| 摘要 |
In a preferred form, this disclosure relates to an electrical control system for controlling operation of a windshield wiper unit and a washer unit for an automotive vehicle, and in which the wiper unit has a pair of oscillatable wipers which are moved through outboard and inboard strokes during each cycle of operation. The electrical control system comprises a power source, an electric motor means for driving the wipers, an electrically operated washer unit and a first control circuit means including a manual switch for effecting either low or high speed continuous operation of the wipers and a second manual switch for controlling operation of the washer unit. The electrical control system further includes a second control circuit means in parallel with a first control circuit means and which includes a transistor means connected in series with the motor means, an RC electrical time delay means connected with the base of the transistor means and a push button control switch. The control switch is operable when partially depressed to effect operation of the wiper motor through either a single cycle of operation, any number up to a predetermined number of cycles of operation or any number plus a predetermined number of cycles of operation depending upon the length of time the control switch is partially depressed prior to being released and is operable when momentarily fully depressed to effect simultaneous operation of the washer unit and the wiper unit for a predetermined number of cycles of operation and with the wiper motor shutting off automatically subsequent to the cessation of washer operation.
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