Internal-combustion engines – Lubricators – Crankcase – pressure control
Reexamination Certificate
2005-10-18
2005-10-18
Yuen, Henry C. (Department: 3747)
Internal-combustion engines
Lubricators
Crankcase, pressure control
C180S229000
Reexamination Certificate
active
06955150
ABSTRACT:
A method for managing oil temperature for a vehicle engine comprises the steps of (a) determining a preferred temperature window for oil in operation of the vehicle, comprising a first, lower temperature, and a second, higher temperature; (b) pumping oil from the vehicle engine to a control valve controlling oil passage into a radiator, and bypassing the radiator via a by-pass passage in the control valve more than seventy-percent of the oil to return to the vehicle engine without passing through the radiator upon cold start-up; (c) closing the bypass passage at the first oil temperature, forcing all oil entering the control valve to pass through he radiator before returning to the vehicle engine; (d) starting a forced-air fan at the second temperature to urge ambient air through air passages of the radiator, thereby enhancing ability of the radiator to cool the oil passing through.
REFERENCES:
patent: 4027643 (1977-06-01), Feenan et al.
patent: 4257554 (1981-03-01), Willingham
patent: 5701853 (1997-12-01), Takahashi
patent: 6076488 (2000-06-01), Yamagishi
patent: 6772824 (2004-08-01), Tsuruta
Ali Hyder
Boys Donald R.
Central Coast Patent Agency Inc.
Yuen Henry C.
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