Electricity: motive power systems – Motor-reversing – Automatic and/or with time-delay means
Patent
1995-05-04
1997-03-11
Ro, Bentsu
Electricity: motive power systems
Motor-reversing
Automatic and/or with time-delay means
318469, E05F 1516, G05B 902
Patent
active
056104847
ABSTRACT:
A power closure system for a motor vehicle includes a closure, a closure frame, an electric motor, a first displacement sensor and a microprocessor. The electric motor has an output shaft. The closure frame defines a seated position of the closure. The displacement sensors both indicate rotation of the drive motor output shaft, with the second sensor being offset from the first sensor. The microprocessor includes means for measuring a first time for the output shaft of the motor to rotate a predetermined amount using signals from the first sensor. The microprocessor also includes means for measuring a second time for the output shaft of the motor to rotate a predetermined amount using signals from the first sensor. As well, the microprocessor includes means for establishing a reference, or limiting, time signal for the second time signal using the first time signal. The microprocessor has means for comparing the second signal to the reference or limit signal. The microprocessor additionally includes means for reversing the motor if the second signal is greater than the reference signal for a predetermined period of time.
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ITT Automotive Electrical Systems Inc.
Lewis J. Gordon
Ro Bentsu
Twomey Thomas N.
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