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Control system for marine medium-speed micro-jet ignition type dual-fuel engine

A dual-fuel engine and control system technology, applied in engine control, fuel injection control, machine/engine, etc., to achieve enhanced adaptability, easy calibration, and smooth transition

Active Publication Date: 2016-09-28
WUHAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The domestic marine micro-injection ignition dual-fuel engine is in the stage of engineering development, and there is no corresponding marine micro-injection ignition dual-fuel engine control system

Method used

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  • Control system for marine medium-speed micro-jet ignition type dual-fuel engine
  • Control system for marine medium-speed micro-jet ignition type dual-fuel engine
  • Control system for marine medium-speed micro-jet ignition type dual-fuel engine

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Embodiment Construction

[0029] The marine medium-speed micro-injection pilot dual-fuel engine control system provided by the present invention is suitable for the marine micro-injection pilot dual-fuel engine that injects natural gas into the intake manifold and injects high-pressure common rail pilot fuel in the cylinder. Real-time cylinder pressure and vibration signals are used to extract the combustion situation of each cylinder to achieve air-fuel ratio and knock control. Set the floating target speed according to the power characteristics of the mixed fuel and its air-fuel ratio, and according to the pressure of the supercharged air, to realize the rapid adjustment of the fuel switching process and optimize the switching effect. In the process of fuel mode switching, a target speed based on the pressure of the charge air is adopted, so that the speed fluctuation during the fast switching process is low and no knocking or misfire occurs. The variable air-fuel ratio of each cylinder and the micro-...

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Abstract

The invention discloses a control system for a marine medium-speed micro-jet ignition type dual-fuel engine. The control system consists of an engine operation monitoring unit, a safety protection unit, a fuel jetting and speed-regulating control unit and a parameter modifying unit which are mounted in a control box, wherein each unit is connected by a CAN redundant bus, so that data interaction and logic parameter modification of the corresponding unit are realized, and parameter interaction is displayed through a modbus bus and a man-machine interaction interface. The system can realize multi-time jetting control and can stop certain channel jetting mode; the same control unit is adopted to realize fuel supply control of the engine, so that synchronous and precise control on a fuel mode switching process is convenient, stable transition of the engine is realized, and operation parameters of the dual-fuel engine are optimized.

Description

Technical field [0001] The invention relates to a marine medium-speed micro-injection pilot dual-fuel (LNG / diesel) engine control system, in particular to a controller that realizes fuel injection, speed regulation and engine management during engine operation. Background technique [0002] With the continuous improvement of the IMO's emission requirements for marine engines, marine micro-injection pilot type (in natural gas mode, about 1% of high-pressure common rail pilot diesel fuel is injected to achieve in-cylinder ignition) medium and low speed natural gas / diesel dual Fuel engines have begun to be used to improve fuel economy and achieve substantial emissions reductions. China is committed to the engineering development of marine medium-speed dual-fuel engines. The dual-fuel engine gas mode uses intake manifold injection (quasi-cylinder) natural gas and in-cylinder micro-injection ignition mode; diesel engine mode uses speed regulation The working mode of the plunger pump ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/00F02D41/38
Inventor 杨建国钱正彦余永华王勤鹏
Owner WUHAN UNIV OF TECH
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