Exhaust gas recirculation valve with adjustable pressure transducer

Patent · Tue Jun 03 00:00:00 EDT 1980

OSTI ID:6447862

Dunham, D P; Treadwell, W A

An exhaust gas recirculation valve assembly is provided for controlling the recirculation of exhaust gases in an internal combustion engine. The assembly includes a fixed body portion having an exhaust inlet and an exhaust outlet port and an adjustable exhaust back-pressure transducer portion movable within the valve. A diaphragm is attached to the body and to the upper and lower housing shells of the transducer to define in the body portion a vacuum chamber on one side and an atmospheric chamber on the other side. A second atmospheric or air bleed chamber and an exhaust chamber are provided by portions of the diaphragm in the transducer portion. The transducer has an air bleed valve responsive to exhaust back pressure which controls the vacuum in the vacuum chamber for effecting movement of a valve for controlling flow between the inlet and outlet. The back pressure transducer has an adjustment which includes a threaded member extending through the upper housing shell and engaging an annular seat registered over the upper end of a biasing compression spring, the lower end of which reacts against the transducer diaphragm. Selective advancement or retraction of the threaded member is effective for varying the magnitude of the biasing force on the diaphragm portion within the transducer.

• Assignee: Eaton Corp
• Patent Number(s): US 4205644
• OSTI ID: 6447862
• Resource Relation: Patent File Date: Filed date 25 Jul 1978; Other Information: PAT-APPL-927790
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
EXHAUST RECIRCULATION SYSTEMS
PRESSURE CONTROL
AIR POLLUTION CONTROL
INTERNAL COMBUSTION ENGINES
PRESSURE REGULATORS
TRANSDUCERS
VALVES
CONTROL
CONTROL EQUIPMENT
ENGINES
EQUIPMENT
EXHAUST SYSTEMS
FLOW REGULATORS
HEAT ENGINES
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
330700* - Advanced Propulsion Systems- Emission Control