Jake Braking A 5er Down Long Steep Incline
Just arrived at our vacation destination yesterday. I had my factory “jake”brake set and the cruise control on when I crested the top of the largest hill going into this part of the country. I’ve ...
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For down hill descents I run the exhaust brake on “auto”. When the auto EB is selected the back pressure is regulated to try to maintain the speed the truck was travelling the moment either the throttle or brake pedal were released..
Say you are coming down a steep grade and you have the EB set to auto. The speed you are travelling when you release the throttle is the speed the EB will try to maintain; If you come to a curve and apply the brakes to slow down a bit the new speed set point will be the speed you are travelling the instant you release the brake pedal. After the curve if you want to speed up a bit simply touch the throttle slightly until you are travelling your desired speed again …. a new speed set point will be stored the instant you remove your foot from the throttle. When using the auto EB the wheel brakes (truck and trailer) will only be applied in the event the EB is unable to provide enough back pressure to control your rate of descent. In this case the truck will slowly accelerate with the EB providing full back pressure until the engine reaches red line (4000 rpm), at this point the wheel brakes are momentarily applied to slow the rig down a bit at which point the brakes are released and the truck starts to slowly gain speed again. If having this cycle persist is not desirable you can apply the brakes to slow down enough for the transmission to drop another gear.
Say you are coming down a steep grade and you have the EB set to auto. The speed you are travelling when you release the throttle is the speed the EB will try to maintain; If you come to a curve and apply the brakes to slow down a bit the new speed set point will be the speed you are travelling the instant you release the brake pedal. After the curve if you want to speed up a bit simply touch the throttle slightly until you are travelling your desired speed again …. a new speed set point will be stored the instant you remove your foot from the throttle. When using the auto EB the wheel brakes (truck and trailer) will only be applied in the event the EB is unable to provide enough back pressure to control your rate of descent. In this case the truck will slowly accelerate with the EB providing full back pressure until the engine reaches red line (4000 rpm), at this point the wheel brakes are momentarily applied to slow the rig down a bit at which point the brakes are released and the truck starts to slowly gain speed again. If having this cycle persist is not desirable you can apply the brakes to slow down enough for the transmission to drop another gear.
