Gas engine

Abstract

A gas engine using LPG or natural gas as fuel supply has a secondary vaporizer in between the reducer and distributor. The secondary vaporizer is comprised by a sealed water pipe and a sealed gas pipe which are connected side by side. On the secondary vaporizer may install a heating system and temperature sensor. The engine of this kind of structure is characterized of balanced gas distribution in each cylinder and stable running.

Description

technical field [0001] The invention relates to a gas engine, in particular to a gas engine using liquefied petroleum gas and natural gas as fuel. Background technique [0002] To meet the needs of national environmental protection and fuel structure adjustment, gas engines are the main way of power in road and water transportation. [0003] The fuel supply system of the gas engine currently used in my country is divided into a negative pressure system and a positive pressure system, which are mainly composed of a fuel gas cylinder, a pressure reducer, a control unit, a wiring harness, a fuel display, a distributor (injection system) and a nozzle. In general, it can be used normally. But in the following two cases, it will not work normally: 1. Multiple pressure reducers are used in parallel on high-power gas engines: when two or more pressure reducers are used on high-power gas engines, such as each The mixer supplies fuel to each cylinder of the engine separately. It is ...

AI Technical Summary

Problems solved by technology

But in the following two cases, it will not work normally: 1. Multiple pressure reducers are used in parallel on high-power gas engines: when two or more pressure reducers are used on high-power gas engines, such as each The mixer supplies fuel to each cylinder of the engine separately. It is impossible to make each pressure reducer consistent in terms of fuel vaporization, vaporized gas fuel pressure and density, etc., so that when the engine is working, the output of each cylinder of the engine The power is different, and the gas engine cannot work normally and stably; 2. Outboard engine: Outboard engine is a means of transportation used in lakes and offshore. Because the cooling system adopts external circulation, it uses gas fuel When using the warm water in the engine cooling system for fuel vaporization required by gaseous fuels, it will have a greater impact

When the engine is running at idle speed, the cooling water in the engine will decrease rapidly with the increase of idle running time, which will make the vaporization quality of gas fuel worse

Especially in the gas continuous injection system, the actuator on the fuel distributor --- the stepper motor, is installed in the hanger cover, and cannot be used when the engine is running under heavy load (so the fuel is in gas-liquid two-phase supply). The air takes away the cold air accumulated on the stepping motor, resulting in easy frosting and icing, which affects the normal operation of the fuel supply system

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