Has anyone seen a piston like this?

casper
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San Diego, CA US
2/28/2019 8:25pm Edited Date/Time 3/2/2019 7:57pm
This is out of a diesel engine but I've never seen a gap between the rings and the skirt of a piston. Does this only work in low RPM motors?

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Jbulz
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2/28/2019 8:51pm
It's for high cylinder pressure (turbo or supercharged) engines. This separates the crown load/deformation from the skirt sideload / deformation, and also reduces piston mass.

I'm not a diesel guy, but I've seen pictures of these in highly boosted race engines .
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dirtmike86
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Grand Terrace, CA US
3/1/2019 1:46pm Edited Date/Time 3/1/2019 1:48pm
That is a steel piston. Those have been around for about 20 years. It's designed to be as light as a aluminum piston. And no they are not meant for only low RPM motors.
c0ncEpT
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Harrison Twp., MI US
3/2/2019 7:56pm
Mahle refers to them as a Monotherm piston. Like stated above they are made of steel.

Guys have made over 2,000 hp with them in a Cummins application.

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