Equivalent combustion system and control method based on mixture gas dilution

Abstract

The invention discloses an equivalent burning system based on mixed gas dilution and a control method thereof. The device comprises a turbocharger air compressor, an electric supercharger, an inlet gas heater, an inlet gas intercooler, a pressure sensor, a temperature sensor, an air duct oil sprayer and a gas inlet of a cylinder, which are sequentially connected through a gas inlet duct total pipeline, wherein one end of an EGR pipeline communicates with the gas inlet duct total pipeline between the inlet gas heater and the inlet gas intercooler; the other end of the EGR pipeline is sequentially connected with an EGR check valve, an electrically controlled EGR valve, an EGR intercooler and the connecting part of an exhaust pipe and an exhaust opening of the cylinder; a polyoxymethylene dimethyl ether direct injection oil sprayer is mounted in the cylinder; the exhaust pipe is sequentially connected with the exhaust opening of the cylinder, an exhaust gas turbine, an exhaust gas oxygen sensor and a three-way catalyst; and a gas inlet gate delay closing device is mounted on a cylinder cover, and a cylinder pressure sensor is mounted in the cylinder. By adopting the device and the method, when the fuel consumption rate is increased, superlow nitric oxide and soot emission is kept.

Description

technical field [0001] The invention relates to the field of internal combustion engines, in particular to an equivalence ratio combustion system based on mixture gas dilution and a control method thereof. Background technique [0002] Diesel / gasoline dual-fuel high premixed compression ignition (HPCC) combustion mode uses in-cylinder direct injection of diesel fuel and gasoline fuel injected from the pilot gas channel. Through the coordinated control of fuel chemical activity and concentration stratification, it can be used in a relatively wide range of operating conditions. Partially solve the problem that the diesel engine cannot reduce NO at the same time x And soot problems, while maintaining a high thermal efficiency. However, it is impossible to fundamentally break through the defects of low-temperature combustion of diesel engines. Due to the difficulty in controlling the ignition and heat release process, the expansion of large loads is firstly limited by the probl...

AI Technical Summary

Problems solved by technology

However, the form of pure polyoxyl dimethyl ether (PODE) is difficult to be directly used in traditional diesel engines. About 50%, burning pure polyoxymethylene dimethyl ether (PODE) will significantly increase the volume flow rate of fuel supply, and the unit calorific value requires a longer fuel injection duration, so it is necessary to improve the fuel supply system and fuel injection strategy , which is not conducive to the improvement of engine thermal efficiency and to meet the requirements of power performance;

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