Toyota Jidosha Kabushiki Kaisha

Toyota Jidosha Kogyo Kabushiki Kaisha

Nippon Soken, Inc.

Nippondenso Co., Ltd.

Matsushita Electric Industrial Co., Ltd.

Aisin Seiki Kabushiki Kaisha

Toyota Jidosha Kabushiki Kasiha

Tokyo Jidosha Kogyo Kabushiki Kaisha

Toyoto Jidosh Kabushiki Kaisha

Daisaku Sawada

Hiroshi Yaguchi

Kenji Goto

Tadashi Hattori

Takashi Shigematsu

Takashi Shigematu

Eiichi Kamiyama

Daisuke Akihisa

Yuji Takeda

Hiroaki Yamaguchi

Shinichi Mitani

Rentaro Kuroki

Minoru Nishida

Masaaki Katayama

Akira Kato

Yukihiro Nakasaka

Setsuo Tokoro

Masaki Mitsuyasu

Toshiharu Iwata

Tomoyuki Watanabe

Siniti Mukainakano

Hisasi Kawai

Tokio Kohama

Hideki Obayashi

Toshikazu Ina

Masami Sugaya

Takashi Sasajima

Shizuo Sasaki

Yoshinobu Soga

Takeshi Takahashi

Yoshinori Ootsuka

Yasutoshi Yamada

Nobuyuki Oota

Eiji Hashimoto

Motonobu Akaki

Teruyoshi Ito

Yoshiyuki Tamaki

Juhei Takahashi

Kenzo Miura

Ryuji Imai

Shinya Hirota

Takashi Yamamoto

Manabu Tateno

Yutaka Suzuki

Nobuhito Hobo

Satoshi Watanabe

Susumu Okawa

Naoto Hisaminato

Osamu Ito

Katsumi Kouno

Takashi Kawasaki

Hideo Yamashita

Kazuhisa Yano

Narihito Tatsuda

Satoshi Komori

Tadayori Makino

Takashi Shigemaut

[Subject] A low-cost and brief method to detect an airtight failure in a working-gas circulating type gas engine with sufficient accuracy and a working-gas circulating type gas engine using the method should be provided. [Means for Solution] In a working-gas circulating type gas engine, an extra predetermined quantity 1 of at least one of fuel gas, oxidizer gas, and working gas is supplied as surplus gas into a circulation passage. Based on the difference between this predetermined quantity 1 and increment of this predetermined quantity 1 and the increment of the quantity of the gas in the circulation passage separately detected by a gas quantity detecting means, the existence of an airtight failure in the engine is judged.

Detection method of airtight failure in working-gas circulating type gas engine, and working-gas circulating type gas engine using the method

A heat exchanger for a stirling engineA of a twin-cylinder &#x3b1; type includes a heat transfer tube groupA formed with heat transfer tubesA causing a working fluid of the stirling engineA to flow between a high-temperature cylinderand a low-temperature cylinderarranged linearly and parallel to each other in the stirling engine. The heat transfer tube groupA includes a rising section Gextending upward, a falling section Gextending downward, and a connecting section Gconnecting the rising section Gand the falling section Gin a turn-back manner, where the heat transfer tube groupA is regarded as extending from one end or the other end thereof.

Heat exchanger for stirling engine

A working gas circulation type engine includes a combustion chamber in which a working gas having a ratio of specific heats higher than that of air can be expanded by combustion of a fuel, a circulation path capable of circulating a gas containing the working gas from a gas exhaust side to a gas suction side of the combustion chamber and supplying the gas containing the working gas to the combustion chamber again, and a control device that changes a control parameter for controlling the combustion of the fuel based on a ratio of specific heats of the gas circulating in the circulation path. Therefore, there can be provided the working gas circulation type engine capable of obtaining a stable output.

Working gas circulation type engine

A cooling systemA includes an internal combustion engine, a pump, a radiator, a main passage section, a stirling engine, a branch passage sectionbranching from the main passage sectionat a first connection point Pand joining a downstream part of the main passage sectionfrom the first connection point Pat a second connection point P, and a thermostat. The first connection point Pand the second connection point Pare provided in a part of the main passage sectionbetween the radiatorand the pump. The thermostatis provided in another part of the main passage sectionbetween the first connection point Pand the second connection point P

Cooling system

In a working gas circulation engine, water vapor contained in exhaust gas after combustion is separated and removed at higher efficiency as compared with the conventional technology, the influence of remaining water vapor is prevented from reducing the ratio of specific heats of working gas and deteriorating the thermal efficiency of the engine. A working gas circulation engine which comprises a circulation passage part which connects an inlet port communicated to a combustion chamber and an exhaust port communicated to the combustion chamber in the exterior of the combustion chamber, supplies fuel, oxygen, and working gas to the combustion chamber to burn the fuel in the combustion chamber, and supplies the working gas contained in the exhaust gas discharged through the exhaust port from the combustion chamber to the combustion chamber through the circulation passage part and the inlet port. The working gas circulation engine comprises a water vapor condensing means which interposes in said circulation passage part and has an entrance part and an exit part, the water vapor condensing means removes water vapor from gas flowing thereinto through the entrance part from said circulation passage part by condensing water vapor contained in the gas and discharges the gas from the exit part to said circulation passage part, a gas pressure detecting means to detect the pressure of the gas flowing into said water vapor condensing means, and a gas pressure adjusting means to adjust the pressure detected by said gas pressure detecting means.

