Crankcase ventilation system

Details Crankcase ventilation system Crankcase ventilation system

1997-11-26

2000-07-04

McMahon, Marguerite

Internal-combustion engines

Charge forming device

Crankcase vapor used with combustible mixture

F01M 2126, B63H 2000

Patent

active

060823437

ABSTRACT:
A crankcase ventilation system is provided for an outboard motor having a cowling and a water propulsion device, an internal combustion engine positioned in the cowling and arranged to propel the water propulsion device. The engine having at least one combustion chamber, a crankcase chamber into which blow-by air and fuel from the combustion chamber passes, a lubricating system including an oil filter and an ignition system including an ignition element for initiating combustion in said combustion chamber. The crankcase ventilation system includes an air intake member defining an intake chamber, at least one air intake port providing a source of air for the engine communicating with the intake chamber and an output port in fluid communication with the intake chamber for delivery of the air to the engine from the intake chamber. At least one blow-by port directs blow-by mixture from the crankcase chamber into the intake chamber at a point on the air intake member between the intake port and the output port.

REFERENCES:
patent: 4345573 (1982-08-01), Obata
patent: 4603673 (1986-08-01), Hiraoka et al.
patent: 4712532 (1987-12-01), Ura et al.
patent: 5794602 (1998-08-01), Kimura

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