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Decomposition test method for sliding resistance of a passenger car

A technology of sliding resistance and testing methods, applied in vehicle testing, force/torque/power measuring instruments, testing of machines/structural components, etc.

Active Publication Date: 2020-02-11
CATARC AUTOMOTIVE TEST CENT TIANJIN CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a certain gap between the simulated vehicle working conditions and the actual operating conditions in the test test, and when the test sample is tested on the bench, the load and vibration of the sample are different from those under the running state of the whole vehicle.

Method used

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  • Decomposition test method for sliding resistance of a passenger car

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Embodiment Construction

[0069] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0070] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and thus should not be construed as limiting the invention. In addition, the terms "first", "second", etc. are used for descriptive purposes only, and should not be interpreted...

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Abstract

The invention provides a vehicle coasting resistance decomposition test method for a passenger vehicle. The method includes the following steps of: A, vehicle and transmission system parameter preparation; step B, road coasting testing; step C, chassis dynamometer testing; step D, 4-wheel-drive five-motor testing; and step E, two-wheel-drive three-motor testing. The step D further includes the following steps that: step d1, the rolling resistance of tires is calculated according to test results of the step C and the step D; and step d2, brake caliper drag force and wheel hub bearing force testing is performed. The vehicle coasting resistance decomposition test method for the passenger vehicle of the invention can be applied to the research and development verification of a vehicle including the resistance comparative analysis of quality competing vehicle models, the resistance decomposition and transmission system part selection of development vehicle models and the resistance test aswell as optimization and improvement of mass-produced vehicle models. The method has the advantages of high universality, high accuracy, high repeatability and high interchangeability, and can meet the requirements of the resistance test of a transmission system.

Description

technical field [0001] The invention belongs to the field of automobile research and development testing, and in particular relates to a method for decomposing and testing the slide resistance of a passenger car. Background technique [0002] Vehicle sliding resistance includes air resistance, rolling resistance, drive train resistance, brake drag resistance, hub bearing resistance, etc. The size of sliding resistance affects the performance of the transmission system (especially the transmission efficiency), and is one of the key factors for vehicle power, fuel economy and emission standards, especially has a great impact on fuel economy. The national regulations GB19578-2014 "Limits of Fuel Consumption of Passenger Cars" and GB27999-2014 "Evaluation Methods and Indicators of Fuel Consumption of Passenger Cars", which came into effect on January 1, 2016, put forward very strict requirements on the fuel consumption of vehicles. Reducing the sliding resistance of vehicles is...

Claims

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Application Information

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IPC IPC(8): G01L5/00G01L5/28G01M17/007
CPCG01L5/00G01L5/28G01M17/007
Inventor 杨建军张先锋刘双喜高继东张佳力白巴特尔牛亚卓陈红涛
Owner CATARC AUTOMOTIVE TEST CENT TIANJIN CO LTD
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