A Soft Seating Control Method for Electronically Controlled Throttle Valve

A control method and throttle valve technology, applied in electrical control, engine control, fuel injection control, etc., can solve problems affecting the service life of actuators, impact deformation of components, etc., and achieve the effect of avoiding mechanical impact and protecting mechanical structures

Active Publication Date: 2022-03-25
FAW JIEFANG AUTOMOTIVE CO
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of driving, it is inevitable that the throttle valve will transition from nearly fully closed to fully open. At this time, if there is no soft seat control, the throttle valve actuator will cause related components due to excessive impulse. The impact deformation seriously affects the service life of the actuator

Method used

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  • A Soft Seating Control Method for Electronically Controlled Throttle Valve
  • A Soft Seating Control Method for Electronically Controlled Throttle Valve

Examples

Experimental program
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Effect test

Embodiment Construction

[0021] The throttle valve limit setting position function includes two sub-functions, the filter limit function and the hold limit function, and the hold limit function has a higher priority than the filter limit function.

[0022] Among them, the filter limit function is divided into three modes:

[0023] Unlimited mode: When exit saturation limit mode position threshold THR_LIM_EXIT_POS_SATU ≥ throttle valve original set position THR_POST (90%) ≥ exit zero limit mode position threshold THR_LIM_EXIT_POS_ZERO (15%), throttle limit set position is directly equal to original Set position (THR_SET = THR_POST).

[0024] Return-to-zero limit mode: When the original set position of the throttle valve is less than or equal to the position threshold of entering the return-to-zero limit mode (THR_POST ≤ THR_LIM_ENTER_POS_ZERO(9%)), low-pass filtering is performed on the original set position of the throttle valve to make the set position change. After it is smooth and smooth, it is ou...

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Abstract

The invention discloses a soft seat control method for an electronically controlled throttle valve, which belongs to the field of automotive electronic control. It is aimed at the drive control of the existing hardware H bridge. The operating condition is close to the transition from fully closed to fully open. If there is no soft seat control at this time, the throttle valve actuator will cause impact deformation of related components due to excessive impulse, which will seriously affect the service life of the actuator. In the present invention, by judging the restricting mode of the throttle valve setting position, reasonably selecting the duty cycle threshold value, performing restrictive processing on the rough throttle valve setting position original signal, and using the restrictive setting position as the throttle valve position control The ultimate goal is to effectively avoid the mechanical impact of the throttle valve and other problems, and achieve the purpose of protecting the mechanical structure of the throttle valve.

Description

technical field [0001] The invention belongs to the field of automobile electronic control. Background technique [0002] As the diesel engine emission standard moves towards the National VI stage, while the steady-state emissions are greatly reduced, the new emission regulations have also made more stringent requirements for the emission of dynamic conditions. It is necessary to maintain a suitable exhaust temperature without exception, otherwise it will seriously affect the efficiency of after-treatment. As the key actuator to control the air-fuel ratio and improve the exhaust temperature, the electronically controlled throttle valve has been widely used here. [0003] In order to control the cost of the actuator, the widely used throttle valve is driven by a brushed or brushless motor, and the drive control is performed by means of a hardware H-bridge. In the process of driving, it is inevitable that the throttle valve will transition from close to fully closed to fully...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/00
Inventor 陈铁张鹏王明卿李凡杰杨茜
Owner FAW JIEFANG AUTOMOTIVE CO
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