Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Reexamination Certificate
2007-04-10
2007-04-10
Chang, Ching (Department: 3748)
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
C123S090390, C123S090440
Reexamination Certificate
active
10477089
ABSTRACT:
A device for controlling the variation of the opening and closing times and durations of a valve (8) comprises an elastic means (18) acting upon an assembly consisting of a lever device (1) and a valve stem (11) not in the closing direction but in the opening direction of the valve (8). The assembly consisting of the lever device (1) and of the opening cam (5) and the closing cam (6) fulfils a dual function, one for opening the valve (8), the other for moving it back for its closure. The control device, which comprises a device for offsetting the angular position of the cam position relative to the crankshaft, allows to control the opening and closing duration of the valve (8) over a very wide range extending, for opening, from 210° to 350° of crankshaft rotation approximately, by varying the valve opening and closing times independently of each other. It is applicable to a wide range of engines.
REFERENCES:
patent: 1633882 (1927-06-01), Ballot
patent: 2641236 (1953-06-01), Mansfield
patent: 3313280 (1967-04-01), Arutunoff et al.
patent: 4420141 (1983-12-01), Goloff
patent: 4724822 (1988-02-01), Bonvallet
patent: 100 61 711 (2001-08-01), None
patent: 359 715 (1931-10-01), None
patent: WO 9637688 (1996-11-01), None
Patent Abstracts of JAPAN, vol. 013, No. 380 (M-863).
Aug. 23, 1989 & JP 01 134009 A (Yoshiari Takagi).
May 26, 1989 Abstract.
Chang Ching
Ostrolenk Faber Gerb & Soffen, LLP
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