Fuel puddle bleed shut-off for fuel injected two cycle engine

Patent · Tue Jan 03 04:00:00 EST 1989

OSTI ID:6155533

Hensel, R J

This patent describes a marine fuel system for a two cycle crankcase compression internal combustion engine having a piston reciprocal in a cylinder between a combustion chamber and a crankcase. An induction system supplies combustion air to the engine and fuel injection means mixes fuel with the combustion air. Having a fuel tank, the fuel system fuel pump means connected to draw fuel from the fuel tank and supply fuel under pressure to the fuel injection means, pressure regulator means regulating the output pressure of the fuel pump means at the fuel injection means and returning excess fuel through an excess fuel return line to the fuel pump means for recirculation, and a puddle removal system comprising a puddled fuel return line having an inlet connected to the crankcase and receiving puddled fuel including heavy fuel ends. An outlet is connected to return puddled fuel to the fuel pump means for recirculation, wherein substantially all of the fluid flow in the puddled fuel return line from the crankcase is gaseous at high engine speed, and is more liquidic at low engine speed, a shut-off valve in the puddled fuel return line and having a closed condition at the high engine speed blocking the gaseous flow from the crankcase through the puddled fuel return line, and having an open condition at the low engine speed permitting fluid flow from the crankcase through the puddled fuel return line.

• Assignee: Brunswick Corp., Skokie, IL
• Patent Number(s): US 4794889
• OSTI ID: 6155533
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
COMBUSTION CHAMBERS
CONTAINERS
CONTROL
CONTROL EQUIPMENT
CYLINDERS
ENGINES
EQUIPMENT
FLOW REGULATORS
FUEL INJECTION SYSTEMS
FUEL SYSTEMS
FUEL-AIR RATIO
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
OPERATION
PISTONS
PRESSURE CONTROL
PUMPS
TANKS
VALVES