CN106768586B - Electronic parking clamp clamping force method of calibration and system - Google Patents
Electronic parking clamp clamping force method of calibration and system Download PDFInfo
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- CN106768586B CN106768586B CN201611152412.2A CN201611152412A CN106768586B CN 106768586 B CN106768586 B CN 106768586B CN 201611152412 A CN201611152412 A CN 201611152412A CN 106768586 B CN106768586 B CN 106768586B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/28—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for testing brakes
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Abstract
The invention discloses a kind of electronic parking clamp clamping force method of calibration and systems, which comprises obtains the clamping force target value of vehicle electric stopping caliper to be verified；Obtain the required clamping force of vehicle electric stopping caliper to be verified；According to the required clamping force of the clamping force target value of the vehicle electric stopping caliper to be verified and the vehicle electric stopping caliper to be verified, the maximum resistance limit value of vehicle electric parking current supply circuit to be verified is determined；When the actual resistance of the vehicle electric parking current supply circuit to be verified is less than or equal to the maximum resistance limit value of the vehicle electric parking current supply circuit to be verified, determine that the vehicle electric stopping caliper clamping force to be verified is met the requirements.Whether the present invention meets the requirements in the first section of design from source verification vehicle electronic parking clamp clamping force, detects the completeness that electronic parking has function policy, shortening vehicle development period, reduction vehicle development cost in time.
Description
Technical field
The present invention relates to technical field of vehicle safety, more particularly to a kind of electronic parking clamp clamping force method of calibration and
System.
Background technique
With universal, safety pay attention to day by day of the people to vehicle of automobile.EPB (Electrical Park Brake,
Electronic brake system) replace conventional whip parking brake electronics manual brake button, by the provisional braking in driving conditions and stop
Long when property braking function after vehicle combines, and realizes stopping brake by electronic control mode.Electronic brake system is not
Braking effect can be changed because of the dynamics of driver, it is more safer than traditional pull rod parking brake.
But the completeness that traditional detection electronic parking has function policy is to arrive common vehicle under real vehicle environment
The problem of verifying or after market could find to find electronic parking, extend the vehicle development period, increase vehicle development at
This.
Summary of the invention
Based on this, it is necessary to detect the completeness that electronic parking has function policy under real vehicle environment for tradition, prolong
The long development cycle, provides a kind of electronic parking clamping force method of calibration and system at the problem of increasing development cost.
To achieve the goals above, the embodiment of technical solution of the present invention are as follows:
A kind of electronic parking clamp clamping force method of calibration, comprising the following steps:
Obtain the clamping force target value of vehicle electric stopping caliper to be verified；
Obtain the required clamping force of vehicle electric stopping caliper to be verified；
According to the clamping force target value of the vehicle electric stopping caliper to be verified and the vehicle electric parking to be verified
The required clamping force of clamp determines the maximum resistance limit value of vehicle electric parking current supply circuit to be verified；
When the actual resistance of the vehicle electric parking current supply circuit to be verified is less than or equal to the vehicle electrical to be verified
When the maximum resistance limit value of sub- parking current supply circuit, determine that the vehicle electric stopping caliper clamping force to be verified is met the requirements.
A kind of electronic parking clamp clamping force check system, comprising:
Clamping force target value obtains module, for obtaining the clamping force target value of vehicle electric stopping caliper to be verified；
Clamping force needed for clamp obtains module, for obtaining the required clamping force of vehicle electric stopping caliper to be verified；
Maximum resistance limit value determining module, for the clamping force target value according to the vehicle electric stopping caliper to be verified
With the required clamping force of the vehicle electric stopping caliper to be verified, the maximum of vehicle electric parking current supply circuit to be verified is determined
Resistance Limit；
Clamping force correction verification module is less than or waits for the actual resistance when the vehicle electric parking current supply circuit to be verified
When the maximum resistance limit value of the vehicle electric parking current supply circuit to be verified, the vehicle electric parking card to be verified is determined
Clamp clamp force is met the requirements.
Compared with prior art, the invention has the benefit that electronic parking clamp clamping force method of calibration of the present invention and
System obtains the clamping force target value of vehicle electric stopping caliper to be verified；Obtain the institute of vehicle electric stopping caliper to be verified
Need clamping force；According to the institute of the clamping force target value of vehicle electric stopping caliper to be verified and vehicle electric stopping caliper to be verified
Clamping force is needed, determines the maximum resistance limit value of vehicle electric parking current supply circuit to be verified；When vehicle electric parking to be verified supplies
When the actual resistance of electrical circuit is less than or equal to the maximum resistance limit value of vehicle electric parking current supply circuit to be verified, determine to school
An electronic parking clamp clamping force of validating the car is met the requirements.The present invention is designing first section from source verification vehicle electronic parking clamp folder
Whether clamp force meets the requirements, and detects the completeness that electronic parking has function policy in time, significantly shortens compared to real steering vectors
In the vehicle development period, vehicle development cost is reduced, while avoiding the occurrence of and having sold vehicle electric stopping caliper insufficient clamping force
The problem of.
Detailed description of the invention
Fig. 1 is electronic parking clamp clamping force method of calibration flow chart in one embodiment；
Fig. 2 is electronic parking system electrical architecture diagram in one embodiment；
Fig. 3 is that electronic parking clamp loop resistance tests schematic diagram in one embodiment；
Fig. 4 is based on electronic parking clamp clamping force method of calibration flow chart in method one shown in Fig. 1 specific example；
Fig. 5 is electronic parking clamp clamping force check system structural schematic diagram in one embodiment.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention more comprehensible, with reference to the accompanying drawings and embodiments, to this
Invention is described in further detail.It should be appreciated that the specific embodiments described herein are only used to explain the present invention,
And the scope of protection of the present invention is not limited.
