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Real road driving condition library and construction method thereof

A technology for driving conditions and actual roads, applied in the field of transportation, can solve problems such as shortage and high pressure on enterprises, and achieve good coverage and pertinence.

Active Publication Date: 2019-06-25
CHINA AUTOMOTIVE TECH & RES CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, my country lacks an RDE calibration cycle similar to RTS95, and enterprises are under great pressure

Method used

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  • Real road driving condition library and construction method thereof
  • Real road driving condition library and construction method thereof
  • Real road driving condition library and construction method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] In this embodiment, the test cycle is formed by combining the short-stroke segments in the cycle of the cycle, and the established cycle of the test is suitable for light vehicles. The data used when establishing the cycle includes actual road data and RDE (Real Driving Emission ) test data, when collecting actual road data, select a private car in a designated city, collect the running data of the vehicle through the data collection terminal (such as OBD) installed on the vehicle, and the data collection terminal sends the data to the working condition data through the GPRS network management platform.

[0017] In this embodiment, 70 private cars in 5 typical cities are selected, with a total of three-month driving data (cumulative mileage of 250,000 kilometers) as the vehicle operation data used when building the working condition library.

[0018] When determining the short-travel segments in the case library used to build the base case, the steps include:

[0019] ...

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Abstract

An RDE test is transplanted to a hub laboratory or a power assembly laboratory, and an RDE calibration technology is formed, which is of great significance for enhancement of an enterprise developmentcalibration capability and reduction of the RDE calibration cost and the cycle. In view of the problems of uncontrollable boundary conditions of the existing RDE test, high enterprise standard reaching cost, long cycle and the like, based on traffic volume big data, the actual vehicle running data and the real RDE test data, a real road driving condition library and a construction method thereofare put forward. The condition library is used for building a circulating condition for testing the vehicle emission, and the circulating condition comprises a basic condition, am intense driving condition and a high emission condition. When the intense driving condition is built, the used reference values comprise relative positive accelerations corresponding to 95% of percentiles in an average speed-relative positive acceleration counting curve. When the high emission condition is built, the used data set comprises RDE test data, and when the high emission condition is built, the used reference values comprise a specific emission value calculated by the RDE test data.

Description

technical field [0001] The invention belongs to the field of transportation, in particular to a library of actual road driving conditions and a construction method. Background technique [0002] Most of the existing vehicle energy consumption and emission tests are carried out on the rotating hub. Due to the limitations of the rotating hub test in simulating the actual road load and the setting of environmental parameters, the actual road emissions of the vehicle cannot be effectively controlled, and some companies even use Loopholes in the hub test for emissions cheating. In response to the above problems, Europe has proposed the RDE (Real Driving Emission) test, which is to measure the emissions of vehicles on the actual road. In view of the important role of RDE testing in avoiding corporate emissions cheating and reducing actual vehicle emissions, the sixth phase of my country's light vehicle emission standards also includes RDE testing in mandatory inspection requireme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M17/007
CPCG01M15/102
Inventor 吴志新刘昱李孟良李菁元闫峰胡熙吕赫于晗正男安晓盼汪洋
Owner CHINA AUTOMOTIVE TECH & RES CENT
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