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

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

1988-04-11

1989-01-03

Myhre, Charles J.

Internal-combustion engines

Two-cycle

Rear compression

123514, F02B 3304

Patent

active

047948892

ABSTRACT:
A marine fuel injection system for a two cycle crankcase compression internal combustion engine includes a puddled fuel return line (44) between the crankcase (16) and a vapor separator (33). A shut-off valve (50) in the puddled fuel return line (44) is closed at high engine speed to prevent the flow at a high rate of a substantially gaseous medium to the vapor separator, to prevent fuel foaming otherwise caused thereby in the vapor separator and which would pass through the vapor vent line (41) to the induction manifold (17), causing an over-rich condition at high engine speed. At low engine speed, the shut-off valve (50) is open, permitting flow of puddled fuel to the vapor separator, which flow is substantially more liquidic and at a lower rate.

REFERENCES:
patent: 4280465 (1981-07-01), Staerzl
patent: 4290394 (1981-09-01), Frank et al.
patent: 4461260 (1984-07-01), Nonaka et al.
patent: 4590897 (1986-05-01), Hundertmark
patent: 4699109 (1987-10-01), Hensel
patent: 4702202 (1987-10-01), Hensel et al.

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