MAGNETVENTIL, INSBESONDERE FUER KRAFTSTOFFEINSPRITZPUMPEN

摘要

PCT No. PCT/DE89/00697 Sec. 371 Date May 14, 1991 Sec. 102(e) Date May 14, 1991 PCT Filed Nov. 3, 1989 PCT Pub. No. WO90/05845 PCT Pub. Date May 31, 1990.In a solenoid valve, in particular for fuel-injection pumps, the end position of the valve needle (20) is detected when the valve seating (14) is fully opened by a position signalling device (46), which has a piezoelectric ceramic disk (47) arranged on the stroke-limit stop (28) for the valve needle (20). To transmit the valve-opening signal produced by the piezoelectric ceramic disk (47) when the valve needle (20) strikes the control element (40) of the solenoid valve, a double-conductor connecting cable (34), which is required for the excitation of the electromagnet (25) of the solenoid valve, is used. For this purpose, the circuit element (44) in the control element (40), which causes the electromagnet to be triggered, is connected downstream in the current direction, from the magnetic coil (24) via its feedback line (49) of the connecting cable (34), and the piezoelectric ceramic disk (47) is connected in parallel via the electrical outputs (51,52) of the series connection consisting of a diode ( 50) and of the magnetic coil (24).