Hydrogen fueled reciprocating spark ignition engine

摘要

A hydrogen fueled reciprocating spark ignition engine is disclosed, wherein it comprises: a fuel system for providing gaseous hydrogen to the cylinders of the engine and a lean Nox trap coupled to the engine for treating the exhaust from the engine; an EGR system for providing recirculated exhaust gas to the engine: and a controller for operating the fuel system and the EGR system during periodic purging of the lean Nox trap such that the engine is operated at a richer than stoichiometric air/fuel ratio, and with the mass of EGR approximating 40-80% of the mass of air and fuel. The hydrogen fueled reciprocating spark ignition engine may also include a three way catalyst mounted upstream of the lean Nox trap and a selective catalytic reduction (SCR) converted mounted downstream from the lean Nox catalyst.