Valve timing adjusting mechanism for internal combustion engine

Details Valve timing adjusting mechanism for internal combustion engine Valve timing adjusting mechanism for internal combustion engine

1996-07-26

1997-07-08

Lo, Weilun

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9031, 74568R, 464 2, F01L 1344

Patent

active

056450214

ABSTRACT:
A valve timing adjusting mechanism for an internal combustion engine includes an internal gear mounted on either one of a crankshaft or a cam shaft of the engine for rotation therewith, an external gear assembled in surrounding relationship with the internal gear, the external gear being driving connected to the other one of the crankshaft and camshaft for rotation therewith, and an intermediate gear set disposed in an annular space between the internal and external gears to be moved by fluid under pressure applied thereto in an axial direction for effecting relative rotation of the internal and external gears. The intermediate gear set is composed of a primary gear formed with internal teeth in meshing engagement with external teeth of the internal gear and external teeth in meshing engagement with internal teeth of the external gear, an auxiliary gear formed with internal teeth in meshing engagement with the external teeth of the internal gear and external teeth in meshing engagement with the internal teeth of the external gear, and a plurality of circumferentially equally spaced retainer elements interposed between the primary and auxiliary gears, the retainer elements being adapted to adjust an axial distance between the primary and auxiliary gears and retained in a position where backlashes at the meshed portions of the component gears are eliminated.

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patent: 5203290 (1993-04-01), Tsuruta et al.
patent: 5209193 (1993-05-01), Uchida et al.
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