The all-mode engine crankshaft speed controller is located in the collapse of the high-pressure fuel pump housing and is actuated from its camshaft;
- designed to automatically maintain any speed mode from minimum to maximum
The operation of the regulator is based on the use of centrifugal forces.
For example, if there is additional resistance to the movement of the car (on the rise), the crankshaft speed will decrease, and the speed of the car will fall.
In order to maintain them at a given level, it is necessary to increase the engine torque. This can be achieved by increasing the amount of fuel injected into the engine cylinders.
The all-speed governor senses a reduction in shaft speed and automatically increases the fuel supply by the high pressure pump, so that the vehicle speed is restored to the set value.
Similarly, the all-mode regulator changes the fuel supply when the engine load decreases, only in this case, the control action of the regulator is reduced to a decrease in the amount of injected fuel.
As a result, when the load on the engine is reduced, the speed of movement decreases and it is brought to a predetermined level.
The crankshaft speed maintained by the regulator at full diesel power is called nominal. It corresponds to the position of the lever 1 (fig.) of the regulator control when it rests on the bolt 7.
If the load is removed in this position of the lever, the diesel engine will develop the maximum idling speed.
By moving the governor control lever clockwise, you can achieve the minimum idle speed. It corresponds to the position of the lever when it rests on bolt 2.
Restricting the maximum speed of the crankshaft is due to the need to protect the engine from damage due to excessive loads, and limiting the speed too low is due to poor fuel supply and mixture formation, which can cause sudden engine shutdown.
The all-mode speed controller is arranged (Fig. 2) as follows.
The regulator is installed in the collapse of the high pressure fuel pump housing.
The drive gear 21 of the regulator is installed on the cam shaft of the pump, the rotation of which is transmitted through rubber crackers 22.
The driven gear is made integral with the holder of 9 weights, rotating on two ball bearings.
When the holder rotates, the loads 13, swinging on the axes 10, diverge under the action of centrifugal forces and move the clutch 12 through the thrust bearing 11.
The clutch, resting against the pin 14, in turn moves the lever 82 of the cargo clutch.
Lever 32 is fixed at one end to axis 33, and at the other end is connected through a pin to rail 27 of the fuel pump. A lever 31 is fixed on the axis 33, the other end of which moves all the way into the adjusting bolt 24 of the fuel supply.
The lever 32 transmits the force to the lever 31 through the corrector 15.
Fuel control lever 1 (Fig. 1) is rigidly connected to lever 20 (see Fig. 2). The spring 26 is attached to the levers 20, 31, the starting spring 28 is attached to the levers 25, 30.
During the operation of the regulator in a certain mode, the centrifugal forces of the weights are balanced by the force of the spring 26.
With an increase in the rotational speed of the crankshaft of the regulator, overcoming the resistance of spring 26, the weights move the lever 32 of the regulator with the fuel pump rail - the fuel supply decreases.
When the crankshaft speed decreases, the centrifugal force of the weights decreases, and the regulator lever 32 with the fuel pump rack moves in the opposite direction under the action of the spring force - the fuel supply and the crankshaft speed increase
The fuel supply is turned off by turning the stop lever 3 (Fig. 1) until it stops in the bolt 6, while the lever 3, having overcome the force of the spring 26 (Fig. 2), will turn the levers 31 and 32 through the pin 29; the rail will move until the fuel supply is completely turned off.
When the force is removed from the stop lever, under the action of the spring, the lever will return to its working position, and the starting spring 16 through lever 30 will return the fuel pump rail necessary for starting