by signal imitation generator, it selects to be transmitted to ABS control unit by the output signal of former vehicle sensor or by the output signal of analog sensor by fault simulator, and fault point is arranged by fault simulator, simulate true phenomenon of the failure, phenomenon of the failure has intuitive, can be improved the level of skill of maintenance personal；Not needing road test can be completed the test of ABS anti-lock, saves the time and reduces test run risk；It is capable of the data information of each sensor of rapid survey ABS system, and the relevant information of one or more control units in full vehicle control unit can be read.
Description
Technical field
The utility model relates to vehicle testing techniques, and in particular to a kind of motor vehicle braking system fault simulation detection and analysis
Instrument.
Background technique
Anti-lock braking system in automobiles ABS is a kind of automobile electronic system, it include an electronics ABS control unit,
Several wheel speed inductors and one include the valve assembly of solenoid valve.The pulse that electronic control unit is transmitted by wheel speed inductor
It changes to grasp the operation conditions of wheel.When some wheel is possible to generate locking state, electronic control unit will be to
Electricity grows valve and issues instruction, makes it through high-speed switch to reach control brake, adjusts the purpose of wheel speed.
If ABS breaks down, it is elongated to will lead to braking distance in emergency braking, and it is hidden that unpredictable safety occurs
Suffer from.
1. when whether traditional detection ABS is working properly, it is necessary first to be read out error code and data using detector
Then stream carries out road test when fault-free code again, needs to improve the speed of vehicle in road test, then promptly step on system
Dynamic pedal, if brake pedal has the feeling of shell foot, it was demonstrated that ABS is working properly.In traditional detection ABS, when expending a large amount of
Between and energy, and promptly step on braking during road test and will cause unexpected generation.
2. it needs ABS control unit plug to pull in the circuit of tradition maintenance ABS, is measured at plug,
General vehicle ABS control unit installation site is excessively narrow, causes measurement inconvenient.
3. in ABS, wheel speed sensors often break down, in traditional detection wheel speed sensors, first using inspection
Instrument read failure code is surveyed, the data flow of wheel speed sensors is then read, if detector is shown when being wheel speed sensor fault, that
This failure is likely to be wheel speed sensor fault, it is also possible to be that harness between wheel speed sensors and ABS control unit goes out
Existing failure.A new wheel speed sensors are so first replaced under normal circumstances, and then test run illustrates wheel speed if failure vanishes
The failure of sensor, if there are still be the failure of harness with regard to explanation, during this troubleshooting, when can expend a large amount of to failure
Between and energy.
4. in ABS, when ABS control unit breaks down, detector read failure code is used first, if detector is shown
When being ABS control unit damage, then new ABS control unit is needed replacing under normal circumstances, it, can in order to reduce maintenance cost
To repair for ABS control unit, need to carry out using the conventional detections tool such as multimeter in traditional maintenance process
Maintenance, maintenance is long in time limit, can not accurately judge the position of fault point, secondly either tears open in the ABS control unit more renewed
When vehicle part, since ABS control unit sheet is as electronic component, needs to detect it, test function after entrucking under normal circumstances
Can whether normal, entrucking test will lead to unnecessary trouble, expend energy and time.
Summary of the invention
For the above problems of the prior art, the utility model proposes a kind of motor vehicle braking system fault simulations
Detection analysis instrument, braking test, providing convenience property of trouble hunting to anti-lock braking system in automobiles.
The connecting wire of each original vehicle sensor is corresponding with the connecting wire of ABS control unit；Each original vehicle sensor
Connecting wire be arranged on connecting wire plug, the connecting wire of ABS control unit is arranged on control unit plug, connection
Line trap is connected with control unit plug, so that each former vehicle sensor to be connected to the ABS control unit of former vehicle.
Four wheel the near front wheels, off-front wheel, left rear wheel and the off hind wheel of former vehicle are respectively arranged with first to fourth wheel speed biography
Sensor, brake pedal connect master cylinder by lever, and master cylinder connects abs pump by brake oil pipe, and abs pump is separately connected
To first to fourth ABS into draining solenoid valve, first to fourth ABS passes through brake oil pipe into draining solenoid valve respectively and is connected to four
Brake cylinder on a wheel is respectively arranged with the first and second systems on the brake cylinder of two front-wheel the near front wheels and off-front wheel
Brake pedal signal is arranged after brake pedal and switchs to detect brake pressure for dynamic pressure force snesor；First to fourth wheel speed
Sensor, the first and second brake-pressure sensors and brake pedal signal switch, are referred to as former vehicle sensor；ABS control is single
Abs pump, ABS solenoid relay valve and first to fourth ABS are connected in member into draining solenoid valve, ABS solenoid relay valve
It is connected to abs pump, abs pump is respectively connected to first to fourth ABS into draining solenoid valve；Abs pump, ABS solenoid relay valve with
And first to fourth ABS into draining solenoid valve be referred to as former vehicle actuator；Wheel speed signal is transmitted to ABS control by wheel speed sensors
Unit if the wheel speed of wheel is more than threshold value speed per hour, and tramples brake pedal, and brake-pressure sensor transmits brake pressure
Signal is to ABS control unit, and when stepping on brake pedal suddenly, brake pedal signal switch transmission brake pedal signal to ABS is controlled
Unit, ABS control unit issue emergency brake signal after receiving brake pedal signal, and ABS control unit controls ABS solenoid valve
Relay is attracted, and abs pump work, first to fourth ABS of control controls the brake cylinder work on four wheels into draining solenoid valve
Make to realize point brake effect.
