CN112903313A - Stability test method for heavy-duty car brake system - Google Patents
Stability test method for heavy-duty car brake system Download PDFInfo
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Abstract
The invention discloses a stability test method for a heavy-duty car brake system, which comprises the following steps: s1, preparing instruments required by the test: the system comprises a weather instrument, a speedometer, a data acquisition system, a pressure sensor, a temperature sensor, a gyroscope and a mass center platform; s2, testing conditions and relevant requirements of a test vehicle; s3, testing the stability of the typical downhill brake; and S4, emergency braking test. The device is combined with a weather meter, a speedometer, a data acquisition system, a pressure sensor, a temperature sensor, a gyroscope and a mass center platform to be jointly used for the stability test of the heavy-duty automobile braking system, a special test is carried out on the braking stability of the heavy-duty automobile on a long downhill and a flat road in the test process, and through strict control on various parameters in the test process, test data of a more comprehensive system is obtained and is used for subsequent evaluation of the stability of the heavy-duty automobile braking system, so that the device is more scientific and reasonable.
Description
Technical Field
The invention relates to the technical field of automobile testing methods, in particular to a method for testing stability of a heavy-duty automobile braking system.
Background
The existing testing method of the braking system of the automobile is very primary, mainly tests the braking distance and the braking time, cannot objectively, truly and effectively evaluate the performance of the braking system of the whole automobile, and has great limitation. With the continuous improvement of the braking requirements of automobiles, particularly heavy automobiles, at present, no complete and scientific test method system exists, so that the evaluation of the braking system of the heavy automobile is less scientific and reasonable.
Disclosure of Invention
The invention aims to provide a scientific, reasonable and complete method for testing the stability of the heavy-duty car brake system.
Therefore, the technical scheme adopted by the invention is as follows: a method for testing the stability of a braking system of a heavy-duty car comprises the following steps:
s1, preparing instruments required by the test: the system comprises a weather instrument, a speedometer, a data acquisition system, a pressure sensor, a temperature sensor, a gyroscope and a mass center platform; the speed meter is arranged on a longitudinal symmetrical plane of the heavy vehicle, and the gyroscope is arranged close to the position of the mass center;
s2, testing conditions and relevant requirements of a test vehicle;
s2-1 test road
S2-1-1, wherein the length of the long downhill test road is not less than 5000m, the average width is not less than 5m, the average gradient is not less than 10%, and the road surface is neat and dry;
s2-1-2, leveling the test road, wherein the length is not less than 2000m, the width is not less than 6m, the longitudinal gradient is not more than 1%, the transverse gradient is not more than 2%, and the road surface is neat and dry;
s2-2, meteorological conditions
The atmospheric pressure is 80-110 kPa, the wind speed is less than 5m/s, and the air temperature is 5-35 ℃;
s2-3, test vehicle and load
S2-3-1, testing a vehicle braking system, wherein the vehicle braking system is a qualified product meeting the technical requirements of the vehicle braking system;
s2-3-2, the driving mileage of the test vehicle is less than 2000km, and the tire air pressure is the cold inflation pressure recommended by the test vehicle manufacturer;
s2-3-3, the test vehicle is in a rated full-load state specified by a manufacturer, loads are uniformly distributed and fixed, so that load transfer cannot occur in the test, the test vehicle is weighed by using weighing equipment, and the wheel load difference ratio of each shaft is not more than 5%; measuring the wheel base between the axles, measuring the wheel base of each axle and measuring the mass center position of the vehicle;
s2-3-4, the test vehicle should run in the brake;
s3, testing the stability of the typical downhill brake;
