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Method and device for controlling an engine

A control method and engine technology, applied in the field of control, can solve the problems of low engine acceleration performance, poor engine explosive force, slow propagation of combustion flame, etc.

Active Publication Date: 2016-08-10
WEICHAI POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the inherent characteristics of natural gas itself, its combustion flame speed spreads slowly, and the explosive power of the engine is worse than that of the diesel fuel mode, so that the acceleration performance of the engine in the dual fuel mode is significantly lower than that in the pure diesel mode.

Method used

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  • Method and device for controlling an engine
  • Method and device for controlling an engine
  • Method and device for controlling an engine

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Embodiment Construction

[0046] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0047] see figure 1 , showing a flow chart of the engine control method of the present invention, which may include:

[0048] Step 101, when the engine is in the dual-fuel mode, it is judged whether the operating conditions of the engine change, and the operating conditions include steady-state operating conditions and acceleration operating conditions.

[0049] The solution of the present invention is mainly aimed at dual-fuel electronically controlled engin...

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Abstract

The present invention provides a method and device for controlling an engine. The method includes: when the engine is in a dual-fuel mode, judging whether the working conditions of the engine change, and the working conditions include steady-state working conditions and acceleration working conditions; if the working conditions If the condition changes, the control will switch the gas substitution rate corresponding to the current working condition to the gas substitution rate corresponding to the changed working condition; use the gas substitution rate corresponding to the changed working condition to calculate the amount of gas and diesel, and follow the The amount of gas and diesel controls engine operation. In this way, the engine can output torque in time to meet the changing demands of the current working conditions and improve engine performance.

Description

technical field [0001] The invention relates to the control field, in particular to an engine control method and device. Background technique [0002] The dual-fuel electronically controlled engine has two modes of pure diesel and dual-fuel, and can switch between these two modes. In the pure diesel mode, the engine uses diesel as the entire fuel, and in the dual-fuel mode, the engine uses a small amount of diesel as the ignition and gas as the main fuel. [0003] In general, gas is supplied by intake pipe or intake manifold injection, and diesel is supplied by in-cylinder direct injection (diesel is directly injected into the engine cylinder through a high-pressure fuel system). Due to the inherent characteristics of natural gas itself, its combustion flame speed spreads slowly, and the explosive power of the engine is worse than that of the diesel fuel mode, so that the acceleration performance of the engine in dual fuel mode is significantly lower than that in pure diese...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D19/08
Inventor 李少佳任宪丰刘栋李明周飞章
Owner WEICHAI POWER CO LTD