The motor vehicle braking system fault simulation detection analysis instrument of the utility model includes: signal imitation generator and failure mould
Quasi- device；Wherein, signal imitation generator include first to fourth wheel speed signal generator, first to fourth wheel speed adjustment button,
First to fourth wheel speed signal exports switch, the first and second brake pressure signal generators, the first and second brake pressure tune
Whole button and output switch, brake pedal signal output switch, full vehicle control unit diagnostic system and onboard diagnostic system OBD are examined
Fracture, first to fourth wheel speed adjustment button are respectively connected to corresponding first to fourth wheel speed signal generator, and first to the
Four wheel speed signal output switch are respectively connected to first to fourth wheel speed signal generator, and the adjustment of the first and second brake pressures is pressed
Button and output, which switch, is respectively connected to the first and second brake pressure signal generators, first to fourth wheel speed signal generator,
First and second brake pressure signal generators and brake pedal signal output switch are referred to as analog sensor, each simulation
Sensor, OBD diagnostics port and full vehicle control unit diagnostic system are arranged on generator plug by conducting wire respectively；Fault simulation
Device includes generator input terminal, former vehicle signal input part, signal output end, fault setting element, one group of bridge position and one group of survey
Point is measured, one group of bridge position includes multipair bridge position, and one group of measurement point includes multipair measurement point, and the both ends of a pair of of bridge position connect respectively
It connects in the both ends of a pair of of measurement point, every a pair of bridge position and measurement point and the connecting wire of each former vehicle sensor, connection
Corresponding with supply lines, former vehicle signal input part is connected to the first end of one group of bridge position and measurement point, one group of bridge position and survey
The second end of amount point is connected to signal output end, and generator input terminal is connected to signal output end；It is pulled out from connecting wire plug
Fall control unit plug, ABS control unit disconnects and former vehicle sensor, communication and the connection of power supply；Generator plug is connected to
The generator input terminal of fault simulator, connecting wire plug are connected to the former vehicle signal input part of fault simulator, failure mould
The signal output end of quasi- device is connected to control unit plug, thus the corresponding bridge position of former vehicle sensor series and measurement point and phase
The analog sensor answered is in parallel, and former vehicle connection is connected in parallel to signal mode by the corresponding bridge position of series connection and measurement point respectively
The full vehicle control unit diagnostic system and OBD diagnostics port of quasi- generator, supply lines pass through corresponding bridge position and the measurement point of connecting
It is connected to signal imitation generator, signal imitation generator is connected to ABS control unit, and the connecting wire of former vehicle sensor is led to
It interrogates line and supply lines and ABS control unit is connected to by bridge position and measurement point.
The motor vehicle braking system fault simulation detection analysis instrument of the utility model has ABS anti-lock test pattern, failure
Analog detection mode, wheel speed sensors detection pattern, ABS control unit detection pattern and full vehicle control unit detection pattern.
Under ABS anti-lock test pattern, bridge position corresponding with connection and supply lines and measurement point be respectively provided with across
Plug；It selects one or more of former vehicle sensor to disconnect with ABS control unit, the disconnection of corresponding bridge position is not set
Set bridging plug, be respectively provided with bridging plug on the corresponding bridge position of other original vehicle sensors, then the former vehicle sensor selected with
ABS control unit disconnects, and the signal output switch of corresponding analog sensor is opened simultaneously, so that signal imitation generator is defeated
One of corresponding wheel speed signal, brake pressure signal and brake pedal signal or a variety of to ABS control unit out；Pass through wheel
The whole button of velocity modulation controls the corresponding wheel speed signal of corresponding wheel speed signal generator generation and is transmitted to ABS control unit, passes through system
Dynamic pressure adjusts button and output switch adjustment brake pressure signal generator issues brake pressure signal to ABS control unit,
Brake pedal signal exports switch control and exports brake pedal signal, if ABS control unit receives wheel speed signal more than threshold
When being worth speed per hour, and brake pressure signal is received, issues emergency braking after ABS control unit receives brake pedal signal
Signal ABS control unit controls ABS solenoid relay valve and is attracted, and abs pump work controls first to fourth ABS into drain electromagnetism
Point brake effect is realized in brake cylinder work on four wheels of valve job control.
