A self-learning control method for electronic throttle valve feature point position
An electronic throttle valve and control method technology, applied in electrical control, engine control, fuel injection control and other directions, can solve the problems of low learning accuracy of feature point position, imprecise learning process, one-sided feature point position, etc., and achieve the feature point position Comprehensive, improving accuracy, preventing the effect of excessive duty cycle
Active Publication Date: 2020-07-03
DONGFENG MOTOR CORP HUBEI
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Problems solved by technology
In the prior art, when learning feature points, the feature point positions used are relatively one-sided, and the learning process of each feature point is not rigorous enough, resulting in low learning accuracy of feature point positions and large deviations
Method used
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[0081] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments to facilitate a clear understanding of the present invention, but they do not limit the present invention.
[0082] The throttle feature point position self-learning of the present invention includes mechanical bottom dead center position self-learning, mechanical top dead point self-learning, and throttle natural position self-learning. These three feature points can be self-learned in any order, for ease of description In the following, the order of mechanical bottom dead center position-throttle natural position-mechanical top dead center is used as an example for self-learning description.
[0083] In this embodiment
[0084] The engine controller ECU will adjust the motor request PWM duty cycle (duty cycle for short) according to the target throttle opening, and control the motor to change the actual throttle opening to follow the target ope...
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The invention relates to the technical field of engine control, in particular to a self-learning control method for feature point positions of an electronic throttle valve. The self-learning control method comprises the steps that a mechanical bottom dead center position, a mechanical top dead center position and a throttle valve natural position serve as the feature point positions of the electronic throttle valve for self-positioning, and the mechanical bottom dead center position, the mechanical top dead center position and the throttle valve natural position are self-learned according to any sequential order; and when a certain throttle valve feature point position is learned successfully, the currently learned feature point positions and the previously stored feature point positions are subjected to weighing calculation, and the calculated new feature point positions serve as latest data to be updated and stored. The mechanical bottom dead center position, the mechanical top deadcenter position and the throttle valve natural position serve as the feature point positions of the electronic throttle valve for self-positioning, the feature point positions are more comprehensive,and thus the precision of any position of the throttle valve is improved.
Description
Technical field [0001] The invention relates to the technical field of engine control, in particular to a self-learning control method for the position of characteristic points of an electronic throttle. Background technique [0002] The electronic throttle is the most basic way for gasoline engines to control the engine power. The throttle effect of the throttle is used to make the engine achieve the ideal engine intake efficiency under different operating conditions. It is matched with the engine fuel injection and ignition to make the engine burn according to demand. Provide the required power and torque for the engine. The stability and accuracy of throttle control is the key to accurately controlling the amount of fresh air burned by the engine, so as to ensure the smooth and precise control of engine speed, torque and power. [0003] Since the engine has strict requirements on power, economy, and emissions, this requires very precise control of the electronic throttle. Howe...
Claims
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IPC IPC(8): F02D41/00F02D41/24
Inventor 秦龙王俊鹏田丰民
Owner DONGFENG MOTOR CORP HUBEI