Mahle Steel Diesel Pistons

Injection pressures of up to 2 200 bar mean pressures of up to 31 bar peak pressures of up to 210 bar specific power output of up to 100 kw per liter and ever lower exhaust gas emissions these are the current requirements for modern passenger car diesel engines.

Mahle steel diesel pistons.

A new production process from mahle with maximum design freedom for the piston gallery permits the way for the use of steel pistons in powerful passenger car diesel engines. Forged diesel pistons are best suited for dedicated drag and pulling vehicles. Injection pressures of up to 2 200 bar mean pressures of up to 31 bar peak pressures of up to 210 bar specific power output of up to 100 kw per liter and ever lower exhaust gas emissions these are the current requirements for modern passenger car diesel engines. Stuttgart february 04 2019 a new production process from mahle with maximum design freedom for the piston gallery permits the way for the use of steel pistons in powerful passenger car diesel engines.

Mahle motorsports in general will run tighter tolerances than our competition. So eroding isn t an issue with these steel parts. Although the performance forged pistons are stronger the lack of a steel top ring groove in the forging will result in a limited lifecycle for street applications. The powerpak pistons are made from either 4032 aluminum alloy to allow for tighter cylinder to wall clearances and improved temperature stability or 2618 alloy to allow for increased detonation resistance.

Strength and design flexibility still make the performance forged piston a favorite for competition. New development from mahle allows steel pistons to be used in powerful passenger car engines. Since the pistons are of a similar material as the cylinder both have similar growth characteristics. And with good reason.

This advantage makes steel pistons viable even for engines with lower stresses. The special laser welding process used allows for a kidney shaped cross section of the piston gallery. Steel pistons are not only stronger but also consume less fuel than aluminum pistons.