Internal-combustion engines – Charge forming device – Exhaust gas used with the combustible mixture
Reexamination Certificate
2005-04-12
2005-04-12
Wolfe, Jr., Willis R. (Department: 3747)
Internal-combustion engines
Charge forming device
Exhaust gas used with the combustible mixture
C123S090160
Reexamination Certificate
active
06877493
ABSTRACT:
In variable operation intake valve controlling apparatus and method for an internal combustion engine, using both of a cam operational angle variable mechanism and a cam phase variable mechanism, a controller controls an intake air quantity in accordance with valve timings of the intake valve determined according to the operational angle through the cam operational angle variable mechanism and the phase through the cam phase variable mechanism, the controller determining an allowable residual gas quantity from a required air quantity and an engine speed, the required air quantity being determined according to a manipulated variable of an accelerator, calculating optimum intake valve open and closure timings (IVO and IVC) in such a manner that both of the required air quantity and the allowable residual gas quantity enter a cylinder of the engine, and determining the operational angle and the phase from the optimum intake valve open and closure timings.
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U.S. Appl. No. 10/452,252, filed Jun. 3, 2003, Kawamura et al.
Etou Takeshi
Kawamura Katsuhiko
Nissan Motor Co,. Ltd.
Wolfe, Jr. Willis R.
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