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Oil film compensation process when fuel oil injection

A technology of fuel injection and compensation method, applied in fuel injection control, engine control, machine/engine, etc., can solve the problems of high fuel consumption and unstable acceleration and deceleration performance of automobiles

Inactive Publication Date: 2012-10-10
CHINA VAGON AUTOMOTIVES HLDG CO LTD
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Problems solved by technology

[0003] Among them, in the calculation of the correction value of fuel injection time, the electronic control injection at home and abroad has ignored the influence of the change of the oil film attached to the intake manifold on the actual fuel injection quantity of the engine, or has not formed an effective correction algorithm to control the oil film The correction amount of the compensation, and other fuel injection correction values ​​are modified, the result is: the fuel injection correction value cannot really reflect the changes in the driving state of the car, the acceleration and deceleration performance of the car is unstable, and the fuel consumption is high

Method used

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  • Oil film compensation process when fuel oil injection

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Embodiment Construction

[0017] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0018] First, a little introduction to calibration and calibration data sheets. Calibration, the English expression is Calibration, which means calibration. It is impossible for one engine to match only one model, and different models have different performance requirements: sports cars require high speed and high power, SUV models require low speed and high torque, ordinary cars require balanced performance, etc., one engine can achieve Different performance is achieved through calibration. The main content of the calibration includes: fuel injection quantity, ignition timing, electronic throttle opening, idle speed control valve duty cycle, exhaust gas circulation amou...

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Abstract

The invention discloses an oil film compensation method used in fuel oil injection. The method comprises the following steps: collecting air inflow signal and crankshaft rotating speed signal; confirming basic injecting time (TIB) of an engine according to the crankshaft rotating speed signal and the air inflow signal; judging that the engine is in sharp accelerating state or sharp decelerating state according to the TIB; inquiring a marking data table of the engine to obtain fast compensation amount and slow compensation amount of an intake manifold of the engine according to the state of the engine; and acquiring the oil film compensation value in the engine oil injection process according to the fast compensation amount and slow compensation amount of the intake manifold of the engine.The method can accurately compensate the oil injection amount by precisely calculating the oil film compensation value in fuel oil injection, thus greatly improving the power output performance in acceleration and deceleration, obtaining the optimal air-fuel ratio of an automobile in accelerating or decelerating working condition, and adjusting the running performance of the automobile by changing oil injection sum.

Description

technical field [0001] The invention relates to the field of engines, in particular to an oil film compensation method during fuel injection. Background technique [0002] Automobile engine fuel injection technology mainly refers to the control of fuel injection timing and fuel injection quantity. The fuel injection timing control is to control the moment when the engine starts to inject fuel, and the fuel injection quantity control is to control how much fuel the engine should inject each time. The control of the fuel injection quantity of the engine is mainly to determine the basic quantity according to the intake air quantity and rotational speed detected by the air flow meter, and then correct it according to the parameters such as coolant temperature, intake air temperature, throttle opening degree, battery voltage, etc., and finally calculate the injection quantity. oil time. [0003] Among them, in the calculation of the correction value of fuel injection time, elec...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/30F02D41/04F02D41/14
Inventor 李朝晖张步亮
Owner CHINA VAGON AUTOMOTIVES HLDG CO LTD
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