Honda Motor Co., Ltd.

Honda Giken Kogyo Kabushiki Kaisha

Satoshi Aoyagi

Hibiki Saeki

Yoshinobu Hasuka

Takuya Shirasaka

Hiroyuki Abe

Yusuke Hasegawa

Hiroaki Takanohashi

Kazuo Kotaka

Kenichiro Ueda

Yoshikazu Murakami

Kuniaki Ojima

Yuji Matsumoto

Koichiro Miyata

Masanori Hayashi

Kazunori Watanabe

Akio Yamamoto

Kenichiro Kimura

Asao Uenodai

Sachito Fujimoto

Junji Uehara

Masami Ogura

Kazunori Fukuma

Takatsugu Koyama

Yutaka Asano

Shinji Kato

Yozo Takagi

Shinji Kamon

Takeshi Taguchi

Yukiko Yamamoto

Osamu Sukagawa

An electric power supply system can determine a sharing ratio of an electric power so as to increase and decrease an output electric power supplied by an electric power generator in accordance with an output electric power value required for the electric power supply system, in a fuel cell following region where a frequency of a magnitude of the electric power is equal to or higher than a predetermined value in a frequency distribution of a magnitude of the electric power, and can determine the sharing ratio of the electric power so as to increase an output electric power supplied by an electricity storage device, in an assist region where the frequency is lower than a predetermined value in the frequency distribution, and can prevent an excess of discharging from an electricity storage device.

Electric power supply system

The object of the present invention is to provide a fuel cell system enabling an improvement in fuel consumption and a method for controlling thereof. A fuel cell systemincludes a fuel cell, an air pump, an air supply channel, a hydrogen supply channel, a hydrogen tank, a hydrogen discharge channel, a hydrogen reflux channel, an air discharge channel, a purge valve, and a control device. The control deviceincludes a dilution judgment portionjudging whether dilution of hydrogen gas has been completed; an air increase portionfor increasing an air mass in the air discharge channel; a power production calculation portioncalculating an amount of power production based on the air mass increased; and a fuel cell drive portiondriving the fuel cellto produce electric power to obtain the amount of power production calculated.

Fuel cell system with dilution and purge control and control method thereof

A vehicular display apparatus of the invention includes a display portion that displays a predetermined graphic in accordance with a present consumption amount of energy used for moving a vehicle. The graphic displayed on the display portion changes at least one of a displayed size and a displayed color thereof in accordance with the consumption amount. The displayed size increases as the consumption amount increases. The displayed color is changed to have a longer wavelength of color as the consumption amount increases.

Vehicular display apparatus

A fuel cell vehicle has a fuel cell for generating electric power by being supplied with a reactive gas, an electric storage device, a first power supply line connected to the fuel cell, a second power supply line connected to the electric storage device, and a main DC-to-DC converter for performing bidirectional voltage conversion between the first power supply line and the second power supply line, an electric motor to propel the vehicle and a first electric accessory connected to the first power supply line, a second electric accessory having at least a portion connected to the second power supply line.

Fuel cell vehicle, and method of supplying electric power

An electric system has a fuel cell for generating electric power by being supplied with a reactive gas, an electric storage device having a voltage lower than a voltage output from the fuel cell, a first power supply line connected to the fuel cell, a second power supply line connected to the electric storage device, a first electric accessory serving as at least part of a fuel cell accessory for operating the fuel cell, a first DC-to-DC converter for performing bidirectional voltage conversion between the first power supply line and the second power supply line and a second DC-to-DC converter for lowering a voltage for supply electric power to the first electric accessory.

Electric system for fuel cell, fuel cell vehicle, and method of supplying electric power

A fuel cell system includes a fuel cell, a battery, and a DC/DC converter capable of connecting the fuel cell and the battery on a power feeding circuit. A method of starting operation of the fuel cell system includes the steps of connecting a bypass line connected to a battery for bypassing the DC/DC converter to the power feeding circuit, and directly supplying electrical energy from the battery to an air compressor of an oxygen-containing gas supply apparatus through the bypass line in a state where the fuel cell is disconnected from the power feeding circuit.

