Engine fuel injection control method and engine fuel injection electronic control device

An electronic control device and fuel injection technology, applied in engine control, fuel injection control, machine/engine, etc., can solve problems such as cost increase and achieve the effect of reducing oil pressure pulsation

Active Publication Date: 2013-12-25
UNITED AUTOMOTIVE ELECTRONICS SYST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above methods will lead to an increase in cost

Method used

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  • Engine fuel injection control method and engine fuel injection electronic control device
  • Engine fuel injection control method and engine fuel injection electronic control device
  • Engine fuel injection control method and engine fuel injection electronic control device

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Embodiment Construction

[0048] Such as figure 2 , assuming that the new pressure wave y for the next injection 10 and the previous pressure wave y emitted back 20 are generated by wave sources S1 and S2 respectively, and their vibration expressions are:

[0049]

[0050]

[0051] The vibrations caused by the two waves propagating to point P are:

[0052]

[0053]

[0054] A 1 is S 1 Amplitude of vibration induced at point P, A 2 is S 2 The vibration amplitude caused by point P, the vibration at point P is the synthesis of vibrations in the same direction and at the same frequency. The resultant vibration at point P is:

[0055]

[0056] in:

[0057]

[0058]

[0059] λ is the wavelength, that is, the length of one cycle of wave propagation.

[0060] From the above deduction, it can be obtained that the amplitude of the wave after the synthesis of two waves of the same frequency depends on That is, the fluctuation range of the oil pressure in the oil rail depends on ...

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Abstract

The invention discloses an engine fuel injection control method which comprises the following steps of: firstly establishing an oil pressure pulsation working condition table; then obtaining the fuel injection frequency f1 of a current engine according to the working condition of the current engine, and judging whether the working condition of the current engine is the working condition of the oil pressure pulsation in the oil pressure pulsation working condition table, if yes, driving oil injection voltage signals are alternately output to a fuel injector of each cylinder of the engine according to sequence at two time intervals of a first time interval t1 and a second time interval t2, wherein t1 is not equal to t2. The invention also discloses an engine fuel injection electronic control device. The engine fuel injection control method and the engine fuel injection electronic control device can effectively reduce the oil pressure pulsation of the oil rail in the engine and have low cost.

Description

technical field [0001] The invention relates to engine technology, in particular to an engine fuel injection control method and an engine fuel injection electronic control device. Background technique [0002] With the increasing depletion of energy and the increasing awareness of environmental protection, people's requirements for automobile technology continue to increase. The use of electronic fuel injection control system on the engine, due to the flexible control method, can realize the precise control of the engine air-fuel ratio, and has become the standard configuration of passenger cars. [0003] The electronic fuel injection control system takes an electronic control unit (ECU) as the control center, uses various sensors installed on different parts of the engine to measure various operating parameters of the engine, and controls the engine according to the control program set in the ECU. The fuel injector precisely controls the fuel injection quantity, so that th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/40
Inventor 刘浩龙杨涛汪学明
Owner UNITED AUTOMOTIVE ELECTRONICS SYST
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