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Method and device for controlling fuel injector

A fuel injector and equipment technology, applied in electrical control, mechanical equipment, engine control and other directions, can solve problems affecting engine power, economy and emission performance, and achieve the effect of precise control

Active Publication Date: 2014-12-24
WEICHAI POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, if the injection advance angle of the injector and the power-on time are not controlled, the power, economy and emission performance of the engine will be affected

Method used

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  • Method and device for controlling fuel injector
  • Method and device for controlling fuel injector
  • Method and device for controlling fuel injector

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Embodiment Construction

[0031] Various embodiments of the present invention aim at the situation that the opening time of the fuel injector changes in the case of multiple injections or aging, and measure the magnitude of the actual boost voltage or current loaded on the solenoid valve and the actual boost time to reach it, according to the measurement Estimate the response time offset of the solenoid valve (that is, the offset of the power-on time) based on the actual boost time and the calibrated boost time, and then adjust the fuel injection advance angle and the boost angle in the ECU data according to the response time offset. The electrical time is compensated or corrected, so as to realize the precise control of the fuel quantity of each injection.

[0032] After generally introducing the present invention, various embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0033] figure 1 A flowchart of a method 100 for controlling a ...

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Abstract

The invention provides a method and a device for controlling a fuel injector. The method comprises the following steps: measuring the actual pressurization time during which the injector reaches pressurization voltage or pressurization current; calculating a power-up time offset according to a calibrated pressurization time and the actual pressurization time; converting the power-up time offset to an angular advance offset; and calculating the actual angular advance based on the calibrated angular advance and the angular advance offset. By using the method and device of invention, the calibrated work load can be reduced and precise control on the injection fuel quantities of the fuel injector can be realized, thus the performance of the engine can be improved.

Description

technical field [0001] The present invention relates generally to fuel injectors, and more particularly, the present invention relates to methods and apparatus for controlling fuel injectors. Background technique [0002] A fuel injector is a precision device used to control the amount of fuel injected. Usually, after the solenoid valve of the fuel injector is energized, the solenoid valve does not open immediately, but there is a certain lag. The lag time is related to the rising speed of the boost voltage or current that drives the solenoid valve, and the rising speed is related to electronic devices such as the resistance and inductance of the fuel injector. [0003] In order to eliminate the above hysteresis as far as possible, the usual method is to directly regard the power-on time of the fuel injector as the fuel injection time, that is, the period from the start of applying the driving voltage to the stop of the driving voltage to the fuel injector Considered as in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/30
Inventor 孙少军佟德辉李大明徐文俊刘兴义桑海浪
Owner WEICHAI POWER CO LTD