Fuel injection nozzle, particularly for diesel engines

Details Fuel injection nozzle, particularly for diesel engines Fuel injection nozzle, particularly for diesel engines

1982-04-15

1983-11-15

Myracle, Jerry W.

Measuring and testing

Internal combustion engine or related engine system or...

Compression

200 83Q, G01M 1500

Patent

active

044148453

ABSTRACT:
A fuel injection valve with an electrical terminal signalling when the injection opens includes a second switch which is serially connected, electrically, with the needle valve so that the needle valve (15) can break an electrical circuit upon first lifting off the valve seat (16,17), full movement of the needle valve even upon engagement with the housing (10,11,12) still leaving an open circuit condition of an electrical terminal (49), although the needle valve body (15) re-engages the housing, by including a second switch (40,42; 51,52) serially with the switch formed by the valve cone and valve seat (17,16), the second switch including a movable second element (40,51) slidable with respect to a first fixed element (42,52) and moved by a push sleeve (28) or a push rod (70) with a dead or lost motion upon movement of the valve element (15) for a portion (h.sub.2) of its full stroke (h.sub.1) to then engage the movable second contact element and move it off the first contact element, and permit overtravel of the second contact element for the full stroke length (h.sub.1) of the needle element (15), so that the electrical circuit between the needle valve (15) and the external terminal (49) will remain open although the needle valve again contacts the metallic housing (10,11,12) of the valve-nozzle combination.

REFERENCES:
patent: 4181010 (1980-01-01), Knape et al.
patent: 4359895 (1982-11-01), Wolff et al.

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