High efficiency stoichiometric internal combustion engine...

Details High efficiency stoichiometric internal combustion engine... High efficiency stoichiometric internal combustion engine...

2007-05-15

2009-06-02

Solis, Erick (Department: 3747)

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

C123S681000, C123S704000, C123S559100, C123S565000

Reexamination Certificate

active

07540279

ABSTRACT:
A power system including a stoichiometric compression ignition engine in which a roots blower is positioned in the air intake for the engine to control air flow. Air flow is decreased during part power conditions to maintain the air-fuel ratio in the combustion chamber of the engine at stoichiometric, thus enabling the use of inexpensive three-way catalyst to reduce oxides of nitrogen. The roots blower is connected to a motor generator so that when air flow is reduced, electrical energy is stored which is made available either to the roots blower to temporarily increase air flow or to the system electrical load and thus recapture energy that would otherwise be lost in reducing air flow.

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