Continental 590 DC governor three-phase alarm code should be "3 PHASE FAILED", check whether the power supply is normal, there is no lack of phase phenomenon.
When the load is reduced, the engine speed rises, and the fly ball opens outward to move the speed lever to the right. At this time, the servo piston has not yet acted, so the upper end point A of the feedback lever AC is temporarily used as a fixed point, and the lever AC rotates around A counterclockwise.
Drive the slide valve to the right, open the control hole, high-pressure oil into the right cavity of the power cylinder, the left cavity and the low-pressure oil circuit. This high-pressure oil will push the servo piston to drive the injection lever to the left, and according to the new load and reduce the amount of fuel supply.
Expanded:
The working principle is as follows:
When the load decreases, the rotational speed of the drive shaft driven by the crankshaft increases, and the centrifugal force of the flying ball increases, pushing the speed lever to the right. Thus, the rocker to point A as the center of counterclockwise rotation, slide valve right, pressure oil into the servo cylinder right space. At the same time, the left space of the cylinder is connected to the low-pressure oil circuit through an oil hole, in which the oil is drained.
Under the action of the pressure difference, the servo piston drives the injection pump rack to move left to reduce the oil supply. When the rotational speed returns to its original value, the slide valve also returns to the central position and the regulation process ends.
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