Patent · US Active

Steel piston for an internal combustion engine and method for its production

US9581104B2 · kind B2 · utility

1Cited by

6References

18Claims

0Family size

Assignees

Mahle International GmbH · DE
Oerlikon Surface Solutions AG, Pfäffikon · CH

Inventors

Monika Lehnert · Waiblingen, DE
Reinhard Rose · Fellbach, DE
Juergen Ramm · Sevelen, CH
Beno Widrig · Bad Ragaz, CH

Key dates

Filing date	Oct 16, 2014
Grant date	Feb 28, 2017
Priority date	—
Expiry date	Jan 24, 2035

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T29/49249
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

A steel piston for an internal combustion engine may include a piston crown and a protective layer disposed on the piston crown. The protective layer may include an adhesion layer of Cr or CrN, which is present on a surface of the piston crown. The protective layer may include a functional layer, which is present on the adhesion layer. The functional layer may have at least one of (i) at least one layer (A) of CrN and (ii) at least one layer (B) of CrOn in the form of [(A)/(B)]a, and a may represent 1 to 100.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.