Mahle International Gmbh

Timo Linke

Rainer Scharp

Sascha-Oliver Boczek

An assembly for cooling oil for an internal combustion engine may include a piston having a piston head and a piston skirt. The piston head may include a piston crown with an undersurface having an outer region configured as a guiding surface for the cooling oil, a circumferential ring part, and, in a region of the circumferential ring part, a circumferential cooling channel with at least one feed opening for the cooling oil. The assembly may also include a first oil spray nozzle for creating a first cooling oil jet directed at the feed opening, and a second oil spray nozzle for creating a second cooling oil jet directed at the guiding surface such that the second cooling oil jet may deflect and flow along the guiding surface in a direction of the undersurface. At least the first oil spray nozzle may be positioned below the piston skirt.

Assembly of a piston and an oil spray nozzle for an internal combustion engine

A cooling channel cover for a piston of an internal combustion engine may include a body having mutually opposite end faces. At least one supply element for a coolant may be received in an opening disposed in the cooling channel cover. The supply element may include an inlet region and an outlet region, and may be held on the cooling channel cover via a clipped-in latching connection. A spring tab may be disposed on the inlet region of the supply element, and/or a latching element may be disposed on the outlet region of the supply element. The spring clip may engage one of the end faces and the latching element may engage the opposite end face.

Cooling channel cover and piston provided with a cooling channel cover

An annular cooling channel cover for a piston may include an elastic material body having opposing end faces. At least two opposing end regions may provide a joint gap and at least one feed element for a coolant may be received in at least one opening disposed in the cooling channel cover. The feed element may include an inlet region and an outlet region, and may be held on the cooling channel cover via a clip-on latching connection. Spring clips may be disposed on the inlet region of the feed element, and/or latching elements may be disposed on the outlet region of the feed element. The spring clips may engage one of the end faces and the latching elements may engage the opposing end face. A closure element may engage into the joint gap to close the same.

The present invention relates to a piston () for an internal combustion engine, which has a piston skirt () as well as a piston head () having a circumferential ring belt () and having a circumferential cooling channel () closed off with a closure element (), wherein a circumferential recess () is formed between the piston head () and the piston skirt (). According to the invention, it is provided that the closure element () consists of at least two subcomponents (), that each subcomponent () has a radially oriented base plate () and at least one circumferential collar () oriented axially on the outer edge () of the base plate (), which collar is accommodated in at least one outer fold () that runs underneath the ring belt ().

Piston for an internal combustion engine

The invention relates to a piston () for an internal combustion engine. Said piston comprises a piston head (), a piston skirt () and a peripheral recess () between the piston head () and the piston skirt (), an annular peripheral cooling channel (), which is open towards the bottom and which is closed by a closing element (), being provided in the piston head (), and the piston skirt () having fillets () which are connected to the bottom of the piston skirt () and interconnected via bearing surfaces (). According to the invention, at least one projection () is formed in the region of a free end face () of the bearing surfaces () and extends radially into a region of the cooling channel (), said projection matching an opening () in the closing element () of the cooling channel ().

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Stuttgart, Germany

Timo Linke