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.

Date of Patent:
Aug. 12, 1997

Filed:

May. 30, 1995
Applicant:
Inventors:

Kazuo Ooyama, Saitama, JP;

Tomohiro Mihara, Saitama, JP;

Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02P / ;
U.S. Cl.
CPC ...
477 15 ; 477-3 ; 477-8 ; 477120 ; 477905 ; 180 658 ;
Abstract

A shift map used for controlling the shifting of a transmission in an electric vehicle based on the accelerator opening degree and the vehicle speed as parameters has a medium shift stage region in a higher shift stage region established in a medium vehicle speed operation region at a lower accelerator opening degree. When the vehicle travels down a downward slope at the lower accelerator opening degree while generating a regenerative braking force, the transmission is downshifted from a higher shift stage to a medium shift stage to increase the regenerative braking force, thereby providing an enhancement in braking feeling and an improvement in energy recovery efficiency.


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