Abstract: Provided is a small and low-cost resin-sealed electronic control device including a first electronic board and a second electronic board respectively bonded onto an upper surface and a lower surface of a support plate, each of the first electronic board and the second electronic board having an increased mounting area on which circuit components are mounted. A first electronic board (30A) and a second electronic board (40A) respectively bonded onto an upper surface and a lower surface of a support plate (20A) include outer circuit components (31, 41) and inner circuit components (33, 43) respectively mounted on outer surfaces and inner surfaces thereof. The inner circuit components (33, 43) are fitted into a window hole portion (21) of the support plate (20A) and are sealed with a filler (25).

Abstract: Provided is a resin-sealed electronic control device reduced in size, which includes a double-sided mounting board as at least one of a plurality of electronic boards obtained by division so that a large mounting surface with a small plane area is ensured. Each of a first electronic board (30A) and a second electronic board (40A) bonded onto an upper surface and a lower surface of each of a pair of separate beam members (20A) includes two surfaces on which outer circuit components (31, 32, 41, 42) and an inner circuit component (33, 43) are respectively mounted. A height of each of the inner circuit components is equal to or less than a thickness of each of the separate beam members (20A). Heat-generating components (32, 42) in the outer circuit components are provided to be adjacent to and opposed to the separate beam members (20A).

Abstract: Any specific member for fixation is omitted from a fuel injection device so that number of parts is reduced and the fuel injection device is constructed at a reasonable cost. The fuel injection device for use in an internal combustion engine is provided with a fuel distribution pipe 1, plural connecting pipe members 4, and plural fuel injection valves 2, and each of the fuel injection valves 2 is inserted into a connecting pipe member 4. A band-shaped protrusion 7 extends in the radial direction from a flange portion of the connecting pipe member 4 and further extends in parallel to the axis of the fuel injection valve 2. The band-shaped protrusion 7 is provided with a fitting hole 8, and each fuel injection valve 2 is provided with a protrusion 9 fitted into the fitting hole 8.

Abstract: A communicating pipe is disposed on an outer periphery of an air intake pipe, and a conduit is formed so as to be parallel to an air intake passage. A plurality of first communicating apertures are disposed through the air intake pipe so as to be arranged in a single row in a conduit direction and communicate between the conduit and the air intake passage. A resonance chamber is mounted to the communicating pipe so as to communicate with a first end of the conduit. A movable member is disposed so as to be movable in the conduit direction by sliding in contact with the inner wall surface of the communicating pipe. A second communicating aperture is disposed through the movable member so as to be placed above the first communicating apertures. A communicating channel length between the air intake passage and the resonance chamber is adjusted by changing a position of overlap of the second communicating aperture relative to the first communicating apertures by moving the movable member in the conduit direction.

Abstract: An air cleaner chamber is configured such that a filtering member is held between an air cleaner cover and an air cleaner case. A low-speed operation air intake passage and a high-speed operation air intake passage share an outlet passage portion near a dusty space, and are molded integrally on the air cleaner case using a synthetic resin. A passage switching valve is disposed so as to switch an aperture area of the high-speed operation air intake passage. In addition, a valve actuator for driving the passage switching valve is mounted to the air cleaner case.

Abstract: An air intake control system includes valve elements disposed in intake passages for varying the cross-sectional area of each intake passage, a valve shaft for transmitting a driving force to the valve element, an actuator including a motor for producing the driving force for turning valve shaft, a worm gear mounted on a rotary shaft of the motor, and a housing accommodating the motor and the worm gear, and a driving gear which meshes with the worm gear to transmit the driving force supplied from the actuator to the valve shaft. The driving gear includes a boss portion, a tooth portion which meshes with the worm gear, and an elastic member which is sandwiched between and bonded to the boss portion and the tooth portion. The boss portion rotates together with the valve shaft, whereas the tooth portion and the elastic member can rotate relative to the valve shaft.

Abstract: Provide is an engine intake control device in which components such as attachment brackets, attachment screws for attaching respective solenoid valves around an engine are not required, and the number of attachment operations is reduced. The engine intake control device includes: a throttle chamber (1); a throttle valve (5) rotatably provided in the throttle chamber (1) using a valve shaft (2); an electric motor (6) provided outside an air passage (50); a coupling mechanism (51) for transmitting a driving force of the electric motor (6) to the valve shaft (2); a cover (7) provided on one side of the throttle chamber (1) to cover the coupling mechanism (51); and a solenoid valve (10) attached to the throttle chamber (1) for applying a negative pressure in a surge tank to an external negative pressure actuator and interrupting application of the negative pressure to the external negative pressure actuator. The solenoid valve (10) is provided integrally with the cover (7).

Abstract: A communicating pipe is disposed on an outer periphery of an air intake pipe, and a conduit is formed so as to be parallel to an air intake passage. A plurality of first communicating apertures are disposed through the air intake pipe so as to be arranged in a single row in a conduit direction and communicate between the conduit and the air intake passage. A resonance chamber is mounted to the communicating pipe so as to communicate with a first end of the conduit. A movable member is disposed so as to be movable in the conduit direction by sliding in contact with the inner wall surface of the communicating pipe. A second communicating aperture is disposed through the movable member so as to be placed above the first communicating apertures. A communicating channel length between the air intake passage and the resonance chamber is adjusted by changing a position of overlap of the second communicating aperture relative to the first communicating apertures by moving the movable member in the conduit direction.

