The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 06, 1988
Filed:
Jan. 08, 1987
Richard D Moan, Livonia, MI (US);
Ford Motor Company, Dearborn, MI (US);
Abstract
In an automotive automatic transmission, a torque converter lockup control system includes a main regulator valve connected to the discharge of a hydraulic pump for supplying converter feed pressure between the plates of the lockup clutch in accordance with the magnitude of line control pressure produced as a result of a line control pressure command applied to the windings of a solenoid-operated valve in response to a computer command signal. A converter cooler circuit includes a relief valve that opens at a relatively low pressure and communicates through a clutch control valve to the torque converter casing in accordance with the magnitude of lockup clutch control pressure produced by a solenoid-operated lockup clutch control valve. A converter regulator valve regulates converter feed pressure by opening the connection to the relief valve as lockup clutch pressure rises.