Modulating air control valve
AssigneeOlson Engineering, Inc.
InventorDonel R. Olson
Life of this patent
Estimating the term…
Abstract
An improved modulating air control valve which intermittently introduces air into the intake manifold of internal combustion engines as a function of the vacuum differential between the intake manifold and the ported vacuum at the carburetor. The valve includes a unidirectional flow valve which prevents hydrocarbon gases contained in the intake manifold from deteriorating the internal diaphragm of the valve.
Claims14
In an internal combustion engine comprising an intake manifold maintained at partial vacuum and having an air injection port formed thereon, a carburetor having a throttle valve pivotally mounted therein, a vacuum advance port located adjacent said throttle valve to produce a variable vacuum source, a first conduit connected to said vacuum advance port, and a second conduit connected to said air injection port, a modulating air control valve connected to be controlled by said first conduit, said valve, under such control, supplying regulated amounts of ambient air to said second conduit to selectively introduce ambient air into said intake manifold in an amount regulated by engine vacuum, said valve comprising:
- a valve body having an aperture therethrough with an annular seat;
- orifice means for admitting ambient air into said valve;
- diaphragm means for cooperating with said annular seat, said diaphragm being movable from said annular seat in response to a pressure differential to permit ambient air to flow into said intake manifold;
- and
- a unidirectional flow valve responsive, when said diaphragm admits ambient air into said valve, to the pressure differential between ambient and said intake manifold to allow air to flow into said intake manifold, but preventing hydrocarbon gases contained in said intake manifold from flowing toward said diaphragm or said orifice means.
A modulating air control valve for use in controlling exhaust pollutants in internal combustion engines, comprising:
- a valve body comprising first and second body segments providing a central aperture including a valve seat;
- orifice means extending through said second body segment for admitting ambient air into said valve;
- separation means for cooperating with said valve seat to separate said second body segment from said orifice means, said separation means being movable from said valve seat in response to a pressure differential;
- and
- a unidirectional flow valve disposed in said central aperture in said second housing segment to permit air flow through the valve in one direction only, said modulating air control valve periodically introducing air into an intake manifold of an internal combustion engine in response to varying engine vacuum.
Dependencies are inferred from the claim text.