Under fault simulation detection pattern, bridge position corresponding with connection and supply lines and measurement point are respectively provided with bridging
Plug；Signal imitation generator first to fourth wheel speed signal output switch, the first and second brake pressures adjustment button and
Output switch, brake pedal signal output switch are turned off, and pass through the connecting fault setting member on bridge position, simulation setting phase
Answer the failure of connecting wire, connection or supply lines；It is measured in measurement point by multimeter, or external by connecting
It diagnoses computer and carries out fault detection in OBD diagnostics port.
Under wheel speed sensors detection pattern, bridge position corresponding with connection and supply lines and measurement point be respectively provided with across
Plug；Bridge position corresponding with former first to fourth wheel speed sensors of vehicle plugs bridging plug in fault simulator, thus former
First to fourth wheel speed sensors of vehicle are connected to ABS control unit, and first to fourth wheel of shutdown signal simulative generator
Fast signal output switch, first to fourth wheel speed signal generator of signal imitation generator disconnect the letter with ABS control unit
Number output；The error code or number of ABS control unit are read by the full vehicle control unit diagnostic system in signal imitation generator
According to stream relevant information, the failure of which wheel speed sensors is determined；It is in fault simulator, faulty wheel speed sensors are corresponding
Bridge position disconnect, and corresponding wheel speed signal output switch in open signal simulative generator, thus by corresponding wheel
The wheel speed signal of fast signal generator is connected to ABS control unit；In signal imitation generator, adjusted by corresponding wheel speed
Button controls wheel speed signal generator and issues corresponding wheel speed signal, checks tested wheel in conjunction with full vehicle control unit diagnostic system
Wheel speed signal data flow, check the failure of former wheel speed sensor.
Under ABS control unit detection pattern, the company with the connecting wire of former vehicle sensor, connection and supply lines is disconnected
It connects, i.e., is not provided with bridging plug on bridge position, external power supply controls signal imitation generator and ABS in fault simulator
Unit power supply；The wheel speed signal of wheel speed signal generator is set in signal imitation generator, and wheel speed signal is set in fixed value；
The pressure value of first and second brake pedal signal generators, brake pedal signal generator are set in signal imitation generator
Design of pressure in fixed value；It is single that ABS control is read in full vehicle control unit diagnostic system in signal imitation generator
Metamessage；By the information in the full vehicle control unit diagnostic system in signal imitation generator, judge that ABS control unit works
It is whether abnormal.
Under full vehicle control unit detection pattern, since the full vehicle control unit of vehicle is connected in parallel by connection
, full vehicle control unit diagnostic system in signal simulator reads the error code of each control unit of full vehicle, data flow
Related data information.
Full vehicle control unit includes control unit of engine, automatic gear-box control unit, ABS control unit, instrument control
Unit and air bag control unit processed etc..Under full vehicle control unit detection pattern, not when vehicle, which has, latches function automatically
Carefully car key is placed in vehicle, causes car door that can not open, common practices is to change lock master worker or breaking windows glass at this time
Glass takes out car key, and this operation is expensive time-consuming；In the present invention, by motor vehicle braking system fault simulation and detection
Analyzer allows metal plate master worker that engine compartment cover is opened, and fault simulator, signal imitation generator are connect with ABS control unit
Afterwards, entered in air bag control unit by full vehicle control unit diagnostic system, execute impact simulation function, at this time car door lock
It can automatically open, take out interior key.
Signal imitation generator further includes shell and circuit board, wherein first to fourth wheel speed signal generator, first to
The whole button of fourth round velocity modulation, first to fourth wheel speed signal output switch, the first and second brake pressure signal generators, first
Button is adjusted with the second brake pressure and output switch, brake pedal signal output, full vehicle control unit diagnostic system and OBD are examined
Fracture switch is respectively provided on circuit boards, and circuit board is arranged in shell.Full vehicle control unit diagnostic system includes that diagnostic equipment is aobvious
Display screen and diagnostic equipment operation button, diagnostic equipment operation button are connected to diagnostic equipment display screen, and connection is connected to diagnostic equipment and shows
Screen.
