Oil film compensation process when fuel oil injection

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

Inactive Publication Date: 2009-07-29
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 co...

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  • Oil film compensation process when fuel oil injection

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Embodiment Construction

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

[0018] First introduce the calibration and calibration data table. Calibration, the English expression is Calibration, which means calibration. An engine cannot be matched to only one vehicle type, and different vehicle types 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 achieves Different performance is achieved through calibration. The main contents of calibration include: fuel injection quantity, ignition timing, electronic throttle opening, idle speed control valve duty cycle, exhaust gas circulation, turbocharger bleed valve opening timing and ot...

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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 volume. The fuel injection timing control is to control the time at which the engine starts to inject fuel, and the fuel injection volume control is to control how much fuel the engine should inject each time. The engine's control of the fuel injection volume is mainly to determine the basic volume based on the intake air volume and speed detected by the air flow meter, and then modify it according to the coolant temperature, intake air temperature, throttle opening, battery voltage and other parameters, and finally calculate the injection volume. Oil time. [0003] In the calculation of the fuel injection time correction value, the electronic control injection at home and abroad ignores the infl...

Claims

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Application Information

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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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