EP 0432810 B1 19940119 - Pressure cast light metal piston for internal combustion engines.
Title (en)
Pressure cast light metal piston for internal combustion engines.
Title (de)
Pressgegossener Leichtmetallkolben für Verbrennungskraftmaschinen.
Title (fr)
Piston à métal léger, coulé sur pression, pour un moteur à combustion interne.
Publication
Application
Priority
DE 3937616 A 19891111
Abstract (en)
[origin: JPH03194157A] PURPOSE: To improve durability by forming a piston with high-temperature magnesium alloy, by providing its skirt with a chemically applied or electrodeposited metallic sliding layer which has given thickness and hardness, and by coating the inside surface of the piston with a plastic cracker. CONSTITUTION: A piston 1 is formed with pressure-diecast of magnesium alloy belonging to a material group Mg5Nd, a skirt reinforced by 20 vol.% of aluminum oxide fiber is coated with a chemically applied nickel layer (sliding layer) 3 which has a thickness of about 10-30 μm (preferably 16-24 μm) and a hardness of about 740-850 HV0.01 . The inside surface of the piston 1 is coated with a layer 2 formed with a plastic cracker having a thickness of 15 μm. Particles of chromium oxide or similar ceramic oxide material is buried in the sliding layer 3, and the magnesium alloy 2 contains 2-6% of neodymium.
IPC 1-7
IPC 8 full level
F02F 3/00 (2006.01); B22D 18/00 (2006.01); B22D 19/08 (2006.01); C22C 23/06 (2006.01); C22C 47/00 (2006.01); C22C 49/00 (2006.01); C22C 49/04 (2006.01); C22C 49/06 (2006.01); C23C 30/00 (2006.01); F02B 77/02 (2006.01); F02F 3/10 (2006.01); F02F 7/00 (2006.01); F16J 1/01 (2006.01); F16J 1/02 (2006.01)
CPC (source: EP US)
C22C 23/06 (2013.01 - EP US); C22C 49/04 (2013.01 - EP US); C23C 30/00 (2013.01 - EP US); F02F 3/10 (2013.01 - EP US); F02F 2200/04 (2013.01 - EP US); F05C 2201/021 (2013.01 - EP US); F05C 2201/028 (2013.01 - EP US); F05C 2201/043 (2013.01 - EP US); F05C 2251/042 (2013.01 - EP US); F05C 2253/16 (2013.01 - EP US)
Citation (examination)
- DE 2046862 A1 19720330
- JP H06342338 A 19941213 - SONY CORP
- Firmenschrift "75 Jahre Kolbenschmidt", Seiten 43-51
- Firmenschrift "Mahle KG und Elektron-Co. mbH: leichtere Kolbenwerkstoffe", Seiten 1-23
Designated contracting state (EPC)
DE
DOCDB simple family (publication)
DE 3937616 A1 19910516; DE 59004332 D1 19940303; EP 0432810 A1 19910619; EP 0432810 B1 19940119; JP H03194157 A 19910823; US 5063894 A 19911112
DOCDB simple family (application)
DE 3937616 A 19891111; DE 59004332 T 19900822; EP 90202262 A 19900822; JP 30587490 A 19901109; US 60929490 A 19901105