Electronic parking clamp clamping force method of calibration in one embodiment, as shown in Figure 1, comprising the following steps:
Step S101: the clamping force target value of vehicle electric stopping caliper to be verified is obtained；
Here, electronic parking refers to the technology that stopping brake is realized by electronic control mode, EPB system in one embodiment
Electrical architecture figure is as shown in Figure 2.
Specifically, a certain experimental condition is set, the clamping force of vehicular electric machine stall to be verified is determined, which is arranged
For clamping force target value；
It is connect as shown in figure 3, being connected to the motor motor interface connector one end using the p-wire of default impedance, the other end
It is connected with default test power supply, electronic parking clamp is put into high-temperature cabinet, default test temperature are warming up to, to Temperature Distribution
After uniformly, power on after so that electronic parking clamp is clamped to motor rotation blockage, stops power supply power supply, acquired by pressure sensor
The change curve of clamping force of clamp during being clamped to motor rotation blockage, according to the change curve of the clamping force of acquisition determine to
Clamping force when vehicle motor rotation blockage is verified, such as in clamp clamping force ramp-up period, clamping force is taken to start the 0.8s that linearly climbs
Clamping force when clamping force afterwards is vehicular electric machine stall to be verified.
Step S102: the required clamping force of vehicle electric stopping caliper to be verified is obtained；
Here, the required clamping force of vehicle electric stopping caliper to be verified can obtain in the following manner:
According to the maximum parking gradient that the whole-car parameters of the vehicle to be verified and each preset standard require, determine to school
The clamping force validated the car when each preset standard requires motor rotation blockage in the parking gradient；
Maximum clamping force, the vehicle electric parking card to be verified are obtained from the clamping force that each preset standard requires
The required clamping force of pincers is equal to the maximum clamping force obtained.Whole-car parameters are vehicle important technological parameters.
Specifically, above-mentioned each preset standard is national standard GB 21670 and a certain company standard；
When the vehicle to be verified is static on the ramp that the maximum parking gradient required according to national standard GB 21670 determines
When motionless, the stress of the vehicle to be verified is analyzed, quality is fully loaded with according to the vehicle of the vehicle to be verified, tire radius, is had
The maximum that effect braking radius, specified coefficient of friction, specified coefficient of friction tolerance maximum value and national standard GB 21670 are required is stayed
The vehicle gradient determines the clamping force that national standard GB 21670 is required；
When the vehicle to be verified is static on the ramp that the maximum parking gradient required according to above-mentioned company standard determines
When motionless, the stress of the vehicle to be verified is analyzed, quality is fully loaded with according to the vehicle of the vehicle to be verified, tire radius, is had
The maximum parking gradient that effect braking radius, specified coefficient of friction and above-mentioned company standard require determines above-mentioned company standard requirement
Clamping force；
When the clamping force that national standard GB 21670 is required is greater than the clamping force that above-mentioned company standard requires, the vehicle to be verified
The required clamping force of electronic parking clamp is equal to the clamping force that national standard GB 21670 is required, otherwise, the vehicle electric to be verified
The required clamping force of stopping caliper is equal to the clamping force that above-mentioned company standard requires.
Step S103: according to the clamping force target value of the vehicle electric stopping caliper to be verified and the vehicle to be verified
The required clamping force of electronic parking clamp determines the maximum resistance limit value of vehicle electric parking current supply circuit to be verified；
Step S104: to school described in being less than or equal to when the actual resistance of the vehicle electric parking current supply circuit to be verified
Validate the car an electronic parking current supply circuit maximum resistance limit value when, determine that the vehicle electric stopping caliper clamping force to be verified is full
Foot requires.
Here, if the actual resistance of vehicle electric parking current supply circuit to be verified is greater than the vehicle electric parking to be verified
The maximum resistance limit value of current supply circuit, the vehicle electric stopping caliper clamping force to be verified are unsatisfactory for requiring, can be according to tool
Body vehicle reduces electricity by increasing the modes such as electronic parking current supply circuit line footpath, optimization electronic parking current supply circuit line alignment
The actual resistance of sub- parking current supply circuit, such as welding manner can be used and increase line footpath maximum value between two connectors, reduce
The actual resistance of electronic parking current supply circuit.
Specifically, the actual resistance of the vehicle electric parking current supply circuit to be verified is that the vehicle electric to be verified is stayed
When fuse resistance, total conductor resistance, stagnation pressure connecting resistance, total contact resistance and the electronic control unit of vehicle current supply circuit work
The sum of conducting resistance.
It is evidenced from the above discussion that electronic parking clamp clamping force method of calibration of the present invention, verifies designing first section from source
Whether vehicle electric stopping caliper clamping force meets the requirements, and detects the completeness that electronic parking has function policy in time, compares
The vehicle development period is significantly shortened in real steering vectors, reduces vehicle development cost, while avoiding the occurrence of and having sold vehicle electric
The problem of stopping caliper insufficient clamping force.
In addition, the required clamping force of the vehicle electric stopping caliper to be verified passes through following in a specific example
Mode obtains:
Obtain clamping of the vehicle to be verified in motor rotation blockage in the maximum parking gradient that each preset standard requires
Power；
By maximum clamping force in the clamping force in the maximum parking gradient that each preset standard requires when motor rotation blockage,
It is set as the required clamping force of the vehicle electric stopping caliper to be verified.