s3-1, starting the test vehicle on a road with a relatively flat slope top, accelerating to the vehicle speed of 30-32 km/h, stabilizing for at least 5 seconds, disconnecting the engine, carrying out emergency braking at 30km/h +/-0.2 km/h until the test vehicle stops, and recording test data;
s3-2, carrying out long-distance downhill driving on the test vehicle, controlling the vehicle speed to be 30 +/-5 km/h, ensuring that the rotating speed of the engine does not exceed the rated rotating speed specified by a manufacturer by using a gear of the transmission, and recording test data;
s3-3, terminating the test when one of the following conditions occurs in the test process: the temperature of the brake drum (disc) exceeds 400 ℃; the lateral acceleration is greater than 1m/s 2; the vehicle speed can not be controlled within 30 +/-5 km/h; the air pressure of the braking system is lower than 500 kPa;
s3-4, after the downhill test is finished, the test vehicle quickly starts to accelerate to 30-32 km/h on a relatively flat road on the slope bottom and is stabilized for at least 5 seconds, then the engine is disconnected, emergency braking is carried out until the test vehicle stops at 30km/h +/-0.2 km/h, and test data are recorded;
s3-5, measuring and recording at least including the average deceleration, the initial braking speed, the final braking speed, the temperature of a brake drum (disc), the air pressure change of an air storage cylinder, the air pressure and the temperature of the tire before and after the test, the time interval, the longitudinal inclination angle of the vehicle, the transverse inclination angle of the vehicle and the transverse acceleration of each braking;
s4 Emergency braking test
S4-1, starting the test vehicle on a flat road, accelerating to the speed of 60-62 km/h, stabilizing for at least 5 seconds, disconnecting the engine, carrying out emergency braking at 60km/h +/-0.2 km/h until the test vehicle stops, and recording test data;
s4-2, rapidly starting the test vehicle on a flat road, accelerating to the speed of 60-62 km/h, stabilizing for at least 5 seconds, and disconnecting the engine; when the vehicle speed is 60km/h +/-0.2 km/h, carrying out emergency braking to 30km/h +/-5 km/h to remove the emergency braking, rapidly accelerating the vehicle speed of the test vehicle to 60 km/h-62 km/h and stabilizing for at least 5 seconds, and repeatedly carrying out emergency braking-emergency braking removal for 50 times, wherein the used gear of the transmission is used for ensuring that the rotating speed of the engine does not exceed the rated rotating speed specified by a manufacturer;
s4-3, in the 50 times of emergency braking tests, one of the following conditions occurs to terminate the test: the braking distance is more than 36 m; the temperature of the brake drum (disc) exceeds 400 ℃; a lane departure of 3.5m wide; the lateral acceleration is greater than 1m/s 2; the air pressure of the braking system is lower than 500 kPa;
s4-4, after 50 times of emergency braking tests are finished, rapidly accelerating the test vehicle on a flat road to the speed of 60-62 km/h and stabilizing for at least 5 seconds, disconnecting the engine, carrying out emergency braking at 60km/h +/-0.2 km/h until the test vehicle stops, and recording test data;
s4-5, measuring and recording at least comprising the sufficient average deceleration of each braking, the initial braking speed, the final braking speed, the temperature of a brake drum (disc), the air pressure change of an air storage cylinder, the air pressure and the temperature of the tire before and after the test, the time interval, the longitudinal inclination angle of the vehicle, the transverse inclination angle of the vehicle and the transverse acceleration of each braking.
Preferably, in step S1, the measurement range of the weather meter is: temperature: -10 ℃ to 60 ℃; humidity: 0% RH to 100% RH; atmospheric pressure: 300hPa to 1200 hPa; wind speed: 0.4-25 m/s; maximum error of the weather meter: temperature: plus or minus 0.1 ℃; humidity: plus or minus 0.1 percent; 0.1hPa under the atmospheric pressure; wind speed: 0.1 m/s.
More preferably, in step S1, the measurement range of the speedometer is: 0 km/h-220 km/h; maximum error of speedometer: the speed is 0.1 km/h; speed output frequency: 200 Hz; an output mode: CAN, pulse.
