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:
Feb. 25, 2003
Filed:
Sep. 17, 2001
Takehiko Suzuki, Anjo, JP;
Masashi Hattori, Anjo, JP;
Kazuo Takemoto, Anjo, JP;
Satoru Wakuta, Anjo, JP;
Takeshi Inuzuka, Anjo, JP;
Aisin Aw Co., Ltd., , JP;
Abstract
When a driver depresses an accelerator pedal to request a shift such as a downshift or the like, a maximum shift target changing rate (shift speed) of a CVT having a belt-type continuously variable shift apparatus is set based on the shift inertia of the CVT and the like. An assist torque is set by subtracting the normal torque of an internal combustion engine from a torque needed to achieve the maximum shift target changing rate. The assist torque and the torque outputtable from an electric motor based on the characteristic of the motor are compared. If the assist torque is greater than the motor torque, the target changing rate is restricted by an assist possible rate based on the ratio between the assist torque and the motor torque. The shift of the CVT is controlled by the target changing rate (shift speed). Thus, the apparatus allows a quick speed by assisting with a motor torque and, in a case where the assist torque from the motor is insufficient in quantity, allows a shift at a speed in accordance with the case, thereby resolving the degradation of acceleration feel caused by the shift inertia of the CVT.