Abstract: An injector includes a nozzle body, a main body including a supply port on the outer peripheral surface of the main body and a high pressure passage, and a fuel pressure sensor on an outer peripheral surface of the main body to detect fuel pressure. The high pressure passage has a first passage extending from the supply port in a radial direction of the main body, and a second passage extending from a fuel downstream end portion of the first passage toward an injection hole in an insertion direction of the nozzle body. The supply port and the sensor are diametrically opposed to each other. The main body includes a sensor passage, which branches from the high pressure passage to extend from the fuel downstream end portion of the first passage in an imaginary extension of the first passage so that fuel flows into the sensor through the sensor passage.

Abstract: An injector having an injector body, in which a housing opening and a communication hale are provided, includes a supporting member fixed to an actuator, which includes a lead-wire supporting portion that supports ends of lead wires and a plate portion formed integrally with the lead-wire supporting portion. A thickness of the plate portion is smaller than that of the lead-wire supporting portion, and multiple trench portions are provided on a surface of the plate portion so that the plate portion can be easily bent. While the supporting member passes through the housing opening, the lead wires straight move. After an end portion of the supporting member contacts the communication hole, external force is applied to the end portion to bend the plate portion, and thereby the lead wires are bent while moving in the communication hole.

Abstract: The injector body 4z which forms therein the high-pressure paths 6az, 6hz, and 6cz through which high-pressure fuel flows to a spray hole and has disposed therein the piezo-actuator 2z (drive means) to drive a needle (valve) to open or close the spray hole, the fuel pressure sensor 50z which is installed in the body 4z to measure the pressure of the high-pressure fuel, the sensor terminals 55z to output a measured pressure value from the fuel pressure sensor 50z externally, the drive terminals 56z to which the electric power for the piezo-actuator 2z is supplied, and the connector housing 70z retaining the sensor terminals 55z and the drive terminals 56z are provided. The sensor terminals 55z, the drive terminals 56z, and the connector housing 70z constitute a single connector.

Abstract: A fuel injection valve includes a body, a fuel pressure sensor, and a weld. The body has a passage to introduce high pressure fuel toward an injection hole. The fuel pressure sensor has a strain element and a sensor element so as to detect a pressure of the fuel. The strain element has an elastic deformation by receiving a pressure of the fuel. The sensor element converts an amount of the elastic deformation into a signal. The weld is defined by welding the body and the strain element. The fuel pressure sensor is mounted to the body through the weld.

Abstract: A fuel pressure sensor/sensor mount assembly for use in a fuel injection system equipped with fuel injectors which inject fuel, as supplied from an accumulator through fuel pipes, into a multi-cylinder internal combustion engine mounted in an engine compartment of a vehicle. The assembly includes a connector unit and fuel pressure sensors. The connector unit has formed therein a plurality of communication paths each of which is to establish a connection between one of the fuel injectors and the accumulator through one of the fuel pipes. The connector unit also has formed therein sensor mounts exposed to the communication paths. Each of the fuel pressure sensors is disposed in the sensor mount to measure the pressure of the fuel in the communication path. This structure permits steps of installing the fuel pressure sensors within the engine compartment to be decreased and ensures desired measurement accuracy of the fuel pressure sensors.

Abstract: In a double-headed piston type compressor provided with a rotary valve in a rotary shaft, the rotary valve has an introducing port for introducing refrigerant from a suction-pressure region through a supply passage and a respective suction port into a compression chamber. A shaft seal between a front housing and the rotary shaft for preventing leakage of refrigerant along a peripheral surface of the rotary shaft is accommodated in a shaft seal chamber formed in the front housing. A communication passage connects the shaft seal chamber to the cam chamber. A communication groove is formed in an outer peripheral surface of the rotary shaft that forms the rotary valve adjacent to the front housing for communication between the introducing port and the shaft seal chamber. The supply passage and the cam chamber are in communication through the communication groove, the shaft seal chamber and the communication passage.

