Automobile constant speed engine given load detection method

Abstract

The invention relates to an automobile constant speed engine specified load detection method, which defines the rotating speed range of the automobile speed under the engine rated torque and the full-load minimum fuel consumption rate when the high speed gear is engaged in a gearbox on a chassis dynamometer by an automobile, after the test and the calculation, the load constant force value of a power absorbing device of the engine defined load is determined at the defined automobile speed point, when the load working condition is defined by the engine delta rated torque, the load is controlled by the constant force of the power absorbing device, the accelerator is adjusted and stabilized, and the vehicular dynamic property and fuel economy are detected in the constant speed at the defined automobile speed point, the method has good accuracy, validity and operability, meanwhile, the method can avoid the damages to the in-use vehicles or engines with worse technology condition, thereby increasing the detection safety.

Description

technical field [0001] This method is to put the car on the chassis dynamometer, put the gearbox in the high-speed gear, and the system loads the vehicle engine with a constant force load of the specified δ percentage rated torque, adjusts and stabilizes the accelerator pedal at the specified speed and constant speed to detect the fuel economy of the car or The power performance belongs to the technical field of vehicle bench test fuel economy or power performance detection method. Background technique [0002] There are two methods for testing the fuel economy of vehicles in use: one is the full-quality bench test of the vehicle to simulate the load of the road test. Under the condition of a small load of the engine at the position of the accelerator pedal at the specified speed and the position of the accelerator pedal is about 40% of the full load, the vehicle is tested. For the fuel consumption per kilometer, this method has a large comprehensive error in bench test simu...

AI Technical Summary

Problems solved by technology

[0002] There are two methods for testing the fuel economy of vehicles in use: one is the full-quality bench test of the vehicle to simulate the load of the road test. Under the condition of a small load of the engine at the position of the accelerator pedal at the specified speed and the position of the accelerator pedal is about 40% of the full load, the vehicle is tested. The fuel consumption per kilometer, this method has a large comprehensive error in bench test simulation road test load, and the sensitivity to load error and speed error is too high, so the accuracy of fuel economy detection cannot be guaranteed.

The other is the detection method of fuel consumption rate at constant speed and full load of automobiles, see the invention patent application number 200910205135.0 "Detection method of fuel consumption rate of automobiles at constant speed and full load". The minimum fuel consumption rate of the load, the defect is that for some in-use vehicles with excessive fuel supply of high-pressure fuel injection pumps or poor technical conditions, a longer detection may damage the vehicle or engine

[0003] Existing vehicle power detection is performed under the condition of full engine load. Although the power detection time is relatively short, it is still possible to damage the vehicle or engine in use under the full load of the larger engine rated torque.

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