Working gas circulation engine

In a case of performing a static pressure gas lubrication by a stirling engine provided with a pair of cylinders of a high-temperature-side cylinderand a low-temperature-side cylinder, a stirling engine gas lubrication structure is provided with an introduction pipeA for introducing a working fluid existing within a low-temperature working space into at least an inside of an expansion pistonof the expansion pistonand a compression piston, the low-temperature working space being included in a working space where the working fluid circulates between the cylindersand, a temperature of the working fluid in the low-temperature working space lower than that of the working fluid in a working space of a high-temperature side cylinderin a driving state.

Stirling engine gas lubrication structure

An exhaust heat recovery system includes a plurality of Starling engines. Heaters of the Starling engines are disposed in an exhaust passage that is a heat medium passage. An inside of the exhaust passage is partitioned with a partitioning member into a first exhaust passage and a second exhaust passage. The heater of the Starling engine disposed on an upstream side in a flowing direction of exhaust gas is provided in the first exhaust passage, and the heater of the Starling engine disposed on a downstream side in the flowing direction of the exhaust gas is provided in the second exhaust passage.

Exhaust heat recovery system

A gas lubrication structure is provided with a high-temperature-side cylinder, an expansion piston lubricated relative to the high-temperature-side cylinder by gas, and a layer provided to the outer peripheral surface of the expansion piston and composed of a material flexible and having a higher linear expansion coefficient than the base material of the expansion piston. The thickness of the layer under normal temperatures is not less than the size of the clearance formed between the layer and the high-temperature-side cylinder. Also, even if the layer is thermally expanded under use conditions, the layer under normal temperatures has a thickness enabling a clearance to be formed between the layer and the high-temperature-side cylinder.

Gas lubrication structure for piston, and stirling engine

An exhaust pipe through which an exhaust port of an internal combustion engine and a catalyst for purifying an exhaust gas of the internal combustion engine are connected to each other includes a porous portion that is provided on at least a part of an inner peripheral face of the exhaust pipe. A thermal conductivity that the porous portion exhibits in a high temperature state where a temperature of the exhaust gas is as high as it is required to radiate a heat of the exhaust gas through the exhaust pipe is at least ten times higher than a thermal conductivity that the porous portion exhibits in a low temperature state where the temperature of the exhaust gas is as low as it is required to warm the catalyst up.

Exhaust pipe

A high expansion ratio internal combustion engine includes: a variable compression ratio mechanism that varies a mechanical compression ratio of the internal combustion engine; and a variable valve train in which some valve(s) of a plurality of intake valves is phase-variable and the remaining valve(s) is phase-fixed, the variable valve train being configured such that a working angle of the phase-variable intake valve is larger than a working angle of the phase-fixed intake valve, wherein a valve-open timing of the phase-variable intake valve is retarded after a valve-open timing of the phase-fixed intake valve when the internal combustion engine is under low-load operating state.

High expansion ratio internal combustion engine

The working gas circulation engine includes a circulation route capable of circulating gas containing the working gas from an exhaust side to an intake side of a combustion chamber and resupplying to the combustion chamber and provided with a removing device to remove a product generated with a reaction from the circulating gas, a supplying device capable of supplying plural kinds of reactant gas to the combustion chamber or the circulation route, a pressure detecting device capable of detecting pressure in the circulation route, and a control unit that controls supply amount of at least one kind of the reactant gas to be supplied from the supplying device based on the pressure in the circulation route detected by the pressure detecting device, and performs pressure control to adjust the pressure in the circulation route.

A silica structure includes mesoporous silica spheres; and connection portions each of which includes metal oxide, and each of which connects the mesoporous silica spheres to each other.

Silica structure and method of producing the same, and heat insulating material

A Stirling engine has a fluid passage that connects a low temperature-side actuating fluid space and a crankcase inner space, and a passage opening/closing valve that is provided in the fluid passage and that opens and closes the fluid passage. The passage opening/closing valve enables communication through the fluid passage upon startup of the Stirling engine, and shuts off communication through the fluid passage when the rotational speed of the crankshaft of the Stirling engine is equal to or greater than a pre-established start-enabling rotational speed.

Piston engine

A Stirling engine is provided with a fluid passage that connects a low temperature-side actuating fluid space and a crankcase inner space, and a passage opening/closing valve that is provided in the fluid passage and that opens and closes the fluid passage. Upon stopping of the Stirling engine, the passage opening/closing valve enables communication through the fluid passage, at a region at which the piston floats in the cylinder. This region is determined based on the pressure of an actuating fluid in the actuating fluid space and the rotational speed of a crankshaft of the Stirling engine.

A gas circulation engine includes a combustion chamber to which high-pressure fuel in a first high-pressure fuel supply passage, an oxidant and working gas are supplied; a circulation path that connects an intake-side portion and an exhaust-side portion of the combustion chamber to each other; a fuel bleed-off tank into which the high-pressure fuel in the first high-pressure fuel supply passage is bled off; a fuel bleed-off valve that permits or shuts off communication between the first high-pressure fuel supply passage and the fuel bleed-off tank; and a fuel bleed-off control unit that permits communication between the first high-pressure fuel supply passage and the fuel bleed-off tank by opening the fuel bleed-off valve when the engine is stopped, the communication between the first high-pressure fuel supply passage and the fuel bleed-off tank being shut off during operation of the engine.

Gas circulation engine

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Gotenba, Japan

Daisaku Sawada