Wear a pis­ton skirt for less wear

The Witness - Wheels - - INNOVATION - — Sup­plied.

NUREM­BERG — Fed­eral- Mogul Pow­er­train, a divi­sion of Fed­eral- Mogul Hold­ings Cor­po­ra­tion, has in­tro­duced pis­ton skirt coat­ings that de­liver less fric­tion in both petrol and diesel turbo- charged en­gines.

Build­ing on the proven per­for­mance of pre­vi­ous EcoTough coat­ings, the new for­mu­la­tions fur­ther re­duce en­gine fric­tion, wear and noise, while deal­ing with the chal­leng­ing loads and tem­per­a­tures that ex­ist in the lat­est down­sized, tur­bocharged en­gines. “Re­duc­ing fric­tional losses by ap­ply­ing ma­te­ri­als ex­per­tise is a crit­i­cal el­e­ment of Fed­eral- Mogul Pow­er­train’s work with en­gine man­u­fac­tur­ers,” said Gian Maria Olivetti, chief tech­nol­ogy of­fi­cer, Fed­eral- Mogul Pow­er­train.

“Our new EcoTough pis­ton skirt coat­ings have the in­creased dura­bil­ity nec­es­sary to per­form for the life of the pis­ton un­der the greater ther­mal and me­chan­i­cal loads cre­ated by the lat­est gen­er­a­tion of highly ef­fi­cient en­gines.”

He said petrol and diesel en­gines re­quire al­ter­na­tive so­lu­tions be­cause of im­por­tant dif­fer­ences in their rel­a­tive com­bus­tion loads, pis­ton ge­om­e­try and the lu­bric­ity of their re­spec­tive fu­els. Fed­eral- Mogul Pow­er­train has ac­com­mo­dated these dif­fer­ences by for­mu­lat­ing spe­cific coat­ings, each op­ti­mised for ei­ther petrol or diesel ap­pli­ca­tion.

EcoTough- New Gen­er­a­tion coat­ing is a metal ox­ide- re­in­forced resin with ad­di­tional em­bed­ded solid lu­bri­cant par­ti­cles.

The coat­ing, which is ap­plied in a thick­ness of 15 mi­crons, re­duces skirt wear in gaso­line en­gines by up to 40% com­pared to the mar­ket stan­dard and of­fers sig­nif­i­cantly im­proved fa­tigue strength un­der ex­tremely harsh con­di­tions.

It also de­liv­ers pis­ton fric­tion re­duc­tion gains of up to 15% com­pared to stan­dard coat­ings, di­rectly im­prov­ing the ef­fi­ciency of the base en­gine. The new coat­ings are cur­rently com­plet­ing val­i­da­tion pro­grammes with ve­hi­cle man­u­fac­tur­ers.

Diesel en­gines

EcoTough- D has been de­vel­oped for alu­minium and steel diesel pistons, in pas­sen­ger cars and com­mer­cial ve­hi­cles.

Tak­ing ad­van­tage of the greater struc­tural stiff­ness of diesel pistons and the su­pe­rior lu­bric­ity of diesel fuel, Fed­eral- Mogul Pow­er­train was able to spec­ify a dif­fer­ent for­mu­la­tion and de­liver greater im­prove­ment in fric­tion lev­els. A poly­mer­based coat­ing re­in­forced with short car­bon fi­bres and con­tain­ing graphite em­bed­ded as a solid lu­bri­cant, EcoTough- D re­duces pis­ton fric­tion by as much as 35% com­pared to con­ven­tional coat­ings. Wear re­sis­tance is im­proved by up to 30%. “The pis­ton skirt and pis­ton pin alone ac­count for around 17% of the fric­tional losses,” said Dr Frank T. H. Dör­nen­burg of Fed­eral- Mogul.


A pas­sen­ger car steel pis­ton with the new Fed­eral- Mogul Pow­er­train EcoTough- D skirt coat­ing for diesel ap­pli­ca­tions.

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