Electronic control system for dual-fuel engine

Abstract

The invention relates to engine control technologies, in particular to an electronic control system and a control method for a diesel and natural gas hybrid dual-fuel engine. The electronic control system comprises CNG (compressed natural gas) cylinders, gas cylinder pressure gauges, a regulating valve, a natural gas heater, a high-pressure stop valve, a pressure reducing valve, a linear load valve, a stepper motor valve, an air inlet, a mixer, the engine, a fuel capacity limiting electromagnetic valve, a gas inlet pressure sensor, a gas inlet temperature sensor, an engine rotation speed sensor and an electronic control unit. The electronic control system and the control method have the advantages that the natural gas capacity and the ignition fuel capacity can be flexibly controlled by the electronic control system for the dual-fuel engine, and the dual-fuel engine has good emission indexes and can work by the aid of pure diesel during starting and idling; instructions can be emitted by the control system for the engine when the rotation speed of the engine is higher than a certain set value, so that the engine can be automatically switched to work in a dual-fuel working mode.

Description

technical field [0001] The invention relates to engine control technology, in particular to an engine electric control system using diesel and natural gas as dual fuels. Background technique [0002] With the enhancement of people's awareness of environmental protection, the problem of automobile exhaust emissions has been criticized more and more by people. Traditional high-emission diesel engines are facing the fate of being eliminated, and many companies that produce diesel engines have to develop low-emission diesel engines. In addition, with the increasingly tense oil resources, the world's fuel prices have soared again and again, and my country's oil prices have also risen again and again. The scientific development and mature application of clean energy diesel engines represented by natural gas can effectively reduce the use cost of heavy trucks. , to alleviate the shortage of energy, and to solve the problems of emission pollution. [0003] In the existing dual-fuel...

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Problems solved by technology

[0003] In the existing dual-fuel control technology, a natural gas control system is usually added on the basis of the diesel engine and diesel control system. However, most of them have the problem that the value of the amount of ignited diesel cannot be flexibly controlled, the emission index is relatively high, and it does not meet the requirements of environmental protection. Require

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