Federal-mogul Burscheid Gmbh

Federal-mogul Nurnberg Gmbh

Federal-mogul Friedberg Gmbh

Laszlo Pelsoeczy

Richard Mittler

Steffen Hoppe

Hans-Henning Zutz

Rainer Weiss

Klaus Lades

Dirk Bärenreuter

Wojciech Kolodziej

Marck Skowron

Kazimierz Marszalik

Homi D Jijina

Wilfried Langner

Thomas Gerle

Franz-J Goebbeis

Eric Fritsche

Marek Skowron

Hans-Jürgen Veutgen

The invention relates to an MF expander springfor a three-part oil scraper ring. It comprises a steel band, which is corrugated in a trapezoidal or diamond-shaped manner in the axial direction, wherein the MF expansion springhas axial protrusions, which are intended to abut in each case against an upper or lower oil scraper ringfrom the inside in the radial direction, in order to press said axial protrusions outwards against an inner cylinder surface, comprises upper flat sections, which are intended to abut against an upper scraper ringof a three-part oil scraper ringin the axial direction, comprises lower flat sections, which are intended to abut against a lower scraper ringof the three-part oil scraper ringin the axial direction, and comprises flank sections, which extend between the upper flat sectionsand the lower flat sections. At least every second flank sectionforms an acute angle (&#x3b1;) with the associated upper or lower flat sections

Spacer spring for a three-part oil scraper ring and three-part oil scraper ring having said spacer spring

A diesel engine piston is cast in one piece and consists of almost fully pearlitic cast iron with spheroidal graphite as the piston material. Such a piston is used for 'light vehicle' diesel engines, 'heavy duty' diesel engines and &#x201c;large bore&#x201d; diesel engines.

Piston for internal combustion engines, and use of a piston for internal combustion engines

A steel material composition in particular for manufacturing piston rings and cylinder liners, which has a good nitriding capability, contains the following elements in the given proportion related to 100% by weight of the steel material composition: 0.5-1.2% by weight C, 4.0-20.0% by weight Cr, 45.30-91.25% by weight Fe, 0.1-3.0% by weight Mn, 0.1-3.0% by weight Mo, 2.0-12.0% by weight Ni, 2.0-10.0% by weight Si and 0.05-2.0% by weight V. It can be manufactured by manufacturing a melt of the starting materials and casting the melt into a prefabricated mold. Nitridation of the steel material composition which is obtained leads to a nitridized steel material composition which, by virtue of the manufacture with gravity casting, exceeds the properties of tempered cast iron with nodular graphite.

Nitridable piston rings

A piston ring exhibiting particles capable of wear resistance on its shoulder is produced by producing a melt of the base materials of a metal material, adding ceramic particles to the melt, pouring the melt into a prefabricated mold and cooling the melt. During cooling, the mold is aligned such that the ceramic particles gather on at least one of the piston ring shoulders.

Method of producing a piston ring having embedded particles

The invention relates to a steel material composition, in particular for producing piston rings and cylinder sleeves, containing the following elements in the given fractions in relation to 100% by weight of the steel material: 0.03-2.0% by weight B, 0.5-1.2% by weight C, 70.1-97.3% by weight Fe, 0.1-3.0% by weight Mn and 2.0-10.0% by weight Si. Said composition can be produced by melting the starting materials and casting the melt in a pre-fabricated mold.

Steel material composition for producing piston rings and cylinder sleeves

An engine component such as, for example, an engine piston or a part thereof, for instance a ring carrier or piston boss bushing, consisting of a cast iron alloy that contains zirconium as an alloy constituent in an amount by weight of at least 0.01% and up to 0.1%.

Piston for an internal combustion engine comprising a ring carrier being formed of a cast iron alloy

A steel piston ring and a steel cylinder liner are described which comprise as the main body a steel composition which has good nitridability. The steel composition consists of the following elements: 0-0.5 weight % B, 0.5-1.2 weight % C, 4.0-20.0 weight % Cr, 0-2.0 weight % Cu, 45.30-91.25 weight % Fe, 0.1-3.0 weight % Mn, 0.1-3.0 weight % Mo, 0-0.05 weight % Nb, 2.0-12.0 weight % Ni, 0-0.1 weight % P, 0-0.05 weight % Pb, 0-0.05 weight % S, 2.0-10.0 weight % Si, 0-0.05 weight % Sn, 0.05-2.0 weight % V, 0-0.2 weight % Ti and 0-0.5 weight % W. The steel piston ring and the steel cylinder liner can be manufactured in a casting process using the machinery and technology employed for the manufacture of cast iron parts.

