Multiple cylinder engine

Details Multiple cylinder engine Multiple cylinder engine

2006-05-30

2009-08-25

Chang, Ching (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

C123S090390, C123S090440, C123S090600, C074S569000

Reexamination Certificate

active

07578272

ABSTRACT:
A multiple cylinder engine includes a plurality of cylinders. Each cylinder includes a valve configured to open and close a port associated with each of the respective cylinders. The cylinders comprises at least a first cylinder group and a second cylinder group. A drive shaft is configured to rotate about an axis. A plurality of valve actuators are configured to transmit rotational movement of the drive shaft to the valve. A change mechanism comprises a control member that is configured to change a transmission state of the rotational movement transmitted from the drive shaft to the valve actuators. The change mechanism is configured to sequentially change an open period and a lift amount of each valve by changing a control amount of the control member. The control member is common to the first and second cylinder groups and the transmission states for the first cylinder group differs from the transmission states of the second cylinder group in accordance with the control amount of the control member. The valve open period and the lift amount of the valves in the first cylinder group is capable of being set to zero in a predetermined operational range to suspend operation of the first cylinder group.

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