Arm type valve gear

Details Arm type valve gear Arm type valve gear

2005-06-07

2005-06-07

Denion, Thomas (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

Rocker

C123S090430, C123S090520, C123S090530, C123S090540, C411S180000

Reexamination Certificate

active

06901896

ABSTRACT:
For an arm type valve gear in which a lash adjuster is mounted between an arm pivoted by the rotation of a cam and a valve stem, it is a goal to reduce the axial length of the lash adjuster and to suppress wear at the contact portion with the valve stem. An engaging hole is formed in an arm pivoted by the rotation of a cam at a position corresponding to the top end face of a valve stem. A lash adjuster received in the engaging hole includes a nut member, an adjuster screw in threaded engagement with the nut member, an elastic body biasing the adjuster screw toward the valve stem, and a ball joint to reduce the axial length of the lash adjuster. Further, by bringing the bottom end face of the ball joint into surface contact with the top end face of the valve stem, wear at the contact portion is suppressed.

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