Internal-combustion engines – Charge forming device – Crankcase vapor used with combustible mixture
Patent
1990-10-19
1991-12-03
Kamen, Noah P.
Internal-combustion engines
Charge forming device
Crankcase vapor used with combustible mixture
123 4186, F02M 2500
Patent
active
050691929
ABSTRACT:
An internal combustion engine having a crankcase ventilation system is shown. The engine comprises a cylinder block and an oil pan which are assembled to define a crankcase. A crankshaft is rotatably held in the crankcase and including a counterweight. The cylinder block is formed with a fresh air inlet passage through which the interior of the crankcase and the outside of the engine are communicated. The fresh air inlet passage has a fresh air inlet opening which is exposed to the interior of the crankcase at a position close to the counterweight so that under rotation of the crankshaft, the opening is periodically covered and opened by the counterweight. A blow-by gas passage is provided through which the interior of the crankcase and the outside of the engine are communicated. The opening of the fresh air inlet passage is covered by the counterweight when the passage in the crankcase becomes relatively high, and opened by the same when the pressure in the crankcase becomes relatively low.
REFERENCES:
patent: 4958613 (1990-09-01), Hiraoka et al.
Aruga Tatsuo
Matsumoto Eiichi
Kamen Noah P.
Nissan Motor Company Ltd.
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