CN106769106A - The ramp parking simulating test device and method of testing of automobile P gear systems - Google Patents
The ramp parking simulating test device and method of testing of automobile P gear systems Download PDFInfo
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- CN106769106A CN106769106A CN201710149849.9A CN201710149849A CN106769106A CN 106769106 A CN106769106 A CN 106769106A CN 201710149849 A CN201710149849 A CN 201710149849A CN 106769106 A CN106769106 A CN 106769106A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
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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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- 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
- G01L5/284—Measuring braking-time or braking distance
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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
- G01L5/288—Measuring the force necessary to rotate a braked wheel
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
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Abstract
The invention provides the ramp parking simulating test device and method of testing of a kind of automobile P gear systems, including master controller (5), be provided with P gears parking system (4) reduction box (1) and reduction box input shaft or output shaft connection motor (2) and motor (2) connection for providing reduction box equivalent ramp parking moment of torsion size and the electric machine controller (3) in direction for the moment of torsion that controls motor (2) to provide reduction box.The present invention can change tested hill gradient by changing the output torque of motor, and whole test process can not have the acclive level land to carry out, and have a wide range of application, and simple structure, low cost.And in the long duration test of enterprises do-it-yourself and performance test, saving external coordination experimentation cost and the R＆D cycle can be shortened.Method of testing process of the invention is simplified, safe and reliable.
Description
Technical field
The present invention relates to auto parts and components measuring technology, particularly, it is related to a kind of ramp parking of automobile P gears system to simulate
Test device and method of testing.
Background technology
Parking brake is substantially the standard configuration of all automobiles, and for parking, after preventing driver from leaving vehicle, abnormal slipping occurs in vehicle
Car causes security incident.But parking brake is substantially the brake gear locking wheel that trailing wheel is pulled by drag-line, prevents vehicle from slipping
Car.But the dynamics that parking brake is tensed varies with each individual, and drag-line can also have situation about being broken during stretcher strain, or even parking, deposit
In potential safety hazard.Therefore increasing automobile starts to be equipped with reduction box P gear systems, the power transmission shaft of locking reduction box during parking.
All vehicles have been forced to be equipped with reduction box P gear systems in Europe.Referring to Fig. 1, reduction box P gear systems refer to collect inside reduction box
(the P gear parking execution units in such as Fig. 1 include staying to keep off parking execution unit into a set of P with output shaft a direct or indirect connections
Skiving wheel b and park pawl c).Its function is mechanically locking power transmission shaft, forbids power transmission shaft to rotate, so as to prevent car
Car slipping.
The reliability requirement of reduction box P gear systems is very high, such as on ramp during parking, the power of vehicle car slipping, all
May be transformed into above P gear parking gears, very big pressure can be produced between parking gear and the engaging tooth of park pawl, this
When P gear system can normally parking, can (parking gear is separated with park pawl) when driver requested releasing suitable
Profit is released, and is required for carrying out substantial amounts of reliability test.
The general direct entrucking of existing P gear System Reliability Test method carries out vehicle road test, on ramp by
People's operation starts parking and releases parking, it is necessary to take larger experimental site repeatedly, and due to needing artificial operation, is not easy to
Durability test is carried out to P gears, testing efficiency is not high, test, high cost long with the R＆D cycle.
Chinese patent 201610236906.2 discloses a kind of automobile electronic parking braking system simulator, and the program sets
Mechanical dip angle adjusting mechanism is equipped with, the gradient is simulated by the controllable closed-loop system of servomotor and obliquity sensor composition
And angle calibration is carried out, its dip angle adjusting mechanism is adjusted to required angle, restarts clamp device for testing clamping force between pair
Electronic parking performs mechanism of car and is clamped power test, because its gradient is adjusted by dip angle adjusting mechanism, when same parking
Brakes needs to carry out when various gradients are tested, it is necessary to the continuous angle of variable inclinations adjustment mechanism, and testing efficiency is not high,
Influence R＆D cycle and production cost, and whole system part is numerous and diverse, is unfavorable for the control of process, further, since the program exists
There is the actual gradient in test process, to ensure safety, it is necessary to be equipped with special place, limit it and use scope.