More preferably, in step S1, the data acquisition system adopts a scalable 24-channel analog channel number, a scalable 16-channel digital quantity input, and a scalable 2-channel CAN interface; working temperature: -10 to 55 ℃; the channel precision is as follows: 0.1 percent;
single channel maximum sampling frequency: 100 kHz; single channel AD:24 bit.
More preferably, in step S1, the measurement range of the pressure sensor is 0bar to 15 bar; combined non-linearity + hysteresis: 0.5% FSmax; long-term stability: 0.5% FS/year typ.
More preferably, in the step S1, the measurement range of the temperature sensor is-41 ℃ to 1000 ℃; the maximum error of the temperature sensor is +/-1.5 ℃.
More preferably, in step S1, the gyroscope performs high-performance nine-vector attitude measurement, and all signals are output at 200 Hz; acceleration range: plus or minus 18 g; angular velocity range: 300 degrees/s; acceleration accuracy: 0.1m/s 2; angular velocity accuracy: 0.1 °/s; angular accuracy: 0.1 degree; speed precision: 0.1 km/h.
More preferably, in step S1, the size of the top of the centroid platform is 12 × 3.3 m; weighing range: 0-40000 kg; angle range: 0 to 50 degrees; weight precision: 5 kg; angle accuracy: 0.5 degree.
The invention has the beneficial effects that: the device is combined with a weather meter, a speedometer, a data acquisition system, a pressure sensor, a temperature sensor, a gyroscope and a mass center platform to be commonly used for the stability test of the heavy-duty car braking system, a special test is carried out on the braking stability of the heavy-duty car on a long downhill and a flat road in the test process, and through strict control on various parameters in the test process, test data of a more comprehensive system is obtained and is used for subsequent evaluation of the stability of the heavy-duty car braking system, so that the device is more scientific and reasonable.
Detailed Description
The invention is further illustrated by the following examples:
a stability test method for a heavy-duty car brake system comprises the following steps:
s1, preparing instruments required by the test: the system comprises a weather instrument, a speedometer, a data acquisition system, a pressure sensor, a temperature sensor, a gyroscope and a mass center platform; the speed meter is arranged on a longitudinal symmetrical plane of the heavy vehicle, and the gyroscope is arranged close to the position of the mass center;
the measuring range of the weather instrument is as follows: temperature: -10 ℃ to 60 ℃; humidity: 0% RH to 100% RH; atmospheric pressure: 300hPa to 1200 hPa; wind speed: 0.4-25 m/s;
maximum error of the weather meter: temperature: plus or minus 0.1 ℃; humidity: plus or minus 0.1 percent; 0.1hPa under the atmospheric pressure; wind speed: 0.1 m/s.
The measurement range of the speedometer is: 0 km/h-220 km/h; maximum error of speedometer: the speed is 0.1 km/h; speed output frequency: 200 Hz; an output mode: CAN, pulse.
The data acquisition system adopts 24-channel expandable analog channel number, 16-channel expandable digital quantity input and 2-channel expandable CAN interface; working temperature: -10 to 55 ℃; channel accuracy: 0.1 percent;
single channel maximum sampling frequency: 100 kHz; single channel AD:24 bit.
The measuring range of the pressure sensor is 0 bar-15 bar; combined non-linearity + hysteresis: 0.5% FSmax; long-term stability: 0.5% FS/year typ.
The measuring range of the temperature sensor is-41 ℃ to 1000 ℃; the maximum error of the temperature sensor is +/-1.5 ℃.
The gyroscope adopts high-performance nine-vector attitude measurement, and all signals are output at 200 Hz; acceleration range: plus or minus 18 g; angular velocity range: 300 degrees/s; acceleration accuracy: 0.1m/s 2; angular velocity accuracy: 0.1 °/s; angular accuracy: 0.1 degree; speed precision: 0.1 km/h.
The size of the table top of the centroid platform is 12 multiplied by 3.3 m; weighing range: 0-40000 kg; angle range: 0 to 50 degrees; weight precision: 5 kg; angle accuracy: 0.5 degree.