Here by taking national standard GB 21670 and a certain company standard as an example；
When the vehicle to be verified is static on the ramp that the maximum parking gradient required according to national standard GB 21670 determines
When motionless, the stress of the vehicle to be verified is analyzed, quality is fully loaded with according to the vehicle of the vehicle to be verified, tire radius, is had
The maximum that effect braking radius, specified coefficient of friction, specified coefficient of friction tolerance maximum value and national standard GB 21670 are required is stayed
The vehicle gradient determines the clamping force that national standard GB 21670 is required:Wherein iGBIndicate national standard most
The big parking gradient, requires according to 21670 performance of parking brake of GB, the selection of ramp in slope 20%；mGVWIndicate that vehicle is fully loaded with quality,
Units/kg；G indicates acceleration of gravity；RwIt indicates tire radius, the value of corresponding tire model, unit is selected according to GB/T 2978
mm；RbIndicate effective brake radius, unit mm；μ indicates specified coefficient of friction；Indicate the tolerance of specified coefficient of friction
Maximum value, according to requiring in GB5763, when 4 type high temp, allows maximum deviation absolute value to be 0.12.
When the vehicle to be verified is static on the ramp that the maximum parking gradient required according to above-mentioned company standard determines
When motionless, the stress of the vehicle to be verified is analyzed, quality is fully loaded with according to the vehicle of the vehicle to be verified, tire radius, is had
The maximum parking gradient that effect braking radius, specified coefficient of friction and above-mentioned company standard require determines above-mentioned company standard requirement
Clamping force:Wherein iQIndicate above-mentioned company standard requirement
The maximum parking gradient；mGVWIndicate that vehicle is fully loaded with quality, units/kg；G indicates acceleration of gravity；RwIndicate tire radius, according to
GB/T 2978 selects the value of corresponding tire model, unit mm；RbIndicate effective brake radius, unit mm；μ indicates specified friction
Coefficient.
When the clamping force that national standard GB 21670 is required is greater than the clamping force that above-mentioned company standard requires, the vehicle to be verified
The required clamping force of electronic parking clamp is equal to the clamping force that national standard GB 21670 is required, otherwise, the vehicle electric to be verified
The required clamping force of stopping caliper is equal to the clamping force that above-mentioned company standard requires.
In addition, the actual resistance of the vehicle electric parking current supply circuit to be verified is described in a specific example
Fuse resistance, total conductor resistance, stagnation pressure connecting resistance, total contact resistance and the electronics of vehicle electric parking current supply circuit to be verified
The sum of conducting resistance when control unit works；
Total conductor resistance is each conductor resistance sum of the vehicle electric parking current supply circuit to be verified；
The stagnation pressure connecting resistance is each connector conductors and terminal of the vehicle electric parking current supply circuit to be verified
The sum of resistance at crimping；
Total contact resistance is the contact resistance of each connector of the vehicle electric parking current supply circuit to be verified
The sum of.
The actual resistance R of vehicle electric parking current supply circuit to be verifiedsys=RECU+RW+RT+RC+RF, wherein RECUIt indicates
Conducting resistance when EPB ECU (Electronic Control Unit, electronic control unit) internal work is maximized 40, list
Position m Ω；RFIt indicates fuse resistance, is searched according to the practical type selecting of QJGAC 1230.003, unit m Ω；RWIndicate total conducting wire electricity
Resistance needs to arrange each section of object of confirmation, unit m Ω with practical harness for all conductor resistance sums；RTIndicate total crimping
Resistance crimps the sum of place's resistance, unit m Ω with cross-talk for all connector conductors；RCIt indicates total contact resistance, is patched to be all
The sum of part contact resistance, unit m Ω.
Wherein, total conductor resistance RW, crew module's form is arranged in for independent EPB ECU, are as follows: RW=(RW01+RW02+RW09
+…)×(1+0.0043*(T1-20))+(RW03+(RW04+RW05+RW06+RW07+RW08…)×2)×(1+0.0043*(T0-20))
ESP is integrated in enging cabin form for ECU, are as follows: RW=(RW01+RW02+RW03+RW08+RW09…)×(1+0.0043*(T1-
20))+((RW04+RW05+RW06+RW07+…)×2)×(1+0.0043*(T0-20))
Wherein RW01,RW02,RW03... wait it is all using W as the resistance of footnote, be each section lead resistance, unit m Ω；T0For vehicle
The maximum temperature (default takes 65) of body and chassis portion harness, unit DEG C；T1For enging cabin harness temperature (default takes 90,
Actual temp is selected according to real vehicle wire harness), unit DEG C.
Stagnation pressure connecting resistance RT, resistance is calculated according to pressure drop when 20A electric current according to QJGAC 1230.013, and by all terminals
It is added with conductor resistance, there are two a set of docking connectors, RT=RT01+RT02+…+RTn；Wherein RT01,RT02,RT03... wait institutes
There is the resistance using T as footnote, is that each section of connector crimps resistance, unit m Ω.
Total contact resistance RC, it is added according to QJGAC 1230.016 according to 4m Ω value, and by all connectors, RC=RC01
+RC02+…+RCn, wherein RC01,RC02,RC03... wait it is all using C as the resistance of footnote, be each section of connector contact resistance, unit m
Ω。
In addition, in a specific example, the clamping force target value of the vehicle electric stopping caliper to be verified includes the
One clamping force target value and the second clamping force target value, the first clamping force target value and the second clamping force target value are
Clamping force of the vehicle to be verified under different default experimental conditions when motor rotation blockage；
According to the clamping force target value of the vehicle electric stopping caliper to be verified and the vehicle electric parking to be verified
The required clamping force of clamp determines that the mode of the maximum resistance limit value of vehicle electric parking current supply circuit to be verified includes:
Obtain the first difference and described second of the second clamping force target value and the first clamping force target value
Second difference of clamping force target value and the required clamping force of the vehicle electric stopping caliper to be verified；
Determine the ratio of second difference Yu first difference；
Product after the ratio is multiplied with the first setting value is added with the second setting value, obtains the vehicle to be verified
The maximum resistance limit value of electronic parking current supply circuit.
