Effect of Methanol/Water Mixed Fuel Compound Injection on Engine Combustion and Emissions

Due to the recent global increase in fuel prices, reduce emissions from ground transportation and improve urban air quality, it is necessary efficiency emissions. Water, methanol, a mixture of two were added at pre-intercooler position keep same charge cooling original rich mixture, BSFC ITE, promote combustion. The methanol/water mixing volume ratios different injection strategies compared find best balance between consumption, performance, emission trends. By simulating combustion mechanism water, diesel mixed through Chemkin system, ignition delay, temperature change, generation rate hydroxyl group (−OH) reaction process analyzed. Furthermore, performance engine analyzed combination with actual experiment process. This paper studied application concentration water–methanol–diesel engines. Five water–methanol blending injected into position, such as 100% 90% methanol/10% 60% methanol/40% 30% methanol/70% water was used. With premixes, affected by droplet extinguishment, flashing, or explosion, resulting changes affecting In this article, carryout intake port indicated thermal brake specific consumption decrease concentration, CO, UHC, nitrogen oxide particular, when methanol 40% added, found that delay shortest cylinder pressure largest, but heat release indeed lowest.