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. 19, 1991
Filed:
Oct. 20, 1989
Applicant:
Inventors:
Koji Tanaka, Tokyo, JP;
Takashi Shima, Tokyo, JP;
Assignee:
Isuzu Motors Limited, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B60T / ; B60T / ;
U.S. Cl.
CPC ...
303-3 ; 180165 ; 188159 ; 303 20 ; 303100 ;
Abstract
A regenerative braking system for a car in which when a hydraulic circuit is not operated, effective maximum displacement controlling current and minimum displacement controlling current for a pump/motor in the hydraulic circuit are studied on the basis of a variation of the sensed displacement angle when the maximum permissible current and the minimum operating current previously given to a displacement angle controlling electromagnetic proportional control valve are respectively decreased and increased stepwise. A displacement controlling current per a unit capacity for the control valve is determined.