Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Patent
1998-03-02
1999-08-10
Lo, Weilun
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
123 9031, 74568R, 464 2, 464160, F01L 1344
Patent
active
059342331
ABSTRACT:
Apparatus for adjusting the basic position of a camshaft adjustment unit of an internal combustion engine, includes a first structure secured to a crankshaft and a second structure secured to a camshaft and having a camshaft-distant end surface formed with one or more form-fitting and/or force-locking force-transmitting elements. A piston reciprocates between two end positions and is so operatively connected with the first and second structures that a displacement of the piston results in a rotation of the first and second structures relative to one another. In order to position the adjustment unit in the basic position and to prevent the adjustment unit from executing a rotation relative to the camshaft after occupying the basic position, a tool is attachable to the adjustment unit which tool is formed with counterelements which complement the force-transmitting elements to effect a non-rotatable connection between the tool and the adjustment unit.
REFERENCES:
patent: 5355850 (1994-10-01), Gullberg
patent: 5447126 (1995-09-01), Kondoh et al.
patent: 5738055 (1998-04-01), Allen
Auchter Jochen
Golovatai-Schmidt Eduard
Strauss Andreas
Feiereisen Henry M.
Ina Walzlager Schaeffler OHG
Lo Weilun
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