US 11,739,669 B2
Blow-by gas treating device and engine including blow-by gas treating device
Masayasu Takami, Sakai (JP); Katsunori Ikemachi, Sakai (JP); Yuki Yoshita, Sakai (JP); Masayuki Tochimoto, Sakai (JP); Kazuya Ishida, Sakai (JP); Tomohiro Suzuki, Sakai (JP); Yu Suzuki, Sakai (JP); Toru Suzuki, Sakai (JP); and Kentaro Kita, Sakai (JP)
Assigned to KUBOTA CORPORATION, Osaka (JP)
Appl. No. 17/786,494
Filed by KUBOTA CORPORATION, Osaka (JP)
PCT Filed Mar. 9, 2021, PCT No. PCT/JP2021/009371
§ 371(c)(1), (2) Date Jun. 16, 2022,
PCT Pub. No. WO2021/187250, PCT Pub. Date Sep. 23, 2021.
Claims priority of application No. 2020-045720 (JP), filed on Mar. 16, 2020; application No. 2020-135354 (JP), filed on Aug. 7, 2020; application No. 2020-135355 (JP), filed on Aug. 7, 2020; and application No. 2020-138129 (JP), filed on Aug. 18, 2020.
Prior Publication US 2022/0403764 A1, Dec. 22, 2022
Int. Cl. F01M 13/04 (2006.01); F01M 11/00 (2006.01)
CPC F01M 13/04 (2013.01) [F01M 11/0004 (2013.01); F01M 2011/0033 (2013.01); F01M 2013/0438 (2013.01)] 18 Claims
OG exemplary drawing
 
1. 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 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.