Internal-combustion engines – Combustion chamber means having fuel injection only – Using multiple injectors or injections
Reexamination Certificate
2007-10-02
2007-10-02
Argenbright, T. M. (Department: 3747)
Internal-combustion engines
Combustion chamber means having fuel injection only
Using multiple injectors or injections
C123S090150, C123S406410, C123S435000, C123S486000, C123S568140, C123S609000
Reexamination Certificate
active
11386203
ABSTRACT:
The present invention relates to methods for robust controlled auto-ignition and spark ignited combustion controls in gasoline direct-injection engines, including transients, using either exhaust re-breathing or a combination of exhaust re-compression and re-breathing valve strategy. These methods are capable of enabling engine operation with either lean of stoichiometric or stoichiometric air/fuel ratio for oxides of nitrogen (NOx) control, with varying exhaust gas recirculation (EGR) rates and throttle valve positions for knock control, and with a combination of homogeneous charge compression ignition (HCCI) and spark ignition (SI) combustion modes to optimize fuel economy over a wide range of engine operating conditions.
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Brown Barry L.
Chang Chen-Fang
Chang Man-Feng
Eng James A.
Kang Jun-Mo
Argenbright T. M.
GM Global Technology Operations Inc.
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