Abstract: An intake system has an intake pipe, a passage member which is inserted into a peripheral wall of the intake pipe in a radial direction to form an intake passage passing across a front end and a rear end thereof in a direction of insertion along with the intake pipe, a seal member which is arranged at a seam between the peripheral wall of the intake pipe and the passage member and seals the seam, and an elastic member which is made of the same material as that of the seal member and is interposed between the peripheral wall of the intake pipe and the front end of the passage member so as to be capable of giving the front end of the passage member an elastic reaction force in a direction perpendicular to the axis of the direction of insertion.

Abstract: In a gasket for sealing a gap between a throttle body and an intake manifold that are assembled obliquely to each other, sealing performance is stabilized by preventing the gasket from falling or being caught. A gasket (1) with a substantially pentagonal cross-section is set in an installation groove (21) before a throttle body (20) and an intake manifold (30) are assembled. The gasket (1) is then brought to be in contact only with a close-contact surface (31) of the intake manifold, to which surface, with a throttle body (20) assembled to an intake manifold (30), the gasket (1) in the installation groove is in close contact. After that the throttle body (20) is assembled to the intake manifold (30) by making the gasket (1) to be in sliding contact with the close-contact surface (31).

Abstract: A bearing support device includes a rotor, a bearing member, and a bearing holding member. The rotor rotates about a rotation center axis. The bearing member rotatably supports the rotor within a bearing hole passing through the bearing member. The bearing holding member holds the bearing member in a secure manner within a fitting hole that passes through the bearing holding member along the center axis of the rotor via an engagement force produced by tightly fitting the bearing member. The rotor and bearing member are made of a resin. An engagement section is provided for tightly fitting the bearing member into the fitting hole relative to the bearing hole to enable an engagement force produced by the tight fitting to act in a direction that does not affect an inner diameter dimension of the bearing hole.

Abstract: An air intake system includes an intake pipe and a throttle body. The throttle body is inserted in a middle section of the intake pipe between upstream and down stream ends so as to define an intake passage. The throttle body movably receives a throttle valve which opens and closes the intake passage. Flow blocking members are integrally formed with the intake pipe for blocking specific fluid, such as condensate of intake gas, from flowing into the throttle valve in the intake passage. Therefore, it can prevent the specific fluid from sticking to the throttle valve. Besides, because the throttle body need not to be integrally formed with the flow blocking members, a dimensional accuracy of the throttle body can be secured.

Abstract: An intermediate resin molded body 30 is put between two outer resin molded bodies 10, 20, and a molten resin is injected substantially simultaneously into a first interface between one outer resin molded body 10 of the two outer resin molded bodies and the intermediate resin molded body 30 and a second interface between the other outer resin molded body 20 and the intermediate resin body 30, so that the two outer resin molded bodies 10, 20 and the intermediate resin molded body 30 are welded together.

Abstract: An air intake system includes an intake pipe and a throttle body. The throttle body is inserted in a middle section of the intake pipe between upstream and down stream ends so as to define an intake passage. The throttle body movably receives a throttle valve which opens and closes the intake passage. Flow blocking members are integrally formed with the intake pipe for blocking specific fluid, such as condensate of intake gas, from flowing into the throttle valve in the intake passage. Therefore, it can prevent the specific fluid from sticking to the throttle valve. Besides, because the throttle body need not to be integrally formed with the flow blocking members, a dimensional accuracy of the throttle body can be secured.

Abstract: An intake system has an intake pipe, a passage member which is inserted into a peripheral wall of the intake pipe in a radial direction to form an intake passage passing across a front end and a rear end thereof in a direction of insertion along with the intake pipe, a seal member which is arranged at a seam between the peripheral wall of the intake pipe and the passage member and seals the seam, and an elastic member which is made of the same material as that of the seal member and is interposed between the peripheral wall of the intake pipe and the front end of the passage member so as to be capable of giving the front end of the passage member an elastic reaction force in a direction perpendicular to the axis of the direction of insertion.

