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. 23, 2011
Filed:
Mar. 15, 2007
Kaori Tanishima, Isehara, JP;
Kaori Tanishima, Isehara, JP;
Nissan Motor Co., Ltd., Yokohama-shi, Kanagawa, JP;
Abstract
A mode switching controlling device and method switches a hybrid drive (HEV) mode to an electric drive (EV) mode without engine stoppage shock. A fourth-to-fifth speed upshifting command is generated due to reduction in an accelerator opening. Then, an HEV-to-EV-mode switching command is generated. A command pressure of a direct clutch is set to 0, and an actual-pressure reduction disengages the direct clutch, causing an automatic transmission to be in a neutral state. When a first time elapses from generation of the switching command, a first clutch command pressure is set to its maximum value, and the first clutch disengages by an actual pressure increase. When a second time elapses, the engine is stopped by reducing engine torque to perform mode switching. A front brake command pressure is set to a precharge pressure when the second time elapses and to its maximum value at a later time when a gear-switching rotation matching controlling operation of a motor-generator is ended, so that the front brake is engaged due to an actual pressure increase for upshifting from the fourth to fifth speed.