Valve operating system in SOHC-type engine

Details Valve operating system in SOHC-type engine Valve operating system in SOHC-type engine

1996-08-09

1998-01-06

Lo, Weilun

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9027, 123 9033, 123 9034, 123 9036, 123 906, 1231935, 123196M, F01L 118, F01L 1300, F01M 106, F01M 910

Patent

active

057043159

ABSTRACT:
In an engine including a variable timing/lift mechanism for an intake valve, journal portions of a valve-operating cam shaft are supported on cam bearing portions integrally provided in a cylinder head, and an intake rocker shaft is fixed by bolts to rocker shaft fixing portions provided on an upper surface of the cam bearing portions. By bringing opposite sides of intake rocker arms swingably supported on the intake rocker shaft into slidable abutment against positioning faces integrally formed on opposite sides of the cam bearing portions, the intake rocker arms are positioned in a thrust direction. Thus, it is possible to accurately and easily position the intake rocker arms in the thrust direction without the need for a special member.

REFERENCES:
patent: 4537166 (1985-08-01), Kimura et al.
patent: 4809562 (1989-03-01), Bendoraitas et al.
patent: 4938188 (1990-07-01), Seki et al.
patent: 5150675 (1992-09-01), Murata
patent: 5207193 (1993-05-01), Sugimoto et al.
patent: 5363818 (1994-11-01), Iwata et al.

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