Variable duration valve timing camshaft

Details Variable duration valve timing camshaft Variable duration valve timing camshaft

2005-02-15

2005-02-15

Denion, Thomas (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

C123S090160, C123S090150, C123S090310, C123S090600, C074S56800M, C074S5680FS, C074S567000

Reexamination Certificate

active

06854435

ABSTRACT:
A variable duration valve timing camshaft is disclosed. The camshaft has a shaft with fixed cam lobes and lobe modifying elements that are adapted to move outwardly as the rate of rotation of the camshaft increases thereby cooperating with the lobes to continuously increase the angular distance at constant radius of each fixed valve lobe's nose. The lobe modifying elements are further adapted to move inwards as the rate of rotation of the camshaft decreases thereby continuously decreasing the angular distance of constant radius of each fixed valve lobe's nose until it equals that of the fixed lobe. The lobe modifying elements are pivotally connected to the camshaft.

REFERENCES:
patent: 3144009 (1964-08-01), Goodfellow et al.
patent: 4332222 (1982-06-01), Papez
patent: 5253622 (1993-10-01), Bornstein et al.
patent: 3933923 (1991-04-01), None
patent: 440314 (1991-08-01), None
patent: 2485622 (1981-12-01), None
patent: WO 9500748 (1995-01-01), None

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