Torque correction method and related device for air compressor
An air compressor and negative correlation technology, applied in the field of vehicle engineering, can solve the problems of inaccurate torque acquisition and inaccurate judgment of engine output torque.
Active Publication Date: 2022-04-26
WEICHAI POWER CO LTD
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Problems solved by technology
[0004] In order to solve the above technical problems, this application provides an air compressor torque correction method and related devices to solve the problem that the gearbox is inaccurate in judging the output torque of the engine due to the inaccurate acquisition of the torque of the air compressor of the engine. question
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[0046]As mentioned in the background technology, in the prior art, when the motor vehicle is started after being placed for a long time, due to the leakage of the connectors or the gas cylinders of the brake air circuit system, after the engine is started, the early work load of the air compressor is relatively large. At this time, if the torque of the air compressor is simply obtained based on the engine speed, there will be a large difference between the acquired torque of the air compressor and the actual torque, resulting in the calculation of the engine torque obtained based on the obtained air compressor and the internal torque of the engine. The output torque differs greatly from the actual value. In this case, the gearbox performs gear shifting or start-up control based on the engine output torque with a large error from the actual value. Have a negative impact.
[0047] In view of this, an embodiment of the present application provides a method for correcting the torq...
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The present application discloses an air compressor torque correction method and related devices, wherein the air compressor torque correction method not only obtains the basic calibration torque of the air compressor according to the engine speed, but also according to the start time of the engine, The correction coefficient corresponding to the start-up time is obtained, and the correction torque of the air compressor is obtained according to the engine speed, and finally the basic calibration torque of the air compressor, the correction torque and the correction coefficient of the air compressor are used, according to the first preset formula, Calculate and obtain the target torque of the air compressor, so that the final target torque of the air compressor is closer to the actual torque of the air compressor, avoiding the situation that the gearbox ECU cannot accurately obtain the output torque of the air compressor due to the long-term parking of the motor vehicle , to solve the problem that the gearbox is inaccurate in judging the output torque of the engine due to the inaccurate acquisition of the torque of the air compressor of the engine.
Description
technical field [0001] The present application relates to the technical field of vehicle engineering, and more specifically, relates to an air compressor torque correction method and a related device. Background technique [0002] In the actual use of the whole vehicle, if the engine is parked for a long time, due to the leakage of the connectors of the brake air circuit system or the air cylinder, after the engine is started, the early work load of the air compressor is relatively large, and after a period of time, the air compressor will be pumped. After that, when the air pressure of the gas cylinder is sufficient, the air compressor will be unloaded accordingly, and the corresponding torque will be less and more at this time. As a result, the current method of only calibrating the fixed torque of the air compressor cannot accurately reflect the actual torque of the air compressor. [0003] In a complete vehicle matched with an AMT (Automated Mechanical Transmission, elec...
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IPC IPC(8): F04B49/06
CPCF04B49/065
Inventor 侯健鹏刘加超毕世高
Owner WEICHAI POWER CO LTD