Fault setting element includes bridging plug, patchcord, swept resistance, one or more fixed value resistances, anode short circuit
End and the cathode short-circuit end supply lines with former vehicle signal input part respectively；Wherein, bridging plug is extracted from cross-line point, accordingly
Sensor and ABS control unit disconnect；Cross-line point connects swept resistance or insertion fixed resistance, i.e. fault setting conducting wire series electrical
Resistance, is arranged in the connecting wire of corresponding sensor that there are resistance；Cross-line point is connected to cathode short-circuit end, and corresponding connection is led
Line, communication line and supply lines are set as cathode short circuit；Bridge position is connected with each other by patchcord, multi-thread be shorted with each other is set.
The first end of bridge position corresponding with supply lines is separately connected positive short-circuit end and cathode short-circuit end.By positive short-circuit end and
Cathode short-circuit end external power supply is that signal imitation generator and fault simulator are powered.
Fault simulator further includes shell, and generator input terminal, former vehicle signal input part and signal output end are respectively set
On the shell, fault setting element, one group of bridge position and one group of measurement point are arranged inside the shell.
The advantages of the utility model:
The utility model uses signal imitation generator and fault simulator, simulates former vehicle by signal imitation generator and passes
The output signal of sensor, by fault simulator selection by the output signal of former vehicle sensor or by the output of analog sensor
Signal is transmitted to ABS control unit, and fault point is arranged by fault simulator, simulates true phenomenon of the failure, failure is existing
As can be improved the level of skill of maintenance personal with intuitive；Under ABS anti-lock test pattern, road test is not needed
The test of ABS anti-lock is completed, the time is saved and reduces test run risk；Combination failure simulator and full vehicle control unit diagnostic system
It is capable of the data information of each sensor of rapid survey ABS system, and one or more in full vehicle control unit can be read
The relevant information of a control unit；The present invention provides convenience to the braking test and trouble hunting of anti-lock braking system in automobiles
Property.
Detailed description of the invention
Fig. 1 is the structural block diagram of the motor vehicle braking system fault simulation detection analysis instrument of the utility model.
Specific embodiment
With reference to the accompanying drawing, by specific embodiment, the utility model is further described.
As shown in Figure 1, the motor vehicle braking system fault simulation detection analysis instrument of the present embodiment includes: signal imitation generator
And fault simulator；Wherein, signal imitation generator includes first to fourth wheel speed signal generator, first to fourth wheel velocity modulation
Whole button, first to fourth wheel speed signal output switch, the first and second brake pressure signal generators, the first and second brakings
Pressure adjusts button and output switch, brake pedal signal output switch, full vehicle control unit diagnostic system and onboard diagnostics system
System OBD diagnostics port, first to fourth wheel speed adjustment button are respectively connected to corresponding first to fourth wheel speed signal generator, the
One is respectively connected to first to fourth wheel speed signal generator, the first and second brake pressures to fourth round speed signal output switch
Adjustment button and output switch are respectively connected to the first and second brake pressure signal generators, first to fourth wheel speed signal hair
Raw device, the first and second brake pressure signal generators and brake pedal signal output switch are referred to as analog sensor, each
A analog sensor, OBD diagnostics port and full vehicle control unit diagnostic system are arranged on generator plug by conducting wire respectively；Therefore
Barrier simulator include generator input terminal, former vehicle signal input part, signal output end, fault setting element, one group of bridge position and
One group of measurement point, one group of bridge position include multipair bridge position, and one group of measurement point includes multipair measurement point, the both ends of a pair of of bridge position
It is connected to the both ends of a pair of of measurement point, the connecting wire of every a pair of bridge position and measurement point and each former vehicle sensor,
Connection and supply lines are corresponding, and former vehicle signal input part is connected to the first end of one group of bridge position and measurement point, one group of bridging
The second end of point and measurement point is connected to signal output end, and generator input terminal is connected to signal output end；It is inserted from connecting wire
Control unit plug is pulled out on head, ABS control unit disconnects and former vehicle sensor, communication and the connection of power supply；Generator plug
It is connected to the generator input terminal of fault simulator, connecting wire plug is connected to the former vehicle signal input part of fault simulator,
The signal output end of fault simulator is connected to control unit plug, thus the corresponding bridge position of former vehicle sensor series and measurement
Point is in parallel with corresponding analog sensor, and former vehicle connection is connected in parallel to respectively by the corresponding bridge position of series connection and measurement point
The full vehicle control unit diagnostic system and OBD diagnostics port of signal imitation generator, supply lines by connect corresponding bridge position and
Measurement point is connected to signal imitation generator, and supply lines is connected in parallel to the hair of first to fourth wheel speed signal in signal imitation generator
Raw device, the first and second brake pressure signal generators, full vehicle control unit diagnostic system and onboard diagnostic system OBD diagnosis
Mouthful, for above each structure power supply, signal imitation generator is connected to ABS control unit, and the connecting wire of former vehicle sensor is led to
It interrogates line and supply lines and ABS control unit is connected to by bridge position and measurement point.Supply lines includes 30 normalizing supply lines, 15 igniting
Switch supply lines and 31 negative lines, wherein the bridging in fault simulator corresponding with 30 normalizing supply lines and 31 negative lines
The first end of point is respectively connected to positive short-circuit end and cathode short-circuit end, passes through positive short-circuit end and the external electricity of cathode short-circuit end
Source is that signal imitation generator and fault simulator are powered.
