CN1651895A - Automobile ABS / ASR apparatus experiment table based on brake inertia test - Google Patents
Automobile ABS / ASR apparatus experiment table based on brake inertia test Download PDFInfo
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- CN1651895A CN1651895A CN 200410046010 CN200410046010A CN1651895A CN 1651895 A CN1651895 A CN 1651895A CN 200410046010 CN200410046010 CN 200410046010 CN 200410046010 A CN200410046010 A CN 200410046010A CN 1651895 A CN1651895 A CN 1651895A
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Abstract
The present invention relates to an automobile ABS/ASR equipment experimental table based on brake inertia test. It includes the following main components: main drive motor and its control mechanism, main shaft, inertia flywheel and hitching mechanism, slide table, transmission gearbox, transmission shaft and universal joint, drum and its guideway, positive pressure loading device between tested wheel and drum and its pressure regulating mechanism, sideway force loading device between tested wheel and drum and its pressure regulating mechanism, ASR drive motor and its control mechanism, ASR power transmission mechanism, wheel cylinder brake pressure switching mechanism, speed and force sensing device, hydraulic pump station, data recording/processing/displaying/printing device and others.
Description
Affiliated technical field
The present invention relates to automobile ABS/ASR device experiment table, especially a kind of automobile ABS/ASR device experiment table (being called for short the ABS/ASR experiment table) based on the detent inertia test.Automobile ABS (Anti-lock Braking System) device is meant the automotive anti-lock braking device, automobile ASR (Automatic Slip Regulation) device is meant that automobile drives slippage prevention device, and automobile ABS/ASR device is meant that automobile possesses the device of braking anti-lock function and driving antiskid function simultaneously.
Background technology
At present, domestic and international existing automotive brake inertia experiment table manufacturer is more famous U.S. Link company and a Greening company, German Schenck company, non-ore deposit technical equipment research institute of Jilin University.Automotive brake inertia experiment table is used for the Performance Detection and the research of automotive brake product, can carry out all traditional performance tests of automotive brake.
At present, the technology status of ABS/ASR experiment table is zero both at home and abroad.
Summary of the invention
On the basis of automotive brake inertia experiment table, by repacking, increase ABS/ASR performance test function, form ABS/ASR device experiment table based on the automotive brake inertia test.It is by main drive motor and control gear thereof, main shaft, one group of inertial flywheel and hanging mechanisms thereof, slide unit and position-limit mechanism thereof, transmission case, transmission shaft and universal joint, cylinder and moving guide rail thereof, normal pressure charger and pressure servo governor motion between tested wheel and the cylinder, side force charger and pressure servo governor motion between tested wheel and the cylinder, ASR drive motor and control gear thereof, the ASR power drive mechanism, wheel cylinder brake pressure switching mechanism, rate signal and force signal sensing device, hydraulic power unit, temperature control equipment, emergency braking apparatus, switch board, data recording/processing/demonstration/printing equipment, frame and protective cover are formed.The ABS/ASR experiment table can carry out the traditional performance test of ABS performance test, ASR performance test, detent, is the multifunction test device of brake system of car.
The technical solution adopted for the present invention to solve the technical problems is:
1) the ABS/ASR experiment table is contained in tested wheel and detent thereof on the slide unit for realizing ABS performance test function.The main drive motor of ABS/ASR experiment table drives main shaft and rotates, and draws power from main shaft, successively reaches transmission case, universal joint and drive shaft, drives cylinder and rotates, the wheel of drum driven on it.Main shaft drives the inertial flywheel rotation of simulation wheel normal load simultaneously in addition.Reach the preset vehicle speed of ABS performance test when drum rotation speed after, main motor power down on the main shaft, abs controller is implemented the pressure of braking supercharging, braking decompression or service lap and is regulated according to the steering logic of ABS to tested wheel simultaneously, realizes the ABS control brake of wheel.Friction force between wheel and the cylinder is slowed down cylinder and is rotated, the situation of change of the speed of a motor vehicle in the simulated automotive braking procedure, the wheel speed situation of change of tested wheel is determined by braking moment and the moment acting in conjunction that turns a wheel that friction force produced between wheel and the cylinder that wheel decelerates is rotated that wheel drag produced.Be installed in the directly real-time tach signal of measuring wheel of speed probe on the tested wheel, be installed in the directly real-time tach signal of measuring cylinder of speed probe on the main shaft, be vehicle speed signal.Tach signal and vehicle speed signal reach the electronic-controlled installation (ABSECU) of ABS, are used for calculating in real time the angular deceleration/angular acceleration of tested wheel and the slip rate of wheel.The cylinder that drive wheels is rotated can move up and down along guide rail, is used for regulating the normal pressure between cylinder and wheel.The size of this normal pressure is by force sensor measuring.After normal pressure pre-sets, automatically regulate the oil pressure of oil cylinder by the Hydrauservo System of the two-way cylinder that cylinder is moved up and down, until making the normal pressure between cylinder and wheel be stabilized in the value of setting in advance, realize the simulation of the different adhesion properties that different road surface produces, be used to test the control performance of ABS on different road surfaces.Be installed in and make slide unit in another two-way cylinder of slide unit end, make to produce side force between cylinder and wheel along the moving axially of main shaft.The size that produces side force is by force sensor measuring, after the size of this side force pre-sets, Hydrauservo System by this two-way cylinder is regulated automatically, until making the side force between cylinder and wheel be stabilized in the value of setting in advance, is used for the control performance test of ABS under steering state.
