Gas inlet system of marine diesel engine

Abstract

The invention discloses a gas inlet system of a marine diesel engine. The gas inlet system of the marine diesel engine comprises a gas inlet pipe, a gas exhaust pipe and an oxygen extraction device. The gas outlet end of the gas inlet pipe is communicated with a gas inlet passage of a cylinder cover, and the gas inlet end of the gas inlet pipe is in a sealed state. The gas exhaust pipe is communicated with a gas exhaust passage of the cylinder cover to be used for exhausting waste gas and is communicated with the gas inlet pipe through a bypass gas collecting pipe. An oxygen injecting nozzle of the oxygen extraction device extends to the gas outlet end of the gas inlet pipe through a pipeline. The oxygen extraction device is provided with an adjusting switch used for adjusting oxygen supply, the adjusting switch is connected with a throttle control handle of the diesel engine through a drive component, and the throttle control handle drives the drive component to control the opening degree of the adjusting switch, so that the oxygen extraction device is controlled to supply different amounts of oxygen to the interior of the gas inlet pipe. According to the gas inlet system of the marine diesel engine, diesel engine exhaust gas is mixed with pure oxygen to form a gas mixture, and only the gas mixture instead of air in the atmosphere is used, so that no nitrogen participates in the burning work of the diesel engine, and the emission of the exhaust gas is greatly reduced.

Description

technical field [0001] The invention relates to an air intake system of a diesel engine, in particular to an air intake system of a marine diesel engine. Background technique [0002] As we all know, when a diesel engine is working, the intake air is usually taken directly into the atmosphere. For supercharged and intercooled models, it needs to be boosted by the supercharger first, then cooled by the intercooler and then enter the intake pipe. into the cylinder. [0003] During the working process of the diesel engine, because the temperature and pressure in the cylinder are high, it is easy to produce a large amount of nitrogen oxides NOx, because the relevant emission regulations have strict requirements on nitrogen oxides NOx, so the use of EGR exhaust gas recirculation or SCR selective catalytic Reduction and other methods to control the emission of nitrogen oxides NOx. Among them, the cost of using the SCR selective catalytic reduction scheme is very high, which incr...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an air intake system for marine diesel engines, so as to overcome the shortcomings of the reduction and failure of the existing catalysts using the SCR selective catalytic reduction scheme after a certain period of use, which leads to the reduction of the ability to treat exhaust gas

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