Air pressure governor for air brake systems
Tryckregulator för bromssystem
Video show what design detail in the governor that determines the cut in and cut out pressure difference.
Videon visar vad i regulatorn som bestämmer tryckdifferensen i regulatorn
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Learn how the air brake governor works to pass your CDL Air Brakes Course – watch the video! Subscribe Today! ► Get 30% OFF Air Brake Course. Coupon “youtube30” CLICK THE LINK
During your CDL pre-trip inspection, the governor must be tested. Watch the video to learn how!
On an air brake equipped vehicle, the compressor pumps air the entire time the motor is running. The governor controls the compressor. The governor puts the compressor into the load (cut-in) and unload (cut-out) phase. It’s like a thermostat on a furnace. When the temperature in the house reaches a minimum, the thermostat turns the furnace on; and when the temperature in the house reaches a maximum, the thermostat turns the furnace off. Like the thermostat that controls the furnace within a temperature range, the governor controls the compressor within a pressure range – often between 100 (670kPa) and 135psi (930kPa). When the pressure reaches a minimum, the governor directs the air from the compressor into the system (load phase); when the system reaches a maximum air pressure, the governor directs the air pressure into the atmosphere (unload phase). The governor is nothing more than an on/off switch that works within a range.
A more detailed look at the air braking system, in particular with this video at the air brake relay.
Relays are fitted to an air braking system for larger vehicles to speed up the application and release of the brakes, minimising brake lag, which is the time it takes between the driver operating the controls (park brake/foot brake valve) and the action actually happening at the brakes.
For a bit more background before watching this video, take a look at our “introduction to air brakes”
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