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A construction method of road cycle condition

A cycle condition and construction method technology, applied to the construction of road cycle conditions of hybrid vehicles, in the field of pure electric vehicles, can solve the problems that it is difficult to truly reflect the actual emission characteristics and fuel consumption characteristics

Active Publication Date: 2017-11-14
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is difficult to truly reflect the actual emission characteristics and fuel consumption characteristics of electric vehicles with the working conditions constructed for traditional vehicles, so it is necessary to construct cycle working conditions for electric vehicles

Method used

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  • A construction method of road cycle condition
  • A construction method of road cycle condition
  • A construction method of road cycle condition

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Embodiment Construction

[0018] Below in conjunction with the accompanying drawings, a method for constructing a road cycle working condition according to the present invention will be described separately according to the collection of vehicle road driving data, the processing and analysis of vehicle road driving data, and the construction process of the road cycle working condition:

[0019] 1. Vehicle road driving data collection test:

[0020] (1) Parameters of vehicle road driving data collection

[0021] The GPS / INS integrated navigation system is used to collect test data, and the collected parameters include: vehicle speed, acceleration, and altitude.

[0022] The traditional road driving data collection of vehicles mainly obtains the speed of the vehicle by reading the speed signal in the vehicle ABS module, and calculates the acceleration of the vehicle by making a difference between the speeds of adjacent sampling points. The disadvantage of the traditional measurement method is that the a...

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Abstract

At present, the road cycle conditions are all based on the analysis and construction of the road operation data of traditional fuel vehicles. Due to the characteristics of the powertrain, electric vehicles can be driven by the drive motor in the low-speed area, and the drive motor starts and stops quickly. Therefore, electric vehicles There is no idling working state of a traditional car. The present invention uses the GPS / INS integrated navigation system to carry out sufficient road operation data collection tests on electric vehicles, and proposes a method for determining speed thresholds and acceleration thresholds aimed at the operating characteristics of electric vehicles; The state division and attribution principle of the corresponding vehicle speed segment, as well as the evaluation criterion of the characteristic parameters of the vehicle driving data, and finally based on the relevant theory of the Markov chain, the construction process of the cycle condition is divided into the initial part, the middle part and the End part, thus completing the construction of urban road cycle conditions.

Description

technical field [0001] The invention belongs to the field of construction of road cycle working conditions of electric vehicles, and in particular relates to a construction method of road cycle working conditions of pure electric vehicles and hybrid vehicles. technical background [0002] The road cycle condition is a time-velocity history developed for a certain type of vehicle to represent the driving characteristics of the vehicle in a specific traffic environment (such as urban areas and expressways). It is an important basis for evaluating vehicle emission performance and detecting fuel consumption. It is an important parameter in the process of vehicle power matching and economic optimization. [0003] Judging from the currently available construction methods of working conditions, the construction of road cycle working conditions is mostly based on traditional fuel vehicles. Due to the structure and driving mode of its drive system, electric vehicles are very differe...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M17/007
Inventor 何洪文彭剑坤潘登范皓
Owner BEIJING INSTITUTE OF TECHNOLOGYGY