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US 5,078,102 AGranted
Engine valve driving device
OwnerTakuya Matsumotoinventor
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OwnerTakuya Matsumotoinventor
Estimating the term…
An engine valve driving device includes a rocker arm attached at one end to a valve stem and carrying at its opposite end a roller which engages the surfaces of a stepped cam plate. The cam plate has a horizontal surface which includes upper and lower portions joined by an inclined portion so that horizontal reciprocating motion operates the rocker arm and the connected valve. The cam plate is connected to a rotary cam crank shaft so that rotation of the crank shaft produces linear reciprocating motion in the cam plate. The connection between the cam shaft and the cam plate is adjustable, as by a hydraulic cylinder, to vary the gap between the cam plate and the cam shaft and to thereby vary the timing of the motion of the valve with respect to the rotation of the cam shaft. In an alternative form, the connection between the cam and the cam shaft may be a pivotal lever, with the pivot point of the lever being movable to provide timing adjustment.
An engine valve driving device which is characterized by having a rocker arm attached on one end to a valve stem and having on the other end a roller engaging the cam surface of a movable cam plate, said cam surface having upper and lower horizontal portions linked by an inclined vertical portion to form a stepped cam surface, said cam plate being connected to a cam crank shaft through a connecting member to produce repeated advance and retreat movements in said cam surface.
An engine valve driving apparatus, comprising:
Adjustable engine valve driving apparatus for varying the timing of valve operation to control engine operation at both low and high rotational speeds, comprising:
Dependencies are inferred from the claim text.