DEVICE TO AUTOMATICALLY CONTROL SPEED OF DIESEL LOCOMOTIVE WITH ELECTRICAL TRANSMISSION Russian patent published in 1995 - IPC

FIELD: railway transport. SUBSTANCE: in speed parameters evaluation unit 2 sign and speed deviation Δv_з are determined by running and preset speed comparing element 23 and intensity of change of speed running value Δv_ф, by threshold element 25. Moreover, by adjusting comparator 24, width of dead zone of device to speed deviation is set. Locomotive speed control is provided by stepped control unit 4 which supplies signals for notching up or down the diesel engine speed governor through diesel engine speed governor control unit 16, or by stepless control unit 3 which steplessly changes generator current by means of generator or current control unit 5. Signals from evaluation unit 2 are supplied to control inputs of units 3 and 4, and control output is selected depending on signal supplied to information inputs by means of constant jumpers. When notching up diesel engine speed governor, unit 4 provides pulse control of locomotive sanders 19 through unit 20 made in form of relay switch. When notching down diesel engine speed governor, unit 4 provides pulse control of locomotive brakes 21 through unit 22 made in form of relay switch. EFFECT: enhanced reliability of control. 1 dwg