Method and apparatus for controlling a drive motor of a motor ve

Details Method and apparatus for controlling a drive motor of a motor ve Method and apparatus for controlling a drive motor of a motor ve

1990-05-21

1992-10-06

Ro, Bentsu

Electricity: motive power systems

Automatic and/or with time-delay means

With nonautomatic control means

318444, 318DIG2, B60S 108

Patent

active

051534886

ABSTRACT:
A method and apparatus for manually controlling a windscreen wiper drive motor in a motor vehicle in several speed steps, by which the drive motor can also be automatically switched from a manually switched-on speed step into a lower speed step when the speed passes through a predetermined threshold value of the motor vehicle travelling speed from a higher travelling speed. The apparatus and method provide automatic switching of the drive motor from each manually switched-on speed step into a lower speed step when the speed passes through the threshold value, cancellation of the current automatic switching until the speed again passes through the threshold value from a higher travelling speed when the control switch has been operated below the threshold value of the travelling speed and after the drive motor has been automatically switched into a lower speed step, and switching-on of each speed step of the drive motor selected by this operation of the control switch. The automatically switched-on lower speed step can be the next lower one or the system can switch from all switched-on speed steps to a single slow one.

REFERENCES:
patent: 4348726 (1982-09-01), Igarashi et al.
patent: 4389603 (1983-06-01), Kogawa et al.
patent: 4588935 (1986-05-01), Kaneiwa et al.
patent: 4625157 (1986-11-01), Phillimore

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