Exhaust gas recycling modulator valve assembly

Patent · Tue Mar 17 00:00:00 EST 1981

OSTI ID:6368213

Bradshaw, C E

A valve assembly is provided for controlling the recirculation of exhaust gases in an internal combustion engine. The assembly includes a lower housing portion having an exhaust gas inlet and an exhaust outlet port. An upper housing member has mounted therein an upper flexible diaphragm biased by spring biased a predetermined amount in an upward direction and a lower diaphragm which is also biased by a spring biased a predetermined amount in a downward direction. The upper and lower diaphragms define a control chamber which is communicated with an engine intake manifold vacuum source. An axially movable valve member is connected to the lower end of a valve stem which is in turn connected to the lower diaphragm. An adjustment feature permits the preload on both of the biasing springs to precisely adjusted in order that a desired precise exhaust gas recirculation flow as a function of intake manifold vacuum can be achieved after final assembly of the valve. An alternate embodiment of the invention incorporates a bleed valve assembly responsive to exhaust gas back pressure which enables the valve to discriminate between various engine loadings.

• Assignee: Eaton Corp
• Patent Number(s): US 4256076
• OSTI ID: 6368213
• Resource Relation: Patent File Date: Filed date 19 Jun 1979
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
EXHAUST RECIRCULATION SYSTEMS
VALVES
INTERNAL COMBUSTION ENGINES
EXHAUST GASES
GAS FLOW
PRESSURE DEPENDENCE
CONTROL EQUIPMENT
ENGINES
EQUIPMENT
EXHAUST SYSTEMS
FLOW REGULATORS
FLUID FLOW
FLUIDS
GASEOUS WASTES
GASES
HEAT ENGINES
POLLUTION CONTROL EQUIPMENT
WASTES
330100* - Internal Combustion Engines
330700 - Advanced Propulsion Systems- Emission Control