Hydrogen internal combustion engine combustion system and combustion control method

Abstract

The invention relates to the technical field of internal combustion engines, and provides a hydrogen internal combustion engine combustion system and a combustion control method. The hydrogen internal combustion engine combustion system comprises a jet flow chamber and a main combustion chamber. A spark plug is arranged in the jet flow chamber, a jet flow hole is formed in the bottom of the jet flow chamber, and the main combustion chamber communicates with the jet flow chamber through the jet flow hole. The system further comprises a hydrogen ejector, and a nozzle of the hydrogen ejector is arranged in the jet flow chamber. The nozzle is used for spraying hydrogen into the jet flow chamber at the tail phase of the air intake stroke and the compression stroke, and in the air inlet stroke, thin mixed gas is distributed in the main combustion chamber. And at the later phase of the compression stroke, concentrated mixed gas is distributed in the jet flow chamber. Based on the active jet flow ignition technology of the jet flow chamber, the heat efficiency of an internal combustion engine can be improved; and meanwhile, the hydrogen two-time ejection technology is adopted, the thin mixed gas and the thick mixed gas are formed in the main combustion chamber and the jet flow chamber respectively, NOx generation can be effectively restrained in the whole combustion chamber, and NOx emission is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of internal combustion engines, in particular to a hydrogen internal combustion engine combustion system and a combustion control method. Background technique [0002] In order to meet the increasingly stringent fuel consumption requirements, the thermal efficiency of the internal combustion engine must be greatly improved. Among them, lean combustion (referred to as "lean combustion") is a relatively promising one among many technical routes. However, under lean-burn conditions, especially when the excess air ratio of the mixture reaches more than 2.0, unstable ignition and flame propagation are prone to occur, and it is necessary to increase the ignition energy. Jet ignition technology is an effective way to solve this problem, mainly including jet ignition system with jet chamber, the spark plug first ignites the gas in the jet chamber, the temperature and pressure in the jet chamber rise sharply, and the...

AI Technical Summary

Problems solved by technology

However, studies have shown that due to the high combustion speed and high combustion temperature of hydrogen, the NOx emission is very high, which can reach more than 6000ppm, and the treatment cost after NOx purification is very high.

Images