Power window control apparatus

Details Power window control apparatus Power window control apparatus

1998-05-28

1999-08-31

Ro, Bentsu

Electricity: motive power systems

Plural diverse motor controls

Motor-reversing

318630, 318632, 318469, B60J 117, G05B 902

Patent

active

059457961

ABSTRACT:
Disclosed is a power window control apparatus which is enhanced in the precision of judging when a foreign matter is caught by a vehicle window in its closing stroke, and is capable of preventing detection errors when the foreign matter is caught by. Such apparatus comprises a first gear for transmitting rotation of a motor, a second gear for driving up or down the vehicle window, an encoder for converting the rotational angle of the motor into a pulse signal, calculating section for canceling fluctuations of the pulse signal due to engagement of the first and second gears, and calculating the frequency value of the pulse signal, and judging section for judging that a foreign matter is caught by the vehicle window when the frequency value calculated by the calculating means is equal to or exceeds a specified reference value.

REFERENCES:
patent: 5404673 (1995-04-01), Takeda et al.
patent: 5436539 (1995-07-01), Wrenbeck et al.
patent: 5705755 (1998-01-01), Yamamura

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