Abstract: During a pressurization stroke of a high-pressure pump, a cylinder inner wall and a plunger receive a fuel pressure from the pressurization chamber. Meanwhile, an upper housing does not receive the fuel pressure from the pressurization chamber, so that its thickness can be made thin. A cylinder is comprised of a bottom portion, a cylindrical portion and a large-diameter cylindrical portion. When inserting the large-diameter cylindrical portion into a large engaging hole, the bottom portion and the cylindrical portion are not brought into contact with a lower housing. A high liquid-tightness between the bottom portion, the cylindrical portion and a small engaging hole can be ensured.

Abstract: 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.

Abstract: A high pressure pump includes a pump body, a pressurizing chamber, a fuel passage, a union, a seat member, a relief valve seat, a relief valve, a discharge valve seat, a discharge valve, a spring and a spring holder. The union has an inner threaded portion and a step portion formed on an inner wall of the union. The seat member includes a relief passage that extends through the seat member in an axial direction of the seat member and a discharge path that is not in fluid communication with the relief passage. The one opening of the relief passage is closer to the pressurizing chamber than an other opening of the relief passage is to the pressurizing chamber. The one opening of the discharge path is further from the pressurizing chamber than an other opening of the discharge path is from the pressurizing chamber. The seat member is pressed toward the step portion when the spring holder is fastened to the union by engaging the inner threaded portion with the outer threaded portion.

Abstract: A common seat portion includes discharge passages that communicate between a first valve chamber and a second valve chamber when a discharge valve member is lifted away from the common seat portion. The common seat portion also includes a relief passage that extends substantially parallel to the discharge passages and communicates between the first valve chamber and the second valve chamber when a relief valve member is lifted away from the common seat portion.

Abstract: The temperature sensor 1 is equipped with a temperature sensitive device 2 to be disposed inside an exhaust pipe of an internal combustion engine, signal lines 31 connected at a top end side to the temperature sensitive device 2 and at a rear end side to leads for connection with an external circuit, an inner member 18 having a sheath pin 3 in which the signal lines 31 are disposed, and an outer member 13 disposed to cover at least a portion of an outer periphery of the inner member 18. The outer member 13 includes a fixed portion (rib 6) to be fixed to an upper wall of the exhaust pipe, a retainer portion 132 retaining the inner member 18, and an extending portion 131 formed closer to a top end side than the retainer portion 132.

Abstract: A temperature sensor including a temperature sensitive device which is disposed in a flow path through which fluid flows and whose electric characteristic changes as a function of temperature of the fluid in the flow path, signal lines connected at top end sides thereof to said temperature sensitive device through electrode wires and at base end sides thereof to lead wires for connection with an external circuit, a sheath member retaining the signal lines therein, and a holding member which holds an outer circumferential surface of said sheath member directly or indirectly through another member. The resonance (primary) frequency at a top end of the temperature sensor against acceleration in a radius direction of the temperature sensor is 480 Hz or less, thereby reducing the transmission of vibration to the top end of the temperature sensor to avoid the breakage of the temperature sensitive device and the disconnection of the electrode wires 502102 even when the temperature sensor resonates.

Abstract: A valve seat has an inner passage and outer passages. A suction valve member has first passages and a first projection portion that guides, to the first passages, the fuel that flows from a pressure chamber at the time of valve opening. Therefore, an action force by the dynamic pressure applied to the suction valve member in the valve closing direction is reduced. An action force by the pressure of fuel that flows into pressure equalization grooves counterbalances the action force by the dynamic pressure of the suction valve member. Therefore, self-closing by the dynamic pressure can be inhibited, and the maximum output of an electromagnetic driving unit can be reduced. Fuel flows through a passage radially outside the suction valve member and the first passages. A fluid passage area is securable even when a lift amount of the suction valve member is small.

Abstract: A valve body is provided with a discharge relief portion. A relief valve outlet is formed in an end face thereof on a central axis of the valve body. Discharge valve inlets are point-symmetrically formed with respect to the central axis. A discharge valve outlet is formed in another end face thereof and relief valve inlets are point-symmetrically formed with respect to the central axis. A discharge valve outlet and the discharge valve inlets communicate with each other. A flow of fuel from a pressurization chamber to a fuel discharge port is restricted by a discharge valve member capable of closing the discharge valve outlet. The relief valve outlet and the relief valve inlets communicate with each other. A flow of fuel from the fuel discharge port to the pressurization chamber is restricted by a relief valve member capable of closing the relief valve outlet.

Abstract: A high-pressure pump is comprised of a lower housing, an upper housing and a cover, which are formed independently from each other. Thereby, shapes of the above can be simplified. Although the cylinder and the plunger receive a fuel pressure during a pressurization stroke, the upper housing and the cover do not receive fuel pressure directly from a pressurization chamber. Therefore, the upper housing and the cover can be made thin and light as much as possible.

Abstract: During a pressurization stroke of a high-pressure pump, a cylinder inner wall and a plunger receive a fuel pressure from the pressurization chamber. Meanwhile, an upper housing does not receive the fuel pressure from the pressurization chamber, so that its thickness can be made thin. A cylinder is comprised of a bottom portion, a cylindrical portion and a large-diameter cylindrical portion. When inserting the large-diameter cylindrical portion into a large engaging hole, the bottom portion and the cylindrical portion are not brought into contact with a lower housing. A high liquid-tightness between the bottom portion, the cylindrical portion and a small engaging hole can be ensured.

Abstract: 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.