Here, the first clamping force target value and the second clamping force target value determine in the following manner:
Obtain first clamping force target value of the vehicle to be verified under default first experimental condition when motor rotation blockage；
Obtain second clamping force target value of the vehicle to be verified under default second experimental condition when motor rotation blockage, institute
It states default first experimental condition and power supply in default second experimental condition is identical with clamp test temperature, it is described default
The impedance of p-wire is greater than the impedance of p-wire in default second experimental condition, the p-wire packet in first experimental condition
Include the p-wire between the p-wire between motor interface connector and motor and motor interface connector and power supply.
Specifically, as shown in figure 3, being connected to the motor motor interface connector one end using the p-wire of default impedance
It connecing, the other end is connected with default test power supply, and electronic parking clamp are put into high-temperature cabinet, default test temperature is warming up to,
After uniformity of temperature profile, power on after so that electronic parking clamp is clamped to motor rotation blockage, stops power supply power supply, pass through pressure
Sensor acquires the change curve of clamping force of clamp during being clamped to motor rotation blockage, according to the variation of the clamping force of acquisition
Curve determines that vehicle electric stopping caliper to be verified is clamped to the clamping force target value of vehicular electric machine stall to be verified.
Here preset at that the first impedance is 200m Ω and default second impedance is 50m Ω, test temperature: 90 DEG C (only clamp, it is more
Remaining harness must be outside sweat box)；Test supply voltage: 9V (according to 1523.028 operating voltage requirement of QJGAC)；Record clamps
In clamp clamping force ramp-up period, the clamping force for taking clamping force to start linearly to climb after 0.8s is clamping force target value for power selection.
Specifically, the maximum resistance limit value of electronic parking current supply circuit:Wherein
F1Indicate the clamping force obtained in above-mentioned test according to 200m Ω condition test, unit kN；F2Indicate in above-mentioned test according to
The clamping force that 50m Ω condition test obtains, unit kN；FMAXIndicate the required clamping force of vehicle electric stopping caliper to be verified.
In addition, in a specific example, when the actual resistance of the vehicle electric parking current supply circuit to be verified is greater than
When the maximum resistance limit value of the vehicle electric parking current supply circuit to be verified, by reducing the vehicle electric parking to be verified
Leading when fuse resistance, total conductor resistance, stagnation pressure connecting resistance, total contact resistance and the electronic control unit of current supply circuit work
Be powered any one or more in resistance, by the adjustment of the actual resistance of the vehicle electric parking current supply circuit to be verified to less than
Or the maximum resistance limit value equal to the vehicle electric parking current supply circuit to be verified.
Specifically, if the actual resistance of vehicle electric parking current supply circuit to be verified is supplied greater than vehicle electric parking to be verified
The maximum resistance limit value of electrical circuit, vehicle electric stopping caliper clamping force to be verified are unsatisfactory for requiring, can according to specific vehicle,
By increasing the modes such as electronic parking current supply circuit line footpath, optimization electronic parking current supply circuit line alignment, reduce described to school
It validates the car fuse resistance, total conductor resistance, stagnation pressure connecting resistance, total contact resistance and the electronic control of an electronic parking current supply circuit
It is any one or more in conducting resistance when cell operation, reduce the actual resistance of electronic parking current supply circuit, such as can
Line footpath maximum value between two connectors is increased using welding manner, reduces the actual resistance of electronic parking current supply circuit.
The above method in order to better understand, an electronic parking clamp clamping force verification side of the present invention detailed below
The application example of method.
As shown in figure 4, may comprise steps of:
Step S401: international ramp clamping force is calculated；
Here, the calculated clamping force in parking ramp according to as defined in national standard GB 21670, abbreviation national standard ramp clamping force.
Specifically, when vehicle to be verified is quiet on the ramp that the maximum parking gradient required according to national standard GB 21670 determines
When only motionless, the stress of vehicle to be verified is analyzed, quality, tire radius, effective brake are fully loaded with according to the vehicle of vehicle to be verified
The maximum parking gradient that radius, specified coefficient of friction, specified coefficient of friction tolerance maximum value and national standard GB 21670 are required,
Calculate above-mentioned international ramp clamping force:Wherein iGBIndicate national standard most
The big parking gradient, requires according to 21670 performance of parking brake of GB, the selection of ramp in slope 20%；mGVWIndicate that vehicle is fully loaded with quality,
Units/kg；G indicates acceleration of gravity；RwIt indicates tire radius, the value of corresponding tire model, unit is selected according to GB/T 2978
mm；RbIndicate effective brake radius, unit mm；μ indicates specified coefficient of friction；Indicate the tolerance of specified coefficient of friction
Maximum value, according to requiring in GB5763, when 4 type high temp, allows maximum deviation absolute value to be 0.12.
Step S402: project ramp clamping force is calculated；
Here, according to design maximum parking ramp (generally 30%) calculated clamping force of vehicle project demand, letter
Title project ramp clamping force.
