Efect of opening valve timing on engine torque of converted CNG engine at the engine speed

Abstract

This article presents a sudy on effect of opening valve timing on engine torque of CNG engine with port injection. The obtained results from simulation in 1800 rpm were indicated that: To be reduced the work portion of intake and exhaust processes it was needed to correct the opening valve timing is earlier in
comparision with the early open valve timing of diesel engine. For diesel engine was converted to naturally aspirated CNG engine with port injection, the one of important factors to increase engine torque that was decreased the work portion of exhaust anf intake processes