Honda Motor Co., Ltd.

Honda Giken Kogyo Kabushiki Kaisha

Kiyoshi Handa

Yasuki Motozawa

Yutaka Hiki

Satoru Kawase

Norio Komura

Satoshi Kawasaki

Kazuyuki Kadowaki

Masayoshi Okamoto

Satoshi Taguchi

Shigehiro Yamaguchi

Yuzo Fujita

Kazuya Miwa

A volume estimating device includes: a gas density acquiring section that acquires a first gas density and a second gas density; an expansion rate acquiring section that acquires a first corrected expansion rate and a second corrected expansion rate; a filling amount acquiring section that acquires a total filling amount; and a volume estimating section that estimates a volume of a hydrogen tank based on a volume of a supplying portion, the first gas density, the second gas density, the first corrected expansion rate, the second corrected expansion rate, and the total filling amount.

Volume estimating device, hydrogen filling device, and volume estimating method

A hydrogen filling apparatus includes an initial pressure acquisition unit that acquires an initial pressure in a hydrogen tank, a history acquisition unit that acquires a filling history of a requesting vehicle, a determination unit that determines, based on the filling history, whether or not the hydrogen tank will overheat if the hydrogen tank is filled with hydrogen at a filling speed corresponding to the initial pressure, and a filling control unit that fills the hydrogen tank with hydrogen at a filling speed lower than the filling speed corresponding to the initial pressure, when it is determined that the hydrogen tank will overheat.

Hydrogen filling apparatus and hydrogen filling method

A gas filling method for filling a tank with gas by supplying the gas from an accumulator to the tank through a pipe includes: a temperature separation pressure detecting step of detecting whether the pressure in the tank has reached a temperature separation pressure during filling of the tank with the gas; and a pressure rise rate increasing step of filling the tank with the gas by increasing the pressure rise rate of the pressure in the tank after the pressure in the tank has reached the temperature separation pressure.

Gas filling method

In a gas filling method for filling a tank with gas by supplying the gas from an accumulator to the tank through a flow rate adjusting valve and a pipe, a target pressure rise rate, which is a temporal change of a target tank pressure, is set when the tank is filled with the gas. During filling of the tank with the gas, the flow rate adjusting valve is adjusted so that a dispenser pressure, which is a gas pressure in the accumulator, becomes a pressure that is higher than the target tank pressure and enables the target pressure rise rate to be maintained.

The disclosure provides a gas filling method. The gas filling method includes the following steps: an effective heat mass calculation step, which uses the heat capacity of the piping and the detection value of the gas temperature sensor to calculate the value of the effective heat mass related to the temporary pressure loss caused by the piping before gas-filling is started; a pressure loss parameter calculation step, which uses the detection value of the pressure sensor when the flow rate of the gas in the piping changes to calculate the value of the pressure loss parameter related to the pressure loss caused by the piping after the gas-filling is started; and a filling condition changing step, which changes the filling condition into a condition that is defined based on the value of the pressure loss parameter and gas-filling is continued.

To provide a gas filling method in which it is possible to estimate a volume of a tank with high accuracy even when the tank has a small volume. A hydrogen filling system includes a hydrogen station having a pressure accumulator of compressed hydrogen gas, a vehicle having a hydrogen tank, a connection tube system that connects the accumulator and the tank, and a flow rate sensor and a station pressure sensor provided on the connection tube system. A hydrogen gas filling method is a method of filling the tank with the hydrogen gas from the pressure accumulator and includes estimating a volume of the hydrogen tank based on detection values of the flow rate sensor and the station pressure sensor and a volume value of the connection tube system, after a start of filling of the hydrogen tank with the hydrogen gas from the pressure accumulator.

A hydrogen filling system of the present invention is provided with: a pressure accumulator; a pipe connecting the pressure accumulator and a hydrogen tank on a vehicle; a flow volume control valve, a pressure sensor, and a flow volume sensor with which the pipe is fitted; and a station ECU which operates the control valve under a predetermined filling condition. A gas filling method for filling hydrogen gas into the tank from the accumulator is provided with: a step of, after filling of the hydrogen gas has been started, calculating, using a detected value from the pressure sensor when the flow volume of hydrogen gas in the pipe has decreased, the value of a pressure loss coefficient correlated with a pressure loss caused in the pipe; and a step of changing the filling condition to a condition determined on the basis of the value of the pressure loss coefficient.

In order to provide a gas fueling method capable of suppressing overheating of a tank immediately after a start of fueling, in the gas fueling method, an accumulator and a hydrogen tank are coupled to each other with a gas flow passage. In a main fueling control at and after the timing t, a sensor-based value MAT of a temperature parameter of a measurement position Qis calculated on the basis of a detection value of a first station temperature sensor, and the fueling control is performed on the basis of the sensor-based value MAT. In an initial fueling control at the timing tto t, a prediction value MAT_pred of the temperature parameter is calculated at the timing ton the basis of an ambient temperature value, a mass flow rate value, and a heat capacity. The fueling control is performed on the basis of the prediction value MAT_pred.

