Internal combustion engine with variable valve actuation

Details Internal combustion engine with variable valve actuation Internal combustion engine with variable valve actuation

1999-02-25

2000-10-31

Lo, Weilun

Internal-combustion engines

Poppet valve operating mechanism

Hydraulic system

123 9016, 123 9019, 123 9049, F01L 902, F01L 1300

Patent

active

061386219

ABSTRACT:
An internal combustion engine having a hydraulic system for valve variable actuation and a hydraulic braking device for braking the valve in the final stage of its closing travel. A passage is provided for excluding the above mentioned braking when the engine is in operative conditions in which the fluid used in the device has a viscosity greater than a predetermined value.

REFERENCES:
patent: 4889085 (1989-12-01), Yagi et al.
patent: 5158048 (1992-10-01), Robnett et al.
patent: 5216988 (1993-06-01), Taxon
patent: 5275136 (1994-01-01), Schechter et al.
patent: 5421359 (1995-06-01), Meister et al.
patent: 5485813 (1996-01-01), Molitor et al.
patent: 5531192 (1996-07-01), Feucht et al.
patent: 5577468 (1996-11-01), Weber

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