Valve performance controller for internal combustion engine

Details Valve performance controller for internal combustion engine Valve performance controller for internal combustion engine

1997-09-10

1998-09-08

Lo, Weilun

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9017, 123 9015, F02D 1302, F01L 134, F01L 1300

Patent

active

058030298

ABSTRACT:
There is disclosed a valve performance controller for an internal combustion engine. A camshaft is provided with a plurality of cams having different cam profiles. Changeover of the cams is performed through operation of a valve lift control mechanism. Also, a valve timing control mechanism is provided on the camshaft. The valve timing mechanism has a pulley, which is connected to a crankshaft of the engine via a timing belt. The pulley is connected to the camshaft via a ring gear. Through movement of the ring gear along the axis of the camshaft, the relative rotational phase between the pulley and the camshaft is changed. At least during cam changeover operation, oil is charged and retained within the hydraulic chamber located on both sides of the ring gear in the moving direction thereof. This structure reduces an impact which acts on the timing belt upon changeover of the cams.

REFERENCES:
patent: 5031583 (1991-07-01), Konno
patent: 5497737 (1996-03-01), Nakamura

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