Coded electromagnetic device and system therefor
AssigneeAllied-Signal Inc.
InventorDouglas R. Verner
Life of this patent
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Abstract
A code system for a device (30) that exhibits an input-output relationship characterized by an off-set and substantially linear performance (gain) comprising a resistor network (20) in cirucit with the device's coil (22), indicative of the device's GAIN and OFF-SET wherein the values of GAIN and OFF-SET are intrinsically coded within the value of a single resistor.
Claims16
A code system for a device including a coil that exhibits an input-output relationship characterized by an off-set such as a dead-zone and substantially linear input-output relationship (gain) comprising a resistor network in circuit with the coil, indicative of the device's GAIN and OFF-SET.
A method of operating a device such as a fuel injector whose performance is characterized by GAIN and OFF-SET values comprising the steps of:
- (a) measuring the relationship of commanded signal and output to establish the GAIN and OFF-SET values;
- (b) attaching a control resistor to the device have a resistance value that corresponds to the values of both the GAIN and OFF-SET;
- (c) installing such device in its normal operational environment;
- (d) measuring the value of the control resistor corresponding to a particular device,
- (e) enabling the normal operation of the installed device;
- (f) generating a control signal to the device wherein such control signal is proportional to the value of GAIN and OFF-SET as determined from the resistance value.
Dependencies are inferred from the claim text.