US 4,852,539 AGranted

Supplemental air valve for internal combustion engine

OwnerChester W. Pankowinventor

Life of this patent

Estimating the term…

Loading patent…

Abstract

An air metering valve or supplemental air valve connectable in the PCV system of an internal combustion engine having a shiftable valving member which regulates the quantity of supplemental air introduced into the PCV return. The valve spool is spring biased to the open position by a calibration spring. Pressure chambers are formed on opposite sides of the actuating pistona nd connectable to engine vacuum sources. As the degree of vacuum varies in the vacum sources, the valve spool shifts between an open and closed position. The valve may also be used to provide supplemental ambient combustion air under vacuum control independent of the PCV system. In another embodiment of the invention, the major valve components such as the valve body and shiftable valving member are fabricated from suitable plastic materials.

Claims4

Dependent claims

A supplemental air valve for regulating the admission of supplemental combustion air to an internal combustion engine, said valve comprising:

(a) a valve body defining a bore, at least a portion of said bore defining an air chamber having an inlet and an outlet communicating with said air chamber, said outlet being adapted to be connected to an engine manifold;
(b) a valve member reciprocal within said bore having a piston member dividing at least a portion of said bore into two pressure chambers, said pressure chambers having means for connection to a source of engine vacuum;
(c) said valve member being shiftable from an open position permitting ambient air to enter through said inlet to said air chamber and having a closed position blocking admission of air to said air chamber;
and
(d) resilient means normally urging said valve body to said closed position, said resilient means being selectively adjustable to provide a predetermined biasing force on said piston whereby said piston is responsive to changes in engine vacuum to control the admission of supplemental air to said engine.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 07/131,666Filed 11 Dec 1987 · continuation in part
Priority: 25 Aug 1986
Granted: 1 Aug 1989
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

F01M 13/023
Using engine inlet suction: control valves in suction conduit
F02M 23/09
Dependent on pressure in main combustion-air induction system , e.g. pneumatic-type apparatus: using valves directly opened by low pressure
Y02T 10/12
Internal combustion engine [ICE] based vehicles: improving ICE efficiencies
Y10T 137/7749
Combustion engine induction type: valve in auxiliary inlet to induction line