Denso Corporation

Nippon Soken, Inc.

Nippondenso Co., Ltd.

Toyota Jidosha Kabushiki Kaisha

Fujikoki Corporation

Eagle Industry Co., Ltd.

Nippondenso Kabushiki Kaisha

Osamu Hishinuma

Teppei Matsumoto

Hiroatsu Yamada

Masatoshi Kuroyanagi

Shinichiro Koshimoto

Takehiko Kato

Yutaka Miyamoto

Makoto Sudo

Shin Yoshida

Yukinori Miyata

Yoshihiro Ogawa

Yusuke Sato

Takao Okada

Toshiaki Iwa

Eiji Takemoto

Masahiko Miyaki

Akira Masuda

Kunio Nanba

Kazuto Maeda

Koji Hashimoto

Masatoshi Ikeda

Akira Shibata

Michio Kawagoe

Tatsuro Koga

Takeyuki Yabuuchi

Toshihiko Ohmori

Akinori Nanbu

Yasuhiro Furuhashi

Yutaka Inoue

Shinichi Sugimoto

Yuichi Irino

Masahiro Tomitsuka

Fumiaki Tanaka

Nobuo Kato

A damper device is provided in a flow passage of a fluid. The damper device includes a plurality of diaphragm dampers that are stacked together. Each of the plurality of diaphragm dampers includes a first flexible portion, a second flexible portion, and a rim including a welded portion. A peripheral edge of the first flexible portion and a peripheral edge of the second flexible portion are welded together in the welded portion. Each of the plurality of diaphragm dampers is configured to seal a gas in an inner region between the first flexible portion and the second flexible portion. A coupler that couples the plurality of diaphragm dampers together includes holders that hold the rims of the plurality of diaphragm dampers. A gap is provided between the holder of the coupler and the welded portion of each of the plurality of diaphragm dampers.

Damper device with a plurality of stacked diaphragms coupled together by a coupler having holders forming a space provided between a peripheral weld of the diaphragms and the coupler

A diaphragm includes a flange and a protrusion provided to protrude to one side of the flange, wherein the protrusion has at least two annular curved portions provided annularly on a ceiling portion having a flat surface-like shape and an outer side in a radial direction of the ceiling portion, in a state where pressure on an outer wall side of the protrusion and pressure on an inner wall side of the protrusion are the same, the at least two annular curved portions are each formed to be curved in a cross-section of the diaphragm obtained by cutting the diaphragm by a virtual plane including a center line of the diaphragm, the centers of curvature of the curved portions being arranged at different positions on a side opposite to a protruding direction of the protrusion, and the diaphragm is formed of a sheet metal.

Diaphragm and pulsation damper using same

A pulsation damper includes an upper diaphragm, a lower diaphragm configured to form a sealed space having a predetermined pressure with the upper diaphragm, in which an inert gas is filled; and a deformation suppressing member formed of an elastic material, and comprising an inner cylindrical portion, and an extension portion extending from a center portion on an outer peripheral surface of the inner cylindrical portion such that the extension portion extends outward from a center axis of the inner cylindrical portion, wherein the deformation suppressing member is arranged inside the sealed space such that an outer periphery of the extension portion abuts against inner walls of the upper diaphragm and the lower diaphragm.

Pulsation damper

A cylinder is configured into a bottomed tubular form and includes an inner peripheral wall, an inner bottom wall, an outer peripheral wall and an intake hole and a discharge hole. The inner peripheral wall slidably guides the plunger. The intake hole and the discharge hole communicate between the inner peripheral wall and the outer peripheral wall. A pump housing includes a cylinder receiving hole that includes an inner peripheral wall, into which the cylinder is inserted. A pressurizing chamber is formed by the inner peripheral wall and the inner bottom wall of the cylinder and a distal end outer wall of the plunger.

High pressure pump with pressurizing chamber

A valve seat member, which partitions between a supply passage and a pressurizing chamber, includes an inner flow path, which communicates between the supply passage and the pressurizing chamber, and an outer flow path, which is placed on a radially outer side of the inner flow path. An inner valve is seatable against an inner valve seat formed in an opening of the inner flow path. An outer valve is contactable with an end surface of the inner valve, which is opposite from the inner valve seat. The outer valve is seatable against an outer valve seat, which is formed in an opening of the outer flow path.