Abstract: A stem is installed to an injector body and is resiliently deformable upon receiving a pressure of high pressure fuel conducted through a high pressure passage of the injector body. A strain gauge is installed to the stem to sense a strain generated in the stem. A molded IC device executes an amplifying operation, which amplifies a signal received from the strain gauge. A housing is installed to the stem and holds the molded IC device. The stem, the strain gauge the molded IC device and the housing are integrally assembled together to form a fuel pressure sensing unit, which is installed to the injector body by threadably fastening a threaded portion, which is formed at the housing, to the injector body.

Abstract: A stem is installed to an injector body and is resiliently deformable upon receiving a pressure of high pressure fuel conducted through a high pressure passage of the injector body. A strain gauge is installed to the stem to sense a strain generated in the stem. A molded IC device executes an amplifying operation, which amplifies a signal received from the strain gauge. A retainer is threadably fastened to the injector body and is configured to be rotatable relative to the stem. The stem, the strain gauge the molded IC device are integrally assembled together to form a fuel pressure sensing unit, which is installed to the injector body by threadably fastening a threaded portion of the retainer to the injector body.

Abstract: In a fuel injector, a body has formed therein a spray hole and a fuel supply passage. Fuel supplied to the fuel supply passage is delivered to the spray hole. A fuel pressure sensor produces a signal indicative of a pressure of the fuel. First terminals are attached to the fuel pressure sensor, and include a terminal for outputting the signal. The fuel pressure sensor is threadedly installed in the body while the plurality of first terminals are rotated about a preset axis. A connector includes a housing attached to the body, and second terminals supported by the housing for external electric connection of the fuel pressure sensor. Electrodes are each arranged to extend around the preset axis in a circular arc. Each of the electrodes electrically connects a corresponding one of the first terminals to a corresponding one of the second terminals.

Abstract: A stem is installed to an injector body and is resiliently deformable upon receiving a pressure of high pressure fuel conducted through a high pressure passage of the injector body. A strain gauge is installed to the stem to sense a strain generated in the stem. A molded IC device executes an amplifying operation, which amplifies a signal received from the strain gauge. The stem, the strain gauge and the molded IC device are integrally assembled together to form a fuel pressure sensing unit, which is installed to the injector body by threadably fastening a threaded portion, which is formed at the stem, to the injector body.

Abstract: An injector includes a nozzle hole, a metal body including a high pressure passage inside the body, and a fuel pressure sensor attached to the body to detect fuel pressure. The sensor includes a metal flexure element resiliently deformed upon application of fuel pressure to the flexure element, and a sensor element that converts flexure in the flexure element into an electrical signal and outputs the signal as a pressure detection value. The body includes a sensor high pressure passage communicating with the flexure element, and a body side sealing surface on which the flexure element is pressed and closely-attached so that a clearance between the body and the flexure element is metal-to-metal sealed on the sealing surface. Carburizing treatment is performed on at least a part of the body that defines the sensor high pressure passage. The carburizing treatment is not performed on the sealing surface.

Abstract: A fuel injection device includes a pressure control portion for controlling operation of a nozzle, and a body portion having therein a bent lead wire hole through which two lead wires of the pressure control portion are introduced to exterior. A first guide member having therein a pair of first guide grooves partitioned by a first partition member is inserted into the lead wire hole from one end side, a second guide member having therein a pair of second guide grooves partitioned by a second partition member is inserted into the lead wire hole from the other end side. The first partition member protrudes from one end portion of the first guide member to have a protrusion portion, which is fitted with a recess portion of the second partition portion at one end portion of the second guide member when the first and second guide members contact.

Abstract: A fuel injection apparatus that includes a body, a nozzle, a pressure control unit, and a physical quantity measurement unit. The body has a fuel inlet port and a high-pressure fuel passage that is communicated with the fuel inlet port. The pressure control unit controls opening and closing of the nozzle. The fuel inlet port projects in a radially outward direction of the body. The body includes a fuel outlet port located on a lateral side of a longitudinal axis of the body opposite from the fuel inlet port. The physical quantity measurement unit is provided between the fuel inlet port and the fuel outlet port, and the physical quantity measurement unit measures a physical quantity of high pressure fuel introduced from the fuel inlet port.