As shown in table 1.
TABLE 1 measuring Range and maximum error of measuring instrument
S2, testing conditions and relevant requirements of a test vehicle;
s2-1 test road
S2-1-1, wherein the length of the long downhill test road is not less than 5000m, the average width is not less than 5m, the average gradient is not less than 10%, and the road surface is neat and dry;
s2-1-2, leveling the test road, wherein the length is not less than 2000m, the width is not less than 6m, the longitudinal gradient is not more than 1%, the transverse gradient is not more than 2%, and the road surface is neat and dry;
s2-2, meteorological conditions
The atmospheric pressure is 80-110 kPa, the wind speed is less than 5m/s, and the air temperature is 5-35 ℃;
s2-3, test vehicle and load
S2-3-1, testing a vehicle braking system, wherein the vehicle braking system is a qualified product meeting the technical requirements of the vehicle braking system;
s2-3-2, the driving mileage of the test vehicle is less than 2000km, and the tire air pressure is the cold inflation pressure recommended by the test vehicle manufacturer;
s2-3-3, the test vehicle is in a rated full-load state specified by a manufacturer, loads are uniformly distributed and fixed, so that load transfer cannot occur in the test, the test vehicle is weighed by using weighing equipment, and the wheel load difference ratio of each shaft is not more than 5%; measuring the wheel base between the axles, measuring the wheel base of each axle and measuring the mass center position of the vehicle;
s2-3-4, the test vehicle should run in the brake;
s3, testing the stability of the typical downhill brake;
s3-1, starting the test vehicle on a road with a relatively flat slope top, accelerating to the vehicle speed of 30-32 km/h, stabilizing for at least 5 seconds, disconnecting the engine, carrying out emergency braking at 30km/h +/-0.2 km/h until the test vehicle stops, and recording test data;
s3-2, carrying out long-distance downhill driving on the test vehicle, controlling the vehicle speed to be 30 +/-5 km/h, ensuring that the rotating speed of the engine does not exceed the rated rotating speed specified by a manufacturer by using a gear of the transmission, and recording test data;
s3-3, terminating the test when one of the following conditions occurs in the test process: the temperature of the brake drum (disc) exceeds 400 ℃; the lateral acceleration is greater than 1m/s 2; the vehicle speed can not be controlled within 30 +/-5 km/h; the air pressure of the braking system is lower than 500 kPa;
s3-4, after the downhill test is finished, the test vehicle quickly starts to accelerate to 30-32 km/h on a relatively flat road on the slope bottom and is stabilized for at least 5 seconds, then the engine is disconnected, emergency braking is carried out until the test vehicle stops at 30km/h +/-0.2 km/h, and test data are recorded;
s3-5, measuring and recording at least comprising the sufficient average deceleration of each braking, the initial braking speed, the final braking speed, the temperature of a brake drum (disc), the air pressure change of an air storage cylinder, the air pressure and the temperature of the tire before and after the test, the time interval, the longitudinal inclination angle of the vehicle, the transverse inclination angle of the vehicle and the transverse acceleration of each braking.
