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:
Apr. 02, 1991
Filed:
May. 24, 1989
Kourosh Mehr-Ayin, Vista, CA (US);
Paul A Schuh, San Diego, CA (US);
Sundstrand Corporation, Rockford, IL (US);
Abstract
A control system (100) for a hydraulically controlled clutch (18) for coupling a source of rotary power (12) to a load (102) for accelerating the load from a first velocity to a second velocity within a time measured from a beginning of the acceleration and ending between first and second times measured from the beginning of acceleration with the load being variable during acceleration of the load from the first velocity to the second velocity in accordance with the invention includes a source of pressurized hydraulic fluid (38), a servo valve (42), having an inlet coupled to the source of pressurized fluid and an outlet coupled to the hydraulically controlled clutch, the servo valve being responsive to a control signal to vary the pressure of hydraulic fluid applied to the hydraulically controlled clutch to vary the coupling between the source of rotary power and an output shaft (22) which is coupled to the load, a speed sensor (112) for producing a speed signal proportional to the speed of the output shaft; a stored program (108) controlling a programmed acceleration of the load from the first velocity to the second velocity within a time interval measured from the beginning of the acceleration and ending between the first and second times; a controller (110), responsive to the stored program and the speed signal, for producing the control signal which is a function of a difference (E) between the velocity signal and a velocity controlled by the stored program.