A Single Fuel Supply System Applicable to Pre-chamber Natural Gas Engine

Abstract

The invention aims to provide a single fuel supply system suitable for a precombustion chamber type natural gas engine. The single fuel supply system suitable for the precombustion chamber type natural gas engine comprises a gas collecting cavity, a natural gas storage bottle, a compressing cylinder and a working cylinder, wherein the working cylinder comprises a precombustion chamber and a main combustion chamber; the precombustion chamber comprises a precombustion chamber inner wall and a precombustion chamber outer wall; the precombustion chamber outer wall is positioned on the outside of the precombustion chamber inner wall; the main combustion chamber is positioned on the outside of the precombustion chamber outer wall; a natural gas nozzle and a sparking plug are arranged in the precombustion chamber; an inner communication pipe is arranged on the precombustion chamber inner wall; an outer wall communication pipe is arranged on the precombustion chamber outer wall; the precombustion chamber inner wall is connected with an electromagnetic valve which can control the precombustion chamber inner wall to rotate relative to the precombustion chamber outer wall so that the inner wall communication pipe is communicated with or disconnected from the outer wall communication pipe; a throttle valve is arranged at an inlet end of the gas collecting cavity; an outlet end of the gas collecting cavity is respectively communicated with the main combustion chamber and a mixer; the mixer is respectively communicated with the natural gas storage bottle and the compressing cylinder; and the compressing cylinder is communicated with the natural gas nozzle. Layered combustion can be implemented by the fuel supply system only.

Description

technical field [0001] The present invention relates to an internal combustion engine, in particular a natural gas engine. Background technique [0002] With the wide application of internal combustion engines in vehicle engineering and ship engineering, the pollution of the ecological environment and the shortage of oil resources caused by them have become urgent problems to be solved in countries all over the world. Many countries have begun to study alternative fuels used in traditional engines. Among them, natural gas has attracted widespread attention due to its high calorific value, clean emission and abundant reserves. [0003] For marine natural gas engines, due to the large bore and relatively long flame propagation time, remote deflagration is prone to occur, and the lean combustion (φa>1) method is generally used to reduce the possibility of deflagration. However, when the mixture is leaner, the combustion rate decreases, and even flame quenching or misfire i...

AI Technical Summary

Problems solved by technology

However, in order to form mixed gas with different concentrations, the current pre-chamber natural gas engines generally use two sets of fuel supply devices to supply fuel to the pre-chamber and the main combustion chamber respectively. The system structure and control process are relatively complicated and costly.

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