Adjustable throttle bore restrictor

摘要

An adjustable restrictor device for controlling flow of induction air into an engine. The restrictor device may comprise a generally flat compact housing which is installed between a carburetor and intake manifold of an engine. The housing may have throughbores to allow air flow, which coincide in location to carburetor bores. The restrictor device may have two individual restrictors enclosed therein, each movable to positions which progressively obstruct and open the throughbores to control flow of inducted air. Each restrictor may be manually controlled in common by a rotatable control shaft. Threading of the knobs may be opposite handed, thereby enabling the restrictors to move similarly in effect as to controlling air flow but in opposite directions.

主权项

1. An adjustable restrictor device for controlling flow of inducted combustion air into an internal combustion engine having a carburetion device and an intake manifold, comprising:
a housing comprising a face surface bearing at least one opening for passing combustion air through the housing in a direction generally perpendicular to the face surface, the opening having an axis coinciding with direction of combustion air flowing through the adjustable restrictor; at least one restrictor supported by the housing and fully enclosed therein, wherein each restrictor is disposed to move in a direction generally parallel to the face surface of the housing; and a control shaft disposed to engage the restrictor so as to move the restrictor in the direction parallel to the face surface of the housing, wherein the control shaft projects to the exterior of the housing so as to be accessible for movement from the exterior of the housing, wherein the control shaft is rotatably supported on the housing in a threaded hole and is disposed to move helically in the direction parallel to the face surface of the housing when the control shaft is rotated.