The content of the invention
Present invention aim at the ramp parking simulating test device and method of testing that provide a kind of automobile P gear system, with
Solve the problems, such as to be proposed in technical background technology.
To achieve the above object, the invention provides the ramp parking simulating test device that a kind of automobile P keeps off system, including
Master controller 5, be provided with P gear parking system 4 reduction box 1 and reduction box input shaft or output shaft connection for slow down
Case provide motor 2 and motor 2 connection of equivalent ramp parking moment of torsion for controlling motor 2 to reduction box
The size of the moment of torsion of offer and the electric machine controller 3 in direction；
Slip by slope torques of the equivalent ramp parking torque T m more than or equal to automobile parking when ramp (slips by slope power generation
Torque), i.e.,：
During the connection reduction box input shaft of motor 2,
During the connection reduction gearbox output shaft of motor 2, Tm≥Gsin(θ)R；
In formula, G be the vehicle gravity value (N) of the car of institute's simulation test, θ be the value of slope (°) of simulation test, R be institute's mould
It is reduction box resultant gear ratio to intend the radius of wheel (m) of the car of test, i；
P gear parking system 4 include with the P gear parkings execution unit 41 of the output shaft direct or indirect connection of reduction box 1,
The P for driving P to keep off the action of parking execution unit 41 be connected with P gears parking execution unit 41 keeps off drive device 42, for examining
Survey whether P gear parkings execution unit 41 is suspended to position or is retracted into the shift sensor 43 of initial position, the P keeps off parking system 4
P gear control units 44 are also included, the P gear drive devices 42 are electrically connected with shift sensor 43 by P gear control units 44
Control, P gear control units 44 are used to start or stop P gear drive devices 42 and the P gears of the reception transmission of shift sensor 43 are stayed
The position signalling of car execution unit 41；
The electric machine controller 3 include for output driving motor reduction box input shaft or output shaft are applied it is instant
The torque feedback unit of torque value and for output driving motor and reduction box input shaft or the car of the instant tachometer value of output shaft
Fast feedback unit；
The electric machine controller 3 is connected by communication line with P gear control units 44 with master controller 5, and master controller connects
It is defeated that the position signalling of the P gear parking execution units of the receipts P gear feedbacks of control unit 44, electric machine controller torque feedback unit feed back
Enter the reduction box input shaft or the instant rotating speed of output shaft of instant torque value and speed feedback the unit feedback of axle or output shaft
Signal, and the position signalling of parking execution unit and the instant moment of torsion of reduction box input shaft or output shaft, rotating speed letter are kept off according to P
Number and to electric machine controller 3 send apply or remove equivalent ramp parking moment of torsion signal and to P gear control unit 44 send
Hang P gears or pluck the signal of P gears, hang P gear tests and be specially：P gear execution units are driven to move to position of putting into gear in P gear drive devices 42
Postpone, start motor and apply equivalent ramp parking moment of torsion to reduction box input shaft or output shaft, then judge whether P gears are hung into
Work(；P gears are carried out after P gears are put into gear successfully and plucks gear test, P gears are plucked gear test and are specially：Motor is set to keep defeated to reduction box
Enter the equivalent ramp parking moment of torsion that axle or output shaft apply, P gear drive devices 42 drive P gear execution units to move to and pluck gear
Put, judge that P gears pluck whether gear succeeds, pluck and equivalent ramp parking moment of torsion is removed after keeping off successfully and is completed P gears and is released test.
The communication line uses CAN 6, the electric machine controller 3, P gear control unit 44 to be all provided with master controller 5
There is CAN interface, electric machine controller 3, P gear control unit 44 is electrically connected to form loop with master controller 5 by CAN.
The specific embodiment of motor and its electric machine controller, can be using on simulated electric automobile, with quilt
Survey the product motor and controller that reduction box is matched.Its motor has the ready-made interface size matched with reduction box, no
Need to make independent frock, reduces cost shortens the cycle.Its electric machine controller can give entire car controller exploitation CAN communication association
View, ambient controller can be exported by CAN with the torque output of controlled motor and rotating speed, at the same electric machine controller can by moment of torsion,
The signal of rotating speed is sent out in real time by CAN, such system do not need additionally mounted torque sensor and velocity sensor with
And corresponding signal picker, can at utmost reduces cost, while also closest to actual effect.