Abstract: An air cleaner chamber is configured such that a filtering member is held between an air cleaner cover and an air cleaner case. A low-speed operation air intake passage and a high-speed operation air intake passage share an outlet passage portion near a dusty space, and are molded integrally on the air cleaner case using a synthetic resin. A passage switching valve is disposed so as to switch an aperture area of the high-speed operation air intake passage. In addition, a valve actuator for driving the passage switching valve is mounted to the air cleaner case.

Abstract: An air intake control system includes valve elements disposed in intake passages for varying the cross-sectional area of each intake passage, a valve shaft for transmitting a driving force to the valve element, an actuator including a motor for producing the driving force for turning valve shaft, a worm gear mounted on a rotary shaft of the motor, and a housing accommodating the motor and the worm gear, and a driving gear which meshes with the worm gear to transmit the driving force supplied from the actuator to the valve shaft. The driving gear includes a boss portion, a tooth portion which meshes with the worm gear, and an elastic member which is sandwiched between and bonded to the boss portion and the tooth portion. The boss portion rotates together with the valve shaft, whereas the tooth portion and the elastic member can rotate relative to the valve shaft.

Abstract: The invention provides an intake manifold in which the number of parts or the number of processes of assembling can be reduced, and which is easy to assemble and assuring largely freedom in designing location of an intake control valve. An intake manifold 1 includes a hollow shell 2 and an intake control valve 3 functioning to control a combustion air-intake of an internal combustion engine. The shell 2 is formed by joining integrally a pair of half bodies 2a, 2b having a configuration of the shell 2 being halved in tube axial direction. The intake control valve 3 is built in forming an integral part at the time of joining the half bodies 2a, 2b together.

Abstract: Provide is an engine intake control device in which components such as attachment brackets, attachment screws for attaching respective solenoid valves around an engine are not required, and the number of attachment operations is reduced. The engine intake control device includes: a throttle chamber (1); a throttle valve (5) rotatably provided in the throttle chamber (1) using a valve shaft (2); an electric motor (6) provided outside an air passage (50); a coupling mechanism (51) for transmitting a driving force of the electric motor (6) to the valve shaft (2); a cover (7) provided on one side of the throttle chamber (1) to cover the coupling mechanism (51); and a solenoid valve (10) attached to the throttle chamber (1) for applying a negative pressure in a surge tank to an external negative pressure actuator and interrupting application of the negative pressure to the external negative pressure actuator. The solenoid valve (10) is provided integrally with the cover (7).

Abstract: A fuel injection apparatus in which a fuel injector, a stopper and a fuel delivery pipe can be efficiently assembled. The fuel injector, the stopper and the fuel delivery pipe are preliminarily connected in a predetermined positional relationship, and supported and secured by a resinous holder, a metal plate holder or the like. As a result, it becomes possible to handle the fuel injector, the stopper and the fuel delivery pipe as one part.

Abstract: Any specific member for fixation is omitted from a fuel injection device so that number of parts is reduced and the fuel injection device is constructed at a reasonable cost. The fuel injection device for use in an internal combustion engine is provided with a fuel distribution pipe 1, plural connecting pipe members 4, and plural fuel injection valves 2, and each of the fuel injection valves 2 is inserted into a connecting pipe member 4. A band-shaped protrusion 7 extends in the radial direction from a flange portion of the connecting pipe member 4 and further extends in parallel to the axis of the fuel injection valve 2. The band-shaped protrusion 7 is provided with a fitting hole 8, and each fuel injection valve 2 is provided with a protrusion 9 fitted into the fitting hole 8.

Abstract: Disclosed is a linear actuator in which a screw shaft portion is integrally formed on the distal end side of the rotation shaft of the motor, and in which the coupling and one of the support bases are eliminated, thereby achieving a reduction in the number of parts and an improvement in positioning accuracy. The linear actuator includes a screw shaft portion formed on the distal end side of the rotation shaft of a motor and a nut portion threadedly engaged with the screw shaft portion, in which the screw shaft portion and the rotation shaft are formed as an integral unit using the same material and in a seamless state.

Abstract: A fuel injection apparatus in which a fuel injector, a stopper and a fuel delivery pipe can be efficiently assembled. The fuel injector, the stopper and the fuel delivery pipe are preliminarily connected in a predetermined positional relationship, and supported and secured by a resinous holder, a metal plate holder or the like. As a result, it becomes possible to handle the fuel injector, the stopper and the fuel delivery pipe as one part.

Abstract: A throttle valve controller for an internal combustion engine in which a ring gear comprises a center body, a teeth portion, at least one rotation detent portion and at least one contraction detent portion for preventing the ring gear from rotation along the peripheral direction of the ring gear, wherein the rotation detent portion and the contraction detent portion are arranged with equal spacing along the peripheral direction of the ring gear. As a result, accuracy of the circularity of the ring gear is improved.

Abstract: In an intake air quantity controlling device for a combustion engine, a supporting portion of a bearing 10 for a valve shaft 9 having a choke valve 11, rotatably operated in an intake air passage 2, a supporting portion of a shaft of an intermediate gear 6, and a reference hole for a shaft of a rotor 12 fabricating a motor are formed in a metallic plate 15, whereby the intake air quantity controlling device has a high dimensional accuracy and a high strength.

Abstract: A throttle valve control device of an engine including a throttle valve pivotally arranged about a throttle valve shaft in a suction path of an engine, and a controller which controls the opening degree of the throttle valve in accordance with the amount of acceleration and which controls the throttle valve to pivot to a predetermined opening degree when a throttle valve driver is deactivated. The throttle valve is pivotal in a predetermined range of 90.degree. or more exceeding a control angular range in a normal control between a predetermined angular position for a minimum control opening degree and a predetermined angular position for a maximum control opening degree where a stopper is provided to regulate the pivoting of the throttle valve.