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:
Jan. 21, 1997
Filed:
Jun. 06, 1995
Larry T Brown, Dearborn, MI (US);
Marvin P Kraska, Dearborn, MI (US);
Ford Motor Company, Dearborn, MI (US);
Abstract
A system for controlling a downshift in an automatic transmission having a torque converter includes friction elements for alternately producing a drive connection between components of a planetary gear set and disengaging the connection, a valve body adapted to connect a source of high pressure hydraulic fluid to the friction elements, a solenoid for controlling operation of the hydraulic valves, a microprocessor having a memory containing control algorithms, sensors producing signals representing the speed of the transmission output shaft and turbine shaft, a sensor producing a signal representing the position of an engine throttle, the control algorithms controlling a downshift of the transmission.