An oil sump, an internal combustion engine, a vehicle and a method are disclosed. The oil sump comprises a container defining a volume for containing oil in which the volume comprises a primary volume for containing an oil outlet, a secondary volume and an intermediate volume. A first wall divides the primary volume from the intermediate volume. The first wall comprises a first restricted flow means configured to enable a restricted flow of oil from the intermediate volume to the primary volume. A second wall comprising a second restricted flow means is arranged to divide the secondary volume from the intermediate volume. A top-up arrangement is configured to direct returned oil to the secondary volume and enable excess returned oil to overflow into the intermediate volume. A first weir means is positioned to enable an overflow of returned oil into the primary volume.

A pan system suitable for an engine housing structure has trough-shaped inner and outer pans with bottoms and upright walls. The inner pan accommodates engine oil. The outer pan bottom and upright walls run at least in certain areas at a distance from the bottom and walls of the inner pan, forming a channel-like intermediate space containing engine for affecting the temperature of the inner pan. Fins are provided on the inner walls and the outer walls. The bottoms of the inner and outer pans interact through a supporting system. Preferably, the inner and outer pans are made of metallic material and the inner pan is provided at least on one inner side of the bottom and upright walls with a cooling fin system that optimizes heat transfer. The upright walls of the inner and outer pans are connected to the engine housing structure.

A lubricant conducting member includes a lubricant conducting housing arranged between a crankcase and a lubricant collecting trough. The lubricant housing is surrounded by a bordering edge, and a projection of the bordering edge delimits an area in a plane parallel to a standing plane of the motor vehicle. A cumulative area of all of the lubricant passage openings is smaller than of the area. In a perpendicular view, from the standing plane of the motor vehicle onto the lubricant conducting housing, in particular the view from below at least one lubricant passage opening, all lubricant passage openings are completely covered by the lubricant recirculation system.

A lubricating device for lubricating an internal combustion engine irrespective of orientation, which device comprises a housing that forms a housing part of the internal combustion engine, is, in order to make it possible to reliably lubricate an internal combustion engine, irrespective of orientation, by means of simple constructive means, designed and developed such that a first working chamber for storing lubricant and a second working chamber that is separate from the first working chamber are arranged in the housing, such that a passage is formed from the first working chamber to the second working chamber, such that the second working chamber comprises an opening to a crankshaft receiving area of the housing, and such that the first working chamber comprises a lubricant channel to the crankshaft receiving area, the opening and the lubricant channel being spaced apart from each other in a height direction such that lubricant can be supplied to the crankshaft receiving area, irrespective of orientation, at least via the opening or the lubricant channel.

An engine oil supply system may include an oil pan connected with an oil pump at a first side and connected with an oil cooler at a second side, an oil passage through which oil pressurized by the oil pump flows, an oil filter disposed in the oil pan to filter impurities in the oil supplied from the oil pump, and a bypass valve disposed in the oil passage to selectively supply the oil in the oil passage to at least one of the oil cooler and the oil filter.

An oil pan includes a pan structure forming a primary reservoir, and defining a PCV passage, and a PCV reservoir. The PCV passage includes an inlet for receiving fluid from a PCV drain of an engine block, and an outlet disposed vertically below the inlet of the PCV passage for discharging the fluid received from the PCV drain. The PCV reservoir includes a lower end disposed adjacent the outlet of the PCV passage, and an upper end disposed vertically above the lower end of the PCV reservoir and in fluid communication with the primary reservoir. The PCV passage and the PCV reservoir define a fluid flow path forming a fluid trap at the intersection of the outlet of the PCV passage and the lower end of the PCV reservoir, to keep the outlet of the PCV passage submerged during dynamic operation of the engine.

A lubrication and hydraulic actuation system for a transfer case (120) includes a pump (220), a pump sump (210) formed in the transfer case (120), and having an opening (430) in communication with an interior of the transfer case (120), and a fluid retention element (510, 710). The fluid retention element (510, 710) is disposed in the opening (430) of the pump sump (210) and has at least one baffle structure (550) to allow fluids to enter the pump sump (210) through the fluid retention element (510, 710) and restrain fluids from exiting the pump sump (210) through the fluid retention element (510, 710).

An oil pan in an engine assembly comprises a housing including a bottom wall and a sidewall and an oil drain tube. The oil drain tube includes a tubing wall and a portion of the sidewall and is integrally formed with the housing.

An oil pan includes a pan structure forming a primary reservoir, and defining a PCV passage, and a PCV reservoir. The PCV passage includes an inlet for receiving fluid from a PCV drain of an engine block, and an outlet disposed vertically below the inlet of the PCV passage for discharging the fluid received from the PCV drain. The PCV reservoir includes a lower end disposed adjacent the outlet of the PCV passage, and an upper end disposed vertically above the lower end of the PCV reservoir and in fluid communication with the primary reservoir. The PCV passage and the PCV reservoir define a fluid flow path forming a fluid trap at the intersection of the outlet of the PCV passage and the lower end of the PCV reservoir, to keep the outlet of the PCV passage submerged during dynamic operation of the engine.

An engine oil supply system may include an oil pan connected with an oil pump at a first side and connected with an oil cooler at a second side, an oil passage through which oil pressurized by the oil pump flows, an oil filter disposed in the oil pan to filter impurities in the oil supplied from the oil pump, and a bypass valve disposed in the oil passage to selectively supply the oil in the oil passage to at least one of the oil cooler and the oil filter.