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Method and system for controlling oil injection according to wearing degree of oil injector

A technology of wear degree and fuel injector, which is applied in the direction of fuel injection control, electrical control, engine control, etc., can solve the problems of decreased reliability of the whole machine, shortened life of the whole machine, and increase of diesel engine power, so as to maintain power and improve reliability Effects on Sexuality and Lifespan

Active Publication Date: 2012-07-25
WEICHAI POWER CO LTD
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Problems solved by technology

[0004] However, the above-mentioned technical solution has the following technical problems: after the diesel engine is used for a period of time, the oil hole of the fuel injector will be worn accordingly, that is, the fuel injection volume of the fuel injector will increase within the unit power-on time
However, the ECU still controls the power supply time of the fuel injector according to the pre-stored power-on time MAP. When the fuel injector is worn out, fuel injection according to the set power-on time will inevitably cause an increase in the fuel injection volume, which will eventually lead to an increase in the power of the diesel engine. The reliability of the whole machine is reduced and the life of the whole machine is shortened

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  • Method and system for controlling oil injection according to wearing degree of oil injector
  • Method and system for controlling oil injection according to wearing degree of oil injector
  • Method and system for controlling oil injection according to wearing degree of oil injector

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specific Embodiment approach

[0046] Please refer to figure 2 , figure 2 It is a flow chart of another specific embodiment of the method for controlling fuel injection according to the degree of wear of the fuel injector provided by the present invention. This embodiment comprises the following steps:

[0047] S210) When the fuel injector is not worn, select a number of specific throttle openings, and obtain speed signals corresponding to each specific throttle opening at this time;

[0048] The difference from the above-mentioned embodiment is that in this embodiment, a number of specific throttle openings are selected in the calibration stage, and the specific throttle openings can be selected according to a certain rule, such as increasing by 5% intervals, of course, they can also be increased according to other ratios , such as 3%, 10%, etc. The storage unit can establish and store the MAP of each specific throttle opening and the corresponding speed signal.

[0049] S220) Obtain the current spee...

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Abstract

The invention discloses a method and a system for controlling oil injection according to a wearing degree of an oil injector. The disclosed method comprises the following steps: selecting a specific accelerator opening degree under an unworn state, obtaining and storing a corresponding speed signal; obtaining a current speed signal corresponding to the stored specific accelerator opening degree at the current state; comparing the current speed signal with the speed signal, obtaining a current wearing coefficient of the oil injector; and correcting the predetermined power-up time MAP (two-dimensional data map) according to the current wearing coefficient of the oil injector. The control method and the system can perform self-checking according to the predetermined data, and then correct the power-up time MAP after the wearing coefficient is analyzed out, and the oil injector is compensated in a way of self-checking and correction even that the oil injector is worn, so that the oil injector can inject oil according to the actually needed oil injection amount even the oil injector is worn, the power of the diesel engine is held, and the reliability and the service life of the whole device are enhanced.

Description

technical field [0001] The invention relates to the technical field of diesel engines, in particular to a method and system for controlling fuel injection according to the wear degree of fuel injectors. Background technique [0002] With the continuous improvement of domestic and international diesel engine emission regulations, electronically controlled diesel engines have become the main models for current and later development. [0003] The fuel injector is one of the important parts of the diesel engine, and its fuel injection volume is mainly controlled by the electronic control unit (ECU) of the diesel fuel injection system. In the actual use of diesel engines, the fuel injection volume of the fuel injector is different for different working conditions. Assuming that the fuel injection volume per unit time is constant, the different fuel injection volumes of the fuel injector are mainly determined by different power-on times. The power-on time is the power supply time...

Claims

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Application Information

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IPC IPC(8): F02D41/30F02D41/04
Inventor 韩峰黄国龙田新伟文志永徐贤发张晓琳
Owner WEICHAI POWER CO LTD
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