Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Reexamination Certificate
2007-05-11
2010-06-22
Chang, Ching (Department: 3748)
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
C123S090110, C251S129010
Reexamination Certificate
active
07739986
ABSTRACT:
A device and a method are provided for regulating the lift characteristic of a charge cycle valve of an internal combustion engine. The device comprises a controllable drive unit having an actuator element for actuating the charge cycle valve, two energy storage means acting on the charge cycle valve in opposite drive directions and a regulating means for controlling the drive unit. The regulating unit controls the drive unit according to a stored setpoint path, on the basis of which the charge cycle valve is transferred from a first end position into a second end position and vice versa. The setpoint path is designed so that it maps the ideal transient characteristic of the energy storage-drive element-energy storage system of the device without taking any additional ambient influences into account.
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International Search Report dated Feb. 22, 2006 including English translation (Four (4) pages).
German Search Report dated Aug. 4, 2005 including English translation (Six (6) pages).
Beierlieb Christian
Seethaler Rudolf
Bayerische Motoren Werke Aktiengesellschaft
Chang Ching
Crowell & Moring LLP
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