Outboard motor with an exhaust gas recirculation system and...

Details Outboard motor with an exhaust gas recirculation system and... Outboard motor with an exhaust gas recirculation system and...

2011-07-19

2011-07-19

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

Internal-combustion engines

Charge forming device

Exhaust gas used with the combustible mixture

C440S08900C

Reexamination Certificate

active

07980231

ABSTRACT:
A control system for an outboard motor provides an EGR valve and an idle exhaust relief valve which are under the control of a controller that opens and closes the valves as a function of the rotational speed of a crankshaft of the engine. The EGR valve controls the flow of exhaust gas from an exhaust gas conduit to an air intake manifold. The idle exhaust relief valve controls the flow of exhaust gas from the exhaust conduit to a location at atmospheric pressure. In addition, the idle exhaust relief valve is used to allow air to flow from the atmosphere into the exhaust conduit when the engine is turned off.

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patent: 2008/0053419 (2008-03-01), Pierpont
patent: 09109995 (1997-04-01), None

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