Self-aligning valve assembly

Details Self-aligning valve assembly Self-aligning valve assembly

1993-08-18

1994-05-24

Cross, E. Rollins

Internal-combustion engines

Poppet valve operating mechanism

Spring

1231888, 1231889, F01L 308, F01L 310

Patent

active

053139178

ABSTRACT:
The self-aligning valve assembly facilitates proper seating of an engine exhaust valve even though the valve seat is distorted or tilted due to temperature gradients. The valve assembly includes a guide member having a flat surface that slides across a flat surface on the engine block. The guide assembly also includes a return spring and a spring retainer that engages a notch on the valve stem. The spring is disposed between the guide member and the spring retainer. To improve valve closing, the seating surface on the underside of the valve head is preferably convex, while the valve seat is conical. In operation, the compression spring forces proper seating to occur by acting on the retainer which is in turn connected to the valve stem. The guide member slides to reorient the valve stem to the proper position for optimal seating.

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