2) the ABS/ASR experiment table has two kinds of ASR performance test modes for realizing ASR performance test function.First kind of test method is: tested wheel and detent thereof are contained on the slide unit, main drive motor starts, main drive motor drives transmission case, transmission shaft and universal joint, cylinder rotation with certain rotating speed under the adjusting of its control gear, main shaft drives the inertial flywheel rotation of simulation wheel normal load simultaneously in addition.The ASR drive motor starts simultaneously, draws power from the ASR drive motor, drives tested wheel through the ASR power drive mechanism.Normal pressure makes it be stabilized in the value of setting in advance between adjusting wheel and cylinder.The rotating speed of control main drive motor and ASR drive motor makes drum rotation speed low, and vehicle wheel rotational speed height, wheel rotate with certain slippage rate on cylinder.Reach the preset vehicle speed of ASR performance test when tested vehicle wheel rotational speed after, regulate the rotating speed output of ASR drive motor, in order to the driving force of test wheel under different slippage rate situations.Second kind of test method is: tested wheel and detent thereof are installed on the slide unit, main drive motor does not start, and the ASR drive motor starts, and draws power from the ASR drive motor, drive tested wheel through the ASR power drive mechanism, wheel drives cylinder and rotates.The inertial flywheel that cylinder drives transmission shaft and universal joint, transmission case and simulation wheel normal load rotates.Because normal pressure is little between wheel and cylinder, the driving force that is produced is little, and drum rotation speed is low, and vehicle wheel rotational speed height, wheel rotate with certain slippage rate on cylinder.Reach the preset vehicle speed of ASR performance test when vehicle wheel rotational speed after, the ASR controller is regulated the pressure of tested wheel enforcement braking supercharging, braking decompression or service lap according to the steering logic of ASR, realizes that the control of the ASR damping force adjusting of tested wheel is rotated.The torque sensor that is installed on the rotation axis in the slide unit is directly measured the driving force signal in real time, be installed in the directly real-time tach signal of measuring wheel of speed probe on the tested wheel, be installed in the directly real-time tach signal of measuring cylinder of speed probe on the main shaft, be vehicle speed signal.Tach signal and vehicle speed signal reach the electronic-controlled installation (ASR ECU) of ASR, are used for calculating in real time the angular deceleration/angular acceleration of tested wheel and the slippage rate of wheel.Cylinder can move up and down along guide rail, is used for regulating the normal pressure between cylinder and wheel, and the size of this normal pressure is by force sensor measuring.After normal pressure pre-sets, automatically regulate the oil pressure of oil cylinder by the Hydrauservo System of the two-way cylinder that cylinder is moved up and down, until making the normal pressure between cylinder and wheel be stabilized in the value of setting in advance, realize the simulation of the different adhesion properties that different road surface produces, be used to test control performance or the adhesion property of ASR on different road surfaces.Be installed in and make slide unit in another two-way cylinder of slide unit end, make to produce side force between cylinder and wheel along the moving axially of main shaft.The size that produces side force is by force sensor measuring, after the size of this side force pre-sets, Hydrauservo System by this two-way cylinder is regulated automatically, until making the side force between cylinder and wheel be stabilized in the value of setting in advance, be used for control performance or the adhesion property test of ASR under steering state.
3) when the traditional performance test of carrying out vehicle brake, only the vehicle brake assembly is contained on the slide unit of experiment table, brake assembly and cylinder disengage, and transmission case is in neutral position, cut off the power between experiment table main shaft and the cylinder like this, cylinder no longer rotates.Main drive motor only drive shaft and the rotating part that drives brake assembly rotates.The moment of inertia of the inertial flywheel that the size adjustment of the normal load of bearing according to the wheel of using this detent is rotated with main shaft is used for simulating the normal load that wheel is born.During test, after the rotating part of main shaft drive brake assembly rotates the rotating speed that reaches predetermined, tested detent is applied constant pressure or the braking of permanent moment of torsion, detect every traditional performance of detent.
