Abstract: An ejector including a nozzle communicating with a fluid inlet, a diffuser communicating with a fluid outlet, and a decompression chamber placed between the nozzle and he diffuser. The ejector is arranged to generate a negative pressure in the decompression chamber by a fluid ejected from the nozzle. A target negative pressure P in the decompression chamber is set in a range of “40 kPa<P?50 kPa”. A SD/Sd ratio between a sectional area SD of an inlet of the diffuser and a sectional area Sd of an outlet of the nozzle is determined to meet a relation: “1.20?SD/Sd?4.08?0.047P”.

Abstract: A throttle device with a throttle body and first and second supports supporting a motor for controlling the opening position of the throttle of a valve. The first and second supports support the motor from both sides of the motor in the longitudinal direction. At least one of the first and second supports may also elastically support the motor, and may be a metallic leaf spring disposed within the throttle body.

Abstract: A throttle gear 5 is fastened to a throttle shaft 2. A relief lever 9 is pivotally mounted on the throttle shaft 2. A return spring 11 urges the relief lever 9 in a valve closing direction with respect to a throttle body 1. The throttle body 1 contacts the relief lever 9 at a second contact position 20A when the relief lever 9 pivots to a predetermined pivot position B in the valve closing direction. A relief spring 10 urges the throttle gear 5 in a valve opening direction with respect to the relief lever 9. The relief lever 9 contacts the throttle gear 5 at a first contact position 20B when the throttle gear 5 pivots to the predetermined pivot position B in the valve opening direction. The first and second contact positions 20B, 20A are located within or to one side of a plane P that is perpendicular to the rotational axis L of the throttle shaft 2. Plane P preferably includes a third position 20C at which the biasing force of the return spring 11 acts on the relief lever 9.

Abstract: Throttle devices may include a throttle body. First and second supports preferably support a motor for controlling the opening position of a throttle valve. The first support and the second support preferably support the motor from both sides of the motor in the longitudinal direction. At least one of the first and second supports preferably elastically supports the motor and may comprise, e.g., a metallic leaf spring disposed within the throttle body.

Abstract: A throttle control apparatus for an internal combustion engine in which wear particles due to sliding between components and vibration wear particles produced between components by engine vibrations are prevented from entering the area between a brush of a throttle sensor and a sensor substrate to prevent the occurrence of a contact failure between the brush and the substrate, thereby making it possible to detect an accurate throttle opening. A brush of a sensor unit is secured to an outer end portion of a throttle shaft projecting from a cover, and the sensor unit is accommodated in a sensor chamber formed outside the cover. A gear chamber for accommodating gears and the sensor chamber are isolated from each other by a dust seal. Therefore, wear particles will not enter the sensor chamber and accumulate in the area between the brush and the sensor substrate to cause a contact failure.

Abstract: A throttle may include a throttle gear 5 is fastened to a throttle shaft 2. A relief lever 9 is pivotally mounted on the throttle shaft 2. A return spring 11 is adapted to urge the relief lever 9 in a valve closing direction with respect to a throttle body 1. A first contact means 20a is provided on the throttle body 1 and the relief lever 9 and the throttle body 1 contacts the relief lever 9 when the relief lever 9 pivots to a predetermined pivot position B in the valve closing direction. A relief spring 10 is adapted to urge the throttle gear 5 in a valve opening direction with respect to the relief lever 9. A second contact means 20b is provided on the throttle gear 5 and the relief lever 9 and the relief lever 9 contacts the throttle gear 5 when the throttle gear 5 pivots to the predetermined pivot position B in the valve opening direction. The predetermined pivot position B is preferably an initial or standby throttle valve position.