Combustion control method of hydrogen-enriched and oxygen-enriched gasoline engine with egr

Abstract

The invention relates to a hydrogen-doped inlet air and oxygen-enriched gasoline engine with EGR and a combustion control method. The device mainly comprises a gasoline engine, an EGR cooler, an EGR valve, a water electrolysis device, a hydrogen storage, an oxygen storage, a pressure control device, a hydrogen injection device and an oxygen injection device. According to the hydrogen-doped inlet air and oxygen-enriched gasoline engine, in-cylinder combustion modes of four air inlet modes including inlet air doped with hydrogen and oxygen, small-scale exhaust gas recirculation and hydrogen doping, large-scale exhaust gas recirculation and hydrogen doping and oxygen enrichment are respectively adopted in a cold start and idling condition, a medium or small load condition, a large load condition and a full load condition of the engine, so that the effects that the thermal efficiency is obviously improved and the HC and CO discharge is reduced at the cold start and idling stage of the gasoline engine can be achieved; the pumping loss of the engine is greatly reduced in the medium or small load condition, and the oil consumption and NOx discharge are greatly reduced; the engine power is obviously increased within short time when a throttle valve is fully opened. The hydrogen-doped inlet air and oxygen-enriched gasoline engine has excellent overall properties such as low emission, low oil consumption and instantaneous high power output.

Description

technical field [0001] The invention relates to an engine, in particular to an intake air hydrogen-doped oxygen-enriched gasoline engine with EGR and a combustion control method. Background technique [0002] The pressure of environmental pollution and energy shortage has prompted automakers to continuously introduce advanced engine technologies, expecting to launch clean and efficient engines to meet increasingly stringent emission and economic regulations. Among them, rationally organizing the combustion in the engine cylinder is one of the important means to reduce engine emissions and improve economy. [0003] Studies have shown that hydrogen, with its excellent physical and chemical properties such as fast flame speed, wide combustion limit, and short quenching distance, can improve the combustion efficiency of fuel when it is mixed into the gasoline engine cylinder for combustion, and can make the gasoline engine obtain better emissions and economic performance. Pate...

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Problems solved by technology

[0005] High emissions of HC and CO at cold start of traditional gasoline engines; high fuel consumption and emissions during idling; insufficient fuel combustion at small and medium loads, large pumping losses, high engine fuel consumption and harmful emissions; high nitrogen oxide emissions under heavy loads; and engine Problems such as reduction in maximum power after miniaturization

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