Difference Between Proportional and Time Delay Brake Controllers

Proportional Brake Controller

With proportional brake controllers, once the brake pedal is stepped on, a motion sensing device knows how PROPORTIONAL_BRAKE_CONTROLLERfast the tow vehicle is stopping. It then applies power to the trailer brakes equally as fast (or slow) as the towing vehicle. This allows the trailer to stop at the same rate as the tow vehicle. Therefore, in an extreme stopping situation where the vehicle brakes are slammed on, a proportional controller will immediately send the maximum preset power to the trailer brakes.  This type of brake controller provides the smoothest and quickest braking while also providing the least amount of wear on both the vehicle’s and trailer’s brakes. Proportional controllers are “enabled” by the brake pedal switch and “activated” by a pendulum circuit that senses the vehicle’s stopping motion and applies a proportional voltage to the trailer’s brakes. When properly adjusted the trailer will decelerate at the same rate as the tow vehicle, increasing braking efficiency and reducing brake wear.

Time Delayed Brake Controller

With Time Delayed trailer brake controllers, once the brake pedal is stepped on, the pre-determined amount TIME_DELAYED_BRAKE_CONTROLLERof power (which is set by the user, based on trailer weight) is sent back to the trailer brakes. On time delayed controllers, a delay always exists from when the brake pedal is pushed to when the unit reaches the user set, maximum power output. The delay can be shortened or lengthened with the ‘sync’ switch, available on most time delayed controllers, but it behaves the same way for every stop (slow or fast). If the sync switch is set too low, the vehicle will do most of the initial braking, putting extra strain on the vehicle’s brakes. If the sync switch is set too high, the trailer will be braking harder. So in most cases, either the truck or the trailer will be doing the majority of the braking, resulting in uneven brake wear.  The time delayed brake controller system is easily installed and is very user friendly. It can be mounted at any angle. It also has a low profile. The amount of power that is sent back to the brakes is adjustable using a control on the brake controller.  With most time delayed brake controllers, when towing with the hazard flashers on, the digital display will flash with the hazard flashers. If the brake controller is set too aggressively, pulsing may occur which will be felt in the trailer brakes.

RSS feed for comments on this post. TrackBack URI

Leave a Reply