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Method for detecting fuel consumption of vehicle in transient road-test standard state

A technology of fuel consumption and detection method, which is applied in the direction of vehicle testing, relative volume flow measurement, measuring device, etc., to achieve the effect of high accuracy

Inactive Publication Date: 2013-05-22
GUANGDONG COMM POLYTECHNIC
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

The invention patent application "Vehicle Constant Speed ​​Road Test Standard State Fuel Consumption Correction Method" only solves the problem of fuel consumption correction under constant speed conditions. Fuel consumption under environmental conditions, the unified detection and evaluation of fuel consumption, there are many defects and gaps in the existing technology

Method used

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Embodiment Construction

[0018] The vehicle transient road test standard state fuel consumption detection method of the present invention is a method for correcting the fuel consumption detected by the four working conditions of idling, acceleration, constant speed and deceleration of the vehicle in the transient road test environment to a standard The method of environmental state fuel consumption, the vehicle transient road test load and engine load are calibrated in the standard environmental state for fuel consumption detection and evaluation, in which the road test obtains the total driving resistance RT of the vehicle at each speed point, and the driving resistance correction The coefficient K value, the road test measures the fuel consumption in each time interval △t as △Q, calculates the fuel consumption rate δ of the engine unit power in the standard environment state, and corrects it in the four working conditions of idling speed, constant speed, acceleration and deceleration respectively. Fu...

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Abstract

The invention discloses a method for detecting the fuel consumption of a vehicle in a transient road-test standard state. The method is characterized in that both a transient road-test load of the vehicle and a load of an engine are corrected so that the fuel consumption of the transient road-test load of the vehicle and the fuel consumption of the load of the engine can be detected and evaluated in a standard environmental state, the fuel consumption Delta Q within various time intervals Delta t are measured in a road test, idle-speed, acceleration, constant-speed and deceleration conditions are respectively corrected by the aid of a road-test load coefficient and an engine power correction coefficient to obtain the fuel consumption Delta Qb in various standard environmental states of the conditions, and the Delta Qb of a total time interval under each condition in a full detection procedure is accumulated to obtain the detected fuel consumption Qb0 of the vehicle in the transient road-test standard state. The method has the advantages of high accuracy, speediness, simplicity and the like.

Description

technical field [0001] The invention relates to the technical field of vehicle performance road test detection methods, in particular to a vehicle transient road test standard fuel consumption detection method. After the fuel consumption is detected in working conditions, constant speed working conditions and deceleration working conditions, the fuel consumption measured in the road test environment is corrected to the fuel consumption in the standard environment, so that the fuel consumption of different models Quantities can be compared and evaluated under uniform reference state conditions. Background technique [0002] There are two methods for detecting fuel consumption in existing vehicle road tests. The first one is JT711-2008 "Limits and Measurement Methods of Fuel Consumption of Commercial Passenger Vehicles" and JT719-2008 "Limits and Measurement Methods of Fuel Consumption of Commercial Trucks", It belongs to constant speed road test to detect fuel consumption; t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F9/02G01M17/007
Inventor 李军吴明刘越琪
Owner GUANGDONG COMM POLYTECHNIC
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