Abstract: A fuel injection apparatus includes a body, a nozzle, a pressure control unit, a physical quantity measurement unit, a first terminal, a second terminal, a positioning member, and a resin connector main body portion. The pressure control unit controls opening and closing of the nozzle The physical quantity measurement unit outputs an electric signal in accordance with a physical quantity of high pressure fuel. The first terminal is connected to the pressure control unit. The second terminal connected to the physical quantity measurement unit. The positioning member integrally holds the first terminal and the second terminal and locates the first terminal and the second terminal at predetermined positions. The connector main body portion receives therein the positioning member.

Abstract: In a fuel injector, a body has formed therein a spray hole and a fuel supply passage. Fuel supplied to the fuel supply passage is delivered to the spray hole. A fuel pressure sensor produces a signal indicative of a pressure of the fuel. First terminals are attached to the fuel pressure sensor and include a terminal for outputting the signal. The fuel pressure sensor is threadedly installed in the body while the first terminals are rotated. A connector includes a housing attached to the body, and second terminals supported by the housing for external electric connection of the fuel pressure sensor. Wires are operative to establish electrical connection between the first terminals and the second terminals. A wire holder is configured to hold each of the plurality of wires at least partly around the fuel pressure sensor.

Abstract: An injector has a body that defines a high-pressure passage for passing high-pressure fuel to an injection hole inside, a needle that is accommodated in the body and that opens and closes the injection hole, an electric actuator that causes the needle to perform the opening and closing action, a lead wire that is arranged in a lead wire insertion hole formed in the body and that supplies an electric power to the electric actuator, and a fuel pressure sensor that is fixed to the body and that senses pressure of the high-pressure fuel. An outlet hole, via which the lead wire extends from the lead wire insertion hole to an outside of the body, is located at a position closer to the injection hole than the fuel pressure sensor is.

Abstract: A connector includes a body portion having a cylindrical insertion hole for inserting therein a connection member, and a cylindrical connector cover. The body portion includes a claw portion elastically deformable to a radial outside. The connector cover includes a claw release portion through which a limitation of an elastic deformation of the claw portion is released, and a claw limiting portion configured to limit the elastic deformation of the claw portion toward the radial outside. When the connector cover is located at a release position, the claw release portion is opposite to the claw portion but the claw limiting portion is not opposite to the claw portion. In contrast, when the connector cover is moved to a lock position, the claw limiting portion is opposite to the claw portion, and the claw portion is engaged with an engagement portion provided on the connection member.

Abstract: A connector includes a body portion having a cylindrical insertion hole for inserting therein a connection member, and a cylindrical connector cover. The body portion includes a claw portion elastically deformable to a radial outside. A claw release portion and a claw covering portion are arranged in the connector cover in a rotation direction. When the connector cover is located at a release position where the body portion is detachable from the connection member, the claw release portion is opposite to the claw portion, and the claw covering portion is not opposite to the claw portion. Furthermore, when the connector cover is rotated from the release position to a lock position in a connection state between the body portion and the connection member, the claw covering portion is opposite to the claw portion, and the claw portion is engaged with an engagement portion of the connection member.

Abstract: A connector includes a body portion having an inner peripheral surface defining a cylindrical insertion hole for inserting therein a connection member and an O-ring. A recess portion is provided in the inner peripheral surface of the body portion, and is opened in the body portion in a radial direction of the body portion, at a position on an inlet side of the insertion hole than the arrangement position of the O-ring. Furthermore, the recess portion extends in an axial direction of the body portion and has an end portion on a side of an arrangement position of the O-ring, and the end portion of the recess portion becomes in an acute angle shape which is acute toward the arrangement position of the O-ring. Alternatively, an angle reducing portion may be provided in the recess portion on a side of the arrangement position of the O-ring.

Abstract: A connector is manufactured by integrally molding with a resin, by using a first molding die having a molding portion for molding outer shapes of first and second connection portions of the connector, and a cylindrical second molding die inserted into the molding portion to mold an insertion hole in which a connection member is inserted. In the molding, a circular core portion is inserted into the molding portion in a state where the second molding die is inserted into the core portion. Then, the molded first and second connection portions are removed together with the core portion, from the first and second molding dies. Thereafter, the core portion in the first connection portion is dissolved by using a solvent, so that a circular recess portion for arranging an O-ring is formed to be recessed from a peripheral surface of the insertion hole to a radial outside.