Investigation of torque performance effect on the development of sequential injection CNG engine

This research explores the effect of diesel engine convert to sequential or multi point injection dedicated CNG engine. The engine conversion is by modification and reduce the piston compression ratio, change the fuel system from mechanical system to ECU system, added the spark ignition system and intake air throttle. In this research, the effect of diesel engine convert to CNG engine is investigated based on engine speed variation. The engine speeds variation is 1000 to 4000 rpm with variation in 500 rpm. This engine conversion and torque performance effect investigation is conducted at Automotive Laboratory, Faculty of Mechanical Engineering, University Malaysia Pahang, Malaysia. The engine conversion effect is reduce the engine torque performance. Another is that, the increasing engine speeds can be increase the deviation of engine torque performance of diesel engine compared CNG engine.