mudslinger72712 Posted March 28, 2005 Report Share Posted March 28, 2005 What the hell is a Jacob Brake and it's use? Quote Link to comment Share on other sites More sharing options...
stclark816 Posted March 28, 2005 Report Share Posted March 28, 2005 You ever hear big Semis when they slow down make a loud ass noise? That's when they are using their jake brake. Something about shifting down blah blah blah, IM not real sure. But I think when you see signs that say "No Jake Brakes" it's because they are loud ass fook. That's my guess. Quote Link to comment Share on other sites More sharing options...
99screaminshee Posted March 28, 2005 Report Share Posted March 28, 2005 jake brake is an engine brake used on diesel motors on a big truck when its on and ur not touching the accelerator or clutch it is on and slows the motor down with no load it will continue to slow till the rpms reach idle. Quote Link to comment Share on other sites More sharing options...
01bansheeke Posted March 28, 2005 Report Share Posted March 28, 2005 jake brake is trucker talk..you ever hear that loud ass noise when a trucker is slowing down..also known as an exhaust break.basically uses the engine to slow the tractor trailer down Quote Link to comment Share on other sites More sharing options...
mudslinger72712 Posted March 28, 2005 Author Report Share Posted March 28, 2005 thanks for the info guys Quote Link to comment Share on other sites More sharing options...
racer Posted March 28, 2005 Report Share Posted March 28, 2005 jake brake is trucker talk..you ever hear that loud ass noise when a trucker is slowing down..also known as an exhaust break.basically uses the engine to slow the tractor trailer down 346007[/snapback] exactly. damn things are loud. Quote Link to comment Share on other sites More sharing options...
MudSlinger09 Posted March 28, 2005 Report Share Posted March 28, 2005 yeah thats a jake brake , might wanna just type in jake brake on google or somthin and find out tho , thats what my dad tells me to do Quote Link to comment Share on other sites More sharing options...
racer Posted March 28, 2005 Report Share Posted March 28, 2005 CLICKY Quote Link to comment Share on other sites More sharing options...
Bansheeman1121 Posted March 28, 2005 Report Share Posted March 28, 2005 Slows the valves down, my grandfathers been drivin trucks all his life and whenever i take a ride in one of those beasts i get a lesson on that switch known as the "jake brake" Quote Link to comment Share on other sites More sharing options...
04ShEeLE Posted March 28, 2005 Report Share Posted March 28, 2005 Correct me if i'm wrong please... but a jake brake (engine brake) retards the timing on a diesel engine, thus slowing it down. It is quite loud and where i live in the city or most populated areas they are "illegal" or frowned upon because it disturbs the residents Quote Link to comment Share on other sites More sharing options...
SHEe DEVIL Posted March 28, 2005 Report Share Posted March 28, 2005 The exhaust brake you are all hearing is basically a exhaust restrictor placed after the turbo. Imagine a butterfly that shuts the exhaust off almost completely making the engine work that much harder thus slowing it down rapidly. Quote Link to comment Share on other sites More sharing options...
patrolman808 Posted March 28, 2005 Report Share Posted March 28, 2005 (edited) Most open the exhaust valves on the compression stroke allowing the compression to go out of the cylinder, therefore the engine makes no power on a couple of cylinders, usually 2 or 4. That slows it down w/o burning up the brakes on long downhill grades, etc. Plus they sound really good through a set of 8" straight pipes. Most of the bigger trucks don't use the butterfly valves. Your light to medium duty trucks use those. Those are what you put on your Powestrokes and Cummins motors in the 3/4 and 1 tons. Too much expense to put a big-truck style exhaust brake on one. Edited March 28, 2005 by patrolman808 Quote Link to comment Share on other sites More sharing options...
txblueshee Posted March 28, 2005 Report Share Posted March 28, 2005 I got a buddy that runs a dump truck for excavating comp...... anytime he's coming home late he'll detour 10miles outa his way just to jake brake it by my house . Mike Quote Link to comment Share on other sites More sharing options...
STLBILL Posted March 29, 2005 Report Share Posted March 29, 2005 I got a buddy that runs a dump truck for excavating comp...... anytime he's coming home late he'll detour 10miles outa his way just to jake brake it by my house .Mike 346346[/snapback] Guess he won't be involved in the next Teamster's strike about the high cost of diesel then, huh? -Bill Quote Link to comment Share on other sites More sharing options...
red ore Posted March 29, 2005 Report Share Posted March 29, 2005 (edited) Most open the exhaust valves on the compression stroke allowing the compression to go out of the cylinder, therefore the engine makes no power on a couple of cylinders, usually 2 or 4. That slows it down w/o burning up the brakes on long downhill grades, etc. Plus they sound really good through a set of 8" straight pipes. Most of the bigger trucks don't use the butterfly valves. Your light to medium duty trucks use those. Those are what you put on your Powestrokes and Cummins motors in the 3/4 and 1 tons. Too much expense to put a big-truck style exhaust brake on one. 346344[/snapback] The Jake brake opens the exhaust valve just as the air reaches maximum compression, dumping all of that energy in an almost instantaneous explosive release. The result is a very effective slowing of the vehicle as mechanical energy is converted to heat and then dumped. The Jake brake effectively transforms the internal combustion engine into an air compressor. What my wife said (SHEe DEVIL) about the exhaust brake is also true. More common then you might think, they are commonly used on smaller deisel engines, and even some bigger ones. Usually on deisel engines under 400HP ....IE Cummins N14 and smaller or Cat C-12 and smaller. I have a C-11 in my sterling, and it has an exhaust brake, not a Jake. Its a slow ass pig when loaded up over 60,000 gvw, but I dont go really far either, usually under 300 miles one way. Both are loud, but the jake is much louder, and both are illegal within city limits...... Edited March 29, 2005 by red ore Quote Link to comment Share on other sites More sharing options...
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