Exhaust heated crankcase for 2-cycle marine engine

Details Exhaust heated crankcase for 2-cycle marine engine Exhaust heated crankcase for 2-cycle marine engine

1988-02-19

1989-06-06

Okonsky, David A.

Internal-combustion engines

Two-cycle

Whirl through piston-controlled ports

123 73SC, 60272, 440900, F02B 7502

Patent

active

048361526

ABSTRACT:
The idle exhaust pressure relief system in an outboard motor is utilized to simultaneously heat the engine crankcase or other parts of the fuel supply system to prevent the puddling of fuel typically occurring at lower engine temperatures. Because the idle exhaust pressure relief system is inherently operable to conduct hot exhaust gases out of the exhaust manifold only at idle or low speed operation, heat is supplied to the crankcase only at temperatures when fuel puddling typically occurs.

REFERENCES:
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patent: 3772887 (1973-11-01), Ziegler
patent: 3800753 (1974-04-01), Sullivan et al.
patent: 3805751 (1974-04-01), Resnick et al.
patent: 3967446 (1976-07-01), Harralson et al.
patent: 4082068 (1978-04-01), Hale
patent: 4534333 (1985-08-01), Slattery
patent: 4590897 (1986-05-01), Hundertmark
patent: 4668199 (1987-05-01), Freund et al.
patent: 4735046 (1988-04-01), Iwai

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