Patent ID: 7219629

Claim:
A breathing system in a combustion engine having a crankcase, which comprises: an air cleaner including a replaceable cleaner element and operable to purify air to be supplied to the combustion engine as the air flows through the cleaner element, the air cleaner including a cleaner casing having a blow-by gas inlet port and an intake air discharge port both defined therein downstream of the cleaner element; a breather passage having a first breather passage portion and a second breather passage portion; the first breather passage portion having a breather chamber provided in a crank chamber of the crankcase for separating an oil component from a blow-by gas flowing from the crank chamber, and fluidly connecting the blow-by gas inlet port of the cleaner casing and the breather chamber in the crank chamber; the second breather passage portion being formed downstream of the cleaner element inside the cleaner casing to define a curved passage portion that extend between the blow-by gas inlet port and the intake air discharge port to fluidly connect the blow-by gas inlet port and the intake air discharge port, the second breather passage portion also having a drain hole defined therein for draining into the cleaner casing a water component, separated from the blow-by gas flowing through the breather passage.