Valve timing adjustment device

Details Valve timing adjustment device Valve timing adjustment device

1998-08-25

1999-09-07

Lo, Weilun

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9031, F01L 1344

Patent

active

059470674

ABSTRACT:
A vane type valve timing adjustment device used in an internal combustion engine, wherein a plurality of vanes are formed radially and integrally from a boss portion of a vane rotor and a stopper portion able to contact a housing side is formed at a specific vane among these. Since a large stress acts at the root portion where the specific vane connects with the boss portion, stress is prevented from concentrating at the root portion by chamfering the corner or forming a connecting part with a large radius of curvature or a nonmachined surface, surface hardened surface, etc. to increase the strength.

REFERENCES:
patent: 5361735 (1994-11-01), Butterfield et al.
patent: 5605121 (1997-02-01), Scheidt et al.
patent: 5666914 (1997-09-01), Ushida et al.
patent: 5738056 (1998-04-01), Mikame et al.
patent: 5823152 (1998-10-01), Ushida

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