Variable valve system

Details Variable valve system Variable valve system

2007-02-13

2007-02-13

Denion, Thomas (Department: 3748)

Stoves and furnaces

Stoves

Heating

C123S090170, C123S090150, C123S090110, C251S284000, C251S288000, C701S105000

Reexamination Certificate

active

11060681

ABSTRACT:
A variable valve mechanism is installed to change the operating angle and lift amount of an intake valve in accordance with the rotation position of a control shaft. A worm wheel is secured to the control shaft. The worm wheel is coupled to a motor actuator via a worm gear. The motor actuator is controlled during a normal operation so that the rotation position of the control shaft changes within a normal rotation range. A low-end stopper and high-end stopper are installed outside the normal rotation range to mechanically restrict the rotation of the control shaft.

REFERENCES:
patent: 6260523 (2001-07-01), Nakamura et al.
patent: 6578534 (2003-06-01), Nohara et al.
patent: 6920852 (2005-07-01), Machida
patent: 2005/0193968 (2005-09-01), Nohara et al.
patent: A 2000-234507 (2000-08-01), None
patent: A 2002-349215 (2002-12-01), None

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