What Is PTO?

PTO stands for the abbreviation of 3 words - pulse train output, the first word pulse stands for a pulse, and train stands for a series, or a line, which means a string. The output is called a series of pulses when connected together. Auxiliary power take-off devices are usually laid on special vehicles, such as dump trucks, refrigerated trucks, garbage trucks, mixer trucks, etc. The engines of these vehicles need to provide power to the lifting system of the dump truck in addition to driving the traveling mechanism. The refrigeration system of the refrigerated truck provides power, and the stirring mechanism of the mixer truck needs to be powered, etc.

Why are there two switches for the power take-off?

In order to ensure the correct operation of the power take-off, two switches are provided. There are two switches that need to be in gear, one is for neutral power, and the other is for jack pump power. The power take-off is controlled by two switches and two pneumatic solenoid valves. During operation, it is not only easy to press the two PTO switches at the same time by mistake, causing the two pneumatic solenoid valves to work at the same time, resulting in the piston of the full-power PTO not working. And there is also the defect that when one of the switches is pressed, the other switch must be turned off, otherwise, the piston cannot work normally.

How does PTO work?

PTO auxiliary power take-off device can change the engine speed to maintain the normal work of other equipment. The PTO auxiliary power take-off switch is generally installed on the center console of the vehicle in the form of a knob. A position on the rotary switch represents a fixed speed, and the user can adjust it according to the power demand, and this function can also be turned off.

Classification of power take-offs:

PTO is divided into mechanical control, hydraulic control, air control, vacuum source control, electric control, and other operating methods, among which air control is more common. Different power output forms can usually be divided into transmission side power output form, transmission front power output form, transmission rear power output form, and engine front power output form.

What is the difference between PWM and PTO?

PWM can adjust the pulse width (duty cycle), the number of pulses is unlimited, and there will always be output if it is not turned off.

PTO has a fixed duty cycle of 50% and cannot be adjusted, but the number of pulses can be controlled.