Nitratable steel piston rings and steel cylindrical sleeves, and casting method for the production thereof

The invention relates to a steel material composition, in particular for producing piston rings and cylinder sleeves, containing the following elements in the given fractions in relation to 100% by weight of the steel material: 0.5-1.2% by weight C, 6.0-20.0% by weight Cr, 45.0-88.5% by weight Fe, 3.0-15.0% by weight Mn and 2.0-10.0% by weight Si. Said composition can be produced by melting the starting materials and casting the melt in a pre-fabricated mold.

The invention relates to a steel material composition, in particular for producing piston rings and cylinder sleeves, containing the following elements in the given fractions in relation to 100% by weight of the steel material: 0.5-1.2% by weight C, 2.0-20.0% by weight Cr, 49.0-97.1% by weight Fe, 0.1-3.0% by weight Mn, 0.1-3.0% by weight Mo, 0.-7.0% by weight Nb, 2.0-10.0% by weight Si, 0-7.0% by weight Ti, 0.-7.0% by weight V and 0.-0.5% by weight W, the sum of the fractions of Nb, Ti, V and W being 2.0-7.0% by weight. Said composition can be produced by melting the starting materials and casting the melt in a pre-fabricated mold.

Piston rings

A cast iron material, particularly a ledeburitic cast iron material with a carbide content of at least 15 wt. % and a characteristic free, evenly distributed graphite formation is disclosed. In this case, the evenly distributed graphite formation may comprise graphite flakes and/or vermicular graphite and/or nodular graphite. Depending on the respective application (diameter (D) of the running gear seal, peripheral speed), the basic matrix may be realized in pearlitic and/or bainitic and/or martensitic form. Due to the high graphite content, the material has a thermal conductivity that is three to four times greater than that of white cast iron materials, wherein this provides the advantage that no scoring of the running gear seals occurs at high peripheral speeds (&#x3e;5 m/s) and large diametrical dimensions of the seals (D &#x3e;600 mm). In addition, the high carbide content of at least 15 wt. % provides an adequate wear resistance, and other alloying elements such as chromium, vanadium, molybdenum and nickel provide the material with a corresponding corrosion resistance. The aforementioned ledeburitic cast iron material with evenly distributed graphite formation can be used, for example, for the manufacture of axial face seals and cylinder liners.

Ledeburite cast iron with a high carbide content and an evenly distributed graphite embodiment

A steel composition which has good nitridability, in particular for the manufacture of piston rings and cylinder liners, contains the following elements in the following quantities expressed with respect to 100 weight % of the steel composition: 0.5-1.5 weight % Al, 0.5-1.2 weight % C, 68.2-96.9 weight % Fe, 0.1-3.0 weight % Mn and 2.0-10.0 weight % Si. It can be manufactured by producing a melt of starting materials and casting the melt into a prepared mold. Nitriding the steel composition obtained results in a nitrided steel composition produced by gravity casting manufacturing with properties that surpass those of hardened and tempered spheroidal graphite.

Nitratable steel material composition for producing piston rings and cylindrical sleeves

A steel material composition, in particular for producing piston rings and cylinder sleeves, contains the following elements in the cited fractions relative to 100% by weight of the steel material: 0.5-1.2% by weight C, 0-3.0% by weight Cr, 72.0-94.5% by weight Fe, 3.0-15.0% by weight Mn and 2.0-10.0% by weight Si. It can be produced by melting the starting materials and casting the melt into a pre-fabricated mold.

Steel material composition for producing piston rings and cylinder lines

The invention relates to a steel material having a high silicon content, and to a method for the production thereof, the steel material being particularly suitable for piston rings and cylinder sleeves. In addition to iron and production-related impurities, the steel material contains 0.5 to 1.2 wt. % carbon, 3.0 to 15.0 wt. % silicon and 0.5 to 4.5 wt. % nickel. Also, the steel material can contain small amounts of the following elements Mo, Mn, Al, Co Nb, Ti, V, Sn, Mg, B, Te Ta La, Bi, Zr, Sb, Ca, Sr, Cer, rare earth metals and nucleating agents such as NiMg, MiSiMg, FeMg and FeSIMg. due to the high Si content, a degree of saturation higher than 1.0 is attained, with the melting temperature of the steel material corresponding to normal cast iron. The steel material can be produced according to a conventional cast-iron technique and has a high resistance to wear and tear and a high structural strength (minimal distortion).

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Burscheid, Germany

Laszlo Pelsoeczy