Specifically, when vehicle to be verified is quiet on the ramp that the maximum parking gradient required according to above-mentioned company standard determines
When only motionless, the stress of vehicle to be verified is analyzed, quality, tire radius, effective brake are fully loaded with according to the vehicle of vehicle to be verified
The maximum parking gradient that radius, specified coefficient of friction and above-mentioned company standard require determines the project ramp folder of vehicle to be verified
Clamp force:Wherein iQIndicate that above-mentioned company standard requires most
The big parking gradient；mGVWIndicate that vehicle is fully loaded with quality, units/kg；G indicates acceleration of gravity；RwTire radius is indicated, according to GB/T
The value of 2978 selection corresponding tire models, unit mm；RbIndicate effective brake radius, unit mm；μ indicates specified coefficient of friction.
Step S403: more above-mentioned calculated international ramp clamping force and project ramp clamping force, when international ramp presss from both sides
Clamp force is greater than project ramp clamping force, and the required clamping force of vehicle electric stopping caliper to be verified is equal to international ramp clamping force,
Otherwise, the required clamping force of vehicle electric stopping caliper to be verified is equal to project ramp clamping force, i.e. FMAX=max { FGB,FQ,
Wherein FMAXIndicate the required clamping force of vehicle electric stopping caliper to be verified.
Step S404: first clamping force target of the vehicle to be verified under default first experimental condition when motor rotation blockage is obtained
Value and the second clamping force target value under default second experimental condition when motor rotation blockage；
Specifically, using the p-wire of default first impedance by one end of vehicular electric machine interface connector to be verified and to school
The other end of motor interface connector connect with default power supply of testing, and adjusts vehicle to be verified by the motor connection validated the car
After the temperature of sweat box locating for electronic parking clamp to default test temperature, obtains vehicle electric stopping caliper to be verified and be clamped to
First during the vehicular electric machine stall to be verified clamps force curve, determines the first clamping force according to the first clamping force curve
Target value；
Similarly, using the p-wire of default second impedance by one end of vehicular electric machine interface connector to be verified with it is to be verified
The motor of vehicle connects, and the other end of motor interface connector is connect with default test power supply, and adjust vehicle electrical to be verified
After the temperature of sweat box locating for sub- stopping caliper to default test temperature, obtain vehicle electric stopping caliper to be verified be clamped to
The second clamping force curve during vehicle motor rotation blockage is verified, the second clamping force target is determined according to the second clamping force curve
Value；
As shown in figure 3, using the p-wire of default impedance (200m Ω or 50m Ω) by motor interface connector one end and electricity
Machine is connected, and the other end is connected with default test power supply, and electronic parking clamp are put into high-temperature cabinet, default test is warming up to
Temperature powers on after so that electronic parking clamp is clamped to motor rotation blockage after uniformity of temperature profile, stops power supply power supply, leads to
The change curve of clamping force of over-voltage force snesor capture card pincers during being clamped to motor rotation blockage, according to the clamping force of acquisition
First clamping force target value and second clamping force target value of the change curve when determining vehicular electric machine stall to be verified.
Here preset at that the first impedance is 200m Ω and default second impedance is 50m Ω, test temperature: 90 DEG C (only clamp, it is more
Remaining harness must be outside sweat box)；Test supply voltage: 9V (according to 1523.028 operating voltage requirement of QJGAC)；Record clamps
In clamp clamping force ramp-up period, the clamping force for taking clamping force to start linearly to climb after 0.8s is clamping force target value for power selection.
Step S405: according to the first clamping force target value of vehicle electric stopping caliper to be verified, the second clamping force target
The required clamping force of value and vehicle electric stopping caliper to be verified determines the maximum electricity of vehicle electric parking current supply circuit to be verified
Resistance limit value mode include:
Specifically, the maximum resistance limit value of electronic parking current supply circuit:Wherein
F1Indicate the clamping force obtained in above-mentioned test according to 200m Ω condition test, unit kN；F2Indicate in above-mentioned test according to
The clamping force that 50m Ω condition test obtains, unit kN；FMAXIndicate the required clamping force of vehicle electric stopping caliper to be verified.
Step S406: the actual resistance of vehicle electric parking current supply circuit to be verified is calculated；
Specifically, the actual resistance R of vehicle electric parking current supply circuit to be verifiedsys=RECU+RW+RT+RC+RF, wherein
RECUIt indicates conducting resistance when EPB ECU internal work, is maximized 40, unit m Ω；RFIndicate fuse resistance, foundation
The practical type selecting of QJGAC 1230.003 is searched, unit m Ω；RWIt indicates total conductor resistance, for all conductor resistance sums, needs
Each section of object of confirmation, unit m Ω are arranged with practical harness；RTStagnation pressure connecting resistance is indicated, for all connector conductors and cross-talk
The sum of resistance at crimping, unit m Ω；RCTotal contact resistance is indicated, for the sum of all connector contact resistances, unit m Ω.
Wherein, total conductor resistance RW, crew module's form is arranged in for independent EPB ECU, are as follows: RW=(RW01+RW02+RW09
+…)×(1+0.0043*(T1-20))+(RW03+(RW04+RW05+RW06+RW07+RW08…)×2)×(1+0.0043*(T0-20))
ESP is integrated in enging cabin form for ECU, are as follows: RW=(RW01+RW02+RW03+RW08+RW09…)×(1+0.0043*(T1-
20))+((RW04+RW05+RW06+RW07+…)×2)×(1+0.0043*(T0-20))
Wherein RW01,RW02,RW03... wait it is all using W as the resistance of footnote, be each section lead resistance, unit m Ω；T0For vehicle
The maximum temperature (default takes 65) of body and chassis portion harness, unit DEG C；T1For enging cabin harness temperature (default takes 90,
Actual temp is selected according to real vehicle wire harness), unit DEG C.
