Denso Corporation

Brother Kogyo Kabushiki-kaisha

Toyota Jidosha Kabushiki Kaisha

Nippondenso Co., Ltd.

Aisin Aw Co., Ltd.

Nippon Soken, Inc.

Neomax Materials Co., Ltd.

Sankyo Radiator Co., Ltd.

Takayuki Hayashi

Akihiro Maeda

Takeshi Iguchi

Yasutoshi Yamanaka

Isao Kuroyanagi

Kazuaki Kafuku

Hiroo Yamaguchi

Takaki Okochi

Hideo Yoshihara

Ryoichi Sanada

Takao Ikeda

Kenji Yamada

Toshihiko Igashira

Tokio Kohama

Koichi Ito

Hikaru Sugi

Atsushi Honda

Kenji Sakakibara

Shigeyuki Hayashi

Kazuhisa Ozaki

Kazutoshi Nozaki

Masaaki Ishio

Michitoshi Akao

Kazuyuki Noda

Takashi Nakata

Minoru Todo

Yoshitsugu Sakamoto

Tatsuo Sugimoto

Tetsuya Yamaguchi

Takashi Tomita

Hiroaki Kimura

Tsuyoshi Hasegawa

Nobuyuki Matsuoka

Hiroyuki Fukunaga

Kazuhiro Shibagaki

Toru Ikeda

Kazuichi Sakaida

Youji Yamashita

Ryuichi Matsushiro, Deceased

Yoshimitsu Inque

Yuu Ohfune

Takai Okochi

Toshinari Sasaki

Yuuhei Kunikata

Shunji Kajikawa

Naoki Hirayama

An EGR cooler includes a heat exchanging core which has a plurality of tubes, an upstream-side gas tank portion upstream of the tubes and a downstream-side gas tank portion downstream of the tubes. A water tank portion forms a first water passage around the tubes and forms a second water passage around the upstream-side gas tank portion. A double pipe portion forms a gas passage which communicates with the upstream-side gas tank portion and forms an annular water passage which communicates with the second water passage. A water inflow pipe is connected to the double pipe portion such that the cooling water flows into the annular water passage, and a water outflow pipe that is connected to the water tank portion such that the cooling water flows out from the first water passage.

Exhaust gas heat exchanging device

An exhaust gas cooling device, which cools exhaust gas from an internal combustion engine mounted on a vehicle through heat exchange between the exhaust gas and a coolant, includes: a plurality of tubes through which the exhaust gas flows; a tubular shell which houses the plurality of tubes and is configured to allow the coolant to flow therethrough; and a header plate disposed at an end portion in the shell to prevent the coolant from flowing out of the shell. The header plate includes support holes in which end portions of the plurality of the tubes are fitted and supported, and each of axial end faces of the plurality of tubes is located in the corresponding support hole at a position between both ends of the header plate in a thickness direction of the header plate.

Exhaust gas cooling device

An exhaust heat exchanger includes a water tank accommodating tubes and having an outside space defined outside of the tubes, a gas tank having an exhaust passage and an outside space defined outside of the exhaust passage, a dividing portion to separate the outside space of the water tank from the exhaust passage of the gas tank, and a communication portion. The outside space of the gas tank and the outside space of the water tank communicate with each other through the communication portion.

Exhaust heat exchanger

A brazing method includes assembling a first member and a second member, the first member including a base plate made of a ferrous material and a diffusion suppressing layer laminated on the base plate and made of a Ni&#x2014;Cr alloy including more than about 15% and less than about 40% of Cr, the second member being disposed on the first member with a brazing material of a Cu&#x2014;Ni alloy including more than about 10% and less than about 20% of Ni therebetween, and maintaining the temporary assembly at a temperature of more than about 1,200&#xb0; C. to fuse the brazing material and diffuse Ni atoms and Cr atoms into the fused brazing material to form the braze joint, causing the resulting brazing material to have an increased melting point due to the Ni and Cr contents of the braze joint to self-solidify the braze joint, and then cooling the resulting assembly.

Brazing method and brazed structure

A heat exchanger includes first tubes and a second tube in a casing. The first tubes and the second tube are arranged in layers such that first spaces are provided between the adjacent first tubes and a second space is defined on a periphery of the second tube. Ends of the first tubes and the second tube are connected to a core plate such that first fluid passages defined inside of the first tubes and the second tube are in communication with a connection flange and the first and second spaces are separated from the connection flange. The casing includes an expansion that is in communication with the first spaces, and a side wall that is in contact with a side wall of an end first tube that is located adjacent to the second tube such that the second space is separated from the first spaces and the communication chamber.

Heat exchanger

A hydraulic control apparatus for a multi-stage automatic transmission includes solenoid valves such as the linear solenoid valves that are formed as normally closed valves. A first clutch apply relay valves that outputs a forward range pressure as a reverse input pressure during an all-solenoid-off mode, and a second clutch apply relay valve that switches between a left half position that inputs a reverse input pressure to a discharge port and a right half position that inputs the reverse pressure to the discharge port are provided. The second clutch apply relay valve is set to the right half position during normal engine startup and locked based on the lock pressure by feeding the line pressure as a lock pressure and is set at the left half position that interrupts the lock pressure after the engine is restarted during all-solenoids-off.

