Patent ID: 9546580
Date: 2017-01-17
CPC Classifications: B01D,F01M,F02B,F02F,F02M

Claim:
1. An internal combustion engine comprising: a crankcase, an oil sump, at least one balancing shaft rotatably mounted in a balancing tunnel formed in the crankcase, wherein the balancing tunnel has a first end portion, a second end portion and a central portion extending between said first and second end portions, and a blow-by gas recirculation system having an inlet channel in communication with the oil sump, an outlet channel in communication with an intake manifold, a centrifugal separator arranged between said inlet channel and said outlet channel, and at least one drainage channel which opens into the oil sump for discharging separated liquid; wherein: said inlet channel of the blow-by gas recirculation system communicates with said first end portion of the balancing tunnel, said centrifugal separator is housed in said second end portion of the balancing tunnel and is driven in rotation by said balancing shaft, said outlet channel of the blow-by gas recirculation system communicates with a gas outlet of said centrifugal separator, whereby, during operation, flow of blow-by gas flows successively through the central portion of the balancing tunnel and the centrifugal separator in a path from the inlet channel to the outlet channel, and said balancing shaft has an eccentric cross section at least at said central portion of the balancing tunnel.