Patent ID: 7292007

Claim:
A vehicular generation control apparatus operative to control an electric generation status of a vehicle electric generator having an armature winding, an excitation winding and a rectifier connected to the armature winding, comprising: a flywheel diode connected to the excitation winding in parallel thereto; switch means connected to the excitation winding to be turned on and off in response to a control signal being inputted; control signal setting means operative to control a duty ratio of the switch means depending on a first electric generation status of the vehicle electric generator for controlling an electric current flowing through the excitation winding while setting the control signal, to be applied to the switch element, so as to vary a switching frequency of the switch means depending on a second electric generation status; and signal outputting means connected to a junction point between the excitation winding and the switch means and operative to output a signal, involving a component of the duty ratio associated with the first electric generation status and a component of the switching frequency associated with the second electric generation status, to an external device through a signal line.