pump governor. The maximum no load governed speed of HFC4DA1 and 4DA1-1 is 4000 4200 rpm. Maximum rated speed The maximum speed that the governor allows at full load. The maximum rated speed of HFC4DA1 and 4DA1-1 is 3600 rpm. Minimum rated speed 1. The allowable minimum speed at the following three maximum speed of engine: 45% of maximum rated speed, 1000rpm and the speed provided by the idling governor, whichever is greaterThe minimum rated speed of HFC4DA1 and 4DA1-1 is 1620 rpm. 2. The minimum speed specified by the manufacturer Full load filter paper type smoke Under full load (i.e.
external characteristics) working condition, the blackening of filter paper in a specific area (working diameter: 32 mm) by the smoke in a specified length of air column taken from the engine exhaust pipe To measure the speed range from the minimum to the maximum rated speed, arrange proper testing points including full load working conditions at the maximum power speed and maximum torque speed. Free accelerating working condition When the engine runs at idle speed, the condition that pedaling the accelerator pedal rapidly but gently to make the injection pump provide maximum fuel Keep this condition before the engine reaches the allowable maximum speed given by the governor.
Once it reaches the maximum speed, release the accelerator pedal to make engine returns to idling. Free accelerating filter paper type smoke Under free accelerating working condition, the blackening of filter paper in a specific area (working diameter:
32 mm) by the smoke in a specified length of air column taken from the engine exhaust pipe Speed characteristics The characteristics of main performance index (torque, power, oil consumption, exhaust temperature and smoke, etc.) changes depending on the speed when the engine fuel governing mechanism keeps the same External characteristic The speed characteristic when the engine fuel governing mechanism is fully opened It is also called full load speed characteristic. Load characteristic The characteristic of performance index changes depending on load when the engine keeps running at the same speed 25