Lubrication system for V-type overhead camshaft engine

Details Lubrication system for V-type overhead camshaft engine Lubrication system for V-type overhead camshaft engine

1991-03-28

1992-09-01

Cross, E. Rollins

Internal-combustion engines

Lubricators

Crankcase, pressure control

123 9033, 123 9034, 123 9018, 184 65, F01M 1102

Patent

active

051430347

ABSTRACT:
A lubrication system for a double overhead camshaft engine has a lubrication oil passage for applying regulated pressurized oil to each of intake and exhaust overhead camshafts for lubrication; oil passages branching off from the lubrication oil passage for applying pressurized oil to hydraulic valve lash adjusters and a variable valve timing mechanism, respectively, for hydraulic operation. The oil passage for the variable valve timing mechanism is formed in one of the intake and exhaust overhead camshafts to which the variable valve timing mechanism is installed and is provided with a control valve for opening the oil passage so as to actuate the hydraulic variable valve timing mechanism with pressurized oil when the engine operates at lower engine speeds.

REFERENCES:
patent: 4709667 (1987-12-01), Ichihara
patent: 4852534 (1989-08-01), Amaval
patent: 4938188 (1990-07-01), Seki et al.
patent: 4942855 (1990-07-01), Moto
patent: 4957079 (1990-09-01), Nakatani et al.
patent: 5003937 (1991-04-01), Matsumoto et al.
patent: 5027762 (1991-07-01), Tokuyama
patent: 5058539 (1991-10-01), Saito et al.

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