The master controller is provided with firing test switch and stopping test switch for the process of manual Control experiment,
The master controller is additionally provided with the P position switch for the action of manual start and stop P gears.
Further, motor is sent out after the output shaft or input shaft of the reduction box are connected with for preventing P from keeping off releasing
The inertial flywheel 7 of raw driving phenomenon.
The present invention provides a kind of test side always according to the ramp parking simulating test device of electric automobile P gear systems
Method, comprises the following steps：
S1 P gears are hung in) parking：When the reduction box input shaft rotating speed of speed feedback unit feedback is 0, master controller keeps off to P
Control unit sends the signal for hanging P gears, and P gear control units start P gear drive devices, parking execution unit is acted and is put into gear.
In the case where reduction box is static, control P gear lockings are equivalent to driver and slam brake, and P gears are hung under dead ship condition；It is specific real
The process of applying is that master controller sends to P gear control units hangs P gear instructions, and P gear control unit execute instructions, motor is hung into P
Gear, and be confirmed whether to be suspended to position according to shift sensor signal.
S2 equivalent ramp moment of torsion) is applied：Judge whether the P gears of shift sensor feedback put be suspended to position, if P gears are not suspended to
Position, then be back to step S1, if P gears have been suspended to position, master controller sends to electric machine controller and applies equivalent ramp parking moment of torsion
Signal, electric machine controller start motor, make motor output torque be equal to equivalent ramp parking moment of torsion, judge car
If not whether the reduction box input shaft or the instant rotating speed of output shaft of fast test cell feedback are 0,0 shows that P gears are put into gear unsuccessfully,
Output test result, next step is entered if rotating speed is 0.Now locking P keeps off reduction box, and input shaft cannot rotate, and apply
Moment of torsion on input shaft, can keep off parking gear in parking execution unit and be delivered in park pawl by P.Its stressed effect phase
After P being hung on ramp and is kept off in vehicle, the effect of releasing of brake.If reduction box does not rotate after applying moment of torsion, illustrate that P gears exist
Parking success above ramp.Apply moment of torsion implementation process be：Master controller sends mesh by communication line to electric machine controller
Mark moment of torsion (i.e. equivalent ramp parking moment of torsion), after electric machine controller receives the target torque of master controller, controlled motor output
The torque value of master controller requirement, the torque value is more than or equal to slipping by slope torque.
S3) judge that the P gears of shift sensor feedback are put whether to stablize, if unstable rule shows that P gears are put into gear unsuccessfully, output
Test result, enters next step if stabilization；
S4) judge whether the input shaft or the instant moment of torsion of output shaft of torsion-testing unit feedback are turned round equal to equivalent ramp parking
Square, if being less than equivalent ramp parking moment of torsion, is back to step S2, if being more than or equal to equivalent ramp parking moment of torsion, hangs P gears
Success, outputs test result.
The ramp parking analog detection method of the automobile P gears system is also provided with releasing P gears after P gears are put into gear successfully and surveys
Examination process, specifically includes following steps：
S5) band moment of torsion plucks P gears：Master controller continues to keep to apply letter to the equivalent ramp parking moment of torsion of electric machine controller
Number, while asking P gear control units to pluck P gears, P gear control units start P gear drive devices, parking execution unit is acted and is moved back
Gear；P gear control units are performed after receiving request, and now reduction box input shaft is with equivalent ramp parking moment of torsion, park tooth
Between wheel and park pawl, and executing agency bears the pressure of moment of torsion generation, now plucks P gears, is equivalent to vehicle in ramp
In the case of parking, P gears are exited in driver's control.Now system will detect that P gears are put and motor speed, once turning occurs in motor
Speed, illustrates that P keeps off and successfully deviates from, reduction box can drastically accelerate in the presence of input torque, therefore immediately enter step S6.