Feature based on the automobile ABS/ASR experiment table of detent inertia test is: whole ABS experiment table is laid on the ground, and tested wheel or brake assembly mounting or dismounting position make things convenient for laboratory technician's operation; Experiment table has the one-piece steel frame, is made by the high torsional resistance steel, and removes internal stress by advanced Technology for Heating Processing, and the frame upper surface is that drive motor is installed, transmission case, and main shaft, the basal plane of flywheel system bearing and slide unit, unification is located by keyway; Main drive motor and ASR drive motor are direct current motor, adopt the DC speed regulation mode, are suitable for the test of ABS/ASR performance test and detent traditional performance; The I axle of transmission case is a power input shaft, it is the part of ABS/ASR experiment table main shaft, the II axle is an intermediate shaft, it is passing to the III axle from the power of I axle, the III axle is a power output shaft, through torque sensor, universal joint and drive shaft connects with cylinder, the ratio of gear of transmission case is 1: 1, gear on the II axle can move axially, the joint of realizing III axle and I axle with separate, this clutch action pushes away/draws realization by an oil cylinder, when being used for ABS or ASR performance test, the III axle of transmission case engages with the power of I axle, and the III axle separates with the power of I axle when being used for the test of detent traditional performance; Inertial flywheel system is made up of 10 flywheels, be divided into two groups by geometric ratio and equal difference, one group of the geometric ratio distribution is little mass flywheel, adopt flange and Bolt Connection, support is fixed, and one group of the equal difference distribution is big mass flywheel, adopts conical surface location, by flywheel outer bolt, effectively shortened axial length; Slide unit can move axially and locking in position; When being used for ABS or ASR performance test, slide unit can move axially to realize axial loading in pushing away/leaving behind of a servo-cylinder, axial load can be by set point adjustment, slide unit rotation axis end is a removable connector, axletree when being used for fixing the tumbler of detent or ABS/ASR test has caliper/back-plate fixed mechanism on the slide unit; Idler is on two rolling bearings, bearing seat is fixed on the rigid carriers, carriage is installed on the rolling guide, but promotion bottom bracket VTOL (vertical take off and landing) at a servo-cylinder, make between cylinder and the tested wheel and produce normal pressure, but this normal pressure FEEDBACK CONTROL, idler bearing and rolling guide can also bear the cylinder axial thrust; The ASR driven pulley is bearing in the end of main shaft by rolling bearing, makes the rotation mutually noninterfere of ASR driven pulley and main shaft; Accident brake is installed on the main shaft of ABS/ASR experiment table, and except that emergency braking function, its brake pressure is adjustable, can realize the adjusting of cylinder rotational resistance torque; On the pipeline that pressure of wheel cylinder is supplied with, has an X-over, when carrying out second kind of performance test mode of ABS performance test or ASR, pressure oil process abs pressure regulator or ASR pressure governor to the wheel cylinder fuel feeding of tested wheel, are realized the adjusting of wheel-braking cylinder pressure again; When carrying out first kind of performance test mode of ASR, the ASR drive motor is by its rotating speed output of its control gear scalable; Carry out detent traditional performance when test, pressure oil without abs pressure regulator or ASR pressure governor directly to the wheel-braking cylinder fuel feeding; Hydraulic power unit places main drive motor below, for the action of each oil cylinder provides power; The sensor that the ABS/ASR experiment table possesses has: be used to test the force transducer of brake braking force square, be installed on the rotation axis in the slide unit; Be used to test the torque sensor of cylinder moment, be installed on the transmission shaft between transmission case and the cylinder; The speed probe that is used for the test carriage wheel speed is installed on the slide unit rotation axis; Be used to test the speed pickup of main shaft and drum rotation speed, be installed on the main shaft; The force transducer that is used for the testing tire side force is installed in the inner end that makes the axially movable servo-cylinder of slide unit; Be used to test the force transducer of normal pressure between cylinder and wheel, be installed in the below of idler carriage; Be used to test the pressure transducer of detent brake-pipe pressure, be installed in the brake piping of detent; Be used to test the pressure transducer of main shaft accident brake brake-pipe pressure, be installed in the brake piping of main shaft accident brake; Be used to test 4 temperature sensors of brake temperature, wherein 2 temperature sensors are installed on the fixture of detent, and other 2 temperature sensors are installed on the tumbler of detent, by being installed in the collector ring output on the main shaft; Computer automatic control system has adopted multitask, multi-user's VME real-time control computer and the PC of Windows NT, the test reliability and the real-time of height have been guaranteed, make the user have friendly Windows operation interface, have diagnosis, analysis and the Presentation Function from normal moveout correction and demarcation, most common failure of the control of ABS performance test, the control of ASR performance test, detent traditional performance test control, experiment table each several part.
The invention has the beneficial effects as follows:
A kind of novel ABS/ASR device experiment table based on the automotive brake inertia test is provided, can carry out the various traditional performance tests of automotive brake, can carry out the performance test of automotive anti-lock braking device (ABS) and the performance test of driving slippage prevention device (ASR) again, to adapt to the extensively needs of the performance test of the ABS/ASR device of installation of Hyundai Motor; For existing automotive brake inertia experiment table, can transform by simple, can increase the ABS/ASR test function, reach the potentiality that make full use of existing automotive brake inertia experiment table, improve the utilization factor of existing automotive brake inertia experiment table, adapt to the requirement of Hyundai Motor clamping device test.
