Blow-by gas treating device and engine including blow-by gas treating device

An engine comprising a blow-by gas treating device for treating a blow-by gas generated in the engine, wherein the blow-by gas treating device has:

• a main structure portion which is provided in a head cover of the engine, takes in and guides the blow-by gas, and separates from the blow-by gas an oil contained in the blow-by gas;
• and an outlet portion which supplies the gas, which is a gas after the oil has been separated from the blow-by gas by the main structure portion and has been guided from the main structure portion, to an intake system of the engine, wherein the main structure portion has:
• a first blow-by gas taking-in portion provided on a front side of the engine and taking in the blow-by gas;
• a second blow-by gas taking-in portion provided on a rear side of the engine and taking in the blow-by gas;
• a separating portion provided between the first blow-by gas taking-in portion and the second blow-by gas taking-in portion in a front-back direction of the engine and separating the blow-by gas, having been taken in by the first blow-by gas taking-in portion and the second blow-by gas taking-in portion, into the oil and the gas;
• a first oil guiding portion which is provided from the separating portion toward the front side and guides the oil, having been separated from the blow-by gas by the separating portion, to the front side;
• a second oil guiding portion which is provided from the separating portion toward the rear side and guiding the oil, having been separated from the blow-by gas by the separating portion, to the rear side;
• a first oil drain which is provided on the front side, temporarily stores the oil having been guided by the first oil guiding portion and discharges the oil into the engine;
• a second oil drain which is provided on the rear side, temporarily stories the oil having been guided by the second oil guiding portion and discharges the oil into the engine;
• wherein the outlet portion has an oil guiding surface for guiding the oil remaining in the gas after having been separated from the blow-by gas into the head cover, wherein the separating portion has:
• a flow-velocity rise operating portion which raises a flow velocity of the blow-by gas along a vertical direction;
• a filter through which the blow-by gas, the flow velocity of which has been raised by the flow-velocity rise operating portion, is passed;
• and an impact plate which extends in a horizontal direction and causes the blow-by gas having passed the filter to be collided and separated into the oil and the gas.

A blow-by gas treating device for treating a blow-by gas generated in an engine, the device comprising:

• a main structure portion which is provided in a head cover of the engine, takes in and guides the blow-by gas, and separates from the blow-by gas an oil contained in the blow-by gas;
• and an outlet portion which supplies the gas, which is a gas after the oil has been separated from the blow-by gas by the main structure portion and has been guided from the main structure portion, to an intake system of the engine, wherein the main structure portion has:
• a first blow-by gas taking-in portion provided on a front side of the engine and taking in the blow-by gas;
• a second blow-by gas taking-in portion provided on a rear side of the engine and taking in the blow-by gas;
• a separating portion provided between the first blow-by gas taking-in portion and the second blow-by gas taking-in portion in a front-back direction of the engine and separating the blow-by gas, having been taken in by the first blow-by gas taking-in portion and the second blow-by gas taking-in portion, into the oil and the gas;
• a first oil guiding portion which is provided from the separating portion toward the front side and guides the oil, having been separated from the blow-by gas by the separating portion, to the front side;
• a second oil guiding portion which is provided from the separating portion toward the rear side and guiding the oil, having been separated from the blow-by gas by the separating portion, to the rear side;
• a first oil drain which is provided on the front side, temporarily stores the oil having been guided by the first oil guiding portion and discharges the oil into the engine;
• a second oil drain which is provided on the rear side, temporarily stories the oil having been guided by the second oil guiding portion and discharges the oil into the engine;
• wherein, the outlet portion has:
• an outlet mounting portion having a through hole which is provided on an upper part of the head cover and through which the gas is passed;
• and a container body which is mounted on the outlet mounting portion and temporarily stores the gas having passed through the through hole and supplies the gas to the intake system, wherein the oil guiding surface is an oil-guiding inclined surface inclined downward toward the through hole from a mating surface between the outlet mounting portion and the container body.