| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a positive crankcase ventilation system which unfailingly melts freezing of moisture included in a blow-by gas exhausted from an engine even in a severe cold region and thereby prevents the clogging of a blow-by gas hose at low costs.SOLUTION: A positive crankcase ventilation system of an internal combustion engine 1 includes: a turbocharger 2 which supercharges the internal combustion engine; heating means which branches a coolant R in the internal combustion engine to cool the turbocharger and then heats a blow-by gas by the coolant R returning to a water pump 63; and a blow-by gas hose 3 which introduces the blow-by gas into an intake pipe 24 at the upstream side of the turbocharger. An introduction part 33 where the blow-by gas hose is connected with the intake pipe is heated by the heating means to melt condensed water freezed in the introduction part.</p> |
