Variable valve timing gear

Details Variable valve timing gear Variable valve timing gear

1994-09-20

1996-04-23

Lo, Weilun

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 906, 74568R, F01L 134

Patent

active

055093841

ABSTRACT:
A variable valve timing gear is suitable for internal-combustion engines of a piston construction which comprise intake and exhaust valves for the charge cycle control. The intake and exhaust valves are actuated by a camshaft which has intake and exhaust cams for this purpose. For influencing the valve overlap of the intake and exhaust valves, the intake and exhaust valves are constructed so that they can be rotated with respect to one another, for which a control arrangement is provided. This control arrangement is provided with a control element which is axially movably arranged in a bore of the camshaft and rotates the intake cams with respect to the exhaust cams via drivers constructed as pins and control guides.

REFERENCES:
patent: 2888837 (1959-06-01), Hellmann
patent: 4498352 (1985-02-01), Hedelin
patent: 4771742 (1988-09-01), Nelson et al.
patent: 4917058 (1990-04-01), Nelson et al.
patent: 5105679 (1992-04-01), Voigt
patent: 5136887 (1992-08-01), Elrod et al.
patent: 5211141 (1993-05-01), Hannibal et al.
patent: 5253622 (1993-10-01), Bornstein et al.
patent: 5307768 (1994-05-01), Beier et al.
"Design and Development of a Variable Valve Timing (VVT) Camshaft," Carl A. Schiele et al., Society of Automotive Engineers, Inc., Automotive Engineering Congress, Paper 740 102, Feb. 25-Mar. 1, 1994, p. 2.

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