Honda Motor Co., Ltd.

Honda Giken Kogyo Kabushiki Kaisha

Jiro Fujimoto

Noriaki Fujii

Shuichi Kazuno

Toshihiro Yamaki

Kosuke Higashitani

Keiko Yoshida

Minoru Nakamura

Shigekazu Tanaka

Yasushi Kojima

Akinori Maezuru

Taichi Yoshikawa

Koichi Eto

Keitaro Nakanishi

In a control method for a fuel cell system, a fuel cell side converter that is provided between a fuel cell and an inverter is controlled to step up a fuel cell voltage to an inverter terminal voltage supplied to the inverter. A margin voltage is set to guarantee step-up operation or interruption of operation of the fuel cell side converter. A directly connected state or a voltage transforming state regarding an operation state of an energy storage device side converter is selected such that the inverter terminal voltage is higher than a sum of the margin voltage and the fuel cell voltage. The energy storage device side converter does not transform the energy storage device voltage in the directly connected state. The energy storage device side converter transforms the energy storage device voltage to the inverter terminal voltage in the voltage transforming state.

Fuel cell system control method and fuel cell vehicle

In a variable stroke engine comprising a plurality of links () connecting a piston () with a crankshaft (), a control member () disposed on an engine main body so as to be moveable in two directions over a prescribed range relative to the engine main body, a control link () connecting one of the plurality of links with the control member and an actuator (AC) for displacing the control member, the actuator comprises a ratchet mechanism that utilizes a force transmitted from the piston to the control member as an actuating force for the control member. By providing a spring member (, SP,) that applies a biasing force to the control member, an appropriate actuating force can be applied to the control member in either direction.

Variable stroke engine

An electromagnetic valve unit in an internal combustion engine is controlled by determining a difference between the output of a displacement sensor when a valve head is in an open position and the output of the displacement sensor when the valve head is in a closed position in each period of an opening and closing action of the valve head. The difference corresponds to a full displacement of the valve head between the open position and the closed position. The electromagnetic valve unit is also controlled by establishing, using the difference, a threshold for the output of the displacement sensor which corresponds to a predetermined displaced position of the valve head which is determined based on a proportion of the full displacement, and controlling energization of the valve-opening electromagnet and/or the valve-closing electromagnet depending on whether the output of the displacement sensor has reached the threshold or not upon the opening and closing action of the valve head immediately after the threshold is established.

Method of controlling electromagnetic valve unit for internal combustion engines

Growing community of inventors

Wako, Japan

Jiro Fujimoto