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Road test-simulated standard-state fuel consumption detection method based on bench test

A fuel consumption, standard state technology, applied in relative volume flow measurement, measuring device, liquid/fluid solid measurement, etc., can solve the problem that road test vehicle resistance is greatly affected by environmental parameters, without considering engine power and fuel consumption issues such as the impact of

Inactive Publication Date: 2011-02-02
中山市科奕汽车检测设备有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

(3) Road test vehicle resistance is greatly affected by environmental parameters
(4) The bench test did not consider the influence of environmental conditions on engine power and fuel consumption

Method used

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Examples

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Embodiment approach

[0020] (1) The instruction manual of the chassis dynamometer indicates that its equivalent inertia is 896kg. Find the moment of inertia L of the tire from the tire manual, kg.m 2 ; The equivalent moment of inertia of the measured tire is L / r 2 , kg, r is the tire radius m.

[0021] (2) The driving wheel drives on the chassis dynamometer drum, the power absorbing device is not loaded, and after the transmission is put into direct gear, increase the accelerator to make the vehicle speed exceed the maximum speed of 80km / h, which is about 5km / h, which is 85km / h. Finally, loosen the throttle and put in neutral gear, and use any of the free and loaded two-time sliding method, two constant force loading sliding method, two-time increasing and decreasing inertia sliding methods, or one-time sliding method to measure the vehicle and chassis in neutral gear. Resistance F at each speed point of the entire transmission system of the dynamometer 1 and the equivalent moment of inertia m ...

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Abstract

The invention relates to a road test-simulated standard-state fuel consumption detection method based on a bench test, which comprises the following steps: calculating or determining the system resistance F2 of an automobile at each specified point in a neutral-gear road test in case of zero load or full load, performing a zero-load bench test on the automobile to detect the resistance F1 of the entire transmission system of the neutral-gear automobile and a chassis dynamometer at each specified point, correcting F2 with a power correction factor into an engine driving force F2D under the current bench test environmental condition, calculating the loading force F3 of a power absorption device on the surface of a drum according to a formula F3=F2D-F1, loading the force constantly, and enabling a driver to adjust and stabilize the position of the accelerator pedal to detect the fuel consumption at a constant speed. When repeated tests are required for optimizing the fuel consumption design of the automobile, the bench test can be repeated as long as the road test is performed once. The invention has the advantages of apparent test comparison, high accuracy and simple, fast and convenient operation.

Description

technical field [0001] The utility model relates to a method for detecting fuel consumption in a standard state of a bench test simulation road test, which is a method for detecting fuel consumption in a standard state by simulating a road test of an unloaded vehicle on a chassis dynamometer, and belongs to the technical field of vehicle performance detection methods. Background technique [0002] The measurement method for the type certification of fuel consumption of existing operating vehicles in my country is to use a fully loaded vehicle to detect the fuel consumption per 100 kilometers at a constant speed at a specified speed point, and calculate the comprehensive fuel consumption per 100 kilometers according to the weight coefficient. The in-use vehicle is based on the fuel consumption of the road test of the sample vehicle in the specified state, gear position and constant speed test at a speed point as a reference value. Background technical references: JT711-2008 "...

Claims

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Application Information

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IPC IPC(8): G01F9/00
Inventor 吴明
Owner 中山市科奕汽车检测设备有限公司
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