摘要:
A rotation-angle-detection device includes a main housing, a resinous cover for covering an opening of the main housing, a permanent magnet disposed at the main housing to be rotatable in response to rotation of a throttle valve, and a magnetic sensor. The cover is longer in longitudinal direction than in lateral direction, and the magnetic sensor is fixed to the resinous cover. The magnetic sensor is disposed so that the detection direction and the longitudinal direction of the cover cross each other at a right angle.
摘要:
An integrated valve device includes a casing having cylindrical portions each defining therein a fluid passage. The fluid passage accommodates a valve being adapted to opening and closing the fluid passage. A shaft extends through the valves to manipulate positions of the valves all together. Each cylindrical portion has a pair of wall portions each opposed to corresponding one sidewall surface of each of the valves. The pair of wall portions is located in a range out of an open-close range between a full close position and a full open position of the valve. Each wall portion has a protrusion for supporting the valve by being in direct contact with corresponding one of the sidewall surfaces when the protrusions of the pair of wall portions interpose therebetween the valve.
摘要:
In a manufacturing method of a fluid control apparatus, a valve integrally formed with a valve shaft is assembled inside a housing. First and second bearing members are assembled inside the housing by inserting each of the first and second bearing members into a corresponding space between the housing and the valve shaft from a corresponding longitudinal end side of the valve shaft. A longitudinal position of the valve relative to the housing is adjusted through one of the following methods. A first contact portion is brought into contact with a first side face, and a second contact portion is brought into contact with a second side face. A first contact surface is brought into contact with a first longitudinal end face, and a second contact surface is brought into contact with a second longitudinal end face.
摘要:
A manufacturing method for a plural valve assembly is disclosed that includes providing a plurality of housings that each define a channel. Each housing includes at least one valve anchoring portion. The method also includes providing a plurality valves and providing a shaft. The method further includes coupling the plurality of valves to corresponding ones of the housings such that the valves can move relative to the housing between an open position and a closed position. The valves abut against the respective valve anchoring portion in the closed position. The method also includes coupling the shaft to the plurality of valves. Each of the plurality of valves abuts against the respective valve anchoring portion as the shaft is coupled thereto.
摘要:
A throttle device which prevents the entry of foreign compounds into a slidable contact portion between a brush and a commutator is provided to prevent the malfunctioning of a motor. A first shielding portion is integrally formed in a brush holder, which is attached to a yoke of a motor for holding a brush. The plate-shaped first shielding portion covers the vicinity of the yoke in the outer periphery of the yoke. Accordingly, the first shielding portion covers a gap left between the yoke and the brush holder, and a slidable contact portion between a commutator and the brush on a throttle gear side. Therefore, the first shielding portion prevents a foreign compound, generated in an engagement portion between the throttle gear and a reduction gear and falling onto a motor, from moving to the slidable contact portion, so that it is possible to prevent poor contact between the commutator and the brush.
摘要:
In an electronically controlled throttle apparatus, a coil spring is shaped to extend from a U-shaped hook portion which is a joint between a first spring portion having a returning function and a second spring portion having an opening function to the other end of the second spring portion. A coating of a lubricant is provided on a sliding contact area between the inside circumferential surface of the coil spring and the outside circumferential surface of the second spring inside circumferential guide. Thus, the sliding resistance in relative motion between the coil spring and the second spring inside circumferential guide can be significantly reduced.
摘要:
An apparatus for controlling a throttle valve has a body member made of resin. The body member contains a motor for controlling a throttle valve. The motor has a yoke as a one of components thereof. The yoke is exposed to an intake passage at a slightly upstream side of the throttle valve. According to the arrangement, heat radiation from the motor is improved by intake airflow, and the throttle valve can be prevented from an icing malfunction.
摘要:
A valve assembly is disclosed that includes a first and a second valve assembly parts that collectively define a duct. The valve assembly also includes a valve unit that includes a housing defining a fluid flow path therethrough. The valve unit is coupled to the first valve assembly part such that the fluid flow path is in fluid communication with the duct. A control valve is also included for controlling flow of fluid in the flow path. Furthermore, the valve assembly includes a sealing member that seals a space between the first valve assembly part and the second valve assembly part, that seals a space between the first valve assembly part and the valve unit, and that dampens vibration transmitted to the valve unit.
摘要:
A method of manufacturing a valve unit is disclosed that includes providing a plurality of injection molding dies that define a cavity corresponding in shape to the valve unit. The valve unit includes a housing and a valve, and the housing defines a fluid flow path with an axis having an upstream direction and a downstream direction corresponding to a predetermined direction of fluid flow in the fluid flow path. The valve is cantilevered and includes a valve body having a coupled end rotationally coupled to the housing and a free end, and the valve body rotates about the coupled end to thereby change flow through the fluid flow path. The method also includes simultaneously molding the housing and the valve within the cavity such that the valve body is formed with the free end extending away from the downstream direction of the axis of the fluid flow path.
摘要:
An air-intake device includes a throttle valve pivotally movable around a shaft connected to one end of the throttle valve and an airflow passage formed in the intake air passage above an upper end of the throttle valve. In a region where an amount of intake air is small (i.e., in a region where an opening-degree of the throttle valve is small), an amount of intake air passing through the airflow passage is precisely controlled. In the same region, a high-speed airflow is generated in the airflow passage thereby to formulate a uniform air-fuel mixture in a combustion chamber of an internal combustion engine. These functions are easily realized by simply adding a member for forming the airflow passage to a throttle valve unit disposed in the intake air passage.