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. 05, 2005
Filed:
Sep. 12, 2003
Satoshi Segawa, Atsugi, JP;
Kazutaka Adachi, Yokohama, JP;
Satoshi Segawa, Atsugi, JP;
Kazutaka Adachi, Yokohama, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
A torque converter () comprises a pump impeller () and turbine runner () which transmit a torque via a fluid, and a lockup clutch () which engage the pump impeller () and turbine runner () according to an oil pressure. The pump impeller () is connected to an engine (), and the turbine runner () is connected to an automatic transmission (). An oil pressure control valve () supplies oil pressure to the lockup clutch () according to a signal from the controller (). The controller () calculates a rotation speed increase rate of the turbine runner () (S), and controls the oil pressure of the oil pressure control valve () under a pressure increase rate which increases as the rotation speed increase rate (S) increases, thereby preventing rotation speed fluctuations of the engine () accompanying lockup of the lockup clutch ().