American Truck Simulator

American Truck Simulator

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GenBrien Jan 29, 2016 @ 10:11am
Trailer brake?
Someone knows how it'll work

I saw in Squirell's video, in the option menu, that there is now trailer brakes.

Arent they connected to the brake pedal and brake at the same time as the truck?
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Wolfpig Jan 29, 2016 @ 10:40am 
No idea how it works in ATS, but in ETS 2 the trailerbrakes work together with the normal ones (everything else is not allowed), but they added a seperate trailerbrake to the game a long time ago (out of popular demand) which can be used after binded to a new key.

Guess that the first thing (normal brake brakes trailer too) is in ATS too, and the Trailerbrake is an optional feature.
LittleBlueDuneBuggy Jan 30, 2016 @ 12:31pm 
IRL, they are both connected to the "treadle valve" - the pedal on the floor. You have a separate lever on the steering column called a "jonny valve", that will acuate the trailer brakes separately, but that is mainly used for testing trailer brakes during a pre-trip.

You also have separate knobs to pull out on the dash. The yellow one activates all brakes. The red one activates only the trailer, but is actually called a "tractor protection valve". If you start losing air pressure in the trailer, it will keep the tractor's brakes from locking up, and allow you to still have control of the truck to get the load safely stopped.

As far as the game is concerned, I have no idea, lol.
Carvalho Feb 15, 2016 @ 1:57pm 
I wish to know about this as well. I have no idea if I need to configurate this key on my G27 setup or should I leave it behind. I already set up the exhaust brake and retarder, but this trailer brake I have no idea.

It's the same thing if I brake with my pedal? If so, why we have this keybind on the game to configure?
Trego Feb 15, 2016 @ 2:01pm 
Originally posted by LittleBlueDuneBuggy:
IRL, they are both connected to the "treadle valve" - the pedal on the floor. You have a separate lever on the steering column called a "jonny valve", that will acuate the trailer brakes separately, but that is mainly used for testing trailer brakes during a pre-trip.

You also have separate knobs to pull out on the dash. The yellow one activates all brakes. The red one activates only the trailer, but is actually called a "tractor protection valve". If you start losing air pressure in the trailer, it will keep the tractor's brakes from locking up, and allow you to still have control of the truck to get the load safely stopped.

As far as the game is concerned, I have no idea, lol.


That was very interesting, thanks. But your last line was the best ... :)
Tommy_Dr1v3r_CZE Feb 15, 2016 @ 2:11pm 
Trailer brake in ATS and ETS is independent brake which applies brakes on trailer only - perfect to use in sharp turns OR you can use it as Hill holder - when you stop for example on red light and you are on top of hill...
Syd Khaos Feb 15, 2016 @ 2:12pm 
Originally posted by Carvalho:
It's the same thing if I brake with my pedal? If so, why we have this keybind on the game to configure?

Because there are many situation where braking your trailer and nothing else is really helpful.

Main brakes on these trucks use alot of air...and it can be kinda hard to just brake a few MPH off your speed with main brakes.

Mains are low on air.
Going downhill with CC engaged.
Slowing down a tiny bit (2-3MPH off of current speed).

and so forth....
All great times to use a little trailer brake.
Also worth saying that in real life many citys/towns have laws against Jaking (engine brake) while inside city/town limits. Or at least populated areas.
If you dont know why go ingame, get your truck goign about 80MPH, change to outside view and Jake....if you have good speaker system you will instantly understand why =)
Tommy_Dr1v3r_CZE Feb 15, 2016 @ 2:23pm 
Originally posted by Carvalho:
I wish to know about this as well. I have no idea if I need to configurate this key on my G27 setup or should I leave it behind. I already set up the exhaust brake and retarder, but this trailer brake I have no idea.

