Method for detecting dynamic performance of automobile based on loading and inertia

A loading force and dynamic technology, applied in the direction of measuring devices, vehicle testing, machine/structural component testing, etc., can solve problems such as damage to the engine, damage, difficulty in constant speed or constant force steady state detection, etc. The effect of detecting errors and improving detection accuracy

Inactive Publication Date: 2017-07-28
吴明
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AI Technical Summary

Problems solved by technology

[0002] Existing technology detects the power performance of automobile engine and usually adopts the bench test loading force method, and the automobile is on the chassis dynamometer, and the power absorbing device acts the loading force on the driving wheel of the automobile to detect the power in a steady state, which has the following disadvantages: (1) The gasoline engine has a high rated torque and speed, and the power absorbing device wi...

Method used

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Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0012] Taking the bench test of a passenger car with a manual gearbox as an example, the specific implementation of the method for testing the dynamics of the vehicle under load and inertia is described.

[0013] Input the vehicle type, tire diameter, number of driving wheels, engine type and engine displacement into the computer, and automatically obtain the equivalent inertia m of the rotating parts of the neutral power transmission system of the vehicle and the engine moment of inertia Ie. Determine the test equivalent inertia M of the chassis dynamometer and input it into the computer, automatically calculate the power correction coefficient according to the input or measured atmospheric pressure, temperature, and humidity of the road test environment, and input the engine rated power Pe or engine rated torque power Pm.

[0014] Turn off the air conditioner on the chassis dynamometer of a passenger car, and put on the third gear of the gearbox. The engine of this passenger ...

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Abstract

The invention provides a method for detecting dynamic performance of an automobile based on loading and inertia. An automobile is arranged on a chassis power measurement machine with quite big equivalent inertia; a power absorption device loads with constant current or constant force; the loading force is smaller than the driving force of a driving wheel; and the equivalent inertia M of the chassis power measurement machine, the equivalent inertia m of a rotation piece of an automobile neutral position power transmission system and the rotation inertia Ie of an engine are combined to server as loading load, so instantaneous power Pca of the driving wheel and the inertia power Pja of the engine at the rated torque rotation point na of the engine are detected. When the automobile is idling, the resistance power Pha of a vehicle wheel roller system during idling sliding at the same speed point is measured, loss power Pf of engine accessories at the rotation speed point na is estimated, and the power at the standard environment state of the corrected Pca+Pja+Pha+Pf is the engine rated torque power.

Description

technical field [0001] Loading and inertia detection method of automobile dynamics is a method of testing various types of automobiles on a chassis dynamometer with a relatively large equivalent inertia, using the loading force of the power absorbing device and the inertia of the bench as the load, and testing the instantaneous power of the rated torque point of the engine in a bench test A method belongs to the technical field of automobile performance detection methods. Background technique [0002] Existing technology detects the power performance of automobile engine and usually adopts the bench test loading force method, and the automobile is on the chassis dynamometer, and the power absorbing device acts the loading force on the driving wheel of the automobile to detect the power in a steady state, which has the following disadvantages: (1) The rated torque and rotational speed of the gasoline engine are relatively high, and the power absorbing device will generate an ...

Claims

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Application Information

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IPC IPC(8): G01M17/007
CPCG01M17/007
Inventor 吴明
Owner 吴明
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