Stagnation pressure connecting resistance RT, resistance is calculated according to pressure drop when 20A electric current according to QJGAC 1230.013, and by all terminals
It is added with conductor resistance, there are two a set of docking connectors, RT=RT01+RT02+…+RTn；Wherein RT01,RT02,RT03... wait institutes
There is the resistance using T as footnote, is that each section of connector crimps resistance, unit m Ω.
Total contact resistance RC, it is added according to QJGAC 1230.016 according to 4m Ω value, and by all connectors, RC=RC01
+RC02+…+RCn, wherein RC01,RC02,RC03... wait it is all using C as the resistance of footnote, be each section of connector contact resistance, unit m
Ω。
Step S407: when the actual resistance of vehicle electric parking current supply circuit to be verified is less than or equal to vehicle electrical to be verified
When the maximum resistance limit value of sub- parking current supply circuit, determine that vehicle electric stopping caliper clamping force to be verified is met the requirements.
Here, if the actual resistance of vehicle electric parking current supply circuit to be verified is powered greater than vehicle electric parking to be verified
The maximum resistance limit value in circuit, vehicle electric stopping caliper clamping force to be verified are unsatisfactory for requiring, and can be led to according to specific vehicle
The modes such as increase electronic parking current supply circuit line footpath, optimization electronic parking current supply circuit line alignment are crossed, reduces electronic parking and supplies
The actual resistance of electrical circuit, such as welding manner can be used and increase line footpath maximum value between two connectors, reduce electronic parking
The actual resistance of current supply circuit.
Step S408: when the actual resistance of vehicle electric parking current supply circuit to be verified is greater than vehicle electric parking to be verified
When the maximum resistance limit value of current supply circuit, by reducing the fuse resistance of vehicle electric parking current supply circuit to be verified, always leading
It is any one or more in conducting resistance when line resistance, stagnation pressure connecting resistance, total contact resistance and electronic control unit work,
By the actual resistance adjustment of vehicle electric parking current supply circuit to be verified to less than or equal to vehicle electric parking to be verified power supply
The maximum resistance limit value in circuit.
Specifically, if the actual resistance of vehicle electric parking current supply circuit to be verified is supplied greater than vehicle electric parking to be verified
The maximum resistance limit value of electrical circuit, vehicle electric stopping caliper clamping force to be verified are unsatisfactory for requiring, can according to specific vehicle,
By increasing the modes such as electronic parking current supply circuit line footpath, optimization electronic parking current supply circuit line alignment, reduce vehicle to be verified
Fuse resistance, total conductor resistance, stagnation pressure connecting resistance, total contact resistance and the electronic control unit of electronic parking current supply circuit
It is any one or more in conducting resistance when work, reduce the actual resistance of electronic parking current supply circuit, such as can be used
Welding manner increases line footpath maximum value between two connectors, reduces the actual resistance of electronic parking current supply circuit.
It is evidenced from the above discussion that the present embodiment determines to be verified according to international ramp clamping force and project ramp clamping force
The required clamping force of vehicle electric stopping caliper；Under default experimental condition, determine that vehicle electric stopping caliper to be verified clamps
To the clamping force target value of vehicular electric machine stall to be verified；According to the clamping force target value of vehicle electric stopping caliper to be verified and
The required clamping force of vehicle electric stopping caliper to be verified determines the maximum resistance limit of vehicle electric parking current supply circuit to be verified
Value；When the actual resistance of vehicle electric parking current supply circuit to be verified is less than or equal to vehicle electric parking current supply circuit to be verified
Maximum resistance limit value when, determine that vehicle electric stopping caliper clamping force to be verified is met the requirements, design just section from source school
Whether an electronic parking clamp clamping force of validating the car meets the requirements, and detects the completeness that electronic parking has function policy, phase in time
Than significantly shortening the vehicle development period in real steering vectors, vehicle development cost is reduced, while avoiding the occurrence of and having sold vehicle electrical
The problem of sub- stopping caliper insufficient clamping force.When calculation method and accurate parameter, the present embodiment can be in the extreme work of system simultaneously
Electronic parking clamp clamping force is verified under condition, meets practical application needs.
Electronic parking clamp clamping force check system in one embodiment, as shown in Figure 5, comprising:
Clamping force target value obtains module 501, for obtaining the clamping force target value of vehicle electric stopping caliper to be verified；
Clamping force needed for clamp obtains module 502, for obtaining the required clamping force of vehicle electric stopping caliper to be verified；
Maximum resistance limit value determining module 503, for the clamping force mesh according to the vehicle electric stopping caliper to be verified
The required clamping force of scale value and the vehicle electric stopping caliper to be verified, determines vehicle electric parking current supply circuit to be verified
Maximum resistance limit value；
Clamping force correction verification module 504 is less than for the actual resistance when the vehicle electric parking current supply circuit to be verified
Or equal to the vehicle electric parking current supply circuit to be verified maximum resistance limit value when, determine that the vehicle electric to be verified is stayed
Vehicle clamp clamping force is met the requirements.
In addition, in a specific embodiment, clamping force needed for the clamp obtains vehicle to be verified described in module 502
The required clamping force of electronic parking clamp obtains in the following manner:
Obtain clamping of the vehicle to be verified in motor rotation blockage in the maximum parking gradient that each preset standard requires
Power；
By maximum clamping force in the clamping force in the maximum parking gradient that each preset standard requires when motor rotation blockage,
It is set as the required clamping force of the vehicle electric stopping caliper to be verified.