The control method of the motor vehicle braking system fault simulation detection analysis instrument of the present embodiment has the test of ABS anti-lock
Mode, fault simulation detection pattern, wheel speed sensors detection pattern, ABS control unit detection pattern and the inspection of full vehicle control unit
Survey mode:
ABS anti-lock test pattern, comprising the following steps:
1) tested vehicle is lifted；
2) ignition switch of tested vehicle is closed；
3) the control unit plug of tested vehicle is pulled out from connecting wire plug, ABS control unit is disconnected to be passed with former vehicle
The connection of sensor；
4) generator plug is connected to the generator input terminal of fault simulator, connecting wire plug is connected to failure mould
The former vehicle signal input part of quasi- device, the signal output end of fault simulator are connected to control unit plug, thus former vehicle sensor
Connect corresponding bridge position and measurement point it is in parallel with analog sensor, and former vehicle connection and supply lines are respectively connected to signal
The full vehicle control unit diagnostic system and OBD diagnostics port of simulative generator, signal imitation generator are connected to ABS control unit,
Connecting wire, connection and the supply lines of former vehicle sensor are connected to ABS control unit by bridge position and measurement point；
5) bridge position corresponding with connection and supply lines and measurement point are respectively provided with bridging plug；Pass through fault simulator
In corresponding with first to fourth wheel speed sensors bridge position disconnect, thus disconnect first to fourth wheel speed sensors of former vehicle with
The connection of ABS control unit, and first to fourth wheel speed signal of open signal simulative generator exports switch, thus by the
One is connected to ABS control unit to the wheel speed signal of fourth round speed signal generator；
6) ignition switch of tested vehicle is opened；
7) ABS control unit for checking tested vehicle by the full vehicle control unit diagnostic system of signal imitation generator is
No there are error code, if there is error code, remove error code to ABS control unit；
8) according to the traffic flow information in full vehicle control unit diagnostic system, button point is adjusted by first to fourth wheel speed
The wheel speed signal for not adjusting corresponding wheel speed signal generator is more than threshold value wheel speed, and threshold value wheel speed is 30km/h；
9) start tested vehicle, wheel speed signal is transmitted to ABS by tested vehicle vehicle wheel rotation, signal imitation generator at this time
Control unit；
10) anxious to step on brake pedal, until wheel stops operating, brake pedal has the phenomenon that obvious shell foot at this time, show by
The ABS control unit of measuring car is working properly, if not having the phenomenon that shell foot after brake pedal, shows the ABS of tested vehicle
Control unit operation irregularity；
11) after testing, the connecting wire of removing vehicle braking system faults analog detection analyzer, grafting original vehicle is inserted
Head and control unit plug；
Fault simulation detection pattern, comprising the following steps:
1) the control unit error code of vehicle is read using the full vehicle control unit diagnostic system of signal imitation generator, such as
It is faulty, reparation removing is carried out, guarantees that vehicle does not have failure；
2) vehicle stall breaks storage battery negative polar curve；
3) control unit plug is pulled out from connecting wire plug, by each sensor of the control unit of former vehicle and former vehicle
It disconnects；
4) one end of fault simulator being connected on control unit plug, the other end is connected on connecting wire plug,
And check whether each plug is connected firmly, thus the series fault between each sensor of former vehicle and the control unit of former vehicle
Simulator；Bridge position corresponding with connection and supply lines and measurement point are respectively provided with bridging plug；
5) start vehicle；
6) control unit error code is read using the full vehicle control unit diagnostic system of signal imitation generator and removed；
7) engine misses are set on the fault setting conducting wire of fault simulator according to training contents referring to former vehicle circuit diagram
Set fault point；
Wheel speed sensors detection pattern, comprising the following steps:
1) it reaches on maintenance station, closes the ignition switch of tested vehicle；
2) the control unit plug of tested vehicle is pulled out from connecting wire plug, ABS control unit is disconnected to be passed with former vehicle
The connection of sensor；
3) generator plug is connected to the generator input terminal of fault simulator, connecting wire plug is connected to failure mould
The former vehicle signal input part of quasi- device, the signal output end of fault simulator are connected to control unit plug, thus former vehicle sensor
Connect corresponding bridge position and measurement point it is in parallel with analog sensor, and former vehicle connection and supply lines are respectively connected to signal
