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. 06, 1998
Filed:
May. 10, 1996
Akihito Iwata, Hekinan, JP;
Yoshihisa Yamamoto, Nishio, JP;
Kazuhiro Mikami, Kariya, JP;
Masahiro Hayabuchi, Anjo, JP;
Aisin Aw Co., Ltd., , JP;
Abstract
A control system for an automatic transmission, has a fluid transmission unit for transmitting the rotation of an engine to a speed change unit; a clutch adapted to be applied when a forward running range is selected to transmit the rotation of the fluid transmission unit to the transmission mechanism of the speed change unit; a stopped state detector for detecting a stopped state of a vehicle wherein the stopped state is defined as a forward running range being selected, the throttle opening being fully closed, the brake pedal being depressed, and the vehicle speed being substantially zero; engine speed detector for detecting the engine speed; clutch operation force generating means for generating the application force of the clutch; and a control unit. The control unit releases the clutch by reducing the engaging force of the clutch when the stopped state of the vehicle is detected by the stopped state detecting means. The engine RPM when the clutch is released is stored as an initial engine RPM in storage means so that a neutral ending engine RPM is set on the basis of the initial engine RPM. The clutch is applied by strengthening its application force if the stopped state of the vehicle is not detected when the clutch is released and if the engine RPM exceeds the neutral ending engine RPM.