Honda Giken Kogyo Kabushiki Kaisha

Masafumi Usuda

Morio Kayano

Iwao Shimane

Hisahiro Ito

Shigeru Yanagisawa

A control system in an electric vehicle includes a power driver control device for controlling a driving system including the electric motor, a management control device for controlling a power distributing system including the battery, a brake control device for controlling a braking system including the brake device. These control devices are disposed in a distributed arrangement in the vehicle body. A power train collective-control device administers the controlling of a transmission system; collectively controls and monitors the power driver control device, the management control device, and the brake control device, and also backs up any of these control devices which is out of order, i.e., has developed trouble. Thus, it is possible to provide improvements in processing speed and reliability of the control system in the electric vehicle.

Control system in electric vehicle

A maximum output power and a discharged electric power amount from the battery is calculated; a future variation in maximum output power relative to the discharged electric power amount is evaluated, thereby determining a remaining capacity of the battery on the basis of the electric power amount discharged until the maximum output power reaches a preset lowest maximum-output power. Thus, the remaining capacity of the battery can be correctly detected, irrespective of the charged state, the discharge rate, the degree of deterioration of the battery and the like.

Growing community of inventors

Saitama-ken, Japan

Masafumi Usuda