The full vehicle control unit diagnostic system and OBD diagnostics port of simulative generator, signal imitation generator are connected to ABS control unit,
Connecting wire, connection and the supply lines of former vehicle sensor are connected to ABS control unit by bridge position and measurement point；
4) bridge position corresponding with connection and supply lines and measurement point are respectively provided with bridging plug；Pass through fault simulator
In corresponding bridge position plug bridging plug, so that first to fourth wheel speed sensors of former vehicle are connected to ABS control unit,
And first to fourth wheel speed signal of shutdown signal simulative generator exports switch, by the first of signal imitation generator to the
Four wheel speed signal generators are disconnected to be exported with the signal of ABS control unit；
5) ignition switch of tested vehicle is opened；
6) by the full vehicle control unit diagnostic system in signal imitation generator read ABS control unit error code and
The relevant information of data flow determines the failure of which wheel speed sensors；
7) in fault simulator, the corresponding switch element of faulty wheel speed sensors is disconnected, and open signal mould
Corresponding wheel speed signal output switch in quasi- generator, so that the wheel speed signal of corresponding wheel speed signal generator be connected
To ABS control unit；
8) in signal imitation generator, button is adjusted by corresponding wheel speed and controls the sending of wheel speed signal generator accordingly
Wheel speed signal, check the wheel speed signal data flow of tested wheel in conjunction with full vehicle control unit diagnostic system, such as controlled in full vehicle
The wheel speed that wheel speed signal in unit diagnosis system is exported with wheel speed signal generator changes and changes, then shows tested vehicle
Wheel speed sensors it is faulty, need to change new；Wheel speed signal such as in full vehicle control unit diagnostic system is believed with wheel speed
The wheel speed variation of number generator output and it is constant, then show leading between the wheel speed sensors of tested vehicle and ABS control unit
Line breaks down, and needs repairing；
9) after fault point is found, tested vehicle is repaired；
10) after repairing, teardown signal simulative generator and fault simulator connect former vehicle plug；
ABS control unit detection pattern, comprising the following steps:
1) generator plug is connected to the generator input terminal of fault simulator, the signal output end of fault simulator connects
It is connected to control unit plug, so that signal imitation generator is connected to ABS control unit；
2) wheel speed signal of wheel speed signal generator is set in signal imitation generator, and wheel speed signal is set in fixation
Value, the fixed value of wheel speed signal is in 30km/h or more；
3) pressure value of the first and second brake pedal signal generators, brake pedal are set in signal imitation generator
The design of pressure of signal generator is in fixed value, and the fixed value of pressure value is in 80bar or more；
4) ABS control unit information is read in the full vehicle control unit diagnostic system in signal imitation generator；
5) phase of ABS control unit can be read in the full vehicle control unit diagnostic system such as in signal imitation generator
Information is closed, then the ABS control unit is working properly, being capable of entrucking use；Full vehicle such as in signal imitation generator controls single
The relevant information that the control unit cannot be read in first diagnostic system then illustrates the control unit operation irregularity or damage, needs more
It changes；
Full vehicle control unit detection pattern, comprising the following steps:
1) it reaches on maintenance station, closes the ignition switch of tested vehicle；
2) the control unit plug of tested vehicle is pulled out from connecting wire plug, ABS control unit is disconnected to be passed with former vehicle
The connection of sensor；
3) generator plug is connected to the generator input terminal of fault simulator, connecting wire plug is connected to failure mould
The former vehicle signal input part of quasi- device, the signal output end of fault simulator are connected to control unit plug, thus former vehicle sensor
Connect corresponding bridge position and measurement point it is in parallel with analog sensor, and former vehicle connection and supply lines are respectively connected to signal
The full vehicle control unit diagnostic system and OBD diagnostics port of simulative generator, signal imitation generator are connected to ABS control unit,
Connecting wire, connection and the supply lines of former vehicle sensor are connected to ABS control unit by bridge position and measurement point；
4) ignition switch of tested vehicle is opened；
5) the reading engine control of tested vehicle is checked by the full vehicle control unit diagnostic system of signal imitation generator
One in unit processed, automatic gear-box control unit, ABS control unit, Meter Control Unit and air bag control unit
Or the relevant information of multiple control units；
6) after testing, the connecting wire of removing vehicle braking system faults analog detection analyzer, grafting original vehicle is inserted
Head and control unit plug.
