G - Physics – 05 – D
Patent
G - Physics
05
D
341/91
G05D 13/62 (2006.01) F02D 31/00 (2006.01) F02B 3/06 (2006.01)
Patent
CA 1088650
ELECTRONIC DIGITAL GOVERNOR Abstract of the Disclosure The present invention relates to an electronic digital governor for controlling the RPM of an engine. The governor is comprised of a clock generator which includes a clear pulse generator and a latch pulse generator. A sensor is provided for receiving a train of pulses whose number per unit time is proportional to the RPM of the engine. A counter is provided connected to the sensor for counting the number of pulses in the train of pulses. The count is carried out between consecutive clear pulses fed to the counter from the clear pulse generator. A latch is provided connected to the counter for storing a count accumulated between con- secutive clear pulses. The latch is controlled by latch pulses from the latch pulse generator. The time duration between consecutive clear pulses and consecutive latch pulses is the same and is equal to a predetermined time period T. A comparator is provided which has a first input connected to the latch and a second input connected to a switch which is manually controllable to enter an upper bound RPM value. The comparator compares the stored count in the latch with the upper bound RPM value and activates a relay if the stored value is greater than the upper bound RPM value. An electromechanical device is provided which is controllable by the relay for controlling the RPM of the engine to reduce the RPM below the upper bound RPM value.
271857
Kirby Eades Gale Baker
Mason Ralph I.
Shaw Gmc Trucks Ltd.
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