Patent ID: 7025032

Claim:
An oil system for supplying and controlling oil flow in an internal combustion engine having a camshaft timing device, comprising: an oil pump for supplying pressurized lubricating oil to the engine and the variable cam timing device: an oil circuit connecting said oil pump with the variable camshaft timing device and a main oil gallery of the engine via a valve apparatus, said valve apparatus responding to oil pressure near the outlet of said oil pump wherein said valve apparatus causes oil to flow to said main oil gallery when oil pressure is above a predetermined pressure and substantially shuts off oil flow through said valve apparatus to said main gallery when oil pressure is below said predetermined pressure a solenoid valve in an oil passage between said oil pump and the variable camshaft timing device; and a controller operably connected to the engine and the solenoid valve, said controller allowing oil to flow to said variable camshaft timing device when an adjustment of the variable camshaft timing device is desired.