An airflow control valve structure includes a metal connecting shaft and a plastic valve body. The connection shaft includes an embedded portion. The connecting shaft is configured to rotate about a rotation axis. The embedded portion is embedded so that the valve body rotates integrally with the connecting shaft. The airflow control valve structure further includes a rotation restriction portion and a movement restriction portion. The rotation restriction portion is located on the embedded portion and restricts rotation of the embedded portion relative to the valve body. The movement restriction portion is located on the embedded portion and restricts movement of the embedded portion relative to the valve body in a direction along the rotation axis.

To improve responsiveness of fuel supply control, a rotary carburetor 100 has a nozzle 8 including a fuel discharge port 8a and a needle 10 disposed coaxially with the nozzle 8 and disposed with a portion inserted into the nozzle 8. The needle 10 can be displaced relative to the nozzle 8 to change an effective area of the fuel discharge port 8a. The rotary carburetor 100 has an electric motor 14 for displacing the needle 10 along an axis, and a drive mechanism component 12 interposed between the electric motor 14 and the needle 10 and converting a rotational movement of the electric motor into a linear movement.

To improve responsiveness of fuel supply control, a rotary carburetor 100 has a nozzle 8 including a fuel discharge port 8a and a needle 10 disposed coaxially with the nozzle 8 and disposed with a portion inserted into the nozzle 8. The needle 10 can be displaced relative to the nozzle 8 to change an effective area of the fuel discharge port 8a. The rotary carburetor 100 has an electric motor 14 for displacing the needle 10 along an axis, and a drive mechanism component 12 interposed between the electric motor 14 and the needle 10 and converting a rotational movement of the electric motor into a linear movement.

An improved carburetion system is provided. The carburetion system embodied in the present invention relocates the throttle plate anterior to venturi in an oversized throttle plate bore. By removing the throttle plate and shaft and its inherent interference imposed on the air/fuel mixture flow in the post-venturi chamber, the present invention delivers an increased cubic volume of uniform turbulent air/fuel mixture flow to the intake manifold. As a result, increasing the power at full throttle operation relative to the prior art.

A supercharger includes a first introduction part having a first flow channel; a second introduction part having a second flow channel; a chamber into which the exhaust gas is introduced; an outlet part having one or a plurality of outlet flow channels; and a valve member housed in the chamber. The chamber has a first introduction port that leads to the first flow channel, a second introduction port that leads to the second flow channel, and one or a plurality of outlet ports that lead to the outlet flow channel. A main circulation space is secured. The valve member is capable of opening or closing, and allows two or more opened ports among the first introduction port, the second introduction port, and the outlet port to communicate with each other through the main circulation space.

A fluid supply system for a machine such as an internal combustion engine includes a shutoff valve having an electrical actuator that includes a solenoid subassembly, and a stabilizer for the electrical valve actuator. The stabilizer includes a fitting structured to couple the shutoff valve to adjacent hardware in the fluid supply system, and a strongarm extending between the fitting and the solenoid assembly and clamped to the solenoid subassembly. A vibration-damping reinforced grommet may be clamped between the solenoid subassembly and the clamp.

Methods and systems are provided for a vacuum generating throttle. In one example, a method may include pivoting the throttle based on a desired airflow rate and/or vacuum replenishment, where the airflow rate and/or vacuum replenishment are adjusted based on one or more passages arranged interior to the throttle.

Methods and systems are provided for a vacuum generating throttle. In one example, a method may include pivoting the throttle based on a desired airflow rate and/or vacuum replenishment, where the airflow rate and/or vacuum replenishment are adjusted based on one or more passages arranged interior to the throttle.

An air intake device includes: a valve body which includes a rotating shaft; a bearing member which rotatably supports the rotating shaft of the valve body; and an air intake port which includes a concave portion on which the bearing member is disposed, wherein the bearing member includes a positioning portion for positioning the bearing member with respect to the concave portion of the air intake port, facing surfaces which extend from the positioning portion along the concave portion of the air intake port and face each other in an inward radial direction of the rotating shaft with respect to the concave portion, with a gap therebetween, and protruding portions which protrude toward the concave portion of the air intake port from the facing surfaces and seal the gap.

An air intake device includes: a valve body which includes a rotating shaft; a bearing member which rotatably supports the rotating shaft of the valve body; and an air intake port which includes a concave portion on which the bearing member is disposed, wherein the bearing member includes a positioning portion for positioning the bearing member with respect to the concave portion of the air intake port, facing surfaces which extend from the positioning portion along the concave portion of the air intake port and face each other in an inward radial direction of the rotating shaft with respect to the concave portion, with a gap therebetween, and protruding portions which protrude toward the concave portion of the air intake port from the facing surfaces and seal the gap.