Can carry out automobile ASR performance test project has:
(1) can carry out the performance test of ASR on the straight way road surface of various low adhesion properties, like rain road surface pavement, loose snow road surface, compacting snow road surface, the ice road surface is melted on the dry ice road surface;
(2) can carry out the performance test of ASR on the curved road surface of various low adhesion properties, like rain road surface pavement, loose snow road surface, compacting snow road surface, the ice road surface is melted on the dry ice road surface;
(3) can carry out ASR performance test under the low speed of a motor vehicle state in difference;
(4) can carry out the performance test of ASR under different normal load states, as zero load, semi-load, fully loaded;
(5) can carry out the performance test of ASR under the tire of the different degrees of wear, as new tire, half new tire, old tire;
(6) can carry out the performance test of ASR under driver's different operation modes, as big aperture throttle, medium aperture throttle, little aperture throttle;
(7) can carry out the performance test of ASR under different ramps, as different uphill gradients, different downward grades;
(8) can carry out ASR on various road surfaces, different kinds of roads trend, the various gradients, various speed, various load, the test of the various combination of various drive patterns;
(9) can carry out automobile when straight way travels, various adhering to drives adhesion property-slippage rate relation test on the road surface;
(10) can carry out automobile when travelling on different bends, various adhering to drives adhesion property-slippage rate relation test on the road surface.
Can carry out the performance of ABS pilot project has:
(1) can carry out the performance test of ABS on the straight way road surface of various adhesion properties, as dry cement road surface, dried bituminous pavement, rain road surface pavement, wetlaid road surface, loose snow road surface, compacting snow road surface, the ice road surface is melted, macadam pavement in the dry ice road surface;
(2) can carry out the performance test of ABS on the curved road surface of various adhesion properties, as the dry cement road surface, dried bituminous pavement, the rain road surface pavement, the wetlaid road surface, loose snow road surface, compacting snow road surface, the ice road surface is melted, macadam pavement in the dry ice road surface;
(3) can carry out the performance test of ABS under different speed of a motor vehicle states, as the low speed of a motor vehicle, the medium speed of a motor vehicle, the high speed of a motor vehicle;
(4) can carry out the performance test of ABS under different normal load states, as zero load, semi-load, fully loaded;
(5) can carry out the performance test of ABS under the tire of the different degrees of wear, as new tire, half new tire, old tire;
(6) can carry out the performance test of ABS under driver's different operation modes, brake as high strength, the medium tenacity braking, low-intensity braking, clutch coupling are in conjunction with braking, and clutch coupling is braking separately, slowly braking after elder generation's brake hard, braking back brake hard earlier slowly, earlier slowly after braking, of short duration the loosening the brake again slowly/brake hard, after first brake hard, of short duration the loosening the brake again slowly/brake hard;
(7) can carry out the performance test of ABS under different ramps, as different uphill gradients, different downward grades;
(8) can carry out ABS in the performance test of butt joint on the road surface, adhere to-hang down as height and adhere to the road surface, low adhering to-height adheres to the road surface, and height adheres to-hang down and adhere to-height adheres to the road surface, hang down to adhere to-height adheres to-hangs down and adhere to the road surface;
(9) can carry out ABS on various road surfaces, different kinds of roads trend, the various gradients, various speed, various load, the various combination test of various braking modes.
(10) can carry out automobile when straight way travels, various adhering to braked adhesion property-slip rate relation test on the road surface;
(11) can carry out automobile when travelling on different bends, various adhering to braked adhesion property-slip rate relation test on the road surface.
The traditional performance pilot project that can carry out vehicle brake has:
(1) has detent constant force square (permanent output) test function;
(2) has detent constant pressure (permanent input) test function;
(3) has the detent performance test function of dawdling;
(4) has statical moment (containing hand braking) test function;
(5) lag performance (Brake Hysteresis) that can carry out detent is tested;
(6) the pressure initiation performance (Threshold Pressure) that can carry out detent is tested;
(7) the relief pressure performance (Release Pressure) that can carry out detent is tested;
(8) the gradual pressure performance (Asymptotic Pressure) that can carry out detent is tested;
(9) the residual performance of braking moment (Brake Drag) that can carry out detent is tested;
(10) the bright film properties of friction facing (Lining Glazing) that can carry out detent is tested;
(11) the heat fading performance (Heat Fade) that can carry out detent is tested;
(12) the water fade performance (Water Fade) that can carry out detent is tested;
(13) restorability (Recovery) that can carry out detent is tested;
(14) the cold braking sickness performance (Cold Brake Sickness) that can carry out detent is tested;
(15) application factor (Brake Factor) that can carry out detent is tested;
(16) the chatter performance (Brake Chatter) that can carry out detent is tested;
(17) can carry out detent brake oil (Brake Noise) test;
(18) can carry out China, Europe, the U.S., Japanese car detent test standard.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
ABS/ASR experiment table master TV structure figure when Fig. 1 is the ASR performance test.
ABS/ASR experiment table plan structure figure when Fig. 2 is the ASR performance test.
ABS/ASR experiment table side-looking structural drawing when Fig. 3 is ASR performance test, ABS performance test and the test of detent traditional performance.
ABS/ASR experiment table master TV structure figure when Fig. 4 is the ABS performance test.
ABS/ASR experiment table plan structure figure when Fig. 5 is the ABS performance test.
ABS/ASR experiment table master TV structure figure when Fig. 6 tests for brake performance.
