Online engine output torque testing and analyzing method

Abstract

The invention relates to an online engine output torque testing and analyzing method. The online engine output torque testing and analyzing method is characterized by comprising the steps of: confirming the state of a whole vehicle; arranging and debugging an engine pedestal; obtaining an auxiliary analysis parameter of engine output torque; setting an analysis MAP of the engine output torque; testing the working condition of the whole vehicle; and performing online analysis of the engine output torque in the working condition of the whole vehicle. By means of the online engine output torque testing and analyzing method disclosed by the invention, the engine output torque in the actual operating condition of the whole vehicle can be tested and analyzed in real time; and thus, basis is provided for engine torque monitoring, calibration control and performance analysis in the working condition of the whole vehicle.

Description

technical field [0001] The invention relates to an engine performance test, in particular to an online test and analysis method for an engine output torque. Background technique [0002] Engine output torque is one of the key performance parameters of the engine, which directly affects the power performance of the vehicle, and its control strategy and precision will have an impact on fuel economy. According to the output torque of the engine, the effective thermal efficiency of the engine can be calculated and analyzed; combined with the output torque of the transmission, the efficiency of the transmission can be analyzed; combined with the performance parameters of subsystems such as engine cooling and lubrication, the transmission and consumption of fuel from the fuel tank to the wheels through different subsystems and components can be analyzed globally , that is, the energy flow distribution. Therefore, it is very important to test the output torque of the engine under ...

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Problems solved by technology

[0003] Different from the torque test on the engine bench, it can be tested by the engine bench dynamometer, and also different from ordinary temperature, pressure, flow and other parameters, which can be tested with low-cost and simple sensors, which is suitable for the whole vehicle working condition The lower engine torque sensor is expensive, the calibration cost is high, and the layout is difficult, which makes it difficult to perform real-time testing and analysis of the engine output torque under the actual operating conditions of the vehicle

In addition, for the engine with developed ECU, the method of using INCA equipment to obtain the EMS engine torque will have a large error due to the difference in the accuracy of the engine torque model calibration. For the engine without the developed ECU, the engine output torque cannot be obtained, resulting in the inability to develop the entire vehicle. Analysis of engine effective thermal efficiency, transmission efficiency and vehicle energy flow distribution under operating conditions

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