Variable valve timing arrangement for internal combustion engine

Details Variable valve timing arrangement for internal combustion engine Variable valve timing arrangement for internal combustion engine

1990-04-10

1992-01-14

Nelli, Raymond A.

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9018, 123 9011, F01L 134

Patent

active

050800558

ABSTRACT:
A schedule which is logged in terms of engine speed and which is divided into a number of engine operational zones, is used to determine the amount of axial displacement should be induced in a cam shaft on which a specially shaped cam is mounted. The cam has a first section which configured to simultaneously induce a change in valve lift and the valve closure timing, and a second section which maintains the valve closure timing at essentially a fixed value and induces a further increase in valve lift.

REFERENCES:
patent: 3730150 (1973-05-01), Codner, Jr.
patent: 4580533 (1986-04-01), Oda et al.
patent: 4696265 (1987-09-01), Nohira
patent: 4708101 (1987-11-01), Hara et al.
patent: 4753198 (1988-06-01), Heath
patent: 4759321 (1988-07-01), Matsumoto et al.
patent: 4765288 (1988-08-01), Linder et al.
patent: 4844022 (1989-07-01), Konno

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