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Light truck driving load endurance test reinforcement coefficient calculation method

A calculation method and a technology for strengthening coefficients, which are applied in the fields of calculation, computer-aided design, electrical and digital data processing, etc., and can solve the problem of no effective test specification to verify the driving load.

Active Publication Date: 2021-05-07
DONGFENG AUTOMOBILE COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the problem that there is no effective test specification to verify the driving load in the prior art, and to provide a calculation method for the strengthening coefficient of the light truck driving load durability test

Method used

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  • Light truck driving load endurance test reinforcement coefficient calculation method
  • Light truck driving load endurance test reinforcement coefficient calculation method
  • Light truck driving load endurance test reinforcement coefficient calculation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0107] A method for calculating the enhancement coefficient of a light truck driving load durability test, the calculation method comprising the following steps:

[0108] Step 1: The user profile of the light truck to be calculated is known. The user profile is an NTBS research report. According to the statistics of the user profile, the distribution table of the driving conditions of vehicles of different tonnages is obtained;

[0109] Step 2: According to the proportion distribution table of vehicle driving conditions obtained in the previous step, select users of similar models corresponding to different working conditions of the light truck models to be calculated that are closest to the platform tonnage of the models to be calculated as typical users, and carry out Car follow-up investigation, install torque acquisition equipment on the transmission shaft and tires of typical user vehicles, and collect the road drive load torque spectrum under the conditions of high speed,...

Embodiment 2

[0138] Embodiment 2 is basically the same as Embodiment 1, and its difference is:

[0139] In the first step, the proportion distribution table of vehicle driving conditions is the proportion of the total mileage of the vehicle model to be calculated under the high-speed, urban, national highway, and mountainous conditions through the statistics of the user characteristics and product evaluation analysis in the NTBS research report. ratio, as shown in the table below:

[0140] total 4t 3t 2t 1t Small light truck highway urban road state Road mountain road

[0141] The 4t, 3t, 2t, 1t and small light trucks in the table are the tonnage of each platform of light trucks in the NTBS research report. In the second step, typical users choose similar models in the table that are closest to the platform tonnage as the mileage of light trucks to be calculated. percentage of the total mileage.

[0...

Embodiment 3

[0149] Embodiment 3 is basically the same as Embodiment 2, and its difference is:

[0150] Step 1: According to the NTBS research report, obtain the proportion distribution table of driving road conditions of vehicles with different tonnages, and select the working condition data of the 4t platform as the test working conditions for the light truck follow-up survey to be calculated;

[0151] total 4t 3t 2t 1t Small light truck highway 37.1％ 53.7％ 38.1％ 34.1％ 32.2％ 29.2％ urban road 50.5％ 35.3％ 50.2％ 51.3％ 54.9％ 56.5％ state Road 10.4％ 9.0％ 10.6％ 10.3％ 11.1％ 12.5％ mountain road 2.0％ 2.0％ 1.1％ 2.1％ 1.8％ 1.8％

[0152] Step 2: Carry out follow-up surveys on typical users of high-speed, mountainous, national highways, and urban road conditions, install torque acquisition equipment on the vehicle drive shaft and tires, and collect the road drive load torque spectrum of the vehicle drive shaft or tires, such as figure 2 ...

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Abstract

A light truck driving load endurance test reinforcement coefficient calculation method comprises the following steps: 1, according to user portrait statistics, obtaining a driving condition proportion distribution table of vehicles with different tonnages, 2, collecting road driving load torque spectrums under the working conditions of highways, downtown, national roads and mountainous areas in the actual use process of users, 3, counting the number of torques under each working condition through a rain flow counting analysis method, 4, calculating the damage degree of the market under each working condition in unit mileage, 5, counting and calculating the damage degree of the road surface of a test field under each working condition in unit mileage, 6, calculating the comprehensive damage degree of the market, and 5, calculating the comprehensive damage degree of the market. 7, calculating to obtain the comprehensive damage degree of the road surface of the test field; and 8, calculating to obtain a driving load durability strengthening coefficient. According to the design, the test working condition is close to the use working condition of a user, verification is more accurate, and the device can be applied to different platforms and different vehicle models and is wide in application range.

Description

technical field [0001] The invention relates to a calculation method for a strengthening coefficient of a light truck driving load durability test, which is specifically applicable to the field of driving load durability tests of automobiles. Background technique [0002] The driving load refers to the excitation force borne by the engine, clutch, gearbox, drive shaft, rear axle, tires and other parts when the car is driven, including torque, vibration acceleration, driving acceleration and deceleration, etc. Mainstream automobile companies at home and abroad only conduct component drive load tests on parts such as engines, clutches, gearboxes, drive shafts, rear axles, tires, etc. There is no specific specification for vehicle drive load durability tests, and there is no calculation of drive load durability test enhancement coefficients method and hardening factor value. [0003] At present, the durability test of the light truck industry basically implements the reliabili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/15G06F119/04G06F119/14
CPCG06F30/15G06F2119/04G06F2119/14
Inventor 林文干杨剑马红阳阳仁松李鑫何伟吕凤贤舒威
Owner DONGFENG AUTOMOBILE COMPANY