Valve train system of internal combustion engine and control...

Details Valve train system of internal combustion engine and control... Valve train system of internal combustion engine and control...

2006-02-28

2006-02-28

Denion, Thomas (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

C123S568140, C123S677000, C123S679000, C123S687000, C123S316000, C123S568110, C060S285000

Reexamination Certificate

active

07004125

ABSTRACT:
A valve train system for operating an intake valve of an internal combustion engine, in which an operation amount of the intake valve is controlled. When it is determined that there is a need of improving a fuel efficiency by increasing the compression ratio within the combustion chamber on the basis of an engine operating state, an exhaust valve is opened and subsequently closed after an intake stroke until the pressure within the exhaust chamber becomes equal to the pressure within the exhaust passage so as to increase the compression ratio within the exhaust valve.

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