S4 Emergency braking test
S4-1, starting the test vehicle on a flat road, accelerating to the speed of 60-62 km/h, stabilizing for at least 5 seconds, disconnecting the engine, carrying out emergency braking at 60km/h +/-0.2 km/h until the test vehicle stops, and recording test data;
s4-2, rapidly starting the test vehicle on a flat road, accelerating to the speed of 60-62 km/h, stabilizing for at least 5 seconds, and disconnecting the engine; when the vehicle speed is 60km/h +/-0.2 km/h, carrying out emergency braking to 30km/h +/-5 km/h to remove the emergency braking, rapidly accelerating the vehicle speed of the test vehicle to 60 km/h-62 km/h and stabilizing for at least 5 seconds, and repeatedly carrying out emergency braking-emergency braking removal for 50 times, wherein the used gear of the transmission is used for ensuring that the rotating speed of the engine does not exceed the rated rotating speed specified by a manufacturer;
s4-3, in the 50 times of emergency braking tests, one of the following conditions occurs to terminate the test: the braking distance is more than 36 m; the temperature of the brake drum (disc) exceeds 400 ℃; a lane departure of 3.5m wide; the lateral acceleration is greater than 1m/s 2; the air pressure of the braking system is lower than 500 kPa;
s4-4, after 50 times of emergency braking tests are finished, rapidly accelerating the test vehicle on a flat road to the speed of 60-62 km/h and stabilizing for at least 5 seconds, disconnecting the engine, carrying out emergency braking at 60km/h +/-0.2 km/h until the test vehicle stops, and recording test data;
s4-5, measuring and recording at least comprising the sufficient average deceleration of each braking, the initial braking speed, the final braking speed, the temperature of a brake drum (disc), the air pressure change of an air storage cylinder, the air pressure and the temperature of the tire before and after the test, the time interval, the longitudinal inclination angle of the vehicle, the transverse inclination angle of the vehicle and the transverse acceleration of each braking. Description of technical terms:
(1) longitudinal inclination-the angle of pitch (the angle of rotation about the y-axis) of the vehicle.
(2) Lateral tilt-the angle at which the vehicle rolls (the angle of rotation about the x-axis).
(3) Longitudinal acceleration-the acceleration in the direction of travel of the vehicle.
(4) Lateral acceleration-the component of the vehicle's center of mass (or sprung mass) acceleration vector in the y-direction.
(5) Emergency braking-when the vehicle encounters an emergency while in motion, the driver quickly actuates the brake pedal to stop the vehicle.
(6) Braking distance-the distance a vehicle travels from when the foot touches the brake pedal (or the hand touches the brake handle) to when the vehicle stops when the vehicle suddenly steps on the brake at a predetermined initial speed.
(7) Wheel load difference ratio-the ratio of the absolute value of the difference between the bearing masses of the left and right wheels on the same shaft to half the shaft load of the shaft.
The brake stability test record table a1, the brake stability data analysis table a2, and the brake stability data analysis table A3 are as follows.
A1 braking stability test recording table
A2 braking stability data analysis table
A3 braking stability data analysis table
Claims (8)
1. A stability test method for a heavy-duty car brake system is characterized by comprising the following steps:
s1, preparing instruments required by the test: the system comprises a weather instrument, a speedometer, a data acquisition system, a pressure sensor, a temperature sensor, a gyroscope and a mass center platform; the speed meter is arranged on a longitudinal symmetrical plane of the heavy vehicle, and the gyroscope is arranged close to the position of the mass center;
s2, testing conditions and relevant requirements of a test vehicle;
s2-1 test road
S2-1-1, wherein the length of the long downhill test road is not less than 5000m, the average width is not less than 5m, the average gradient is not less than 10%, and the road surface is neat and dry;
s2-1-2, leveling the test road, wherein the length is not less than 2000m, the width is not less than 6m, the longitudinal gradient is not more than 1%, the transverse gradient is not more than 2%, and the road surface is neat and dry;
s2-2, meteorological conditions
The atmospheric pressure is 80-110 kPa, the wind speed is less than 5m/s, and the air temperature is 5-35 ℃;
s2-3, test vehicle and load
