Air admission and fuel supplying system for gas engine

Abstract

A gas inlet and fuel supply system of gas engine, which contains air-fuel ratio controller and gas distributor, wherein the air channel of air-fuel ratio controller and gas channel has same size and machining precision with proportional number, the gas distributor mainly consisting of gas distribution disk and cover whose gas outlet number is same with that of engine cylinder, circular gas groove is etched in gas distribution disk synchronously rotating with gas distribution cam shaft of engine. Said invention can control air-fuel ratio and gas distribution timing with easy starting, stable operating, high thermal efficiency etc.

Description

1. Technical field [0001] The invention relates to a fuel supply system of an internal combustion engine, in particular to an air intake and fuel supply system of a gas engine. 2. Background technology [0002] The air intake and fuel supply system of a gas engine is the core of the gas engine, and its working characteristics fundamentally affect the overall performance of the gas engine. [0003] At present, the gas engines used in the market mainly adopt the following air intake and fuel supply systems: [0004] 1. Mixer pre-mixing type. This air intake and fuel supply system has been used for many years at home and abroad. It is a recognized mature and reliable technology, such as: 12V190 gas engine, which is characterized by both gas and air entering The mixture is mixed in the mixer to obtain a mixture that maintains a basically stable air-fuel ratio, and then enters each cylinder through the engine's total intake pipe and intake manifold. The performance of the mixer...

AI Technical Summary

Problems solved by technology

The advantage of this air intake and fuel supply system is that it is simple and reliable, and maintains a good stability of the air-fuel ratio; there are two main disadvantages: one is that it cannot be applied to gas with a fast combustion speed and a large ignition range, because it is a pre-heating system before the intake pipe. Mixing, when the engine is working, the entire intake pipe is filled with combustible mixture, so for H 2 or CO gas, its tempering tendency and danger are serious, so this intake method is not suitable for gas containing H 2 or combustible gases with a high amount of CO

The second is that it is not suitable to adopt the supercharging scheme or even if the supercharging effect is not obvious, the advantages of the supercharging model cannot be fully utilized.

Its disadvantage is that it lacks effective measures to control the air-fuel ratio. It is fashionable to use coking gas with a large ignition range and fast combustion speed, but it is acceptable to use coking gas that does not contain H 2 Or CO gas such as natural gas, biogas, etc., either it is difficult to start, or it can only be used at a fixed load; if the load changes, the air-fuel ratio changes greatly, and it is prone to abnormal operation such as misfire, backfire, and blasting

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