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:
Mar. 18, 2008
Filed:
Jun. 08, 2005
Akira Higashimata, Hadano, JP;
Satoshi Segawa, Atsugi, JP;
Akira Higashimata, Hadano, JP;
Satoshi Segawa, Atsugi, JP;
Nissan Motor Co., Ltd., Yokohama-shi, JP;
Abstract
A controller () controls the engaging force between a pump impeller () connected to an engine () and a turbine runner () connected to an automatic transmission (). The controller () first performs feedforward control of the engaging force. The controller () determines a reference value and a target rotation speed based on the capacity characteristics of the torque converter (), and if the rotation speed of the engine () becomes less than the reference value, performs feedback control of the engaging force so that the deviation between the target rotation speed and the rotation speed decreases. When a predetermined condition is satisfied, the controller () changes over from feedforward control to feedback control, even if the rotation speed of the engine () is not less than the reference value. As a result, the control precision of feedback control when performing a slip lock-up, is increased.