Patent ID: 9593652
Date: 2017-03-14
CPC Classifications: F02D,F02M

Claim:
1. A method for operating a fluid injector with a longitudinal axis, a valve needle, an armature being mechanically coupled to the valve needle, and a solenoid assembly comprising at least first and second coils arranged in series and being operable to magnetically actuate the armature via an electrical signal applied to at least one predetermined assortment of the at least two coils, using a single switch to select among predetermined assortments, the method comprising: determining a pressure representing a fluid pressure within the fluid injector, selecting one of the predetermined assortments of the at least two coils dependent on the determined pressure, wherein the predetermined assortments comprise (i) only the first coil, and (ii) both coils in series, and applying the electrical signal using a first switch position of the single switch to the predetermined assortment comprising only the first coil if the determined pressure is less than or equal to a predetermined pressure threshold for the fluid injector, and switching the electrical signal using a second switch position of the single switch to run through the predetermined assortment comprising both coils in series if the determined pressure exceeds the predetermined pressure threshold for the fluid injector.