Control circuit for road and engine speed governor
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jun 12, 1984
Grant Date -
N/A
app pub date -
Jan 20, 1983
filing date -
Jan 20, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An electronic control circuit is disclosed for an engine and load speed governor of the type comprising an overriding throttle closing device. The control circuit comprises engine speed signal generating circuit and a load speed generating circuit to provide electrical speed signals to the input of a microprocessor. The microprocessor develops motor control signals for a reversible electric motor which drives the actuator for the throttle limiting device. The motor control signals for operation in the close throttle direction and the open throttle direction are developed at different outputs of the microprocessor and applied to respective inputs of a motor driver circuit. The motor control signals produced by the microprocessor are time modulated, either pulse rate or pulse width, in accordance with the operating conditions of the engine or load to provide operation of the motor at precisely controlled slow speeds. Unmodulated motor control signals are also produced by the microprocessor under certain operating conditions to provide operation of the motor at full speed.
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