关键词: 天然气发动机；加氢比例；燃烧性能；台架试验

Abstract: Under the dual pressure of energy and environment, hydrogenation in natural gas engines is a good way to improve engine characteristics. In order to study the effect of hydrogenation ratio on the combustion and performance of natural gas engine, this paper will carry out hydrogenation equipment modification and bench test on a natural gas engine. The research results show that hydrogenation can accelerate the flame propagation speed of the mixture, shorten the duration of combustion in the cylinder, and significantly advance the combustion center of gravity, further increasing the maximum combustion temperature and maximum explosion pressure. But with the increase of engine load, this promotion effect is gradually weakened.

Key words: Natural gas engine; Hydrogenation ratio; Combustion performance; Bench test