The influence of the hydrogen injection timing on the internal combustion engine working cycle

From an ecological aspect, the hydrogen has all properties to be a very good fuel for internal combustion engines. However high speed, as well possibility of backfire, is inconvenient port injection. In this paper, influence injection timing on engine working cycle parameters (pressure and temperature) was investigated deeply. The investigation, parameters, performed numerically by application ANSYS software. It observed geometry real with added pre chamber, in order layer mixture formation pressure damping, because speed. results are presented four cases different same spark timing. By earlier injection, time mixing rise homogenization uniform creation, chamber cylinder. This claim it confirmed basis obtaining gradient, which growing characteristics stoichiometric mixture. higher pressures surface under diagram positive from aspect efficiency. However, values gradient than classic Diesel engine. means that phenomena can cause brutal work mechanical stresses. value maximum smaller engine, due decreased compression ratio.