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:
Sep. 17, 2002
Filed:
Aug. 30, 2000
Asami Kubo, Yokohama, JP;
Hideyuki Tamura, Yokohama, JP;
Mikio Matsumoto, Yokohama, JP;
Kenichi Goto, Yamato, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
When a vehicle is decelerating a controller of a motor-generator ( ) computes a target charging current according to a charge state of a high voltage battery by a target charging current computing unit ( ), and limits this current by a first limiter ( ) having a limiter value. An electrical load current supplied to vehicle-mounted electrical loads is computed by an electrical load current detecting unit ( ). A target generation current produced by the motor-generator ( ) is computed by adding the target charging current and electrical load current, by a target generation current detecting unit ( ). This computed value is limited by a second limiter ( ) having a limiter value which varies according to an engine rotation speed, ON/OFF state of an air-conditioner and speed ratio. When the vehicle is decelerating the motor-generator ( ) is made to function as a generator driven by recovery energy, the high voltage battery and a low voltage battery for the vehicle-mounted electrical loads are charged without overcharging and excessive vehicle deceleration is prevented.