Whether the reduction box input shaft or the instant rotating speed of output shaft for S6) judging test car speed unit feedback are 0, if not 0
Then master controller sends to electric machine controller and removes equivalent ramp parking torque signal, makes reduction box input shaft or output rotating speed
It is reduced to 0；
S7) judge whether the P gears of shift sensor feedback put be back to initial position, if not being back to initial position,
Step S5 is then back to, if being back to initial position, shows that releasing P keeps off successfully, outputs test result.
Further, the master controller is provided with timing module, in step S2, if P gears are not suspended to position and time-out always,
Then show that hang P gears loses in fact, outputs test result；In step S7, if P gears are not back to initial position and time-out, surface always
Bright releasing P gears failure, outputs test result.
Beneficial effect：The present invention is equivalent to slope by providing one to the input shaft or output shaft of reduction box to motor
The output torque of road parking moment of torsion, and tested hill gradient can be changed by changing the output torque of motor so that
Whole test process can not have the acclive level land to carry out, and have a wide range of application, and simple structure, low cost.Also can be by repeatedly
Start motor to realize loop test, and then test the durability that P keeps off system, it is simple and convenient, can be widely applied to P gears system
The performance test of system and durable test, realize the self-control of testboard bay, and can be in the long duration test of enterprises do-it-yourself and performance
Test, saving external coordination experimentation cost and shortening R＆D cycle.Meanwhile, this test device can simulate the effect of vehicle ramp parking,
Can reduce expense and the cycle of actual road test, Project-developing early stage, this test device was more aggravated without in the case of instruction carriage
Will.
Method of testing of the invention can be automatically performed automobile P and keep off the simulation test of ramp parking, and can be automatically performed automobile
P gears under the limiting case not pulled the hand brake release simulation test, and test process is simplified, safe and reliable.
In addition to objects, features and advantages described above, the present invention also has other objects, features and advantages.
Below with reference to figure, the present invention is further detailed explanation.
Brief description of the drawings
The accompanying drawing for constituting the part of the application is used for providing a further understanding of the present invention, schematic reality of the invention
Apply example and its illustrate, for explaining the present invention, not constitute inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the P gear parking execution unit structure charts described in background of invention；
Fig. 2 is the test device Integral connection structure figure of the preferred embodiment of the present invention；
Fig. 3 is the general flow chart of the method for testing of the preferred embodiment of the present invention；
Fig. 4 is the flow detail drawing of the method for testing of the preferred embodiment of the present invention；
In Fig. 1：A- output shafts, b- parking gears, c- park pawls.
In Fig. 2~4：1- reduction boxes, 2- motors, 3- electric machine controllers, 4-P gear parking systems, 41-P gear parkings are held
Row part, 42-P gear drive devices, 43- shift sensors, 44-P gear control units, 5- master controllers, 51- host computers, 52- platforms
Frame control unit, 6-CAN buses, 7- inertial flywheels.
Specific embodiment
Embodiments of the invention are described in detail below in conjunction with accompanying drawing, but the present invention can be limited according to claim
Fixed and covering multitude of different ways is implemented.
Referring to Fig. 2 automobile P keep off system ramp parking simulating test device, including master controller 5, be provided with P gear stay
The driving electricity for providing reduction box equivalent ramp parking moment of torsion of reduction box 1 and the reduction box input shaft connection of car system 4
The motor control of machine 2 and the size and direction for the moment of torsion that controls motor 2 to provide reduction box of the connection of motor 2
Device processed 3；The P gear systems tested in the present embodiment are that electric automobile P keeps off system, and motor 2 is used is pacified with electric automobile
The motor identical motor of dress so that test result meets actual, more accurate, therefore, the present invention is more suitable for electronic vapour
Car.
