Electromagnetic valve

Details Electromagnetic valve Electromagnetic valve

2006-10-03

2006-10-03

Denion, Thomas (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

C123S090150, C251S129150, C251S129220

Reexamination Certificate

active

07114472

ABSTRACT:
A shaft is press-fit into the valve member or the plunger of an electromagnetic valve to transmit the axial movement of the plunger to the valve member. A diameter reducing mechanism is provided for reducing the diameter of at least the press-fit portion of the shaft so that the diameter of the shaft is decreased by a press-fitting force applied to the shaft by the valve member and/or plunger. Deformation due to the press-fitting process is absorbed by the shaft, so deformation of the valve member and/or plunger is inhibited. Accordingly, it is unnecessary to give a large margin to a plunger side air gap, and magnetic efficiency can be improved. Also, two chambers on both axial sides of the plunger can communicate with each other through a clearance provided by the C-shaped cross-section, an inner hole and a penetration hole of the shaft. Therefore, it is unnecessary to form any separate groove or hole in the plunger for respiration.

REFERENCES:
patent: 2001/0048090 (2001-12-01), Kobayashi et al.
patent: 2001-108135 (2001-04-01), None
patent: 2003-97756 (2003-04-01), None

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