Study of factors influencing thermally induced backfiring in hydrogen fueled engines, and methods for backfire control

Abstract

The problems of intake manifold backfire and decreased engine power output have been obstacles to automotive hydrogen use. Thermal causes of backfiring are investigated using a CFR engine and an electronically controlled, timed fuel injection system. Correlation of backfiring and injection timing are reported. It is concluded that both maintenance of low average in-cylinder temperatures and the use of some means for timed, delayed fuel delivery are essential to achieving backfire-free operation under all conditions. 13 refs.