# US 11,306,632 B2 · Oil decantation system for an internal combustion engine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,306,632 B2 - Document ID: US11306632B2 - Status: Granted - Kind: B2 - Application number: 16/768,496 - Filed: 2018-12-03 - Published: 2020-12-10 - Granted: 2022-04-19 - Earliest claimed: 2017-12-05 - Assignees: Novares France - Applicants: Novares France - Inventors: Christophe Maeseele; Christophe Pech; Jerome Demangeot - Web page: https://patentgrep.com/patent/US11306632B2 ## CPC - F01M 13/04: having means for purifying air before leaving crankcase, e.g. removing oil - B01D 45/04: by utilising inertia (B01D45/12 takes precedence) - B01D 45/08: by impingement against baffle separators - B01D 46/10: Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces - F01M 13/0011: {Breather valves} - F01M 13/021: {of negative pressure} - F01M 13/028: {of positive pressure} - F01M 2013/0044: {with one or more valves} - F01M 2013/026: {with pumps sucking air or blow-by gases from the crankcase} - F01M: LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING - B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28) ## Abstract The invention relates to an oil decantation system (1) comprising: (i) a separator device (6) designed to trap the oil droplets (107) that are present in a flow of a blow-by gas (110); and (ii) a jet pump (5) positioned upstream of the separator device (6) and designed to accelerate and draw the flow of the blow-by gas (110) before it enters said separator device (6). ## Claims ### Claim 1 An oil decantation system for an internal combustion engine comprising: a separator device configured to trap oil droplets that are present in a flow of a blow-by gas; and a jet pump positioned upstream of the separator device configured to accelerate the flow of the blow-by gas before it enters said separator device, wherein the jet pump comprises: a tubular body a first end of which comprises a fitting for connection to a source of propellant gas and a second end of which comprises a nozzle; and a conduit disposed opposite the separator device, the nozzle opening into the conduit. ### Claim 2 (depends on 1) The decantation system according to claim 1, wherein the decantation system further comprises a secondary passage closed by a movable flap, disposed in parallel with the jet pump allowing increasing a passage area of the flow of the blow-by gas. ### Claim 3 (depends on 1) The decantation system according to claim 1, wherein the jet pump comprises a check valve. ### Claim 4 (depends on 2) The decantation system according to claim 2, wherein the decantation system comprises an aperture sealed by a movable flap, the aperture delimiting the secondary passage towards the separator device. ### Claim 5 (depends on 1) The decantation system according to claim 1, wherein the decantation system comprises a wall, an upstream face of the wall physically receives the conduit and a downstream face of the wall physically receives the separator device, the conduit and the separator device being in communication by an opening formed in the wall. ### Claim 6 (depends on 5) The decantation system according to claim 5, wherein the conduit is integrally molded with the wall. ### Claim 7 (depends on 1) The decantation system according to claim 1, wherein the decantation system comprises a wall, an upstream face of the wall physically receives the conduit and a downstream face of the wall physically receives the separator device, the conduit and the separator device being in communication by an opening formed in the wall, and wherein the opening has a semi-circular upper area and a trapezoidal lower area, the semi-circular upper area facing the conduit whereas the trapezoidal lower area faces the opening. ### Claim 8 (depends on 4) The decantation system according to claim 4, wherein the decantation system comprises a wall, an upstream face of the wall physically receives the conduit and a downstream face of the wall physically receives the separator device, the conduit and the separator device being in communication by an opening formed in the wall, and wherein the decantation system comprises a wall of material which extends between an external face of the conduit and the wall in which is formed the aperture forming the secondary passage. ### Claim 9 (depends on 2) The decantation system according to claim 2, wherein the movable flap is held in a closed position by gravity. ### Claim 10 (depends on 1) The decantation system according to claim 1, wherein the separator device comprises a valve provided with decantation means separating the droplets and a clean gas. ### Claim 11 (depends on 1) An internal combustion engine comprising a decantation system according to claim 1. ### Claim 12 (depends on 2) The decantation system according to claim 2, wherein the jet pump comprises a check valve. ### Claim 13 (depends on 1) The decantation system according to claim 1, wherein the decantation system comprises an aperture sealed by a movable flap, the aperture delimiting a secondary passage towards the separator device. ### Claim 14 (depends on 3) The decantation system according to claim 3, wherein the decantation system comprises an aperture sealed by a movable flap, the aperture delimiting a secondary passage towards the separator device. ### Claim 15 (depends on 2) The decantation system according to claim 2, wherein the decantation system comprises an aperture sealed by a movable flap, the aperture delimiting the secondary passage towards the separator device. ### Claim 16 (depends on 12) The decantation system according to claim 12, wherein the decantation system comprises an aperture sealed by a movable flap, the aperture delimiting the secondary passage towards the separator device. ### Claim 17 (depends on 16) The decantation system according to claim 16, wherein the decantation system comprises a wall, an upstream face of the wall physically receives the conduit and a downstream face of the wall physically receives the separator device, the conduit and the separator device being in communication by an opening formed in the wall. ### Claim 18 (depends on 17) The decantation system according to claim 17, wherein the conduit is integrally molded with the wall.