What is the function of a retarder?
1 Answers
Retarders are auxiliary braking devices for large vehicles (trucks, buses), allowing heavier vehicles to decelerate smoothly without consuming the braking system. Currently, electromagnetic retarders are more commonly used, along with hydraulic turbine retarders. Electromagnetic retarder: It is equivalent to installing a "generator" on the driveshaft. When not electrified, there is no contact or wear. When deceleration is needed, the driver turns on the switch on the dashboard, and the driveshaft is subjected to the resistance of the electromagnetic field, achieving the braking effect. Hydraulic turbine retarder: An additional turbine chamber is added at the rear end of the transmission housing. When the braking circuit is activated, the transmission oil is pressurized in the turbine to create damping and achieve the braking effect. There is no wear, but additional heat dissipation is required. These are rarely used domestically.