Toyota Jidosha Kabushiki Kaisha

Robert Boschgmbh

Katsuhiko Oshikawa

Hiromasa Nishioka

Hiroshi Otsuki

Junichi Matsuo

Yoshihisa Tsukamoto

Shigeki Nakayama

Daichi Imai

Yuichi Sobue

Kou Sugawara

Keigo Suematsu

Takahide Izutani

Tatsuaki Yokoyama

Atsushi Matsuba

Shuji Hirakata

Takamitsu Asanuma

Masaaki Matsusue

Kazuhiro Umemoto

Osamu Yumita

Katsuhiko Hirose

Nobuo Watanabe

Hiroshi Fujitani

Claudio Baldizzone

Hideo Naohara

Syuuji Hirakata

Takumi Kuwahara

Yoshifumi Hirao

Shogo Takamuku

A wall flow type particulate filter is arranged inside the exhaust passage of an internal combustion engine where combustion is performed under an excess of oxygen. The particulate filter carries a solid acid. The solid acid has an acid strength which is higher than the acid strength of sulfurous acid and lower than the acid strength of sulfuric acid. To remove the ash from the particulate filter, ash atomization processing for rendering the state of the particulate filter a state where the exhaust gas which flows into the particulate filter is lowered in concentration of oxygen and the particulate filter is raised in temperature is temporarily performed.

Exhaust purification system for internal combustion engine

A wall flow type particulate filter is arranged inside the exhaust passage of an internal combustion engine where combustion is performed under an excess of oxygen. The particulate filter carries a solid acid. The solid acid has a Hammett acidity function smaller than &#x2212;0.83 and larger than &#x2212;12 in the standard state. To remove the ash from the particulate filter, ash atomization processing for rendering the state of the particulate filter a state where the exhaust gas which flows into the particulate filter is lowered in concentration of oxygen and the particulate filter is raised in temperature is temporarily performed.

A wall flow type particulate filter is arranged inside the exhaust passage of an internal combustion engine where combustion is performed under an excess of oxygen. The particulate filter carries an ash atomization agent. To remove the ash from the particulate filter, ash atomization processing for rendering the state of the particulate filter a state where the exhaust gas which flows into the particulate filter is lowered in concentration of oxygen and the particulate filter is raised in temperature is temporarily performed.

A wall flow type particulate filter () adapted to be arranged in an exhaust passage of an internal combustion engine in which combustion is performed in an excess of oxygen carries a solid acid. The solid acid has an acid strength which is higher than the acid strength of sulfurous acid and lower than the acid strength of sulfuric acid.

Particulate filter

An exhaust purification system of an internal combustion engine, which includes: a silver-alumina-based catalyst, which is arranged in an engine exhaust system and, when an air-fuel ratio of exhaust gas is leaner than a stoichiometric air-fuel ratio, releases adsorbed NOat a first set temperature and adsorbed NO at a second set temperature, a secondary air feed passage configured to suppress a temperature rise of the silver-alumina-based catalyst; and an electronic control unit, that: controls the air flow through the secondary air feed passage to: when the silver-alumina-based catalyst has reached a third set temperature, suppress a temperature rise of the silver-alumina-based catalyst to maintain the silver-alumina-based catalyst near the third set temperature, and then lift the suppression of the temperature rise of the silver-alumina-based catalyst so that at least part of the NO adsorbed at the silver-alumina-based catalyst, is oxidized to NOto be adsorbed at the silver-alumina-based catalyst.

Exhaust purification system of internal combustion engine

An exhaust purification system of an internal combustion engine of the present invention comprises a silver-alumina-based catalyst device arranged in the engine exhaust system. When a temperature of the silver-alumina-based catalyst device becomes a second set temperature Tlower than a first set temperature Tat which the silver-alumina-based catalyst device releases NO, and releases NO, the silver-alumina-based catalyst device is heated such that a temperature elevation rate thereof is increased to make the temperature T of the silver-alumina-based catalyst device be a third set temperature Tbetween the first set temperature Tand the second set temperature T

A method of removing ash from a wall flow type particulate filter which is arranged in an exhaust passage of an internal combustion engine in which combustion is performed in an excess of oxygen for trapping particulate matter in exhaust gas, using a solid acid which is carried on the particulate filter, renders the state of the particulate filter a state where the exhaust gas which flows into the particulate filter is lowered in concentration of oxygen and the particulate filter is raised in temperature, and then renders the state of the particulate filter a state where the exhaust gas which flows into the particulate filter in an oxidizing atmosphere contains SOx.

