Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Patent
1997-08-08
2000-01-11
Kamen, Noah P.
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
2988801, 464 2, F01L 134
Patent
active
060124199
ABSTRACT:
In a rotational phase adjusting apparatus used for adjusting opening/closing timings of an intake valve or an exhaust valve of an internal combustion engine, a shoe housing driven by a driving shaft has a circumferential wall and a front plate which are integrally formed by aluminum die-casting. Each shoe has a distortion-absorbing hole, and a fan-shaped chamber for accommodating a vane for driving a driven shaft is formed between adjacent two of the shoes. The outer circumferential wall of each shoe has a recess which has an arch shape in section and extends in an axial direction. A clamp seat is formed on a front plate side. When the clamp seat is pressed by a draw claw, a portion of each shoe on the outer circumferential side of the distortion-absorbing hole is resiliently deformed, but a portion of each shoe on the inner circumferential side of the distortion-absorbing hole is deformed less. Thus, this improves the machining accuracy of working surfaces of the shoe housing which affects on sealability and sliding wear between component parts.
REFERENCES:
patent: 5107804 (1992-04-01), Becker et al.
patent: 5666914 (1997-09-01), Ushida et al.
Iwasaki Kazutoshi
Matsumoto Yoshio
Denso Corporation
Kamen Noah P.
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