초록 ▼

A load control system for controlling the field current of an alternating current generator and the idle speed control system for the engine that drives the generator. A voltage regulator senses the output voltage of the generator and controls field current by causing a semiconductor switch connecte

A load control system for controlling the field current of an alternating current generator and the idle speed control system for the engine that drives the generator. A voltage regulator senses the output voltage of the generator and controls field current by causing a semiconductor switch connected in series with the field winding to switch on and off in accordance with the magnitude of the sensed voltage. The voltage regulator is controlled to operate in a conventional manner when engine speed is higher than engine idle speed. When engine speed is in an idle speed range the duty cycle or on time of the semiconductor is controlled such that consecutive occurring on times are gradually increased to gradually increase field current when the output voltage of the generator is below a desired regulated value. The system operates to actuate an engine idle speed control system to increase the amount of fuel-air mixture supplied to the engine when the on times of the semiconductor switch are being gradually increased. In the event that engine speed decreases by a predetermined amount when the engine is operating in the idle speed range the on time or duty cycle of the semiconductor switch is reduced to a minimum to prevent engine stall.

대표청구항 ▼

The method of controlling the field current of an alternating current generator that has an output winding and a field winding wherein the output winding feeds the electrical loads on a motor vehicle and wherein the generator is driven by the engine of the vehicle and for controlling the amount of f

The method of controlling the field current of an alternating current generator that has an output winding and a field winding wherein the output winding feeds the electrical loads on a motor vehicle and wherein the generator is driven by the engine of the vehicle and for controlling the amount of fuel-air mixture supplied to the engine, the steps comprising, determining whether engine speed is above or below a predetermined value, when engine speed is above said predetermined value continuously energizing said field winding for a time period that corresponds to the time that the output voltage of said output winding is below a desired regulated value and maintaining said field winding deenergized for a time period that corresponds to the time that output voltage of the output winding is above the desired regulated value, when engine speed is below said predetermined value causing said field winding to be alternately energized and deenergized when the output voltage of the output winding is below said desired regulated value and such that the time periods of field energization progressively increase, and while said engine speed is below said predetermined value increasing the fuel-air mixture supplied to the engine each time a time period of field energization increases.