Systems and devices are disclosed for controlling fluid flow to piston cooling nozzles with a fluid flow control device configured to open when an internal combustion engine requires piston cooling at high speed but remains open for a period of time after the engine speed drops below a threshold to prevent heat soak damage to the pistons.

A diagnostic method for an oil piston cooling jet valve of an oil pressure system of an internal combustion engine of a motor vehicle, including: Driving the OPCJ valve for detecting oil pressure diagnostic data if multiple enabling conditions have been met, the multiple enabling conditions including: Presence of a stationary operation of the internal combustion engine; presence of a predetermined operating range; presence of an oil temperature within a predetermined oil temperature range; prevention of a scheduled driving of the OPCJ valve for regular piston cooling; and prevention of an error of the oil pressure system. The diagnostic method further including: Determining whether an oil pressure measuring point is within a predefined oil pressure measuring point range. The invention further relates to a diagnostic device, a control unit and a motor vehicle, which are each suitable or configured for carrying out the method.

A diagnostic method for an oil piston cooling jet valve of an oil pressure system of an internal combustion engine of a motor vehicle, including: Driving the OPCJ valve for detecting oil pressure diagnostic data if multiple enabling conditions have been met, the multiple enabling conditions including: Presence of a stationary operation of the internal combustion engine; presence of a predetermined operating range; presence of an oil temperature within a predetermined oil temperature range; prevention of a scheduled driving of the OPCJ valve for regular piston cooling; and prevention of an error of the oil pressure system. The diagnostic method further including: Determining whether an oil pressure measuring point is within a predefined oil pressure measuring point range. The invention further relates to a diagnostic device, a control unit and a motor vehicle, which are each suitable or configured for carrying out the method.

An electrostatic oil ring (130, 150) has an annular ring body (142, 152) with a surface (132, 134, 136, 138, 154), wherein a portion of the surface (132, 134, 136, 138, 154) carries an electrostatic coating (140, 156) which electrostatically attracts lubricant (35a) in a lubricant reservoir (35) when the electrostatic oil ring (130, 150) passes through the lubricant reservoir (35). Further, an electrostatic oil ring assembly with a plurality of electrostatic oil rings (130, 150), and a dynamoelectric machine with an electrostatic oil ring assembly are provided.

An electrostatic oil ring (130, 150) has an annular ring body (142, 152) with a surface (132, 134, 136, 138, 154), wherein a portion of the surface (132, 134, 136, 138, 154) carries an electrostatic coating (140, 156) which electrostatically attracts lubricant (35a) in a lubricant reservoir (35) when the electrostatic oil ring (130, 150) passes through the lubricant reservoir (35). Further, an electrostatic oil ring assembly with a plurality of electrostatic oil rings (130, 150), and a dynamoelectric machine with an electrostatic oil ring assembly are provided.

A tank device of an oil circuit of an aircraft engine for stocking oil inside an interior space that is delimited by a wall, having at least one appliance for introducing oil into the interior space. By means of the appliance for introducing oil, the area of the wall that is arranged above a minimal filling level, as it occurs during operation of an aircraft engine, can be impinged with oil.

A tank device of an oil circuit of an aircraft engine for stocking oil inside an interior space that is delimited by a wall, having at least one appliance for introducing oil into the interior space. By means of the appliance for introducing oil, the area of the wall that is arranged above a minimal filling level, as it occurs during operation of an aircraft engine, can be impinged with oil.

An oil distribution system for a casing having at least one component to be supplied with oil in the interior of the casing, where the oil can be fed into the interior of the casing by at least one distribution device and where during operation the oil is conveyed by a centrifugal force to the at least one component, including at least one seal, in particular a contact seal or labyrinth seal for sealing off the casing from the environment, with the at least one seal being designed and/or arranged in the oil distribution system such that during operation it releases, due to the centrifugal force, at least one sealing gap for pressure equalization to provide a connection between the interior of the casing and the environment. Furthermore, the invention relates to an aircraft engine.

An injection nozzle for use in injecting lubricating oil into cylinders in large engines is provided. The nozzle is adapted for fastening in a cylinder wall with a nozzle rod extending through the cylinder wall and with a nozzle outlet at the inner end of the nozzle rod. The nozzle rod includes a cylindrical valve seat boring with a displaceable valve body having a cylindrical sealing face which interacts with the cylindrical valve seat boring of the nozzle rod, the valve body biased by a spring for effective closing of the valve. The valve body is formed by a cylindrical rod having a turned recess in the cylindrical sealing face of the valve body. The turned recess is arranged at the inner end of the valve body with parts of the cylindrical sealing face of the valve body at each side of the turned recess.

An injection nozzle for use in injecting lubricating oil into cylinders in large engines is provided. The nozzle is adapted for fastening in a cylinder wall with a nozzle rod extending through the cylinder wall and with a nozzle outlet at the inner end of the nozzle rod. The nozzle rod includes a cylindrical valve seat boring with a displaceable valve body having a cylindrical sealing face which interacts with the cylindrical valve seat boring of the nozzle rod, the valve body biased by a spring for effective closing of the valve. The valve body is formed by a cylindrical rod having a turned recess in the cylindrical sealing face of the valve body. The turned recess is arranged at the inner end of the valve body with parts of the cylindrical sealing face of the valve body at each side of the turned recess.