High pressure pump

A valve seat member which partitions between a supply passage and a pressurizing chamber, includes an inner flow path, which communicates between the supply passage and the pressurizing chamber, and an outer flow path, which is placed on a radially outer side of the inner flow path. An inner valve is seatable against inner valve seat formed in an opening of the inner flow path. An outer valve is contactable with an end surface of the inner valve, which is opposite from the inner valve seat. The outer valve is seatable against an outer valve seat, which is formed in an opening of the outer flow path.

A plunger stopper is installed to a cylinder hole forming portion of a cylinder forming member. The plunger stopper cooperates with a step portion of a plunger to limit movement of the plunger in a state where a slide surface of the plunger contacts an inner peripheral wall surface of the cylinder hole.

High pressure pump with pressurizing chamber enclosed within cylinder inserted into housing

At least one choked flow passage communicates between one side of the movable member and the other side of the movable member and limits an amount of fuel, which passes from the one side of the movable member to the other side of the movable member, when the movable member is moved by an urging force of a relief spring toward a valve element. A larger amount of fuel, which is larger than the amount of fuel that is passable through the at least one choked flow passage, flows from a first return flow passage to a second return flow passage, when the movable member is moved toward the other side, which is opposite from the valve element, against the urging force of the relief spring.

An inner-cam type distribution fuel injection pump has a lubricating system for lubricating the interior of a cam chamber defined by an inner cam and a rotor with a lubricating oil having a viscosity higher than the viscosity of fuel oil. The pump is structured to prevent the fuel oil from leaking into the lubricating oil.

Inner-cam type distribution fuel injection pump

A fuel injection pump for an internal combustion engine has a shaft rotatable by the engine. The shaft is formed therein with a radial bore and an axial bore communicated therewith. Pumping plungers are slidably disposed in the radial bore to cooperate therewith to define a compression chamber and cyclically reciprocated to vary the volume of the compression chamber. An injection plunger is slidably disposed in the axial bore to divide the interior thereof into a first pressure chamber always communicated with the compression chamber and a second pressure chamber adapted to be communicated with a delivery port in a discharge stroke of the pump. The first and second pressure chambers are supplied with fuel in a suction stroke of the pump. The fuel in the second pressure chamber is discharged therefrom in the discharge stroke. A single solenoid valve is provided to control the fuel discharge timing and the quantity of fuel to be discharged from the pump.

Fuel injection pump

An exhaust gas recirculation system for a diesel engine and which includes an exhaust gas recirculation passage connecting between the exhaust system and the air intake system of the engine, an exhaust gas recirculation control valve which regulates the flow resistance of the exhaust gas recirculation passage according to the amount by which the pressure in its pressure chamber is lower than atmospheric, a mechanism for providing a supply of low pressure, an absolute pressure control valve which receives a supply of low pressure from such mechanism at its input port and provides a supply of a pressure at its output port the absolute pressure value of which is substantially fixed, and a vacuum control valve which has a pressure regulating chamber which receives supply of pressure from the output port of the absolute pressure control valve and also has an output port opening from the pressure regulating chamber. The vacuum control valve is controlled according to engine load, and bleeds the pressure regulating chamber to the atmosphere when the pressure therein is at or below a certain pressure value, this certain pressure value increasing in accordance with increasing engine load. The output port of the vacuum control valve is communicated to the pressure chamber of the exhaust gas recirculation control valve.

Diesel engine exhaust gas recirculation system with greater atmospheric

A distributor type fuel injection pump has an accumulator. When an internal combustion engine is in low-speed rotation or in low-load operation, the accumulator accumulates part of the fuel pressurized within a fuel compression chamber, thereby lowering the fuel injection rate. Also, the fuel injection pump is provided with compensator which operates simultaneously with the accumulator. While the injection rate is lowered by operation of the accumulator, the compensator extends the injection period to compensate for the reduction of injection quantity attributed to reduction of the injection rate.

Distributor type fuel injection pump

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Toyota, Japan

Osamu Hishinuma