Method of starting operation of fuel cell system

An object of the present invention is to provide a fuel cell system in which a noise and a vibration of a compressor can be suppressed. In order to achieve the above object, the present invention provides a fuel cell system including a fuel cell; a compressor for supplying an oxidant gas to the fuel cell, having a first rotational speed region within which as a rotational speed increases, a noise becomes greater than a predetermined value, and a second rotational speed region within which as the rotational speed increases, the noise becomes equal to or less than the predetermined value; and a compressor controller for controlling the compressor by calculating a command rotational speed for commanding the compressor based on a required amount of power generation.

Fuel cell system with suppressed noise and vibration

A control device for starting a fuel cell is provided which is capable of preventing an excessive reduction of the terminal voltage of the fuel cell. A primary precharge portion, provided with a high voltage switch and a current limiter, is disposed at the output portion of a power storage unit, and a secondary precharge portion, provided with a DC-DC chopper and a control portion, is disposed at the output side of a fuel cell. The primary precharge portion controls the output current to flow in a path via a resistor having a predetermined resistance. The secondary precharge portion controls an output current of the fuel cell based on a current command value IFCCMD for the fuel cell.

Control apparatus for starting fuel cell vehicle

A management ECU of a control unit predicts the reduction degree of a system voltage according to an operational state of a motor based on the temperature of a fuel cell and a number of rotations of the motor, sets motor output restriction start voltage and motor output restriction end voltage which are threshold values of the system voltage for triggering an execution start and an execution end of a processing to restrict an output of the motor, and outputs them to a motor ECU. The motor ECU sets an output restriction coefficient that is a restriction rate in restricting the output of the motor based on a detected value of the system voltage and the motor output restriction start voltage and the motor output restriction end voltage, and restricts the output of the motor.

Control apparatus for fuel cell vehicle and control method for fuel cell vehicle

A fuel cell vehicle system includes: a propulsion motor capable of driving a vehicle; a fuel cell which generates electric power by supplying a reactant gas to give an electrochemical reaction; an energy storage device which is charged by a generated output of the fuel cell and regenerative electric power of the propulsion motor; an output control device which controls an output current of the fuel cell; and a control device which calculates the regenerative electric power which can be generated by a regenerative operation of the propulsion motor as well as a chargeable power which can be charged to the energy storage device, controls the output control device so that the output current of the fuel cell is restricted when the chargeable power is less than the regenerative electric power, and controls the output control device so that restriction on the output current of the fuel cell is canceled when the chargeable power is equal to or greater than the regenerative electric power.

Fuel cell vehicle system

This fuel efficiency display device for a fuel cell vehicle includes: a first interval vehicle efficiency obtaining device which obtains a first interval vehicle efficiency being a fraction of a generated traveling energy with respect to a consumed fuel amount in a predetermined first time-interval; a second interval traveling energy obtaining device which obtains a second interval traveling energy being a traveling energy generated in a predetermined second time-interval which is shorter than the first time-interval; and a second interval fuel efficiency obtaining device which obtains a second interval fuel efficiency being a fuel efficiency in the second time-interval, based on at least the first interval vehicle efficiency and the second interval traveling energy.

Fuel efficiency display device for fuel cell vehicle, and fuel efficiency displaying method for fuel cell vehicle

This control method for a fuel cell vehicle includes: a target motor output power obtaining step which obtains a target motor output power corresponding to an accelerator opening degree; and a high output power control step which controls operations of a first DC-DC converter and a second DC-DC converter, such that an output voltage of a power source becomes equal to or larger than a predetermined voltage that is required for securing a desired motor output power, when the target motor output power is larger than a predetermined output power threshold value.

Control method for fuel cell vehicle, and fuel cell vehicle

Control device for starting fuel cell vehicle

Disclosed are systems and method for charging a fuel cell vehicle comprising a fuel cell, a rotating load, an energy storage, a contactor, a DC-DC converter, and a control unit. When charging of the energy storage is performed, the DC-DC converter connected to the energy storage is placed in a direct connection mode wherein the input voltage and the output voltage of the DC-DC converter are the same without voltage adjustment for directly charging regeneration electrical energy from a motor of the rotating load to the energy storage.

Growing community of inventors

Shimotsuke, Japan

Satoshi Aoyagi