US 6,601,821 B2
Proportional control valve assembly for exhaust gas recirculation systemGeneral
US 6,601,821 B2
Proportional control valve assembly for exhaust gas recirculation system
Tech Center:
3700 Mechanical Engineering, Manufacturing and Medical Devices/Processes
Examiner:
Ehud Gartenberg
Art Unit:
3754 Fluid Handling and Dispensing
Agent:
Eugene Stephens & Associates
Inventors:
Jeffrey A. Tyler
Assignee:
Priority:
11/17/00
Filed:
11/15/01
Granted:
08/05/03
Expiration:
11/17/20
Abstract
A two-stage proportional control valve assembly regulates flow of a first fluid such as an engine exhaust gas using a second fluid such as engine oil for power. A directional valve under control of an electrical actuator regulates flows of the second fluid to operate a fluid-powered actuator. A mechanical connection between the fluid powered actuator and a flow control valve for regulating flows of the first fluid enables the electrical actuator to indirectly control the flow control valve with a minimum draw.
Cooperative Patent Classification (CPC)
F02F02M26/59F02MF15B13/0435F15BF16K31/1221F16K