Method of removing ash from particulate filter

Disclosed is a hydrogen supply apparatus which can mix an odorant with hydrogen gas even at a low temperature and can detect the leakage of the hydrogen gas. The apparatus comprises a gas storage means for storing hydrogen gas therein, an odorant-addition means for adding an odorant to the hydrogen gas fed from the gas storage means, and a temperature control means for controlling the temperature of at least one of the hydrogen gas stored in the gas storage means, the hydrogen gas fed from the gas storage means and the odorant.

Hydrogen supply apparatus and fuel gas supply apparatus

The present detector for detecting sulfur components includes a storage portion for storing SOx and NOx in the exhaust gas passing through an exhaust passage, in which the more an amount of stored SOx increases, the more an amount of NOx that can be stored decreases, estimates the amount of stored SOx on the basis of an amount of NOx stored in the storage portion, and detects an integrated amount of SOx passing through the exhaust passage during a given period or an value on the basis of the integrated amount. In the present detector, the estimating of the amount of stored SOx for detecting the integrated amount of SOx or the value on the basis of the integrated amount is prohibited when a current amount of NOx that can be stored is not stored in the storage portion.

Detector for detecting sulfur components

The present detector for detecting sulfur components includes a storage portion for storing SOand NOin the exhaust gas passing through an exhaust passage, in which the more an amount of stored SOincreases, the more an amount of stored NOdecreases, and which does not release SObut release NOat a set temperature, and a temperature sensor, estimates the amount of stored SOon the basis of a relationship between, after the storage portion becomes the set temperature by heating, a heating pattern of the storage portion and temperature change of the storage portion measured by the temperature sensor, and detects an integrated amount of SOpassing through the exhaust passage during a given period or an value on the basis of the integrated amount.

A detector for detecting sulfur components having a storage portion for storing SOand NOin the exhaust gas passing through an exhaust passage and a temperature sensor for measuring a temperature of the storage portion. The detector includes a heater for heating the storage portion and determines the current heat capacity (C) of the storage portion on the basis of an increase in (T&#x2212;T) the temperature of the storage portion measured by the temperature sensor and a quantity of heat (QH) generated by the heater when the heater heats the storage portion.

In an exhaust purification system of an internal combustion engine of the present invention, a silver-alumina-based catalyst device and NOreducing catalyst device are arranged in the engine exhaust system. When a temperature of the silver-alumina-based catalyst device becomes a first set temperature T1 on the high temperature side, NOreleased from the silver-alumina-based catalyst device is reduced by reducing material to be purified in the NOreducing catalyst device. When the temperature of the silver-alumina-based catalyst device becomes a second set temperature on the low temperature side, NOreleased from the silver-alumina-based catalyst device is reduced by reducing material to be purified in the NOreducing catalyst device.

The present invention provides a technology related to a fuel cell system capable of adjusting a discharge amount of an odorant discharged to an outside of a moving body according to a state of the moving body. The fuel cell system mounted to a moving body includes: a fuel cell which generates electric power by electrochemically reacting a hydrogen gas with an oxidation gas; and a adjusting portion which adjusts an amount of an odorant to be discharged to an outside of the moving body according to a state of the moving body, the odorant being included in an anode off-gas discharged from an anode side of the fuel cell.

Fuel cell system

A fuel cell system that can dispose of an odorant through the use of a simple configuration and assure enhanced hydrogen safety. A hydrogenation device is positioned between a fuel tank and a fuel cell. The hydrogenation device incorporates a hydrogenation catalyst for hydrogenating the odorant.

A hydrogen supply device and a method of supplying hydrogen are provided in which a hydrogen gas odorized with the odor agent is supplied by applying heat to a granular mixture of hydrogen storage glass beads and odor agent encapsulating capsules using irradiation with infrared light emitted from a light source.

Growing community of inventors

Tokyo, Japan

Katsuhiko Oshikawa