In addition, in a specific embodiment, vehicle electric parking to be verified described in the clamping force correction verification module 504
The actual resistance of current supply circuit is the fuse resistance of the vehicle electric parking current supply circuit to be verified, total conductor resistance, total
Crimp the sum of conducting resistance when resistance, total contact resistance and electronic control unit work；
Total conductor resistance is each conductor resistance sum of the vehicle electric parking current supply circuit to be verified；
The stagnation pressure connecting resistance is each connector conductors and terminal of the vehicle electric parking current supply circuit to be verified
The sum of resistance at crimping；
Total contact resistance is the contact resistance of each connector of the vehicle electric parking current supply circuit to be verified
The sum of.
In addition, in a specific embodiment, the clamping force target value obtains vehicle electrical to be verified described in module 501
The clamping force target value of sub- stopping caliper includes the first clamping force target value and the second clamping force target value, first clamping force
Target value and the second clamping force target value are clamping of the vehicle to be verified in motor rotation blockage under Bu Tong presetting experimental condition
Power；
As shown in figure 5, the maximum resistance limit value determining module 503 includes:
The first difference of clamping force obtaining unit 5031 is clamped for obtaining the second clamping force target value and described first
First difference of power target value；
The second difference of clamping force obtaining unit 5032, for obtaining the second clamping force target value and the vehicle to be verified
Second difference of the required clamping force of electronic parking clamp；
Clamping force ratio determination unit 5033, for determining the ratio of second difference Yu first difference；
Maximum resistance limit value determination unit 5034, for the product and second after the ratio is multiplied with the first setting value
Setting value is added, and obtains the maximum resistance limit value of the vehicle electric parking current supply circuit to be verified.
As shown in figure 5, in a specific embodiment, the electronic parking clamp clamping force check system further includes reality
Resistance adjusts module 505, is greater than for the actual resistance when the vehicle electric parking current supply circuit to be verified described to be verified
When the maximum resistance limit value of vehicle electric parking current supply circuit, by reducing the vehicle electric parking current supply circuit to be verified
In conducting resistance when fuse resistance, total conductor resistance, stagnation pressure connecting resistance, total contact resistance and electronic control unit work
It is any one or more, by the actual resistance adjustment of the vehicle electric parking current supply circuit to be verified to less than or it is equal to described
The maximum resistance limit value of vehicle electric parking current supply circuit to be verified.
It is evidenced from the above discussion that electronic parking clamp clamping force check system of the present invention, verifies designing first section from source
Whether vehicle electric stopping caliper clamping force meets the requirements, and detects the completeness that electronic parking has function policy in time, compares
The vehicle development period is significantly shortened in real steering vectors, reduces vehicle development cost, while avoiding the occurrence of and having sold vehicle electric
The problem of stopping caliper insufficient clamping force.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of electronic parking clamp clamping force method of calibration, which comprises the following steps:
Obtain the clamping force target value of vehicle electric stopping caliper to be verified；
Obtain the required clamping force of vehicle electric stopping caliper to be verified；
According to the clamping force target value of the vehicle electric stopping caliper to be verified and the vehicle electric stopping caliper to be verified
Required clamping force, determine the maximum resistance limit value of vehicle electric parking current supply circuit to be verified；
It is stayed when the actual resistance of the vehicle electric parking current supply circuit to be verified is less than or equal to the vehicle electric to be verified
When the maximum resistance limit value of vehicle current supply circuit, determine that the vehicle electric stopping caliper clamping force to be verified is met the requirements.
2. electronic parking clamp clamping force method of calibration according to claim 1, which is characterized in that the vehicle to be verified
The required clamping force of electronic parking clamp obtains in the following manner:
Obtain clamping force of the vehicle to be verified in motor rotation blockage in the maximum parking gradient that each preset standard requires；
By maximum clamping force in the clamping force in the maximum parking gradient that each preset standard requires when motor rotation blockage, setting
For the required clamping force of the vehicle electric stopping caliper to be verified.
3. electronic parking clamp clamping force method of calibration according to claim 1, which is characterized in that the vehicle to be verified
The actual resistance of electronic parking current supply circuit is fuse resistance, the total conducting wire of the vehicle electric parking current supply circuit to be verified
The sum of conducting resistance when resistance, stagnation pressure connecting resistance, total contact resistance and electronic control unit work；
Total conductor resistance is each conductor resistance sum of the vehicle electric parking current supply circuit to be verified；
The stagnation pressure connecting resistance is each connector conductors and terminal compression joint of the vehicle electric parking current supply circuit to be verified
Locate the sum of resistance；
Total contact resistance is the sum of the contact resistance of each connector of the vehicle electric parking current supply circuit to be verified.
4. electronic parking clamp clamping force method of calibration as claimed in any of claims 1 to 3, which is characterized in that
The clamping force target value of the vehicle electric stopping caliper to be verified includes the first clamping force target value and the second clamping force target
Value, the first clamping force target value and the second clamping force target value are that vehicle to be verified is Bu Tong being preset under experimental condition
Clamping force when motor rotation blockage；Wherein, the default experimental condition includes default first impedance and presets the second impedance, described pre-
If the first impedance is greater than default second impedance；
According to the clamping force target value of the vehicle electric stopping caliper to be verified and the vehicle electric stopping caliper to be verified
Required clamping force, determine that the mode of the maximum resistance limit value of vehicle electric parking current supply circuit to be verified includes:
The first difference and described second for obtaining the second clamping force target value and the first clamping force target value clamp
Second difference of power target value and the required clamping force of the vehicle electric stopping caliper to be verified；
Determine the ratio of second difference Yu first difference；
Product after the ratio is multiplied with the first setting value is added with the second setting value, obtains the vehicle electric to be verified
The maximum resistance limit value of parking current supply circuit；Wherein, first setting value is default first impedance and described default the
The difference of two impedances；Second setting value is default second impedance.
