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:
Oct. 05, 1993
Filed:
Jan. 17, 1992
Victor D Goeckner, Auburn, IL (US);
Ronald W Steffen, Springfield, IL (US);
DICKEY-john Corporation, Auburn, IL (US);
Abstract
A transmission controller is provided for use with a vehicle having a transmission including a plurality of gears, a hydraulic pressure controlled clutch, and a solenoid-actuated proportional valve for operating the clutch. The controller comprises a signal generating circuit for generating a controlled current signal for operating the solenoid-actuated proportional valve and a current monitoring circuit for producing a current signal corresponding to the current flow to each of the solenoid-actuated proportional valves. A vehicle monitor produces a threshold signal corresponding to a predetermined point at which the clutch begins to carry torque and a memory retains predetermined information corresponding to the current signals. A correlating control is responsive to the threshold signal for causing the memory to retain calibration information corresponding to the current signal produced when the predetermined threshold signal is produced, such that the retained information corresponds to a threshold value of the current to the solenoid-actuated proportional valve at which the corresponding clutch engages sufficiently to begin to carry torque.