Current control system for linear solenoid

Details Current control system for linear solenoid Current control system for linear solenoid

1997-03-24

1999-09-14

Cuchlinski, Jr., William A.

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

Transmission control

701 62, 701 66, 361146, 361152, G06F 1900

Patent

active

059516160

ABSTRACT:
A current control system for a linear solenoid for feedback-controlling an output voltage value on the basis of a difference between a command current value to the linear solenoid, as set according to a vehicle running state, and a feedback current value, as produced by monitoring a current value to be really fed to the linear solenoid, including: a decision circuit that decides whether or not the resistance value of the linear solenoid can be calculated; a real resistance value calculating circuit that calculates a real resistance value on the basis of a signal coming from the decision circuit, the command current value and the output voltage value; a comparison circuit that compares the calculated real resistance value and a resistance value in a memory unit; and a correction circuit that corrects the resistance value in the memory unit on the basis of the comparison result from the comparison circuit. The output voltage value is outputted on the basis of the corrected resistance value.

REFERENCES:
patent: 5251091 (1993-10-01), Ito et al.

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