US Patent 7291814 Grip heater control apparatus

A grip heater control apparatus (7) capable of increasing the opportunities to enable a heater (2) to warm a grip (1) while suppressing a voltage drop of a battery (10), the grip heater control apparatus comprising a heater (2) for generating heat by means of electric power supplied from the battery (10), the heater being provided in a grip (1) of a steering handle of a vehicle having a generator (9) for generating electricity interlocking with the rotation of an engine as a propulsive source and the battery (10) charged by the generator (9), and a heater control unit for controlling the electric energy supplied to the heater (2) from the battery (10), wherein a revolutions detecting unit is provided for detecting the number of revolutions of the engine or the generator (9) and the heater control unit includes a unit for determining an upper limit on the upper limit electric energy supplied to the heater (2) depending on the detected number of revolutions.