The present invention relates to a valve for controlling the volume and flow characteristics of a fluid in a predictable controllable manner. Specifically, the invention relates to an air valve design for an internal combustion engine throttle body that proportionately manages air flow, pressure, and velocities through all stages of opening with consistent and measurable parameters through a concentric or near-concentric opening.

The engine shut-off valve system includes a housing, a gate member, a rotating lever, a locking piston assembly, and a closing piston assembly. The system is installed in fluid connection with a flow line so that air flow passes through a passageway in the housing with the gate member in the locked configuration. The air flow through the passageway stops with the gate member in the closed configuration. The gate member has an asymmetry so that the forces of the spring of the closing piston assembly and the spring of the locking piston assembly are cooperative to actuate between the closed configuration and the locked configuration, while wearing on the gate member differently so as to extend the working life of the valve system. The closing piston assembly and the locking piston assembly are separately accessible for maintenance.

The engine shut-off valve system includes a housing, a gate member, a rotating lever, a locking piston assembly, and a closing piston assembly. The system is installed in fluid connection with a flow line so that air flow passes through a passageway in the housing with the gate member in the locked configuration. The air flow through the passageway stops with the gate member in the closed configuration. The gate member has an asymmetry so that the forces of the spring of the closing piston assembly and the spring of the locking piston assembly are cooperative to actuate between the closed configuration and the locked configuration, while wearing on the gate member differently so as to extend the working life of the valve system. The closing piston assembly and the locking piston assembly are separately accessible for maintenance.

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 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.

Various systems and methods are described for generating vacuum within an engine intake. A system may comprise an intake throttle including a slidable throttle valve, where the throttle valve may comprise a hollow interior passage, which in turn may be coupled to a vacuum consumption device. When vacuum is demanded by the vacuum consumption device, the throttle valve may be displaced downstream within the throttle to decrease airflow through the throttle and vacuum may be generated at tip of the throttle valve by flowing intake air between the throttle valve and a throttle fixture.

Various systems and methods are described for generating vacuum within an engine intake. A system may comprise an intake throttle including a slidable throttle valve, where the throttle valve may comprise a hollow interior passage, which in turn may be coupled to a vacuum consumption device. When vacuum is demanded by the vacuum consumption device, the throttle valve may be displaced downstream within the throttle to decrease airflow through the throttle and vacuum may be generated at tip of the throttle valve by flowing intake air between the throttle valve and a throttle fixture.

High pressure loop exhaust gas circulation is achieved in an exhaust system (10) of an engine (12) by providing an adjustable valve (100) in an exhaust passage (18) of the engine (12). The valve (100) is configured to control fluid flow through the passage (18) and generate pressure to drive the high pressure exhaust gas recirculation. The valve (100) includes a valve inner surface (110) that has a curvilinear profile when viewed in longitudinal cross section. An actuator (140) is connected to the valve (100), and is configured to move the valve (100) relative to the exhaust passage (18) so as to control exhaust gas pressure within the exhaust passage (18). In some embodiments, a pilot tube (280) is used in combination with the valve (100) to generate high pressure exhaust gas recirculation at the engine (12) intake.

The flow rate controlling device according to the present invention comprises: a base that has an opening portion a ring member that is provided encompassing the opening portion and that can rotate around the opening portion a motor for rotating the ring member, and a plurality of blade members that are supported on the base to the outside of the opening portion in the radial direction, and that can rotate around rotary shafts that are parallel to the axis of the opening portion, wherein: groove portions are formed in the ring member; protruding portions that can slide within the groove portions are formed on the blade members; and the motor rotates the ring member to slide the protruding portions within the groove portions to rotate the plurality of blade members to open and close the opening portion.

The flow rate controlling device according to the present invention comprises: a base that has an opening portion a ring member that is provided encompassing the opening portion and that can rotate around the opening portion a motor for rotating the ring member, and a plurality of blade members that are supported on the base to the outside of the opening portion in the radial direction, and that can rotate around rotary shafts that are parallel to the axis of the opening portion, wherein: groove portions are formed in the ring member; protruding portions that can slide within the groove portions are formed on the blade members; and the motor rotates the ring member to slide the protruding portions within the groove portions to rotate the plurality of blade members to open and close the opening portion.