S2-3-1, testing a vehicle braking system, wherein the vehicle braking system is a qualified product meeting the technical requirements of the vehicle braking system;
s2-3-2, the driving mileage of the test vehicle is less than 2000km, and the tire air pressure is the cold inflation pressure recommended by the test vehicle manufacturer;
s2-3-3, the test vehicle is in a rated full-load state specified by a manufacturer, loads are uniformly distributed and fixed, so that load transfer cannot occur in the test, the test vehicle is weighed by using weighing equipment, and the wheel load difference ratio of each shaft is not more than 5%; measuring the wheel base between the axles, measuring the wheel base of each axle and measuring the mass center position of the vehicle;
s2-3-4, the test vehicle should run in the brake;
s3, testing the stability of the typical downhill brake;
s3-1, starting the test vehicle on a road with a relatively flat slope top, accelerating to the speed of 30-32 km/h, stabilizing for at least 5 seconds, disconnecting the engine, carrying out emergency braking at 30km/h +/-0.2 km/h until the test vehicle stops, and recording test data;
s3-2, carrying out long-distance downhill driving on the test vehicle, controlling the vehicle speed to be 30 +/-5 km/h, ensuring the rotating speed of the engine not to exceed the rated rotating speed specified by a manufacturer by using a transmission gear, and recording test data;
s3-3, terminating the test when one of the following conditions occurs in the test process: the temperature of the brake drum (disc) exceeds 400 ℃; the lateral acceleration is greater than 1m/s 2; the vehicle speed can not be controlled within 30 +/-5 km/h; the air pressure of the braking system is lower than 500 kPa;
s3-4, after the downhill test is finished, the test vehicle quickly starts to accelerate to 30-32 km/h on a relatively flat road on the slope bottom and is stabilized for at least 5 seconds, then the engine is disconnected, emergency braking is carried out until the test vehicle stops at 30km/h +/-0.2 km/h, and test data are recorded;
s3-5, measuring and recording at least including the full-emission average deceleration, the initial braking speed, the final braking speed, the temperature of a brake drum (disc), the air pressure change of an air storage cylinder, the air pressure and the temperature of tires before and after the test, the time interval, the longitudinal inclination angle of the vehicle, the transverse inclination angle of the vehicle and the transverse acceleration of each braking;
s4 Emergency braking test
S4-1, starting the test vehicle on a flat road, accelerating to the speed of 60-62 km/h, stabilizing for at least 5 seconds, disconnecting the engine, carrying out emergency braking at 60km/h +/-0.2 km/h until the test vehicle stops, and recording test data;
s4-2, rapidly starting the test vehicle on a flat road, accelerating to the speed of 60-62 km/h, stabilizing for at least 5 seconds, and disconnecting the engine; when the vehicle speed is 60km/h +/-0.2 km/h, carrying out emergency braking to 30km/h +/-5 km/h to remove the emergency braking, rapidly accelerating the vehicle speed of the test vehicle to 60 km/h-62 km/h and stabilizing for at least 5 seconds, and repeatedly carrying out emergency braking-emergency braking removal for 50 times, wherein the used gear of the transmission is used for ensuring that the rotating speed of the engine does not exceed the rated rotating speed specified by a manufacturer;
s4-3, in the 50 times of emergency braking tests, one of the following conditions occurs to terminate the test: the braking distance is more than 36 m; the temperature of the brake drum (disc) exceeds 400 ℃; a lane departure of 3.5m wide; the lateral acceleration is greater than 1m/s 2; the air pressure of the braking system is lower than 500 kPa;
s4-4, after 50 times of emergency braking tests are finished, rapidly accelerating the test vehicle on a flat road to the speed of 60-62 km/h and stabilizing for at least 5 seconds, disconnecting the engine, carrying out emergency braking at 60km/h +/-0.2 km/h until the test vehicle stops, and recording test data;
s4-5, measuring and recording at least comprising the sufficient average deceleration of each braking, the initial braking speed, the final braking speed, the temperature of a brake drum (disc), the air pressure change of an air storage cylinder, the air pressure and the temperature of the tire before and after the test, the time interval, the longitudinal inclination angle of the vehicle, the transverse inclination angle of the vehicle and the transverse acceleration of each braking.