Hydraulic control apparatus for a multi-stage automatic transmission

An exhaust gas heat exchanger has a tank, laminated exhaust gas tubes where the exhaust gas flows, a cooling water inlet pipe and a cooling water outlet pipe. The cooling water flows into the tank and flows through water passages between adjacent exhaust gas tubes and between an inner wall of the tank and an outermost exhaust gas tube. Ribs are formed on the exhaust gas tubes so as to lead the cooling water after colliding with an inner wall toward an upstream side of the exhaust gas tubes to prevent the cooling water from being stuck. Otherwise, spaces between an inner wall of a casing and the exhaust gas tubes are regulated to keep the flow rate of the cooling water in the casing so that the cooling water is prevented from being boiled locally by slow flow rate of the cooling water.

Exhaust gas heat exchanger

A profile of the casingis formed into a circular pipe shape, and the two gas coolersare integrated into one body so that the longitudinal directions of the respective gas coolers can be substantially parallel with each other. Due to the above structure, it is possible to make the coolant flow smoothly in the casingand stagnation of the coolant seldom occurs. Accordingly, as boiling of the coolant can be suppressed, it is possible to prevent the heat transfer coefficient from being remarkably deteriorated. Further, it is possible to suppress the generation of cracks, in the tubes, which are caused by heat stress.

A heat exchanger includes fins ( ) having a plurality of sets of two louvres ( ) substantially triangular in shape which are formed in such a manner that the distance from a flat plate portion ( ) increases progressively downstream in the gas flow direction. The two louvres ( ) of each set are arranged inwardly slanted along the gas flow direction, so that a vertical swirl is generated to draw the gas flow between the louvres ( ). The gas flowing in the vicinity of the flat plate portion ( ) and the gas flowing in the vicinity of a vertical plate portion ( ) are thus accelerated. As a result, the heat conductivity of the gas and the fins ( ) is improved and the particulate matter attached on the surface of the fins ( ) can be blown off, thereby preventing the clogging of the fins ( ).

An exhaust gas heat exchanger has a tank, laminated plural exhaust gas tubes disposed in the tank, a cooling water inlet pipe and a cooling water outlet pipe. The exhaust gas from a combustion engine flows into the exhaust gas tubes to exchange heat with the cooling water flowing in the tank. The core plates, which seal the tank at its both ends, are folded toward bonnets that are disposed at the both sides of the tank. The inlet pipe or the outlet pipe is disposed on the tank close to the core plate so that the cooling water can flow near the core plate in the tank so as to be prevented from being stuck near the core plate.

A cooling device has a radiator plate and a corrugated fin for cooling an electrical component. In a manufacturing process of the cooling device, a symmetrically constructed tool section presses the radiator plate and the fin against an anvil. The radiator plate has an attaching portion where an electrical component is attached. Knurled surface for preventing a slide is formed on the tool section only at a surrounding area to prevent a deformation of the attaching portion. The tool section and the radiator plate vibrate ultrasonically in a longitudinal direction of corrugations of the fin to prevent a crack on the fin.

Ultrasonically joining apparatus and ultrasonically joining method

A blower for flowing cooling air toward a corrugated fin is disposed to face the corrugated fin. The blower is covered with a blower case. Leg portions are integrally formed with and protrude from the blower case to face the corrugated fin at both sides in a corrugated direction of the corrugated fin. The blower case is fixed to a radiation plate by elastic deformation of the leg portions. The leg portions cover the both sides in the corrugated direction of the corrugated fin, so that the corrugated fin is protected from external force.

Cooling device with support members facing fin

A square substrate is divided into four substrate areas with reference lines respectively passing through a central point of the substrate in parallel with one of diagonals of the substrate. A fin disposed between the substrate and an axial fan has plural louvers each facing one of the substrate areas and extending in a direction parallel to a corresponding reference line of the one of the substrate areas. Accordingly, when air is blown out from the axial fan toward the substrate, an air flow direction can be changed by the louvers so that the air radially flows out from the central point of the substrate. As a result, a heat spot is not produced on the substrate.

Heat generating element cooling unit with louvers

By using a small heat accumulator installed in a cooling water system, malfunction of exhaust emission during warming up is prevented. Such a cooling system includes a cooling water passage for returning cooling water flowing from a cooling water outlet of an automotive engine to a cooling water inlet through a radiator, a first bypass passage for returning the cooling water just after flowing from the cooling water outlet to the cooling water inlet through the radiator, a second bypass passage for returning the cooling water just after flowing out from the cooling water outlet of the engine to the cooling water inlet through the radiator by supplying the cooling water near a heat-sensing portion of a thermostat, a flowing amount adjusting valve for enlarging a cooling water flowing ratio to the first bypass passage with respect to the second bypass passage corresponding to a reduction of a load of the engine and the heat accumulator installed through the first bypass passage.

Cooling system for an internal combustion engine

Growing community of inventors

Nagoya, Japan

Takayuki Hayashi