BLOW-BY DEVICE OF INTERNAL-COMBUSTION ENGINE

摘要

PURPOSE:To prevent freezing of a valve for ventilation of crank case and a blow-by gas passage for the gas by installing at least part of the blow-by gas passage in the neighborhood of the hot-water riser part of the suction pipe. CONSTITUTION:The blow-by line 2 in communication with the upper part of a suction pipe 1 runs through a hot-water riser part 3 to lead to a crank case 6 through a valve (PCV valve) 4 for ventilation of the crank case and a breezer chamber 5. The blow-by line 2 is heated by hot-water at the hot-water riser part 3, so that the line 2 and PCV valve 4 can work without freezing for a long time. The line 2 is located in the neighborhood of exhaust gas feed-back line 7 so as to be heated by the exhaust gas.