5. electronic parking clamp clamping force method of calibration according to claim 3, which is characterized in that when the vehicle to be verified
The actual resistance of electronic parking current supply circuit is greater than the maximum resistance limit value of the vehicle electric parking current supply circuit to be verified
When, by reduce the fuse resistance of the vehicle electric parking current supply circuit to be verified, total conductor resistance, stagnation pressure connecting resistance,
It is any one or more in conducting resistance when total contact resistance and electronic control unit work, by the vehicle electrical to be verified
The actual resistance of sub- parking current supply circuit adjust to less than or equal to the vehicle electric parking current supply circuit to be verified maximum
Resistance Limit.
6. a kind of electronic parking clamp clamping force check system characterized by comprising
Clamping force target value obtains module, for obtaining the clamping force target value of vehicle electric stopping caliper to be verified；
Clamping force needed for clamp obtains module, for obtaining the required clamping force of vehicle electric stopping caliper to be verified；
Maximum resistance limit value determining module, for according to the vehicle electric stopping caliper to be verified clamping force target value and institute
The required clamping force for stating vehicle electric stopping caliper to be verified determines the maximum resistance of vehicle electric parking current supply circuit to be verified
Limit value；
Clamping force correction verification module is less than or equal to institute for the actual resistance when the vehicle electric parking current supply circuit to be verified
When stating the maximum resistance limit value of vehicle electric parking current supply circuit to be verified, the vehicle electric stopping caliper folder to be verified is determined
Clamp force is met the requirements.
7. electronic parking clamp clamping force check system according to claim 6, which is characterized in that folder needed for the clamp
The required clamping force that clamp force obtains vehicle electric stopping caliper to be verified described in module obtains in the following manner:
Obtain clamping force of the vehicle to be verified in motor rotation blockage in the maximum parking gradient that each preset standard requires；
By maximum clamping force in the clamping force in the maximum parking gradient that each preset standard requires when motor rotation blockage, setting
For the required clamping force of the vehicle electric stopping caliper to be verified.
8. electronic parking clamp clamping force check system according to claim 6, which is characterized in that the clamping force verification
The actual resistance of vehicle electric parking current supply circuit to be verified described in module is that the vehicle electric parking to be verified is powered back
Conducting resistance when fuse resistance, total conductor resistance, stagnation pressure connecting resistance, total contact resistance and the electronic control unit on road work
Sum；
Total conductor resistance is each conductor resistance sum of the vehicle electric parking current supply circuit to be verified；
The stagnation pressure connecting resistance is each connector conductors and terminal compression joint of the vehicle electric parking current supply circuit to be verified
Locate the sum of resistance；
Total contact resistance is the sum of the contact resistance of each connector of the vehicle electric parking current supply circuit to be verified.
9. the electronic parking clamp clamping force check system according to any one of claim 6 to 8, which is characterized in that
The clamping force target value that the clamping force target value obtains vehicle electric stopping caliper to be verified described in module includes the first folder
Clamp force target value and the second clamping force target value, the first clamping force target value and the second clamping force target value are to school
Validate the car the motor rotation blockage under different default experimental conditions when clamping force；Wherein, the default experimental condition includes default the
One impedance and default second impedance, default first impedance are greater than default second impedance；
The maximum resistance limit value determining module includes:
Clamping force the first difference obtaining unit, for obtaining the second clamping force target value and the first clamping force target value
The first difference；
Clamping force the second difference obtaining unit is stayed for obtaining the second clamping force target value with the vehicle electric to be verified
Second difference of the required clamping force of vehicle clamp；
Clamping force ratio determination unit, for determining the ratio of second difference Yu first difference；
Maximum resistance limit value determination unit, for the product and the second setting value phase after the ratio is multiplied with the first setting value
Add, obtains the maximum resistance limit value of the vehicle electric parking current supply circuit to be verified；Wherein, first setting value is described
The difference of default first impedance and default second impedance；Second setting value is default second impedance.
10. electronic parking clamp clamping force check system according to claim 8, which is characterized in that further include practical electricity
Resistance adjustment module is greater than the vehicle electrical to be verified for the actual resistance when the vehicle electric parking current supply circuit to be verified
When the maximum resistance limit value of sub- parking current supply circuit, by the fuse for reducing the vehicle electric parking current supply circuit to be verified
It is any one in conducting resistance when resistance, total conductor resistance, stagnation pressure connecting resistance, total contact resistance and electronic control unit work
Item is multinomial, by the actual resistance adjustment of the vehicle electric parking current supply circuit to be verified to less than or is equal to described to be verified
The maximum resistance limit value of vehicle electric parking current supply circuit.
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| CN201611152412.2A CN106768586B (en) | 2016-12-14 | 2016-12-14 | Electronic parking clamp clamping force method of calibration and system |
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| CN201611152412.2A CN106768586B (en) | 2016-12-14 | 2016-12-14 | Electronic parking clamp clamping force method of calibration and system |
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| CN106768586B true CN106768586B (en) | 2019-04-02 |
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| CN114212063B (en) * | 2021-12-31 | 2023-02-17 | 中国第一汽车股份有限公司 | Method and device for determining electronic parking clamping force |
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