ABS/ASR experiment table plan structure figure when Fig. 7 tests for brake performance.
1. frames among the figure, 2. main drive motor, 3. hood, 4. speed of mainshaft sensor, 5. emergency braking mechanism, 6. transmission case, 7. main shaft, 8. statical moment calibrating device, 9. flywheel group hanging mechanisms, 10. flywheel group, 11. tested wheels, 12. tested wheel fixed supports, 13. wheel speed sensor, 14. slide units, 15. cooling channel mechanisms, 16. wheel torque sensor, 17. servo-cylinders, 18. lateral force sensors, 19. cylinder, 20. guide rails, 21. pressure sensors, 22. servo-cylinder, 23. wheel shaft couplings, 24.ASR driven pulley, 25.ASR driving belt, 26. universal joints, 27. transmission shafts, 28. cardan-shaft suspension mechanism, 29. cylinder torque sensors, 30. transmission case gear shifting handles, 31. hydraulic power unit, 32.ASR drive motor support, 33.ASR drive motor, 34. support, 35. tested detents, 36. detent pitman shafts.
Embodiment
In Fig. 1～Fig. 7, carrying out the ASR performance test, before ABS performance test or the test of detent traditional performance, by statical moment calibrating device (8) wheel torque sensor (16) and cylinder torque sensor (29) are carried out the moment demarcation earlier, by external rated rotational frequency meter speed of mainshaft sensor (4) and wheel speed sensor (13) are carried out the rotating speed demarcation, by external standard pressure transducer side direction force transducer (18) and pressure sensor (21) are carried out pressure calibration, after each transducer calibration is calibrated, can carry out the performance of ABS test, ASR performance test or the test of detent traditional performance.
In Fig. 1, Fig. 2 and Fig. 3, when carrying out the ASR performance test with first kind of test method, promote transmission case gear shifting handle (30) by transmission case clutch oil cylinder and make the slide gear of the II axle of transmission case (6) be in binding site, make and pass to III axle (output shaft) from the kinetic force of transmission case I axle (input shaft); Oil pressure by servo-cylinder (22) makes cylinder (19) move upward along its guide rail (20), until contacting with tested wheel (11), make cylinder (19) and tested wheel (11) keep predefined normal pressure by the oil pressure of regulating servo-cylinder (22), the value of normal pressure reaches main control computer by pressure sensor (21); Moving axially slide unit (14) to appropriate location makes tested wheel (11) can properly be installed on the tested wheel fixed support (12), the side force of regulating tested wheel (11) by servo-cylinder (17), keep predefined value until this side force, the value of side force reaches main control computer by lateral force sensors (18); The size of the normal load of being born according to tested wheel (11), regulate the flywheel group (10) of rotating by flywheel group hanging mechanisms (9), make that the moment of inertia of the flywheel group (10) of rotating with main shaft (7) and normal load that tested wheel (11) is born are suitable with main shaft (7).
After the preliminary work of above-mentioned first kind of ASR performance test mode is finished, start main drive motor (2), main drive motor (2) drive main shaft (7) under the adjusting of its control gear and be installed in the speed of mainshaft sensor (4) on the main shaft (7), the tumbler and the flywheel group (10) of emergency braking mechanism (5) rotated together, the inner shaft system, cylinder torque sensor (29), universal joint (26), transmission shaft (27) and the cylinder (19) that drive transmission case (6) simultaneously rotate together; Start ASR drive motor (33) simultaneously, the power of ASR drive motor (33) drives tested wheel (11) through ASR driving belt (25), ASR driven pulley (24) and wheel shaft coupling (23) and rotates; The rotating speed of control main drive motor (4) and ASR drive motor (33) makes the rotating speed height of low, the tested wheel of rotating speed (11) of cylinder (19), wheel on cylinder with certain slippage rate rotation; Main control computer is gathered the signal (vehicle speed signal) of speed of mainshaft sensor (4) and the signal (wheel speed signal) of wheel speed sensor (13) in real time, according to the vehicle speed signal and the wheel speed signal of real-time collection, calculates the slip rate of wheel in real time; By regulating the size of normal pressure between tested wheel (11) and the cylinder (19), can simulate the corresponding relation test that realizes attachment coefficient and slippage rate under the different pavement conditions.
Cooling channel mechanism (15) is used for the ventilation and heat of tested wheel (11).
In case the ABS/ASR experiment table fortuitous event occurs in ASR performance test process when needing brake hard, start emergency braking mechanism (5), main shaft (7) is promptly stopped operating, the required pressure oil of emergency braking mechanism (5) is provided by hydraulic power unit (31).
