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A system for regulating the idle speed of an internal combustion engine. The engine has an alternator, and a voltage regulator having a Darlington circuit connected between an end of a field winding of the alternator and the ground. The Darlington circuit is responsive to the output voltage of the a

A system for regulating the idle speed of an internal combustion engine. The engine has an alternator, and a voltage regulator having a Darlington circuit connected between an end of a field winding of the alternator and the ground. The Darlington circuit is responsive to the output voltage of the alternator for controlling the current flowing a field winding of the alternator so as to regulate the output voltage of the alternator. The system has an integrator for integrating the voltage across the Darlington circuit and a comparator for comparing the output voltage of the integrator with a reference voltage and for producing an output voltage dependent on the comparison. A solenoid is operatively connected to a throttle valve of the engine. A switching transistor circuit is provided to respond to the output voltage of the comparator for allowing the current to pass through the solenoid and for actuating the throttle valve to regulate the idle speed.

대표청구항 ▼

A system for regulating the idle speed of an internal combustion engine having a throttle valve, an alternator, and a voltage regulator having a control circuit responsive to the output voltage of said alternator for controlling the current flowing through a field winding of said alternator so as to

A system for regulating the idle speed of an internal combustion engine having a throttle valve, an alternator, and a voltage regulator having a control circuit responsive to the output voltage of said alternator for controlling the current flowing through a field winding of said alternator so as to regulate the output voltage of said alternator, comprising: means comprising an integrator for integrating the voltage across said control circuit; means comprising a comparator for comparing the output voltage of said integrator with a reference voltage and for producing an output voltage dependent on the comparison; means comprising a solenoid operatively connected to said throttle valve for actuating the throttle valve; switching means responsive to said output voltage of said comparator for allowing current to pass through the solenoid and for actuating said throttle valve to regulate the idle speed, and means comprising a resistor for providing hysteresis effect on said comparator in order to prevent hunting of the operation of said solenoid.