Under full vehicle control unit detection pattern, car key is accidentally placed on vehicle when vehicle, which has, latches function automatically
In, cause car door that can not open, automatic door opening the following steps are included:
1) engine compartment cover is opened；
2) the control unit plug of tested vehicle is pulled out from connecting wire plug, ABS control unit is disconnected to be passed with former vehicle
The connection of sensor；
3) generator plug is connected to the generator input terminal of fault simulator, connecting wire plug is connected to failure mould
The former vehicle signal input part of quasi- device, the signal output end of fault simulator are connected to control unit plug, thus former vehicle sensor
Connect corresponding bridge position and measurement point it is in parallel with analog sensor, and former vehicle connection and supply lines are respectively connected to signal
The full vehicle control unit diagnostic system and OBD diagnostics port of simulative generator, signal imitation generator are connected to ABS control unit,
Connecting wire, connection and the supply lines of former vehicle sensor are connected to ABS control unit by bridge position and measurement point；
4) external power supply in fault simulator powers to signal imitation generator and full vehicle；
5) entered in air bag control unit by full vehicle control unit diagnostic system, execute crash tests function, this
When car door lock can automatically open, take out interior key；
6) after, removing vehicle braking system faults analog detection analyzer, the connecting wire plug of grafting original vehicle with
Control unit plug.
It is finally noted that the purpose for publicizing and implementing example is to help to further understand the utility model, but originally
The technical staff in field is understood that in the spirit and scope for not departing from the utility model and the attached claims, various
Substitutions and modifications are all possible.Therefore, the utility model should not be limited to embodiment disclosure of that, and the utility model is wanted
Seek the range of protection subject to the scope defined in the claims.
Claims (10)
1. a kind of motor vehicle braking system fault simulation detection analysis instrument, which is characterized in that the fault simulation detection analysis instrument packet
It includes: signal imitation generator and fault simulator；Wherein, signal imitation generator occurs including first to fourth wheel speed signal
Device, first to fourth wheel speed adjustment button, first to fourth wheel speed signal output switch, the first and second brake pressure signals hair
Raw device, the first and second brake pressures adjustment button and output switch, brake pedal signal output switch, full vehicle control unit are examined
Disconnected system and onboard diagnostic system OBD diagnostics port, first to fourth wheel speed adjustment button are respectively connected to corresponding first to the
Four wheel speed signal generators, first to fourth wheel speed signal output switch are respectively connected to the generation of first to fourth wheel speed signal
Device, the first and second brake pressures adjustment button and output switch are respectively connected to the generation of the first and second brake pressure signals
Device, first to fourth wheel speed signal generator, the first and second brake pressure signal generators and brake pedal signal output are opened
Pass is referred to as analog sensor, each analog sensor, OBD diagnostics port and full vehicle control unit diagnostic system pass through respectively leads
Line is arranged on generator plug；Fault simulator includes generator input terminal, former vehicle signal input part, signal output end, event
Hindering setting member, one group of bridge position and one group of measurement point, one group of bridge position includes multipair bridge position, and one group of measurement point includes multipair
Measurement point, the both ends of a pair of of bridge position are connected to the both ends of a pair of of measurement point, every a pair of bridge position and measurement point with it is each
The connecting wire of root original vehicle sensor, connection and supply lines are corresponding, former vehicle signal input part be connected to one group of bridge position and
The second end of the first end of measurement point, one group of bridge position and measurement point is connected to signal output end, and generator input terminal is connected to
Signal output end；Control unit plug is pulled out from connecting wire plug, ABS control unit disconnects and former vehicle sensor, communication
And the connection of power supply；Generator plug is connected to the generator input terminal of fault simulator, and connecting wire plug is connected to failure
The former vehicle signal input part of simulator, the signal output end of fault simulator are connected to control unit plug, thus former vehicle sensing
The corresponding bridge position of device series connection and measurement point are in parallel with corresponding analog sensor, and former vehicle connection is by connecting accordingly
Bridge position and measurement point are connected in parallel to the full vehicle control unit diagnostic system and OBD diagnostics port of signal imitation generator respectively, power supply
Line is connected to signal imitation generator by the corresponding bridge position of series connection and measurement point, and signal imitation generator is connected to ABS control
Unit processed, connecting wire, connection and the supply lines of former vehicle sensor are connected to ABS control list by bridge position and measurement point
Member.
2. fault simulation detection analysis instrument as described in claim 1, which is characterized in that the fault simulation detection analysis instrument tool
Have ABS anti-lock test pattern, fault simulation detection pattern, wheel speed sensors detection pattern, ABS control unit detection pattern and
Full vehicle control unit detection pattern.
