An engine with a secondary combustion chamber

Abstract

The invention provides an engine with an auxiliary combustion chamber. The engine comprises a primary combustion chamber, an auxiliary combustion chamber, a first fuel injector, a second fuel injectorand a glow plug, wherein the first fuel injector stretches into the primary combustion chamber or an air duct of an air inlet; the second fuel injector and the glow plug stretch into the auxiliary combustion chamber; the auxiliary combustion chamber communicates to the primary combustion chamber through a channel. The glow plug is a jet wall-impacting glow plug; and the second fuel injector is adouble fluid fuel injector. The double fluid fuel injector sprays a gas-oil mixture to the auxiliary combustion chamber or only sprays gas to enhance gas flow in the auxiliary combustion chamber to improve the ventilating efficiency of the auxiliary combustion chamber, so that the problem that it is hard to ventilate in the auxiliary combustion chamber is solved. By adjusting the mounting position, the oil-gas mixture sprayed by the double fluid fuel injector can impact the jet wall-impacting glow plug to different extents so as to accelerate the atomizing and evaporating speeds of fuel. Meanwhile, the ignition stability of the engine can be enhanced by means of a surface ignition effect of the jet wall-impacting glow plug and a self-ignition effect of heavy oil / kerosene.

Description

technical field [0001] The invention belongs to the field of power machinery research, and in particular relates to an engine with a secondary combustion chamber. Background technique [0002] In order to improve fuel economy, the auxiliary combustion chamber is widely used in the engine to form a secondary vortex to promote the mixing and combustion of oil and gas. Burning fuels such as heavy oil / kerosene further improves engine economy. However, due to the high viscosity and poor volatility of heavy oil / kerosene and other fuels, the atomization and evaporation of heavy oil / kerosene is difficult and the ignition stability is poor, which restricts the use of heavy oil / kerosene and other fuels. At present, there are many literatures and patents about secondary combustion chamber engines, but they all have problems of difficult atomization and evaporation of heavy oil / kerosene and unstable ignition; meanwhile, the problem of low ventilation efficiency of secondary combustion ...

AI Technical Summary

Problems solved by technology

The invention can simultaneously solve the problems of slow atomization and evaporation speed of fuels such as heavy oil / kerosene and difficulty in ventilation of auxiliary combustion chambers, etc.

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