System and method of stoichiometric combustion for hydrogen...

Details System and method of stoichiometric combustion for hydrogen... System and method of stoichiometric combustion for hydrogen...

2007-10-13

2010-06-22

Vo, Hieu T (Department: 3747)

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

C123S568110, C123SDIG012, C701S108000

Reexamination Certificate

active

07740010

ABSTRACT:
A system includes a hydrogen fueled internal combustion engine, a fuel system configured to provide a flow of hydrogen fuel to the engine, and an exhaust gas recirculation (EGR) system configured to provide a flow of recirculated gas to the engine which includes exhaust gases. The system also includes an engine controller configured to control the fuel system and the EGR system, such that the engine receives a mixture which includes the hydrogen fuel, the ambient air and the recirculated gas in a stoichiometric fuel/air ratio that meets the torque demand on the engine.A method includes the steps of providing a flow of gaseous hydrogen fuel, a flow of ambient air, and a flow of recirculated exhaust gas to the engine. The method also includes the steps of mixing the flow of recirculated exhaust gas and the flow of ambient air, determining a flow of hydrogen fuel necessary to create a stoichiometric fuel/air ratio, and then regulating the hydrogen fuel flow to control the torque of the engine, minimize throttling work and provide a mixture comprised of the hydrogen fuel, the ambient air and the exhaust gas in a stoichiometric fuel/air ratio.

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