초록 ▼

In a diesel-electric locomotive, maximum speed of the diesel engine is automatically limited as a function of the temperature of the engine lubricating oil so as to prevent damage to the engine, to the engine-driven lube oil pump, and to the external components of the engine lube oil system when the

In a diesel-electric locomotive, maximum speed of the diesel engine is automatically limited as a function of the temperature of the engine lubricating oil so as to prevent damage to the engine, to the engine-driven lube oil pump, and to the external components of the engine lube oil system when the oil is relatively cool and hence very viscous.

대표청구항 ▼

In a system comprising a variable-speed prime mover, means including an oil cooler for supplying lubricating oil to the prime mover, throttle means for selecting the operating speed of the prime mover, a controller coupled to the throttle means for providing a speed command signal having a value tha

In a system comprising a variable-speed prime mover, means including an oil cooler for supplying lubricating oil to the prime mover, throttle means for selecting the operating speed of the prime mover, a controller coupled to the throttle means for providing a speed command signal having a value that normally varies with the selected speed, and speed control means responsive to the command signal for regulating the actual speed of the prime mover, the improvement comprising: a. means for sensing the temperature of the lubricating oil on the hot oil side of the oil cooler; and b. maximum speed limiting means associated with the controller and connected to said temperature sensing means for preventing the speed command signal from exceeding a predetermined relatively low value if the sensed oil temperature is below a preset minimum level and for preventing the speed command signal from exceeding another predetermined value which is higher than said predetermined low value if the sensed oil temperature is in a range above said minimum level but not above a predetermined higher level.