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:
Jun. 23, 2015
Filed:
Feb. 24, 2011
Kazutaka Kobayashi, Nishio, JP;
Yoshiyuki Aoyama, Nishio, JP;
Takeshige Miyazaki, Chiryu, JP;
Akihiro Ohno, Okazaki, JP;
Ryohei Shigeta, Anjo, JP;
Tomoaki Kato, Kariya, JP;
Go Nagayama, Toyama, JP;
Kazutaka Kobayashi, Nishio, JP;
Yoshiyuki Aoyama, Nishio, JP;
Takeshige Miyazaki, Chiryu, JP;
Akihiro Ohno, Okazaki, JP;
Ryohei Shigeta, Anjo, JP;
Tomoaki Kato, Kariya, JP;
Go Nagayama, Toyama, JP;
Aisin AI Co., Ltd., Nishio-Shi, JP;
JTEKT Corporation, Osaka-Shi, JP;
Abstract
A drive state control apparatus is applied to a vehicle which has not only a transfer including a multi-disc clutch mechanism but also a changeover mechanism interposed in an axle and which can be switched between 2WD and 4WD. When a 2WD-to-4WD changeover condition is satisfied, the multi-disc clutch is immediately switched from a 'decoupled state' to a 'coupled state.' Meanwhile, a connecting operation of the changeover mechanism is started upon establishment of a state in which left and right rear wheels have no acceleration slippage, and a state in which rotational speeds of first and second axles on opposite sides of the changeover mechanism are approximately equal to each other. In addition, in the case where the left and right rear wheels have acceleration slippage after the 2WD-to-4WD changeover condition has been satisfied, an E/G output reduction control is executed. Thus, the connecting operation can be performed smoothly.