In Fig. 1, Fig. 2 and Fig. 3, when carrying out the ASR performance test with second kind of test method, promote transmission case gear shifting handle (30) by transmission case clutch oil cylinder and make the slide gear of the II axle of transmission case (6) be in binding site, make and pass to III axle (output shaft) from the kinetic force of transmission case I axle (input shaft); Oil pressure by servo-cylinder (22) makes cylinder (19) move upward along its guide rail (20), until contacting with tested wheel (11), make cylinder (19) and tested wheel (11) keep predefined normal pressure by the oil pressure of regulating servo-cylinder (22), the value of normal pressure reaches main control computer by pressure sensor (21); Moving axially slide unit (14) to appropriate location makes tested wheel (11) can properly be installed on the tested wheel fixed support (12), the side force of regulating tested wheel (11) by servo-cylinder (17), keep predefined value until this side force, the value of side force reaches main control computer by lateral force sensors (18); The size of the normal load of being born according to tested wheel (11), regulate the flywheel group (10) of rotating by flywheel group hanging mechanisms (9), make that the moment of inertia of the flywheel group (10) of rotating with main shaft (7) and normal load that tested wheel (11) is born are suitable with main shaft (7).
After the preliminary work of above-mentioned second kind of ASR performance test mode is finished, do not start main drive motor (2), only start ASR drive motor (33), the power of ASR drive motor (33) drives tested wheel (11) through ASR driving belt (25), ASR driven pulley (24) and wheel shaft coupling (23) and rotates, and tested wheel (11) drives cylinder (19) and rotates; Cylinder (19) drives the axle system of transmission shaft (27), universal joint (26), transmission case (6) and the inertial flywheel (10) of simulation wheel normal load rotates; Because normal pressure is little between tested wheel (11) and cylinder (19), the driving force that is produced is little, makes that cylinder (19) rotating speed is low, and tested wheel (11) rotating speed height, tested wheel (11) are gone up with certain slippage rate at cylinder (19) and rotated; After the rotating speed of tested wheel (11) reaches the preset vehicle speed of ASR performance test, the ASR controller is according to the steering logic of ASR, pressure to tested wheel enforcement braking supercharging, braking decompression or service lap is regulated, and realizes that the control of the ASR damping force adjusting of tested wheel (11) is rotated; Main control computer is gathered the signal (vehicle speed signal) of speed of mainshaft sensor (4), the signal (wheel speed signal) of wheel speed sensor (13) and the driving force signal of slide unit rotation axis in real time, vehicle speed signal and wheel speed signal according to real-time collection, calculate the slippage rate of wheel in real time, by the slippage rate and the driving force of real-time calculating and detection, the control effect of check ASR.
Cooling channel mechanism (15) is used for the ventilation and heat of tested wheel (11) and detent thereof.
In case the ABS/ASR experiment table fortuitous event occurs in ASR performance test process when needing brake hard, start emergency braking mechanism (5), main shaft (7) is promptly stopped operating, the required pressure oil of emergency braking mechanism (5) is provided by hydraulic power unit (31).
In Fig. 4, Fig. 5 and Fig. 3, when carrying out the ABS performance test, promote transmission case gear shifting handle (30) by transmission case clutch oil cylinder and make the slide gear of the II axle of transmission case (6) be in binding site, make and pass to III axle (output shaft) from the kinetic force of transmission case I axle (input shaft); Oil pressure by servo-cylinder (22) makes cylinder (19) move upward along its guide rail (20), until contacting with tested wheel (11), make cylinder (19) and tested wheel (11) keep predefined normal pressure by the oil pressure of regulating servo-cylinder (22), the value of normal pressure reaches main control computer by pressure sensor (21); Moving axially slide unit (14) to appropriate location makes tested wheel (11) can properly be installed on the tested wheel fixed support (12), the side force of regulating tested wheel (11) by servo-cylinder (17), keep predefined value until this side force, the value of side force reaches main control computer by lateral force sensors (18); The size of the normal load of being born according to tested wheel (11), regulate the flywheel group (10) of rotating by flywheel group hanging mechanisms (9), make that the moment of inertia of the flywheel group (10) of rotating with main shaft (7) and normal load that tested wheel (11) is born are suitable with main shaft (7).
After the preliminary work of above-mentioned ABS performance test is finished, start main drive motor (2), main drive motor (2) drive main shaft (7) and be installed in the speed of mainshaft sensor (4) on the main shaft (7), the tumbler and the flywheel group (10) of emergency braking mechanism (5) rotated together, the inner shaft system, cylinder torque sensor (29), universal joint (26), transmission shaft (27) and the cylinder (19) that drive transmission case (6) simultaneously rotate together; Cylinder (19) drives tested wheel (11) and rotates, after the speed of a motor vehicle of speed of mainshaft sensor (4) indication reaches the test speed of a motor vehicle, close main drive motor (2), simultaneously tested wheel (11) is applied abs braking, produced friction force between cylinder (19) and the tested wheel (11) like this; The friction force that acts on the tested wheel (11) has produced the moment that tested wheel (11) is rotated, and it interacts with the rotational resistance torque that applies the abs braking generation, makes wheel rotate with certain angular deceleration/angular acceleration; The friction force that acts on the cylinder (19) has produced the moment of resistance that cylinder (19) is rotated, and makes cylinder (19) and coupled flywheel group (10) do the rotation of slowing down together; Main control computer is gathered the signal (vehicle speed signal) of speed of mainshaft sensor (4) and the signal (wheel speed signal) of wheel speed sensor (13) in real time, vehicle speed signal and wheel speed signal according to real-time collection, calculate the slip rate of wheel and the angular deceleration/angular acceleration of wheel in real time, thereby the motion state of control wheel, the control effect of check ABS.
