Exhaust gas recycling modulator valve assembly
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 a spring a predetermined amount in an upward direction, and a lower diaphragm which is also biased by a spring 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 4351285
- OSTI ID:
- 6951362
- Resource Relation:
- Patent File Date: Filed date 2 Sep 1980; Other Information: PAT-APPL-183594
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
EXHAUST RECIRCULATION SYSTEMS
VALVES
INTERNAL COMBUSTION ENGINES
DESIGN
CONTROL EQUIPMENT
OPERATION
POLLUTION CONTROL EQUIPMENT
PRESSURE DEPENDENCE
SPRINGS
ENGINES
EQUIPMENT
EXHAUST SYSTEMS
FLOW REGULATORS
HEAT ENGINES
MACHINE PARTS
330100* - Internal Combustion Engines
330700 - Advanced Propulsion Systems- Emission Control