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:
Aug. 19, 1997
Filed:
Oct. 31, 1995
Jaeduk Jang, Kyungki-do, KR;
Kibeen Lim, Kyungki-do, KR;
Hyundai Motor Co., Seoul, KR;
Abstract
Disclosed is a hydraulic control system of an automatic transmission used in a vehicle, which comprises a torque converter for transferring the engine power to the input shaft of the transmission, an oil pump for pumping an oil by means of the engine power, a pressure regulation means for regulating the line pressure produced by the oil pump according to the forward and reverse drive and the amount of a throttle opening, a damper clutch working control means for changing the direction of the pressure delivered to the torque converter in order to increase the power transfer rate of the torque converter, a shift pressure control means for delivering the pressure supplied from the pressure regulation means to the first, second, third, fourth, fifth, sixth and seventh solenoid valves controlled on/off by a transmission control unit to adjust the control pressure during shifting operation, and a pressure distribution means for selectively distributing the pressure supplied from the pressure control means during shifting among the friction elements according to the shifting stages.