초록 ▼

A throttle controller for an internal combustion engine employs a stepper motor to move the throttle valve and provides a controller to permit the use of the stepper motor. The stepper motor requires no return spring or position sensor and hence offer weight and cost advantages. The throttle positio

A throttle controller for an internal combustion engine employs a stepper motor to move the throttle valve and provides a controller to permit the use of the stepper motor. The stepper motor requires no return spring or position sensor and hence offer weight and cost advantages. The throttle position is deduced by means of an up-down counter tracking movement of the stepper motor during throttle control. The controller includes an integration means to accommodate the unknown starting throttle position. A fuel cutoff solenoid is activated in the event of over-speed or power loss. An engine speed signal for the controller is produced by a variable reluctance sensor providing a signal to a slope detector circuit to eliminate the influence of external magnetic fields.

대표청구항 ▼

In an engine regulator for an internal combustion engine having a stepper motor for controlling the flow rate of air and fuel in response to a electric control signal, a controller for providing step pulses to the stepper motor in response to the electric control signal, the controller comprising: a

In an engine regulator for an internal combustion engine having a stepper motor for controlling the flow rate of air and fuel in response to a electric control signal, a controller for providing step pulses to the stepper motor in response to the electric control signal, the controller comprising: an oscillator for producing a periodic clock signal; a sequencer for receiving a direction and the clock signal for producing step pulses for moving the stepper motor in a direction for a predetermined number of steps; an up/down counter for receiving the direction and clock signals and producing a digital word updated in the direction indicated by the direction signal and in amount by a number indicated by the clock signal; and a comparator for comparing the digital word to the electric control signal and producing the direction signal.