The required pressure oil of abs braking is provided by hydraulic power unit (31).
Cooling channel mechanism (15) is used for the ventilation and heat of tested wheel (11) and detent thereof.
In case the ABS/ASR experiment table fortuitous event occurs in ABS performance test process when needing brake hard, start emergency braking mechanism (5), main shaft (7) is promptly stopped operating, the required pressure oil of emergency braking mechanism (5) is provided by hydraulic power unit (31).
In Fig. 6, Fig. 7 and Fig. 3, when carrying out the test of automotive brake traditional performance, promoting transmission case gear shifting handle (30) by transmission case clutch oil cylinder makes the slide gear of the II axle of transmission case (6) be in the separation point position, make and can not pass to III axle (output shaft) from the power of transmission case I axle (input shaft), the inner shaft of transmission case (6) system, cylinder torque sensor (29), universal joint (26), transmission shaft (27) and cylinder (19) no longer rotate like this; Install tested detent (35) by tested wheel fixed support (12); By detent pitman shaft (36) main shaft (7) and tested detent (35) are linked together, main shaft (7) can drive tested detent (35) and rotates together like this; The size of the normal load of bearing according to the applied wheel of tested detent (35), regulate the flywheel group (10) of rotating by flywheel group hanging mechanisms (9), make that the moment of inertia of the flywheel group (10) of rotating with main shaft (7) and normal load that the applied wheel of tested detent (35) is born are suitable with main shaft (7).
After the preliminary work of above-mentioned automotive brake traditional performance test is finished, start main drive motor (2), the tumbler that main drive motor (2) drives main shaft (7) and is installed in tumbler, flywheel group (10), detent pitman shaft (36) and the tested detent (35) of speed of mainshaft sensor (4) on the main shaft (7), emergency braking mechanism (5) rotates together; Carrying out detent constant force square (permanent output), detent constant pressure (permanent input), during the test of item such as detent statical moment (containing hand braking), after the speed of a motor vehicle of speed of mainshaft sensor (4) indication reaches the test speed of a motor vehicle, close main drive motor (2), simultaneously tested detent (35) is applied correspondingly braking, can carry out the lag performance of detent, the pressure initiation performance, the relief pressure performance, the gradual pressure performance, the residual performance of braking moment, the bright film properties of friction facing, the heat fading performance, the water fade performance, hot restorability, the water restorability, the cold braking sickness performance, the chatter performance, the application factor test of brake oil and detent.
Carrying out the dawdling during performance test of detent, after the speed of a motor vehicle of speed of mainshaft sensor (4) indication reaches the test speed of a motor vehicle, tested detent (35) is applied constant force square or constant pressure, the tumbler that main drive motor (2) drives tested detent (35) rotates under on-position, realizes the performance test of dawdling of detent.
Main control computer is gathered the tach signal of speed of mainshaft sensor (4) and the torque signal of wheel torque sensor (16) in real time.
The required pressure oil of detent traditional performance test is provided by hydraulic power unit (31).
Cooling channel mechanism (15) is used for the ventilation and heat of tested detent (35).
In case the ABS/ASR experiment table fortuitous event occurs in detent traditional performance process of the test when needing brake hard, start emergency braking mechanism (5), main shaft (7) is promptly stopped operating, and the required pressure oil of emergency braking mechanism (5) is provided by hydraulic power unit (31).
Claims (10)
1. the automobile ABS based on the detent inertia test/ASR device experiment table (being called for short the ABS/ASR experiment table), comprise main drive motor and control gear thereof, main shaft, one group of inertial flywheel and hanging mechanisms thereof, slide unit and position-limit mechanism thereof, transmission case, transmission shaft and universal joint, cylinder and moving guide rail thereof, normal pressure charger and pressure servo governor motion between tested wheel and the cylinder, side force charger and pressure servo governor motion between tested wheel and the cylinder, ASR drive motor and control gear thereof, the ASR power drive mechanism, wheel cylinder brake pressure switching mechanism, rate signal and force signal sensing device, hydraulic power unit, pressure adjustment assembly, temperature control equipment, emergency braking apparatus, switch board, data recording/processing/demonstration/printing equipment, frame and protective cover is characterized in that: whole ABS/ASR experiment table is laid on the ground; Experiment table has the one-piece steel frame, is made by the high torsional resistance steel; The frame upper surface is that main drive motor is installed, transmission case, and main shaft, the basal plane of flywheel system and bearing seat thereof and slide unit, unification is located by keyway; The ASR drive motor is installed in the side of frame; Main drive motor and ASR drive motor are direct current motor, adopt the DC speed regulation mode; Inertial flywheel system is made up of 10 flywheels, is divided into two groups by geometric ratio and equal difference, and one group of the geometric ratio distribution is little mass flywheel, adopt flange and Bolt Connection, support is fixed, and one group of the equal difference distribution is big mass flywheel, employing conical surface location is by flywheel outer bolt.