Abstract: A reducing gas generator generates reducing gas including ammonia. The generator includes a solid reductant and a heat-generating portion. The solid reductant is formed in a columnar shape. A cross-sectional surface of the solid reductant has a constant shape and is perpendicular to a central axis of the solid reductant. The heat-generating portion includes a heat-generating surface opposed to a lower surface of the solid reductant in a vertical direction thereof and in contact with an entire region of the lower surface, and a heating element that heats the heat-generating surface when energized, so that the solid reductant is heated and decomposed to generate the reducing gas.

Abstract: A water separation unit includes a water separation portion. The water separation portion includes a component separation wall, a liquid chamber, and a gas chamber. The separation wall divides the water separation portion between the liquid chamber and the gas chamber. Liquid fuel is led to the liquid chamber. The separation wall includes a separation membrane, which water selectively permeates to be separated from liquid fuel in the liquid chamber. Water passing through the separation wall is temporarily stored in the gas chamber. A fuel supply apparatus supplies liquid fuel in a fuel tank to an internal-combustion engine. The apparatus includes the water separation unit. The water separation portion is disposed integrally in one of the fuel tank and a passage leading from a filler opening into the fuel tank, such that the liquid chamber is located above the gas chamber in a vertical direction of the water separation portion.

Abstract: A pressurizing piston has a head section, which contacts an axial end face of a piezoelectric actuator to receive displacement of the actuator, and a piston wall section, which is formed in a cylindrical shape and can move in an axial direction in response to the movement of the head section. The head section and the piston wall section are combined such that relative displacement therebetween is possible in a radial direction. An outer sleeve slidably holding an outer periphery of the piston wall section restricts radial movement of the head section. When an expansion-contraction direction of the actuator inclines with respect to the axial direction, inclination of the piston wall section is inhibited by a radial deviation caused between the head section and the piston wall section. Thus, pinching of the piston wall section to the outer sleeve is inhibited.

Abstract: A DPF and a SCR catalyst are provided in an exhaust pipe, and a urea solution addition valve is provided between the DPF and the SCR catalyst for performing addition supply of urea solution into the exhaust pipe. In a urea solution supply system, the urea solution of prescribed concentration is stored in a urea solution tank, and a urea solution pump is provided in the tank. A urea solution supply pipe is connected to the urea solution pump. A part of the urea solution supply pipe is structured as a compound pipe structure defining two passages. One of the two passages serves as a urea solution passage, and the other one serves as an engine coolant passage.

Abstract: A fuel injector injects high-pressure gaseous fuel directly into a cylinder of an engine. A small amount of liquid fuel is used in the injector to lubricate sliding portions of the fuel injector in addition to utilizing it as a medium for transmitting driving force. The fuel injector includes a nozzle member having injection holes at its elongated end and a needle slidably disposed in an elongated center hole of the nozzle member. The needle is driven by pressure of the liquid fuel introduced into a control chamber to open or close the injection holes. The pressure in the control chamber is controlled by a switching valve which is in turn driven by an actuator such as an electromagnetic or piezoelectric actuator. The liquid fuel is injected together with the high-pressure gaseous fuel after lubricating the sliding portions between the nozzle member and the needle.

Abstract: An inflection point sensing arrangement of an electronic drive unit, which drives a fuel injection valve, senses an inflection point in a pressure-changing process of the pressure in the control chamber. A charging and discharging condition changing arrangement of the electronic drive unit changes a charging condition for charging of the electric current to a piezoelectric actuator of the fuel injection valve or a discharging condition for discharging of the electric current from the piezoelectric actuator upon sensing of the inflection point, which is sensed with the inflection point sensing arrangement.

Abstract: A temperature sensor including a temperature sensitive device which is disposed in a flow path through which fluid flows and whose electric characteristic changes as a function of temperature of the fluid in the flow path, signal lines connected at top end sides thereof to said temperature sensitive device through electrode wires and at base end sides thereof to lead wires for connection with an external circuit, a sheath member retaining the signal lines therein, and a holding member which holds an outer circumferential surface of said sheath member directly or indirectly through another member. The resonance (primary) frequency at a top end of the temperature sensor against acceleration in a radius direction of the temperature sensor is 480 Hz or less, thereby reducing the transmission of vibration to the top end of the temperature sensor to avoid the breakage of the temperature sensitive device and the disconnection of the electrode wires 502102 even when the temperature sensor resonates.

Abstract: An injector has a lift limiting member provided by a single plate member. The plate member has a stopper face, multiple hole sections, a flow passage hole, and a spring seat face. An axial end face of a needle head section of a needle contacts the stopper face when the needle lifts by a predetermined amount. Transmitting sections of a pressurizing piston are loosely inserted in the hole sections. High pressure fuel can pass through the flow passage hole. The spring seat face receives an end portion of a spring that biases the needle in a valve closing direction. The lift limiting member limits a valve opening lift position of the needle, so a stable injection quantity is obtained. Thus, a surface area of the single plate member can be used in multiple functions.

Abstract: The temperature sensor 1 is equipped with a temperature sensitive device 2 to be disposed inside an exhaust pipe of an internal combustion engine, signal lines 31 connected at a top end side to the temperature sensitive device 2 and at a rear end side to leads for connection with an external circuit, an inner member 18 having a sheath pin 3 in which the signal lines 31 are disposed, and an outer member 13 disposed to cover at least a portion of an outer periphery of the inner member 18. The outer member 13 includes a fixed portion (rib 6) to be fixed to an upper wall of the exhaust pipe, a retainer portion 132 retaining the inner member 18, and an extending portion 131 formed closer to a top end side than the retainer portion 132.