GAS-FUELED COMPRESSION IGNITION ENGINE WITH MAXIMIZED PILOT IGNITION INTENSITY AND PILOT FUEL INJECTION METHOD

摘要

PROBLEM TO BE SOLVED: To solve a defect of a conventional dual fuels engine in which a generation amount of NOX increases at a slightly high ignition intensity of a pilot fuel. SOLUTION: A method for injecting the pilot fuel into a combustion chamber of a compression ignition engine for igniting a gaseous fuel in the combustion chamber has a process of controlling a timing Tp of start of pilot fuel injection, a pilot fuel injection duration Dp and an ignition delay period Di to obtain Dp/Di smaller than 1. In this engine, a controller controls a device comprising a pilot fuel injector, a gaseous fuel source and an air source so that the timing Tp of the start of the pilot fuel injection, the pilot fuel injection duration Dp, and the ignition delay period Di have a relation of Dp/Di smaller than 1.