Disclosed is lubrication for a slow-running two-stroke engine, especially marine diesel engines. The lubrication uses Swirl Injection Principle by locating the lubricant injectors closer to the TDC than of the full stroke of the piston, which is closer than in typical marine diesel engines. This can be achieved by reconstructing cylinder liners or by adding new mounting holes to the cylinder. In case that such reconstruction is not possible, an improvement of SIP principles can also be achieved by directing the spray towards the TDC or to a location on the cylinder liner closer to the TDC as compared to the location of the SIP valves, for example under an angle of more than 30 degrees or even more than 60 degrees when measured from a plane normal to the cylinder axis.

An outboard motor comprises an engine block having vertically-aligned first and second banks of cylinders that extend from each other in a V-shape, a vertically-extending central drain passage located below the first bank of cylinders and being configured to drain lubricant to an underlying sump, a vertically-extending crankshaft, and a central deflector located between the first and second banks of cylinders. The central deflector extends from the engine block towards the crankshaft and being configured to deflect lubricant away from the crankshaft to the central drain passage.

Methods and systems are provided for a multi-layered steel gasket for an internal combustion engine. In one example, a system may include a pressure relief device arranged in the multi-layered steel gasket for releasing pressure from one or more fluids flowing through passages of the internal combustion engine.

There is provided an internal combustion engine in which oil can be kept in an oil passageway when oil is supplied, so that the time required to supply oil can be reduced. In an internal combustion engine in which an oil supply inlet for replenishing, with oil, an oil pan reservoir chamber disposed in a lower portion of a crankcase extends obliquely downwardly from an oil supply port at an upper end thereof, the oil pan reservoir chamber has an oil pan inlet port disposed in a position offset from a vertical plane, including the oblique oil supply inlet, and a horizontal oil supply passageway bent and extending substantially horizontally from a lower end of the oil supply inlet is connected to the oil pan inlet port.

An oil supply device includes: an oil pump; an oil supply flow passage through which oil discharged from the oil pump flows; and an air mixing portion that cools a cooling object by mixing air into the oil supplied to the oil supply flow passage and supplying the oil mixed with the air to the cooling object.

An internal combustion engine includes an engine block including a plurality of cylinders. A cylinder head is mounted to the engine block and includes intake and exhaust passages in communication with the plurality of cylinders. A cylinder head cover is mounted to the cylinder head and defines a cavity between the cylinder head and the cylinder head cover. An oil passage is disposed in the cavity and includes at least one oil jet for spraying oil at a surface of the cylinder head that is heated by the exhaust passages.

A piston cooling apparatus for a vehicle, includes: a first gallery that is formed at one side of a cylinder block in a length direction, and receives an oil from an oil pump; a second gallery that is formed at the other side of the cylinder block in a length direction, and supplies the oil into piston cooling jets; and a solenoid valve that is disposed at one side of a hydraulic line of the second gallery. In particular, the solenoid valve bypasses the oil supplied from the first gallery and selectively supplies the oil to the second gallery.

An in-vehicle internal combustion engine includes a cylinder block and a cylinder head. The cylinder head includes a plurality of communication passages connected to the oil chamber. The cylinder block includes an oil passage for returning oil accumulated in the oil chamber into the oil pan. The communication passages include a first communication passage having a first opening opened in the upper surface of the cylinder head and a second communication passage having a second opening opened in the upper surface of the cylinder head. The first opening is located below the second opening. An extending wall extending in a direction intersecting the cylinder arrangement direction is provided between the first opening and the second opening on the upper surface of the cylinder head.

Disclosed is a lubricating apparatus including an oil supply pipe connected to a gearbox of a gearing device for transmitting turning force of a blowdown turbine in the turbo compound system to a crankshaft to supply oil into the gearbox, a first oil supply opening formed to be transpierced at the bearing housing of a first bearing rotatably supporting a shaft of an output gear for outputting turning force in the turbo compound system to supply oil supplied from the gearbox to the first bearing, a sub-supply pipe connected to a gear case in which the output gear is embedded to supply oil to the gear case, and a second oil supply opening formed to be transpierced at the bearing housing of a second bearing rotatably supporting the shaft of the output gear to supply oil supplied through the sub-supply pipe to the second bearing.

A lubrication system for a machine includes a sump to collect a bulk portion of a fluid lubricant and a pump adapted to circulate the lubricant from the sump through a lubricant line to a lubrication target area of the machine. The lubrication system also includes a dip stick defining a first end outside of the machine, a second end immersed in the bulk portion of lubricant, and a lubricant level indicator between the first end and the second end. The lubrication system further includes an additive fixture coupled to the second end of the dip stick. The additive fixture includes at least one additive material section adapted to dissolve in the lubricant to distribute an additive chemical in lubricant circulating through the machine.