P gear parking systems 4 include the P gear parkings execution unit 41 and P with the output shaft direct or indirect connection of reduction box 1
The connection of gear parking execution unit 41 for driving P to keep off the P gears drive device 42 of the action of parking execution unit 41, for detecting P
Whether gear parking execution unit 41 is suspended to the shift sensor 43 of position, and in the present embodiment, P gear drive devices 42 use motor, in P
Gear motor 42 is rotated to position of putting into gear, and is started motor 2 and is applied equivalent ramp moment of torsion to reduction box input shaft, is judged
Whether P gears put into gear successfully, and then complete ramp parking test；Rotated to offset position in P gear motors 42, extract P gears,
Judge that P gears pluck whether gear succeeds, if pluck keep off successfully if remove equivalent ramp moment of torsion, under the limiting case that completion ramp does not pull the hand brake
Test.P gear parking systems 4 also include P gear control units 44, and P gear drive devices 42 are kept off by P with shift sensor 43 and being controlled
The electrical connection control of unit processed 44, P gear control units 44 are used to start or stop P gear drive devices 42 and receive shift sensor
The position signalling of the P gear parkings execution unit 41 of 43 transmission；
Electric machine controller 3 includes the torsion of the instant torque applied to reduction box input shaft for output driving motor
Square feedback unit and the speed feedback unit for output driving motor and the instant rotating speed of reduction box input shaft；Instant moment of torsion with
Instant rotating speed can be calculated according to the instant electric current and/or magnitude of voltage provided motor by electric machine controller by calibration formula
Obtain.Because the instant moment of torsion of input shaft and rotating speed are obtained by the calibrated and calculated of electric machine controller, therefore surveyed without installing
The examination instant moment of torsion of input shaft and the torque sensor and velocity sensor of rotating speed, simplify structure.
Electric machine controller uses MCU (single-chip microcomputer) controller.
Electric machine controller 3 is connected by communication line with P gear control units 44 with master controller 5, receives P gear control units
Position signalling, the actual torsion of the input shaft of electric machine controller torsion-testing unit feedback of the P gear parking execution units of 44 feedbacks
Square and test car speed unit feedback reduction box input shaft tach signal and according to P keep off parking execution unit position signalling
And reduction box input shaft actual torque, tach signal and applying is sent to electric machine controller 3 or equivalent ramp parking is removed
The signal of moment of torsion and to P gear control unit 44 send hang P gear or pluck P gear signal.
Communication line uses CAN 6, and it is total that electric machine controller 3, P gear control unit 44 is equipped with CAN with master controller 5
Line interface, electric machine controller 3, P gear control unit 44 is electrically connected to form loop with master controller 5 by CAN.
In the present embodiment, master controller is provided with firing test switch and stopping examination for the process of manual Control experiment
Switch is tested, master controller is provided with the P position switch for the action of manual start and stop P gears.
In the present embodiment, motor occurs after the output shaft or input shaft of reduction box are connected with for preventing P gears from plucking gear
The inertial flywheel 7 of driving phenomenon.When plucking gear due to P gears, the moment of torsion that motor applies is to continue with what is kept, after P gears pluck gear,
The rotating speed of input shaft can quickly increase, and inertial flywheel can produce resistance through output shaft to input shaft, defeated after preventing P gears from plucking gear
Enter the too fast increase of rotating speed.
In the present embodiment, master controller includes host computer 51 and stand control unit 52, and host computer is used to realize test number
According to collection and stored record, the circular of trystate, the alarm of abnormality etc.；Also the selection of test process can be realized and is opened
Dynamic, closing；Stand control unit is provided with following functions as core control system：The calculating and simulation of ramp parking operating mode,
Control instruction, automatic cycle testing, system protection of the action of P gears etc..Test loop is selected by host computer, tester passes through
Manipulation controlling switch (firing test switch, stopping test switch, P position switch, manual mode switch, automatic mode switch etc.),
Start or stop test.
Referring to Fig. 3 and Fig. 4, the method for testing implementation process and step of the present embodiment are as follows：
S101 is walked：System electrification is initialized, stand control unit reading host computer arrange parameter, such as test loop,
Simulation ramp size, automobile parameter, automatic mode or manual mode etc.；
S102 is walked：Confirm whether initiation parameter completes, returning to step S101 if not completing reinitializes, such as
Fruit completes then to enter S103；
S103 is walked：It is standby.This state is not controlled operation, waits the input instruction of tester；
S104 is walked：It is confirmed whether firing test, if started, the S106 into S105 programs；If do not started,
Then return to S103.