It's the same thing if I brake with my pedal? If so, why we have this keybind on the game to configure?
When use brake pedal - it applies brakes to truck + trailer. When you press key "Trailer brake" - it applies brakes on trailer only - especially when raining or in sharp turn it is very useful.
Mercury Feb 15, 2016 @ 2:36pm 
The "Spike" ( trailer brake ) can be used if you are stopped on an uphill grade to prevent you from rolling backwards while you are trying to move forward. I use it in my job to slow me down on downhill grades but if you over use it, you can either lock up the trailer brakes and your trailer will skid usually sideways if the road is slippery or you will fade your brakes meaning they will overheat and become ineffective. The latter can be disasterous going down very steep grades like the mountains. It is just another option for slowing and stopping but it is not to be used for parking.
Syd Khaos Feb 15, 2016 @ 2:40pm 
Originally posted by Nußknacker:
The "Spike" ( trailer brake ) can be used if you are stopped on an uphill grade to prevent you from rolling backwards while you are trying to move forward. I use it in my job to slow me down on downhill grades but if you over use it, you can either lock up the trailer brakes and your trailer will skid usually sideways if the road is slippery or you will fade your brakes meaning they will overheat and become ineffective. The latter can be disasterous going down very steep grades like the mountains. It is just another option for slowing and stopping but it is not to be used for parking.
You an actual US trucker??

I am really curious as to why the trucking industry has not changed over to carbon-ceramic or poly-ceramic brakes?

These type of braking systems can virtualy eliminate brake-fade on high-end (read: 200+MPH) racing cars. And there are carbon-ceramic pads n such that are comparable in cost to graphite pads.
Though most ceramics will wear about 5% faster on race-cars...dont seem like enough to make a huge difference for this type of application.
Last edited by Syd Khaos; Feb 15, 2016 @ 2:41pm
Mercury Feb 15, 2016 @ 2:49pm 
I drive in Canada. Been driving tractor trailer since 1978. I know that alot have changes have come through but I don't know of the cabon-ceraminc brakes on trucks. It may be because of the prices but I'm now sure. Companies don't really like to spend money, only make money. One thing I hate is the ABS on trucks and I miss the old Front Brake Limiting Valve for the steers. I found there was a lot less skip out on the turns on slippery roads back then and it helped alot with keeping control during braking on icy or wet roads.
Originally posted by Nußknacker:
I drive in Canada. Been driving tractor trailer since 1978. I know that alot have changes have come through but I don't know of the cabon-ceraminc brakes on trucks. It may be because of the prices but I'm now sure. Companies don't really like to spend money, only make money. One thing I hate is the ABS on trucks and I miss the old Front Brake Limiting Valve for the steers. I found there was a lot less skip out on the turns on slippery roads back then and it helped alot with keeping control during braking on icy or wet roads.

I thought they got rid of the front brake limiting valve, because they proved it was snake oil in the first place.
GenBrien Feb 15, 2016 @ 3:22pm 
Originally posted by SydKhaos:
I am really curious as to why the trucking industry has not changed over to carbon-ceramic or poly-ceramic brakes?

These type of braking systems can virtualy eliminate brake-fade on high-end (read: 200+MPH) racing cars. And there are carbon-ceramic pads n such that are comparable in cost to graphite pads.
Though most ceramics will wear about 5% faster on race-cars...dont seem like enough to make a huge difference for this type of application.

carbon brakes need to be at least 400-500 celcius to be effective. Below that you dont have much braking power. Plus they cost A LOT
Mercury Feb 15, 2016 @ 3:35pm 
Personally I found the front brake limiting valve to be effective for me, but that's just my experience with it.
Syd Khaos Feb 15, 2016 @ 3:54pm 
Originally posted by GenBrien:
carbon brakes need to be at least 400-500 celcius to be effective. Below that you dont have much braking power. Plus they cost A LOT

There are carbon-ceramic pads out there that are hardly more costly than graphite ones.

I find it a little hard to belive they need to be that hot to even operate...considering there are street-legal cars using them.
I dont think poly-ceramics are street-legal, but I know plenty of carbon-ceramic ones are.
GenBrien Feb 15, 2016 @ 3:59pm 
Originally posted by SydKhaos:
Originally posted by GenBrien:
carbon brakes need to be at least 400-500 celcius to be effective. Below that you dont have much braking power. Plus they cost A LOT

There are carbon-ceramic pads out there that are hardly more costly than graphite ones.

I find it a little hard to belive they need to be that hot to even operate...considering there are street-legal cars using them.
I dont think poly-ceramics are street-legal, but I know plenty of carbon-ceramic ones are.
maybe i was mixing them.
i was talking about GTs and LMPs brakes
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Date Posted: Jan 29, 2016 @ 10:11am
Posts: 16