An engine air induction control system having throttle valve assembly is disclosed, the throttle valve assembly having a streamlined divergent-convergent valve member slidingly mounted within a divergent-convergent valve chamber defined by a wall of a throttle body. The streamlined valve member is moveable towards and away from an inlet passage of the throttle body by an actuator mechanism to vary an annular air flow area defined between the valve member and the wall defining the valve chamber.

An engine air induction control system having throttle valve assembly is disclosed, the throttle valve assembly having a streamlined divergent-convergent valve member slidingly mounted within a divergent-convergent valve chamber defined by a wall of a throttle body. The streamlined valve member is moveable towards and away from an inlet passage of the throttle body by an actuator mechanism to vary an annular air flow area defined between the valve member and the wall defining the valve chamber.

Methods and systems are provided for vacuum generating devices. In one example, a system includes a vacuum generating device having an annular venturi passage located between two identical halves.

Methods and systems are provided for vacuum generating devices. In one example, a system includes a vacuum generating device having an annular venturi passage located between two identical halves.

A throttle valve assembly provided. The throttle valve assembly includes a wedge shaped valve member slidingly mounted within a throttle body defining offset inlet and outlet passages. The wedge shaped valve member is moveable towards and away from the inlet passage by an actuator mechanism to vary the air flow area in a throttle passage of the throttle valve assembly.

A linear actuator includes a stator assembly and a rotor assembly operatively associated with the stator assembly and mounted for rotation with respect to the stator assembly. A shaft is restricted from rotation and is associated with the rotor assembly such that rotation of the rotor assembly causes linear movement of the shaft. A capnut is associated with a distal end of the shaft for movement therewith. A shroud is coupled to the stator assembly and substantially surrounds the capnut. The shroud includes a valve seat, and an inlet communicating with an outlet through a throttle opening adjacent to the valve seat. The shaft and associated capnut are constructed and arranged to move relative to the valve seat to control air flow between the inlet and the outlet.

A linear actuator includes a stator assembly and a rotor assembly operatively associated with the stator assembly and mounted for rotation with respect to the stator assembly. A shaft is restricted from rotation and is associated with the rotor assembly such that rotation of the rotor assembly causes linear movement of the shaft. A capnut is associated with a distal end of the shaft for movement therewith. A shroud is coupled to the stator assembly and substantially surrounds the capnut. The shroud includes a valve seat, and an inlet communicating with an outlet through a throttle opening adjacent to the valve seat. The shaft and associated capnut are constructed and arranged to move relative to the valve seat to control air flow between the inlet and the outlet.

An EGR device includes a housing and a baffle. The housing has an outer pipe and a wall. The wall extends radially inward from an end of the outer pipe. The outer pipe defines an EGR inlet. The baffle is accommodated in the outer pipe. The baffle includes an inner pipe defining an inner passage internally and defining an annular passage externally with the outer pipe. The annular passage is configured to communicate with the EGR inlet. The housing has at least one diffuser extending from the wall. The at least one diffuser is located in the annular passage.

An EGR device includes a housing and a baffle. The housing has an outer pipe and a wall. The wall extends radially inward from an end of the outer pipe. The outer pipe defines an EGR inlet. The baffle is accommodated in the outer pipe. The baffle includes an inner pipe defining an inner passage internally and defining an annular passage externally with the outer pipe. The annular passage is configured to communicate with the EGR inlet. The housing has at least one diffuser extending from the wall. The at least one diffuser is located in the annular passage.

A multiple throttle device 100 includes: a throttle body 12 having a plurality of intake passages 10; a plurality of throttle valves 20; a plurality of secondary passages 102 respectively bypassing the plurality of throttle valves 20; and an air amount adjustment valve 30 for adjusting an amount of air flowing through the plurality of secondary passages 102. The air amount adjustment valve 30 includes a valve plug 40, and a guide part 50 for guiding the valve plug 40 in the axial direction. Opening into the inner peripheral surface 51 of the guide part 50 are: a plurality of first communication holes 52 respectively communicating with downstream sides of the throttle valves 20 in the plurality of intake passages 10; and a second communication hole 54 communicating with a canister 9 for collecting fuel vapor. The actuator 60 adjusts a position of the valve plug 40 in the axial direction such that a first effective opening area of each of the first communication holes 52 which is not blocked by the valve plug 40 and a second effective opening area of the second communication hole 54 which is not blocked by the valve plug 40 change.