2. The method for testing the stability of a braking system of a heavy-duty vehicle as claimed in claim 1, wherein: in step S1, the measurement range of the weather meter is: temperature: -10 ℃ to 60 ℃; humidity: 0% RH to 100% RH; atmospheric pressure: 300hPa to 1200 hPa; wind speed: 0.4-25 m/s;
maximum error of the weather meter: temperature: plus or minus 0.1 ℃; humidity: plus or minus 0.1 percent; 0.1hPa under the atmospheric pressure; wind speed: 0.1 m/s.
3. The method for testing the stability of a braking system of a heavy-duty vehicle as claimed in claim 1, wherein: in step S1, the measurement range of the speedometer is: 0 km/h-220 km/h; maximum error of speedometer: the speed is 0.1 km/h; speed output frequency: 200 Hz; an output mode: CAN, pulse.
4. The method for testing the stability of a braking system of a heavy-duty vehicle as claimed in claim 1, wherein: in the step S1, the data acquisition system adopts 24 channels of expandable analog channel number, 16 channels of expandable digital quantity input, and 2 channels of expandable CAN interface; working temperature: -10 to 55 ℃; channel accuracy: 0.1 percent; single channel maximum sampling frequency: 100 kHz; single channel AD:24 bit.
5. The method for testing the stability of a braking system of a heavy-duty vehicle as claimed in claim 1, wherein: in step S1, the measurement range of the pressure sensor is 0bar to 15 bar; combined non-linearity + hysteresis: 0.5% FSmax; long-term stability: 0.5% FS/year typ.
6. The method for testing the stability of a braking system of a heavy-duty vehicle as claimed in claim 1, wherein: in the step S1, the measurement range of the temperature sensor is-41 ℃ to 1000 ℃; the maximum error of the temperature sensor is +/-1.5 ℃.
7. The method for testing the stability of a braking system of a heavy-duty vehicle as claimed in claim 1, wherein: in the step S1, the gyroscope performs high-performance nine-vector attitude measurement, and all signals are output at 200 Hz; acceleration range: plus or minus 18 g; angular velocity range: 300 degrees/s; acceleration accuracy: 0.1m/s 2; angular velocity accuracy: 0.1 °/s; angular accuracy: 0.1 degree; speed precision: 0.1 km/h.
8. The method for testing the stability of a braking system of a heavy-duty vehicle as claimed in claim 1, wherein: in the step S1, the size of the top of the centroid platform is 12 × 3.3 m; weighing range: 0-40000 kg; angle range: 0 to 50 degrees; weight precision: 5 kg; angle accuracy: 0.5 degree.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113640017A (en) * | 2021-08-31 | 2021-11-12 | 中汽院(重庆)汽车检测有限公司 | Test evaluation system and method for automatic emergency braking system of commercial vehicle |
| CN113834597A (en) * | 2021-10-12 | 2021-12-24 | 中国汽车工程研究院股份有限公司 | Method for measuring and processing data of BTV (brake torque converter) of commercial vehicle disc brake assembly |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3979950A (en) * | 1975-03-06 | 1976-09-14 | Maxwell Lloyd R | Brake testing method |
| KR870005657U (en) * | 1985-09-04 | 1987-04-24 | 대우중공업 주식회사 | Industrial vehicle braking distance measuring device |
| JP2001183260A (en) * | 1999-12-24 | 2001-07-06 | Meidensha Corp | Test system for vehicle brake |
| CN1613005A (en) * | 2001-12-07 | 2005-05-04 | 巴黎独立运输公司 | System for automatically determining a public transport vehicle emergency braking characteristics, in particular of a railway vehicle |
