Global Patent Index - EP 1163438 A1

EP 1163438 A1 2001-12-19 - METHOD FOR MANUFACTURING INTERNAL COMBUSTION ENGINE PISTONS

Title (en)

METHOD FOR MANUFACTURING INTERNAL COMBUSTION ENGINE PISTONS

Title (de)

VERFAHREN ZUR HERSTELLUNG VON BRENNKRAFTMASCHINENKOLBEN

Title (fr)

PROCEDE DE FABRICATION DE PISTONS DE MOTEUR A COMBUSTION INTERNE

Publication

EP 1163438 A1 (EN)

Application

EP 00913863 A

Priority

  • RU 99105048 A
  • US 0006238 W

Abstract (en)

[origin: WO0053914A1] A piston production method produces an internal combustion engine piston. The method comprises forging a billet from an initial billet comprising an aluminum alloy that comprises silicon, intermetallic particles, and injected hardening particles, the forging is conducted under at least one of super-plasticity and hot deformation conditions; and heat treating the forged billet. The forging comprises forging at a temperature in a range from about 0.8 Tmelt to about 0.98 Tmelt. The forging also comprises forging at a STRAIN rate in a range from about 5x10<-2> s<-1> to about 5x10<-5> s<-1>. The piston being formed with a configuration that enables other parts to be connected to the piston. The initial billet comprises at least one of: coarse grain silicon, intermetallic particles, and injected hardening particles having at least one of a lamellar, comprehensive shape, and fine grain silicon, intermetallic particles, and injected hardening particles being globular in shape. The silicon, intermetallic and injected hardening particle volume content is in a range from about 25 % to about 60 %, and an average grain size of the silicon, intermetallic, and injected hardening particles is less than about 15 mu m<2>.

IPC 1-7 (main, further and additional classification)

F02F 3/00; B21C 23/18; B21K 1/18; F02F 7/00

IPC 8 full level (invention and additional information)

B21C 23/18 (2006.01); B21J 5/02 (2006.01); B21K 1/18 (2006.01); C22F 1/04 (2006.01); F02F 3/00 (2006.01); F02F 7/00 (2006.01); F16J 1/01 (2006.01)

CPC (invention and additional information)

B21J 5/02 (2013.01); B21C 23/186 (2013.01); B21K 1/18 (2013.01); F02F 3/00 (2013.01); F02F 7/0087 (2013.01); F02F 2200/04 (2013.01); F05C 2201/021 (2013.01); F05C 2201/0448 (2013.01)

Citation (search report)

See references of WO 0053914A1

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

WO 0053914 A1 20000914; CA 2365335 A1 20000914; EP 1163438 A1 20011219; IL 145203 D0 20020630; JP 2002539357 A 20021119; RU 2176943 C2 20011220

INPADOC legal status


2002-01-02 [18W] APPLICATION WITHDRAWN

- Date of withdrawal: 20011105

2001-12-19 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20011012

2001-12-19 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE