Outboard motor

Details Outboard motor Outboard motor

2007-06-12

2007-06-12

Cronin, Stephen K. (Department: 3747)

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

Reexamination Certificate

active

11108029

ABSTRACT:
An outboard motor has an air intake manifold with a plurality of intake runners and a surge tank. The runners extend from combustion chambers of an internal combustion engine to the surge tank. The air intake manifold is positioned next to one side of the internal combustion engine. An idle regulating valve supplies secondary air from the atmosphere to the air intake manifold. Secondary air flows into the idle regulating valve through an air intake port. The secondary air flows out of an air supply port of the idle regulating valve into the surge tank. The idle regulating valve is located in a space between the internal combustion engine and the air intake manifold, The air supply port of the idle regulating valve opens directly into the surge tank.

REFERENCES:
patent: 6446599 (2002-09-01), Nakayasu
patent: 6499473 (2002-12-01), Itoh
patent: HEI 2001-152895 (2001-06-01), None

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