RESEARCH ON THE SELECTION OF APPROPRIATE PRIMING INJECTION IN MAXIMUM TORQUE MODE WHEN CONVERTING CONVENTIONAL DIESEL ENGINE TO USE DUAL FUEL LPG/DIESEL FUEL ENGINE

Abstract

This paper presents the results of research on selecting the appropriate amount of primer injection at the maximum torque mode when converting a diesel engine to use dual fuel LPG/Diesel. The original diesel engine had an electronically controlled accumulator fuel injection system. A new electronically controlled LPG supply system was designed. The author tested engines with different amounts of primer injection with 20% LPG dual fuel at 100% load, 2000 rpm, and maximum torque. The influence of diesel priming on the concentration of emission components, pressure changes in the cylinder, and the vibration of the LPG/Diesel dual-fuel engine were analyzed and evaluated to select the appropriate amount of priming injection. In this study, the appropriate amount of priming injection was determined to be in the range of 110 µs to 120 µs.