Gas fueling method

A fuel cell system and a fuel consumption system verify the location of a filling failure at a time that a fuel gas filling process suffers from such a filling failure. Either one of encoded data indicating an infrared radiation signal related to the fuel gas filling process, which is sent from a vehicle to an external hydrogen station, and a drive signal, which comprises a train of binary pulses converted from the encoded data, is recorded in a recording unit of the vehicle.

Fuel cell system and fuel consumption system

A hydrogen gas filling method includes: a step for acquiring a pre-supply upstream pressure that is a pressure in a station side of a piping at time t, a step for starting the supply of hydrogen gas from the station at time tthat is after the pre-supply upstream pressure is acquired, a step for acquiring a post-supply upstream pressure at time tthat is immediate after the supply of hydrogen gas starts, a step for acquiring a start-time flowrate that is a flowrate of hydrogen gas at the same period as the step for starting, a step for estimating the pressure loss generated in the piping at the time of the supply by using the pre-supply upstream pressure, post-supply upstream pressure, and the start-time flowrate, and a step for stopping the supply of hydrogen gas so that a tank pressure conforms with a predetermined target pressure.

A control method for a hydrogen filling system is provided. A hydrogen filling system (S) includes a vehicle (V) that sends unique information (V, MC) of the hydrogen tank and detected values (T, P) of sensors, and a station () that determines a filling mode based on this information (V, MC, P, T), and fills hydrogen to the tank in this determined mode. A station ECU () calculates predicted values (T', P&#x2032;) of the temperature and pressure inside of the hydrogen tank during filling of hydrogen based on the unique information (V, MC), continuously confirms whether the detected values (T, P) of the sensors and the predicted values (T&#x2032;, P&#x2032;) match while filling fuel, and in the case of an inconsistency between the detected values and predicted values being confirmed, interrupts filling of fuel in the filling mode determined based on the unique information.

Control method for fuel filling system

Provided is a gas filling method capable of accurately determining the initial pressure in a tank while minimizing increase in temperature and pressure regardless of the capacity of the tank. The gas filling method for connecting a supply source to a tank via a piping, and filling the tank with the gas, the method includes: an initial-filling initiation step of opening a flow control valve provided in the piping to start initial filling; a pressure-variation acquisition step of obtaining a pressure variation per unit time at a predetermined detection point downstream of the flow control valve in the piping; an initial-pressure detection step of obtaining a pressure at the detection point at a time specified using the pressure variation, and considering that pressure as the initial pressure in the tank; and a main-filling initiation step of starting main filling using the initial pressure.

The present invention provides a fuel filling system and a fuel filling method thereof that can determine the validity of information transmitted from a vehicle side while filling fuel with high accuracy. A hydrogen gas filling method of a hydrogen filling system includes: a step of filling hydrogen gas from a hydrogen station to a hydrogen tank under a predetermined filling control law (S); and a determination step of determining whether a measurement error parameter corresponding to a difference between a filling amount of hydrogen gas calculated using information transmitted from the vehicle side and a filling amount of hydrogen gas calculated using a mass flow meter is within a predetermined permissible range (S). In the filling step, the filling control law is changed after starting the filling of hydrogen gas, according to a determination result obtained in the determination step (Sand S).

Fuel filling system and fuel filling method thereof

A fuel-cell vehicle includes a storage container, a fuel cell system, a state detector, a transmitter, a request detector, and a controller. The controller includes a signal generator and a communication starting device. The signal generator is configured to determine a transmission value indicating a physical state detected by the state detector so as to generate a data signal in accordance with the transmission value. The signal generator is configured to set the transmission value to a reference value preset based on the physical state detected by the state detector if the fuel cell system is not running and configured to set the transmission value to a value obtained by correcting the reference value so that an amount of the fuel gas to be monitored by an external filling device increases if the fuel cell system is running.

Fuel-cell vehicle

Provided is a gas tank wherein the pressure of gas filled in the tank hardly increases. A hydrogen tank () includes: a container main-body () into which hydrogen is filled; a first thermal-foam heat insulation layer () provided on the outer surface () of the container main-body (); a belt fitting region () virtually provided at a portion of the outer surface () of the container main-body (); a belt (), wherein the back surface () being a part of the surfaces of the belt () is in contact with the belt fitting region (), and wherein the belt () is fixed to a vehicle body () so that the container main-body () is fixed to the vehicle body (); and a second thermal-foam heat insulation layer () provided on a surface of the belt () other than the back surface ().

Growing community of inventors

Wako, Japan

Kiyoshi Handa