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Full-time four-wheel-drive automobile braking force detection apparatus

A technology of automobile braking and braking force, which is applied in the direction of measuring devices, vehicle testing, force/torque/power measuring instruments, etc., and can solve the problem of high operation and environmental requirements, poor repeatability, and damage to vehicle differentials or gearboxes and other problems, to achieve the effect of simple operation, solving detection problems, and avoiding the risk of damage

Inactive Publication Date: 2017-05-31
ZHEJIANG MEASUREMENT SCI RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the continuous development of the automobile industry, many high-end cars have adopted full-time all-wheel drive (AWD). When some AWD vehicles are tested on the roller reaction brake test bench, the vehicle differential or transmission will be damaged. box damage
At this stage, some testing stations use flat-panel brake testing benches to perform in-line braking inspections on AWD vehicles. However, compared with roller reaction braking testing benches, flat-panel braking testing benches have poor repeatability and have higher requirements for operation and environment. shortcoming

Method used

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  • Full-time four-wheel-drive automobile braking force detection apparatus
  • Full-time four-wheel-drive automobile braking force detection apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] In this embodiment, the full-time four-wheel drive vehicle braking force detection device is tested, and the full-time four-wheel drive vehicle braking force detection device is installed at a certain place testing station A, and three types of full-time four-wheel drive vehicles Subaru Impreza, Volkswagen Tiguan, and Audi are selected. As a test vehicle, Q5 was driven on the braking force detection device of a full-time four-wheel drive vehicle for three braking force detections. According to GB7258-2012 "Motor Vehicle Operation Safety Technical Conditions" and GBT13564-2005 "Drum Reaction Vehicle Braking Test Bench", the comparative test is carried out according to the following steps:

[0026] 1) According to the instructions, install the mechanical platform and system instruments, and park the test vehicle within the width limit mark of the test road after checking.

[0027] 2) Turn on the power, turn on the computer, start the host computer test software, log in to...

Embodiment 2

[0041] In this embodiment, the full-time four-wheel drive vehicle braking force testing device is calibrated. A full-time four-wheel drive vehicle braking force testing device is installed in a manufacturer B in a certain place, and the calibration frame is fixed on the roller. Dynamic calibration. Use a dedicated calibration device to sequentially load the mass of weights ( m i ) to full scale, and then reduce the mass of weights in turn ( m i ) to zero, measure the indicated value of the braking force AD ​​of the left and right wheels corresponding to the set calibration points, repeat the measurement two or three times for each calibration point, and take the arithmetic mean value.

[0042]In the actual calibration of this device, L / R is 10, and the measurement data are shown in Table 4.

[0043] Table 4 Braking force calibration measurement data

[0044] Loading weight value / kg 50 100 150 200 250 300 350 400 Braking force value / daN 490 980 14...

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Abstract

The invention relates to a full-time four-wheel-drive automobile braking force detection apparatus, comprising a braking inspection bench mechanical unit, a single-chip microcomputer and a circuit control system; the single-chip microcomputer and the circuit control system acquire data, process the data and output the data for braking force of the braking inspection bench mechanical unit, so that high-precision high-reliability inspection is provided for the braking force of a full-time four-wheel-drive automobile. In detection of front wheels, the front wheels are positioned on a braking roller set, a tire tightening device operates and tightens tires to prevent their movements from affecting detection results, and rear wheels rotate together on a free roller set; in addition, in detection of the rear wheels, the front wheels are arranged on the free roller set, and the rear wheels are arranged on the braking roller set. The problem that detection by a traditional braking force inspection bench may cause transmission damage to a four-wheel-drive vehicle can be solved effectively, and the risk of the vehicle being damaged is avoided.

Description

technical field [0001] The invention relates to a detection device, in particular to a novel braking force detection device for a full-time four-wheel drive vehicle. Background technique [0002] At present, the vehicle braking performance of light vehicles is mainly tested by the roller reaction brake test bench and the flat brake test bench. Most of the domestic motor vehicle security inspection institutions generally use the roller reaction brake test bench. It is actually a mechanically simulated road surface. After the tested car drives up, it can simulate the state of braking on the road. At the same time, the braking force and other related parameters are measured by sensors placed on the "road surface" to judge the braking performance of the car. basis. However, with the continuous development of the automobile industry, many high-end cars have adopted full-time all-wheel drive (AWD). When some AWD vehicles are tested on the roller reaction brake test bench, the veh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M17/007G01L5/28G05B19/042
CPCG01M17/0072G01L5/282G05B19/042
Inventor 邵建文严瑾叶振洲张昕
Owner ZHEJIANG MEASUREMENT SCI RES INST
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