The Effect on Gasoline Engine Emission Characteristics of Variable Composition Oxygen-Enriched Intake Air Systems and Analysis of Heat-Resistant and Anti-Corrosion Coatings with Remanufacturing

ABSTRACT

In this paper, taking air-cooled, four-stroke, single cylinder gasoline engine as the research object, oxygenenriched intake air systems and gasoline engine performance test bed were built. In the range of 21% to 26% enrichment ratio, based on MAP chart of variable component enriched intake, control parameters were adjusted according to the PWM principle, and a gas mixture of different oxygen and nitrogen components was prepared for the test engine. Under the conditions of different components intake air, an HC, CO and NO_x emission characteristics of gasoline were comparatively analyzed through universal characteristic test. The results show that the lowest HC emissions and CO emissions under conditions of variable components of the oxygen-enriched intake air were reduced by 17.59% and 17.14% compared with the normal intake. The lowest NOx emission was 53 × 10^-6, which increased by 7.55%. Under conditions of variable component oxygen-enriched intake air, HC and CO emissions of gasoline engine significantly reduced, and NOx emissions deteriorated slightly, which improved the relatively integrated emission performance of gasoline engine. Aiming at the engine corrosion problems raised under high temperature, oxygen-enriched, heat-resistant and anti-corrosion coatings on key parts of the engine corroded easily by advanced manufacturing technology were proposed. Based on the above method, the reliable operation of the engine can be ensured and the technical life and economic life can also be prolonged.

Keywords:

Gasoline engine, oxygen-enriched intake air, remanufacturing, universal characteristic, variable composition.