S105 is walked：Ramp parking test program block, inside contains the control of multiple P gears lockings, ramp and simulates control, P gears
Release control etc.；When stopping TD and activating while starting (stop test switch), no matter during program operates in this program block
Which sub- state, this program block will be immediately exited from.
S106 is walked：Judge whether to meet and start parking condition.Main purpose is in order to avoid P gear locking failures or damages
The situation of bad parts occurs.In the case that such as motor has rotating speed or has moment of torsion, No starting parking.
S107 is walked：Hang P gear controls.P gears control of the invention, is produced by stand control unit according on electric automobile whole
The communication protocol of product sends hangs P gear instructions, is performed by P gear control unit control P gear drive devices and the P gear parkings of measurand
Part is performed.P gears control unit can put state of progress, P gears simultaneously, the information such as electric current of putting into gear is fed back to by CAN
Stand control unit.
S108 is walked：Stand control unit judges that P keeps off whether state of a control exceedes normally by built-in state counter
Time.
S109 is walked：Hang P gear failures.When extension P gear action time-out occur and being unfinished, that is, hang P and keep off failure, test is by eventually
Only.Need tester to analyze and hang P gear failure causes.
S110 is walked：Whether in place to confirm P gears.In the present embodiment, P gears control unit itself can also carry similar examining
Disconnected, the state and P that stand control unit can keep off control unit by P keep off whether in place position judgment P keeps off.
S111 is walked：Apply equivalent ramp parking moment of torsion.The direction of equivalent ramp moment of torsion and numerical value are in system initialization
When according to host computer be input into the simulation gradient be calculated automatically from automobile parameter.Stand control unit please by CAN
Seeking electric machine controller gradually increases driving torque, and the instant moment of torsion of the motor input shaft fed back to electric machine controller is equal to equivalent
Ramp parking moment of torsion, into next step.Because now having hung P gears, input shaft cannot rotate, and the moment of torsion of motor output can be by P
The parking gear and ratchet for keeping off parking system bear.
S112 is walked：Judge whether reduction box rotates after adding moment of torsion.Under normal circumstances, if successfully hung into P gears, and parking
Enough, the moment of torsion in reduction box input zone of reasonableness, reduction box can be locked by P gear systems, is not in rotation for the intensity of system
's.If there is rotation, then illustrate that P gears do not hang up properly, or after bearing moment of torsion, P gear thrashings.
S113 is walked：Judge that whether reduction box adds P gears after moment of torsion to put and stablizes.P gear system designs normal condition can be with certainly
Lock function, after parking system bears high torque, may react to P gears executing agency, cause to deviate from P gears automatically.
S114 is walked：Confirm whether the actual torque of input shaft has reached the equivalent ramp moment of torsion of setting.
S115 is walked：P is hung to keep off successfully.Program runs to this step, illustrates P gears system position in place, can bear enough
Big parking moment of torsion, and P gears put stabilization, reduction box succeed without spin it is locked, P gear function it is normal.
S116 is walked：Hang P gear failures.Because comprehensive acknowledged P gears are put, therefore extension P gear failure maximum possible here
It is after reduction box inside parking system damage occurs and causes parking function to fail, or P gear parking systems bear parking moment of torsion, instead
Active force causes executing agency to reset.These are all the situations that P gear systems do not allow to occur.
S117 is walked：Whether carry out releasing P gear tests.Whether carry out by tester's Initialize installation.Sometimes tester
Member starts releasing P gear tests using manual mode, it is not necessary to tested automatically into P gears are released.
S118 is walked：P gears pluck gear.In this step, the equivalent ramp that motor is maintained at the applying of reduction box input is turned round
Square, stand control unit is asked P gear control units to carry out P gears and plucks gear operation by CAN, and simulation ramp parking does not pull the hand brake
Extreme case.
S119 is walked：P gear control time-out judges.P gear control time-out judgements, are to ensure that certain hour interior energy releases P gears
, if overtime explanation system is problematic.
S120 is walked：P gears pluck gear failure.If P gears pluck gear failure, system will stop experiment carrying out accident analysis.
S121 is walked：Whether reduction box rotates judgement.If reduction box starts rotation, illustrate that P gear systems are actual
Pluck and keep off successfully.
