Method and apparatus for electrochemical machining of spray hole

Details Method and apparatus for electrochemical machining of spray hole Method and apparatus for electrochemical machining of spray hole

1990-03-06

1991-06-25

Valentine, Donald R.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

2041297, 20412975, 204224M, B23H 308, B23H 310, B23H 914, B23H 902

Patent

active

050264621

ABSTRACT:
The inner end of a spray hole in a fuel injection nozzle for an internal injection engine is electrochemically machined by providing a negative electrode inside a chamber in said body, while applying an electrolyte under pressure to the exterior of the nozzle body, so as to cause the electrolyte to flow through the spray hole inwardly of said body. The electrolyte is preferably an aqueous solution of NaCl.

REFERENCES:
patent: 3551310 (1970-12-01), Inoue
patent: 3788964 (1974-01-01), Kurz et al.
patent: 4482445 (1984-11-01), Fjelstad
patent: 4522692 (1985-06-01), Joslin
patent: 4578164 (1986-03-01), Matsui et al.
patent: 4601803 (1986-07-01), Gregory

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