Backward drive control system for motorcycle

Details Backward drive control system for motorcycle Backward drive control system for motorcycle

1999-08-26

2000-04-25

Ro, Bentsu

Electricity: motive power systems

Automatic and/or with time-delay means

Responsive to thermal conditions

318434, 318452, 318473, 318484, 74 6, 361 25, 361 28, F02N 1110

Patent

active

060548266

ABSTRACT:
Backward movement of a heavy motorcycle is assisted by a starter motor for cranking an engine of the motorcycle. A backward drive control system includes a pulse width modulation circuit for supplying operating current to the starter motor in a controlled manner and a device for estimating operating temperature of the starter motor based on the current supplied to the starter motor. When the estimated temperature reaches a predetermined maximum temperature, the operation of the starter motor is compulsorily stopped and prohibited for a certain period or until the starter motor is cooled down to a certain temperature level. Overheating of the starter motor is effectively prevented without using a temperature sensor for measuring the operating temperature.
Moreover, chattering of the starter motor does not occur because its operation is prohibited for a certain period after the starter motor is once compulsorily stopped.

REFERENCES:
patent: 4683777 (1987-08-01), Nakayama
patent: 4827148 (1989-05-01), Hirosawa et al.
patent: 4869332 (1989-09-01), Fujita et al.
patent: 5024113 (1991-06-01), Ito et al.
patent: 5770901 (1998-06-01), Niimi et al.

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