Apparatus for controlling the de-excitation time of electromagne

Details Apparatus for controlling the de-excitation time of electromagne Apparatus for controlling the de-excitation time of electromagne

1980-02-19

1982-05-04

Lall, P. S.

Internal-combustion engines

Charge forming device

Fuel injection system

361159, F02D 500

Patent

active

043276920

ABSTRACT:
An apparatus is proposed for controlling the de-excitation time of electromagnetic devices, in particular electromagnetic injection valves in internal combustion engines, wherein a switch (or an actuation circuit in general) is disposed in series with the device, characterized in that a circuit arrangement with a controllable output potential is disposed in series or in parallel with the electromagnetic device. It is the purpose of the apparatus to linearize the current decrease through the electromagnetic device after the end of the actuation pulse and preferably to simultaneously control its rate of decrease. As a result, control of the de-excitation time of the particular electromagnetic device is attained. In terms of function, the circuit arrangement represents a controllable Zener diode.

REFERENCES:
patent: 3665899 (1972-05-01), Nagy
patent: 3678298 (1972-07-01), Dyer
patent: 3705333 (1972-12-01), Galletto et al.
patent: 3803456 (1974-04-01), Myers

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