| KR101652884B1 (en) * | 2015-04-10 | 2016-08-31 | 주식회사 제일기연 | Autonomous emergency braking testing equipment and method thereof |
| KR102011664B1 (en) * | 2018-06-07 | 2019-08-19 | 계명대학교 산학협력단 | Test evaluation apparatus for autonomous emergency braking system and control method thereof |
| CN110763485A (en) * | 2019-11-05 | 2020-02-07 | 中国汽车工程研究院股份有限公司 | Method and system for testing performance of automobile anti-heat fading braking system |
| CN111361413A (en) * | 2020-02-20 | 2020-07-03 | 南京工程学院 | Vehicle running detection control system and method |
| CN111487069A (en) * | 2020-04-20 | 2020-08-04 | 中国汽车工程研究院股份有限公司 | Automobile brake test system and method thereof |
| CN111537241A (en) * | 2020-05-12 | 2020-08-14 | 北京汽车集团越野车有限公司 | Vehicle braking performance evaluation method |
| CN111795830A (en) * | 2020-05-25 | 2020-10-20 | 中国第一汽车股份有限公司 | Brake efficiency testing method |
| CN112051065A (en) * | 2020-08-19 | 2020-12-08 | 中国第一汽车股份有限公司 | Engine brake system testing method |
-
2021
- 2021-02-05 CN CN202110166769.0A patent/CN112903313B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3979950A (en) * | 1975-03-06 | 1976-09-14 | Maxwell Lloyd R | Brake testing method |
| KR870005657U (en) * | 1985-09-04 | 1987-04-24 | 대우중공업 주식회사 | Industrial vehicle braking distance measuring device |
| JP2001183260A (en) * | 1999-12-24 | 2001-07-06 | Meidensha Corp | Test system for vehicle brake |
| CN1613005A (en) * | 2001-12-07 | 2005-05-04 | 巴黎独立运输公司 | System for automatically determining a public transport vehicle emergency braking characteristics, in particular of a railway vehicle |
| KR101652884B1 (en) * | 2015-04-10 | 2016-08-31 | 주식회사 제일기연 | Autonomous emergency braking testing equipment and method thereof |
| KR102011664B1 (en) * | 2018-06-07 | 2019-08-19 | 계명대학교 산학협력단 | Test evaluation apparatus for autonomous emergency braking system and control method thereof |
| CN110763485A (en) * | 2019-11-05 | 2020-02-07 | 中国汽车工程研究院股份有限公司 | Method and system for testing performance of automobile anti-heat fading braking system |
| CN111361413A (en) * | 2020-02-20 | 2020-07-03 | 南京工程学院 | Vehicle running detection control system and method |
| CN111487069A (en) * | 2020-04-20 | 2020-08-04 | 中国汽车工程研究院股份有限公司 | Automobile brake test system and method thereof |
| CN111537241A (en) * | 2020-05-12 | 2020-08-14 | 北京汽车集团越野车有限公司 | Vehicle braking performance evaluation method |
| CN111795830A (en) * | 2020-05-25 | 2020-10-20 | 中国第一汽车股份有限公司 | Brake efficiency testing method |
| CN112051065A (en) * | 2020-08-19 | 2020-12-08 | 中国第一汽车股份有限公司 | Engine brake system testing method |
Non-Patent Citations (3)
| Title |
|---|
| 梁荣亮;王羽;谢晋中;过学迅;高吉强;: "整车制动道路试验测试研究", 武汉理工大学学报(交通科学与工程版), no. 04, pages 748 - 752 * |
| 鲍晓东;侯勇;张绍国;: "轮胎转鼓试验设备制动特性分析", 机械设计与制造, no. 11, pages 155 - 157 * |
| 黄超智 等: "基于JT/T 1242-2019的AEB测试研究", 公路与汽运, no. 03, pages 1 - 6 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113640017A (en) * | 2021-08-31 | 2021-11-12 | 中汽院(重庆)汽车检测有限公司 | Test evaluation system and method for automatic emergency braking system of commercial vehicle |
| CN113834597A (en) * | 2021-10-12 | 2021-12-24 | 中国汽车工程研究院股份有限公司 | Method for measuring and processing data of BTV (brake torque converter) of commercial vehicle disc brake assembly |
| CN113834597B (en) * | 2021-10-12 | 2024-03-26 | 中国汽车工程研究院股份有限公司 | Measurement and data processing method for BTV of commercial vehicle disc brake assembly |
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