Engine double-effect air inlet system

Abstract

The invention relates to an engine double-effect air inlet system. A part connecting structure of the air inlet system is characterized in that a variable section compressor, a temperature regulator and a nitrogen-oxygen adjusting device are successively connected, a high molecule oxygen separation membrane is arranged in the nitrogen-oxygen adjusting device, and the separation membrane is divide into two cavity bodies; the right cavity body is communicated with a rich oxygen air inlet pipe; the left cavity body is communicated with a rich nitrogen air inlet pipe, the outlet air of the rich oxygen and rich nitrogen air inlet pipes passes through an air inlet mixer, and an air by-pass pipeline is arranged between the temperature regulator and the high molecule oxygen separation membrane so as to be directly introduced into the air inlet mixer; an exhaust pipe of an engine and a waste gas cooler are successively connected with the air inlet mixer, electromagnetic valves of the rich oxygen and rich nitrogen air inlet pipes and the air by-pass pipeline are independently controlled through an ECU (electronic control unit); and an inlet temperature, pressure, flow rate, oxygen concentration and CO2 concentration transducer are arranged between the inlet mixer and the air inlet pipeline of the engine. Phases of the left and right cavity bodies of the high molecule oxygen separation membrane are changed so as to obtain rich oxygen air inflow and rich nitrogen air inflow of different concentrations.

Description

technical field [0001] The invention belongs to the structure of an internal combustion engine, in particular to an intake system device of the engine. Background technique [0002] In recent years, with the development of engine technology and increasingly stringent emission regulations, higher requirements have been placed on the in-cylinder combustion of the engine. The advanced combustion technology can make the engine power, economy and emission be optimally balanced. The engine adopts oxygen-enriched combustion (the intake oxygen concentration is greater than 21%), which can shorten the combustion delay period, increase the combustion temperature, speed up the flame propagation speed, and significantly reduce the emission of diesel particulate matter and soot. Especially when the diesel engine is running under heavy load, the emission of particulate matter and soot will increase sharply due to incomplete combustion in the cylinder. In addition, when the engine is col...

AI Technical Summary

Problems solved by technology

Although the use of oxygen-enriched combustion can improve the deterioration of soot emissions, the problem that oxygen-enriched combustion will bring is the deterioration of NOx emissions after combustion

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