Piston

Details Piston Piston

1982-04-07

1984-11-20

Feinberg, Craig R.

Internal-combustion engines

Particular piston and enclosing cylinder construction

Cylinder detail

291565R, 123668, F02B 7508, B23P 1510

Patent

active

044832869

ABSTRACT:
For a piston consisting of an Al-Si alloy having a mean linear grain diameter of the Silicon eutectic of more than 3 .mu.m for combustion engines and provided with a hard-oxidized top, the structure of the base material to be oxidized is subjected to a grain refinement in the depth to be oxidized so that the silicon eutectic has a mean linear grain diameter of less than 3 .mu.m, preferably less than 2.5 .mu.m. By this means, the resistance to erosion of the hard-oxide layer is improved. The grain refinement may be effected in the respective zones during the casting of the piston or thereafter by re-melting those zones prior to oxidizing. If the risk of erosion exists only in specific locally limited zones of a relatively large hard-oxide surface, then a grain refinement confined to these zones is sufficient.

REFERENCES:
patent: 607317 (1898-07-01), Woodworth
patent: 3082752 (1963-03-01), Thomas
patent: 3807014 (1974-04-01), Hummer
patent: 4345138 (1982-08-01), Zammert
patent: 4401726 (1983-08-01), Gnanamuthu

Affiliated with

Also associated with

Rating

Piston does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Piston, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Piston will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2184619