3. fault simulation detection analysis instrument as claimed in claim 2, which is characterized in that under ABS anti-lock test pattern, with
Connection and the corresponding bridge position of supply lines and measurement point are respectively provided with bridging plug；Select one or more in former vehicle sensor
A to disconnect with ABS control unit, corresponding bridge position disconnects and is not provided with bridging plug, other original vehicle sensors it is corresponding across
Bridging plug is respectively provided on contact, then the former vehicle sensor selected and ABS control unit disconnect, and open simultaneously corresponding simulation
The signal output switch of sensor, so that signal imitation generator exports corresponding wheel speed signal, brake pressure signal and braking
One of pedal signal is a variety of to ABS control unit.
4. fault simulation detection analysis instrument as claimed in claim 2, which is characterized in that under fault simulation detection pattern, with
Connection and the corresponding bridge position of supply lines and measurement point are respectively provided with bridging plug；The first to fourth of signal imitation generator
Wheel speed signal output switch, the first and second brake pressures adjustment button and output switch, brake pedal signal output switch are equal
It closes, passes through the connecting fault setting member on bridge position.
5. fault simulation detection analysis instrument as claimed in claim 2, which is characterized in that under wheel speed sensors detection pattern,
Bridge position corresponding with connection and supply lines and measurement point are respectively provided with bridging plug；In fault simulator with former vehicle first to
The corresponding bridge position of fourth round speed sensor plugs bridging plug, so that former first to fourth wheel speed sensors of vehicle are connected to ABS
Control unit, and first to fourth wheel speed signal of shutdown signal simulative generator exports switch, signal imitation generator
First to fourth wheel speed signal generator is disconnected to be exported with the signal of ABS control unit.
6. fault simulation detection analysis instrument as claimed in claim 2, which is characterized in that under ABS control unit detection pattern,
The connection with the connecting wire, connection and supply lines of former vehicle sensor is disconnected, i.e., is not provided with bridging plug on bridge position,
External power supply powers to signal imitation generator and ABS control unit in fault simulator.
7. fault simulation detection analysis instrument as claimed in claim 2, which is characterized in that in full vehicle control unit detection pattern
Under, since the full vehicle control unit of vehicle is connected in parallel by connection, the full vehicle in signal simulator controls single
First diagnostic system reads the related data information of each control unit of full vehicle.
8. fault simulation detection analysis instrument as described in claim 1, which is characterized in that the signal imitation generator further includes
Shell and circuit board, wherein first to fourth wheel speed signal generator, first to fourth wheel speed adjust button, first to fourth
Wheel speed signal exports switch, the first and second brake pressure signal generators, the first and second brake pressures adjust button and defeated
Switch, brake pedal signal output, full vehicle control unit diagnostic system and OBD diagnostics port switch are respectively provided on circuit boards out,
Circuit board is arranged in shell.
9. fault simulation detection analysis instrument as described in claim 1, which is characterized in that the full vehicle control unit diagnostic system
Including diagnostic equipment display screen and diagnostic equipment operation button, diagnostic equipment operation button is connected to diagnostic equipment display screen, connection connection
To diagnostic equipment display screen.
10. fault simulation detection analysis instrument as described in claim 1, which is characterized in that the fault setting element include across
Plug, patchcord, swept resistance, one or more fixed value resistances, positive short-circuit end and cathode short-circuit end are believed with former vehicle respectively
The supply lines of number input terminal；Wherein, bridging plug is extracted from cross-line point, and corresponding sensor and ABS control unit disconnect；Across
Line point connects swept resistance or insertion fixed resistance, i.e. fault setting conducting wire series resistance, and the connection of corresponding sensor is arranged
There are resistance in conducting wire；Cross-line point is connected to cathode short-circuit end, and the setting of corresponding connecting wire, communication line and supply lines is negative
Extremely short road；Bridge position is connected with each other by patchcord, multi-thread be shorted with each other is set.
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| CN201920042841.7U CN209400629U (en) | 2019-01-10 | 2019-01-10 | A kind of motor vehicle braking system fault simulation detection analysis instrument |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110630349A (en) * | 2019-09-27 | 2019-12-31 | 中国汽车技术研究中心有限公司 | An engine oil pressure temperature sensor signal simulation device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110630349A (en) * | 2019-09-27 | 2019-12-31 | 中国汽车技术研究中心有限公司 | An engine oil pressure temperature sensor signal simulation device |
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Address after: 100F, 10th Floor, China Merchants Building, 118 Jianguo Road, Chaoyang District, Beijing, 100020 Patentee after: Huaao Anxin Technical Service (Group) Co.,Ltd. Address before: 100F, 10th Floor, China Merchants Building, 118 Jianguo Road, Chaoyang District, Beijing, 100020 Patentee before: BEIJING HUA-AO AUTOMOBILE SERVICE CO.,LTD. |