S122 is walked：Remove equivalent ramp moment of torsion.Because S121 steps have had identified that reduction box starts rotation, remove and turn round
The faster the better for square needs, and not so motor can drastically accelerate.
S123 is walked：Judge whether in place P gears are put.Position signalling is kept off by P, is confirmed whether to reach the mesh that P gears pluck gear
Cursor position.P gears pluck the objectives position of gear, can be obtained by parameter calibration or initialization self study.
S124 is walked：P is released to keep off successfully.
S125 is walked：Terminate ramp parking test module.
S126 is walked：Terminate ramp parking test module.
S127 is walked：Judge whether to need retest.If Initialize installation is to be circulated durable test, need
It is set to retest.System can return to step S1 and start test.
S128 is walked：Finish test procedure.
The preferred embodiments of the present invention are the foregoing is only, is not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.It is all within the spirit and principles in the present invention, made any repair
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (7)
1. a kind of automobile P keeps off the ramp parking simulating test device of system, it is characterised in that including master controller (5), be provided with
Reduction box (1) and reduction box input shaft or the output shaft connection of P gears parking system (4) for providing equivalent slope to reduction box
Road parking moment of torsion motor (2) and motor (2) connection for controlling what motor (2) was provided reduction box
The size of moment of torsion and the electric machine controller (3) in direction；
The equivalent ramp parking torque T m slips by slope power more than or equal to automobile parking when ramp, i.e.,：
During motor connection reduction box input shaft,
During motor connection reduction gearbox output shaft, Tm≥Gsin(θ)R；
In formula, G is value of slope, the car that R is institute's simulation test of the vehicle gravity value of the car of institute's simulation test, θ for simulation test
Radius of wheel, i be reduction box resultant gear ratio；
The P keeps off parking system (4) and keeps off parking execution unit including the P with reduction box (1) output shaft direct or indirect connection
(41) and P keep off parking execution unit (41) connection for drive P keep off parking execution unit (41) action P keep off drive device
(42), keep off whether parking execution unit (41) is suspended to position or is retracted into the shift sensor (43) of initial position, institute for detecting P
State P gears parking system (4) and also include P gears control unit (44), the P keeps off drive device (42) with shift sensor (43)
By P keep off control unit (44) electrical connection control, P keep off control unit (44) for start or stop P keep off drive device (42) and
Receive the position signalling of P gears parking execution unit (41) of shift sensor (43) transmission；
The electric machine controller (3) includes the instant torsion applied to reduction box input shaft or output shaft for output driving motor
The torque feedback unit of square size and for output driving motor and reduction box input shaft or the speed of the instant rotating speed of output shaft
Feedback unit；
The electric machine controller (3) is kept off control unit (44) and is connected with master controller (5) by communication line with P, master controller
Receive position signalling, electric machine controller torque feedback unit feedback that P keeps off the P gear parking execution units of control unit (44) feedback
Input shaft or output shaft instant moment of torsion and speed feedback unit feedback reduction box input shaft or output shaft immediately turn
Fast signal simultaneously keeps off the position signalling of parking execution unit and instant moment of torsion, the rotating speed of reduction box input shaft or output shaft according to P
Signal and to electric machine controller (3) send apply or remove equivalent ramp parking moment of torsion signal and to P keep off control unit
(44) signal hung P gears or pluck P gears is sent.
2. a kind of automobile P according to claim 1 keeps off the ramp parking simulating test device of system, it is characterised in that institute
Communication line is stated using CAN (6), the electric machine controller (3), P keep off control unit (44) and be equipped with master controller (5)
CAN interface, electric machine controller (3), P are kept off control unit (44) and are electrically connected to form back by CAN with master controller (5)
Road.
3. a kind of automobile P according to claim 1 keeps off the ramp parking simulating test device of system, it is characterised in that institute
Master controller is stated to be provided with firing test switch for the process of manual Control experiment, stop test switch and for manual
The P position switch of start and stop P gears action.