Abstract: A suction device used for an internal combustion engine includes a throttle passage, which is arranged on the upstream side, and also includes an air connector, a surge tank and suction manifolds which are arranged on the downstream side of the throttle passage. An opening section of the air connector arranged in the longitudinal direction on a side wall face of the surge tank is provided on a wall face corresponding to a position which becomes a substantial center of the suction manifold which is open to the surge tank. Due to the foregoing, intake air can be evenly distributed to the suction manifold, and lengths of the passages can be made equal to each other. Accordingly, the generation of a rumbling noise can be suppressed. Further, the suction manifold substantially encircles the outer circumferential wall faces of the surge tank and others.

Abstract: A suction device used for an internal combustion engine includes a throttle passage, which is arranged on the upstream side, and also includes an air connector, a surge tank and suction manifolds which are arranged on the downstream side of the throttle passage. An opening section of the air connector arranged in the longitudinal direction on a side wall face of the surge tank is provided on a wall face corresponding to a position which becomes a substantial center of the suction manifold which is open to the surge tank. Due to the foregoing, intake air can be evenly distributed to the suction manifold, and lengths of the passages can be made equal to each other. Accordingly, the generation of a rumbling noise can be suppressed. Further, the suction manifold substantially encircles the outer circumferential wall faces of the surge tank and others.

Abstract: A hollow-cylindrical heat conduction portion is formed on a throttle body in such a way as to protrude outwardly therefrom in the radial direction. The throttle body and the heat conduction portion are integrally formed using metal material such as aluminum having excellent heat conductivity or resin material containing such a metal material. A vent hole communicating the interior with the exterior of a head cover is formed in the head cover. Through the vent hole there is inserted the heat conduction portion, and the clearance between an outer-peripheral wall thereof and an inner wall of the vent hole is sealed by means of a seal member.

Abstract: Fuel supply devices for an engine are disposed within an intake duct located upstream of an air cleaner. Thus, the fuel supply devices such as fuel injection valves and a fuel supply pipe are always cooled by intake air flow while the engine is being driven. In addition, heat conducted from the engine to the fuel supply device can be insulated by the intake duct when the engine is stopped. Further, since the intake duct located upstream of the air cleaner does not dispose functional parts such as a filter therein, a high degree of freedom for mounting the intake duct on the engine is maintained so that the intake duct can be easily disposed at the position where the fuel supply devices are located.

Abstract: An air cleaner, a throttle, a surge tank and air-intake pipes of an intake manifold are combined in a unit and a fuel delivery pipe and fuel injectors are installed in the unit before the unit of an air-intake device is assembled to an internal combustion engine. Cases of the above members are integrally formed thereby to reduce the size of the device and material used for the device. A dusty-side of the air cleaner is disposed under a filter element to prevent dust and water from getting into the clean-side of the filter element when the element is removed to have serviced or inspected.

Abstract: An air cleaner, a throttle, a surge tank and air-intake pipes of an intake manifold are combined in a unit and a fuel delivery pipe and fuel injectors are installed in the unit before the unit of an air-intake device is assembled to an internal combustion engine. Cases of the above members are integrally formed thereby to reduce the size of the device and material used for the device. A dusty-side of the air cleaner is disposed under a filter element to prevent dust and water from getting into the clean-side of the filter element when the element is removed to have serviced or inspected.

Abstract: An air cleaner, a throttle, a surge tank and air-intake pipes of an intake manifold are combined in a unit and a fuel delivery pipe and fuel injectors are installed in the unit before the unit of an air-intake device is assembled to an internal combustion engine. Cases of the above members are integrally formed thereby to reduce the size of the device and material used for the device. A dusty-side of the air cleaner is disposed under a filter element to prevent dust and water from getting into the clean-side of the filter element when the element is removed to have serviced or inspected.

Abstract: An air cleaner for use in an intake air passage connected to an engine of a vehicle, including a housing separable into two housings, a filter element received in one of the two housings, a sealing member for sealing contact with a sealing surface of the other housing, and a hinge device for rotatably connecting the two housings to each other, the hinge device including a receiving member having a receiving opening, and an axis member for being received in the receiving member through the receiving opening, the axis and receiving members being displaceable relative to each other substantially along a plane in which the sealing member extends, the air cleaner further including a clamp device cooperating with the hinge device to secure the two housings to each other, and a protector including two abutting portions, the protector allowing the sealing surface and the sealing member to be brought into the sealing contact with each other when the axis member is positioned at a hinging position in the receiving memb