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A library of actual road driving conditions and its construction method

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: 2021-10-15
CHINA AUTOMOTIVE TECH & RES CENT +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A library of actual road driving conditions and its construction method
  • A library of actual road driving conditions and its construction method
  • A library of actual road driving conditions and its construction method

Examples

Experimental program
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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

Transplanting the RDE test to the hub laboratory or powertrain laboratory to form RDE calibration technology is of great significance for improving the development and calibration capabilities of enterprises and reducing the cost and cycle of RDE calibration. Aiming at the uncontrollable boundary conditions of the existing RDE test, the high cost and long period of enterprise compliance, the present invention proposes an actual road driving condition library and construction method based on large traffic volume data, actual vehicle operation data and actual RDE test data , the operating condition library is used to construct the cycle operating conditions for testing vehicle emissions. The cycle operating conditions include three parts: basic operating conditions, intense driving operating conditions and high emission operating conditions. When constructing intense driving conditions, the reference value used includes the relative positive acceleration corresponding to the 95% quantile point in the average speed-relative positive acceleration statistical curve. When constructing high-emission conditions, the data set used includes RDE test data, and when constructing high-emission conditions, the reference values ​​used include specific emission values ​​calculated from 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 Patents(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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