4. a kind of automobile P according to any one in claims 1 to 3 keeps off the ramp parking simulating test device of system,
Characterized in that, after the output shaft or input shaft of the reduction box are connected with for preventing P gears from plucking gear there is driving in motor
The inertial flywheel (7) of phenomenon.
5. a kind of ramp parking simulating test device of the gears of the automobile P according to any one in Claims 1 to 4 system is set
Method of testing, it is characterised in that comprise the following steps：
S1 P gears are hung in) parking：When the reduction box input shaft rotating speed of speed feedback unit feedback is 0, master controller keeps off to P and controlling
Unit sends the signal for hanging P gears, and P gear control units start P gear drive devices, parking execution unit is acted and is put into gear；
S2 equivalent ramp parking moment of torsion) is applied：Judge whether the P gears of shift sensor feedback put be suspended to position, if P gears are not suspended to
Position, then be back to step S1, if P gears have been suspended to position, master controller sends to electric machine controller and applies equivalent ramp parking moment of torsion
Signal, electric machine controller start motor, the output torque of motor is increased to equal to equivalent ramp parking moment of torsion,
If not judging whether the reduction box input shaft or the instant rotating speed of output shaft of speed feedback unit feedback are 0,0 and show that P gears are hung
Gear failure, outputs test result, and next step is entered if rotating speed is 0；
S3) judge that the P gears of shift sensor feedback are put whether to stablize, if unstable rule shows that P gears are put into gear unsuccessfully, output test
As a result, next step is entered if stabilization；
S4) judge whether the input shaft or the instant moment of torsion of output shaft of torque feedback unit feedback are equal to equivalent ramp parking moment of torsion,
If being less than equivalent ramp parking moment of torsion, step S2 is back to, if being more than or equal to equivalent ramp parking moment of torsion, hangs P and keep off into
Work(, outputs test result.
6. automobile P keeps off the ramp parking analog detection method of system according to claim 5, it is characterised in that the automobile P
The ramp parking analog detection method of gear system also P gear put into gear successfully after be provided with releasing P keep off test process, specifically include with
Lower step：
S5) band moment of torsion plucks P gears：Master controller continues to keep to apply signal to the equivalent ramp parking moment of torsion of electric machine controller, together
When request P gear control unit pluck P gear, P gear control unit start P gear drive device, act parking execution unit and move back gear；
Whether the reduction box input shaft or the instant rotating speed of output shaft for S6) judging speed feedback unit feedback are 0, if not 0 master
Controller sends to electric machine controller and removes equivalent ramp parking torque signal, is reduced to reduction box input shaft or output rotating speed
0；
S7) judge whether the P gears of shift sensor feedback put be back to initial position, if not being back to initial position, return
Step S5 is back to, if being back to initial position, shows that releasing P keeps off successfully, outputs test result.
7. automobile P keeps off the ramp parking analog detection method of system according to claim 6, it is characterised in that the master control
Device processed is provided with timing module, in step S2, if P gears are not suspended to position and time-out always, shows that hang P gears loses in fact, output test
As a result；In step S7, if P gears are not back to initial position and time-out always, show to release P gear failures, output test result.
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| CN201710149849.9A CN106769106B (en) | 2017-03-14 | 2017-03-14 | Ramp parking simulation test device and test method for automobile P gear system |
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| CN201710149849.9A CN106769106B (en) | 2017-03-14 | 2017-03-14 | Ramp parking simulation test device and test method for automobile P gear system |
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| CN113609710A (en) * | 2021-09-09 | 2021-11-05 | 安徽江淮汽车集团股份有限公司 | Power simulation method, power chassis simulation system and vehicle body area test system |
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| CN113820127A (en) * | 2021-09-22 | 2021-12-21 | 哈尔滨东安汽车发动机制造有限公司 | Method for testing reliability of parking mechanism of automatic transmission |
| CN113759878A (en) * | 2021-09-26 | 2021-12-07 | 重庆美沣秦安汽车驱动系统有限公司 | Control system, method and terminal for combined action of P-gear actuator and motor |
| CN113759878B (en) * | 2021-09-26 | 2023-08-29 | 重庆美沣秦安汽车驱动系统有限公司 | Control system, method and terminal for joint action of P-gear actuator and motor |
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