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:
Dec. 31, 2013
Filed:
May. 16, 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
An on-demand-type drive state control apparatus for a vehicle is provided. In the case where acceleration slippage occurs at drive wheels (rear wheels) of a vehicle when a drive system is in a two-wheel drive state, the drive system is switched from the two-wheel drive state to a four-wheel drive state. That is, the maximum transmittable torque of a multi-disc clutch mechanism increases from '0' to a predetermined value. In the four-wheel drive state, the maximum transmittable torque decreases stepwise from the present value by a predetermined value every time the vehicle travels over a predetermined distance in a state in which none of the wheels cause acceleration slippages. That is, the clutch drive current supplied to the multi-disc clutch mechanism decreases gradually (stepwise or in a plurality of steps), and the drive torque distributed to the front wheels (rear wheels) decreases (increases) gradually.