Sequential control valve

Details Sequential control valve Sequential control valve

2007-08-07

2007-08-07

Wolfe, Jr., Willis R. (Department: 3747)

Internal-combustion engines

Charge forming device

Exhaust gas used with the combustible mixture

C123S568180, C123S568190

Reexamination Certificate

active

11343423

ABSTRACT:
A system for controlling the mixture of an air flow and an exhaust gas flow utilizing two valves, the first valve at least partially positioned in an air intake conduit and regulating the flow of fluid through the air conduit, and the second valve positioned in an exhaust gas recirculation conduit for regulating the flow of exhaust gas. The control scheme presenting a sequential or stepwise control sequence, where the first valve is actuated over a first pressure range and the second valve is actuated over a second pressure range such that valves operate in a sequential manner.

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patent: 2006/0180224 (2006-08-01), Berggren et al.

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