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. 25, 2003
Filed:
Sep. 29, 2000
Satoshi Takizawa, Yokohama, JP;
Tateki Jozaki, Isehara, JP;
Masato Koga, Atsugi, JP;
Masatoshi Akanuma, Fujisawa, JP;
Mitsuru Watanabe, Hadano, JP;
Shigeki Shimanaka, Hadano, JP;
Hiroyasu Tanaka, Zama, JP;
Junya Takayama, Oomiya, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
After an engine ( ) has started, a controller ( ) starts determining whether lockup should be prohibited or permitted based on the cooling water temperature of an engine ( ) or the oil temperature of a transmission ( ). Once it has been determined that lockup should be permitted, the controller ( ) stops determining whether lockup should be prohibited or permitted until the next time the engine ( ) is started. In this way, once the conditions for determining that lockup should be permitted hold, lockup prohibition or permission based on the engine cooling water temperature or transmission oil temperature is no longer determined, so repeat engaging and disengaging of the lockup clutch ( ) due to fluctuations of engine cooling water temperature or transmission oil temperature, is prevented.