2. ABS/ASR experiment table according to claim 1, it is characterized in that: the I axle of transmission case is a power input shaft, it is the part of ABS/ASR experiment table main shaft, the II axle is an intermediate shaft, it is passing to the III axle from the power of I axle, the III axle is a power output shaft, through torque sensor, universal joint and drive shaft connects with cylinder, the ratio of gear of transmission case is 1: 1, gear on the II axle can move axially, the power of realizing III axle and I axle engages and separates, this clutch action pushes away/draws realization by an oil cylinder, when being used for ABS or ASR performance test, the III axle of transmission case engages with the power of I axle, and the III axle separates with the power of I axle when being used for the test of detent traditional performance.
3. ABS/ASR experiment table according to claim 1, it is characterized in that: when being used for ABS performance test or ASR performance test, main shaft, inertial flywheel, transmission case, transmission shaft and universal joint, cylinder and tested wheel, when being used for the test of detent traditional performance, have only main shaft, inertial flywheel and tested detent to rotate.
4. ABS/ASR experiment table according to claim 1, it is characterized in that: slide unit can move axially and locking in position in pushing away/leaving behind of a servo-cylinder, can realize axial loading, axial load can be by set point adjustment, slide unit rotation axis end is a removable connector, axletree when being used for fixing the tumbler of detent or ABS, ASR test has caliper/back-plate fixed mechanism on the slide unit.
5. ABS/ASR experiment table according to claim 1, it is characterized in that: idler is on two rolling bearings, bearing seat is fixed on the rigid carriers, carriage is installed on the rolling guide, but, but make the normal pressure that produces FEEDBACK CONTROL between cylinder and the wheel in the promotion bottom bracket VTOL (vertical take off and landing) of a servo-cylinder.
6. ABS/ASR experiment table according to claim 1 is characterized in that: accident brake is installed on the main shaft of ABS/ASR experiment table, and except that emergency braking function, its brake pressure is adjustable, can realize the adjusting of cylinder rotational resistance torque.
7. ABS/ASR experiment table according to claim 1, it is characterized in that: on the pipeline that pressure of wheel cylinder is supplied with, have an X-over, when carrying out the ABS performance test, pressure oil process abs pressure regulator is again to the wheel cylinder fuel feeding, realization is to the adjusting of wheel-braking cylinder pressure, when carrying out the ASR performance test, pressure oil process ASR pressure governor is again to the wheel cylinder fuel feeding, realization is to the adjusting of wheel-braking cylinder pressure, carry out detent traditional performance when test, pressure oil without ABS or ASR pressure governor directly to the wheel-braking cylinder fuel feeding.
8. ABS/ASR experiment table according to claim 1 is characterized in that: be used to test the force transducer of brake braking force square, be installed on the rotation axis in the slide unit; Be used to test the torque sensor of cylinder moment, be installed on the transmission shaft between transmission case and the cylinder; The speed probe that is used for the test carriage wheel speed is installed on the slide unit rotation axis; Be used to test the speed pickup of main shaft and drum rotation speed, be installed on the main shaft; The force transducer that is used for the testing tire side force is installed in the inner end that makes the axially movable servo-cylinder of slide unit; Be used to test the force transducer of normal pressure between cylinder and wheel, be installed in the below of idler pulley carriage; Be used to test the pressure transducer of detent brake-pipe pressure, be installed in the brake piping of detent; Be used to test the pressure transducer of main shaft accident brake brake-pipe pressure, be installed in the brake piping of main shaft accident brake; Be used to test 4 temperature sensors of brake temperature, wherein 2 temperature sensors are installed on the fixture of detent, and other 2 temperature sensors are installed on the tumbler of detent, by being installed in the collector ring output on the main shaft.
9. ABS/ASR experiment table according to claim 1, it is characterized in that: the ASR drive motor that is installed in the frame side is sent to the ASR driven pulley to power by belt transmission, the ASR driven pulley is bearing in spindle nose by rolling bearing, make the rotation mutually noninterfere of ASR driven pulley and main shaft, the ASR driven pulley drives tested wheel by the wheel shaft coupling.
10. ABS/ASR experiment table according to claim 1 is characterized in that: two kinds of ASR performance test modes are arranged.First kind of test method is that main drive motor drives cylinder and inertial flywheel rotates, the ASR drive motor drives wheel simultaneously, the rotating speed of control main drive motor and ASR drive motor rotates wheel with certain slippage rate on cylinder, in order to the driving force of test wheel under different slippage rate situations; Second kind of test method is only to start the ASR drive motor to drive wheel, and wheel drives cylinder with certain slippage rate and inertial flywheel rotates, and rotates in order to the control that the ASR damping force that realizes tested wheel is regulated.
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| CNB2004100460105A CN100390521C (en) | 2004-06-01 | 2004-06-01 | Automobile ABS / ASR apparatus experiment table based on brake inertia test |
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| CNB2004100460105A CN100390521C (en) | 2004-06-01 | 2004-06-01 | Automobile ABS / ASR apparatus experiment table based on brake inertia test |
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