Excavating
Patent
1983-03-17
1986-01-14
Fleming, Michael R.
Excavating
371 15, G06F 1122
Patent
active
045649421
ABSTRACT:
An electric vehicle driven by a D.C. series motor is disclosed in which electric power is supplied from a battery to the motor through a chopper, and in which forward-motion and backward-motion commands generated by the switch operation of a driver and a torque command from an accelerator pedal are supplied to a control device having a microprocessor, to control the chopper. The control device further includes storage means which has stored therein a trouble shooting program in addition to a program for making an ordinary running control for the electric vehicle, and is provided with a connector jack for connecting a trouble-shooting operation part to the control device. When a starting switch provided in the trouble-shooting operation part is operated in the state that the trouble-shooting operation part is connected to the control device, the control device reads out the trouble shooting program, carries out trouble shooting, and displays the results of trouble shooting on a display device provided in the trouble-shooting operation part.
REFERENCES:
patent: Re31582 (1984-05-01), Hosaka et al.
patent: 4245309 (1981-01-01), Kiefer
patent: 4275464 (1981-06-01), Schmidt
patent: 4333149 (1982-06-01), Taylor
patent: 4394741 (1983-07-01), Lowndes
patent: 4412328 (1983-10-01), Homa
patent: 4418391 (1983-11-01), Asada et al.
patent: 4453517 (1984-06-01), Kasiewicz
patent: 4489414 (1984-12-01), Titherley
Fleming Michael R.
Hitachi , Ltd.
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