No Engine Brakes Allowed? WTF!!
Fleet Mechanic
Joined: Jan 2007
Posts: 1,741
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Originally Posted by SLAYER1
Hey ENVY, thats funny you said that, i hunt up in Llano off of 2323 and thats the only place in Texas I've seen that sign.
Any town that has more than about 5 cows within 1-3 miles of the city limits usually has them, since, on a percentage basis, bull-haulers are by far the worst offenders in the noise category.
-blaine
FTE Leadership Emeritus
Joined: Sep 2000
Posts: 23,174
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From: Stephensville WI
Originally Posted by Gage2502
Ok I know this is a dumb question but can you install a jake break on a 2005 V10?
Dont really know that much about them, also how do they work?
Dont really know that much about them, also how do they work?
From http://en.wikipedia.org/wiki/Jake_brake
When the accelerator is released on a truck its forward momentum continues to turn the crankshaft and compress air inside the engine's cylinders. When the crankshaft passes the top-dead-center position the compressed air in the cylinder acts as a spring and pushes the piston back down the cylinder, returning the energy to the crankshaft and pushing the truck forward. Little of the energy absorbed by compressing the air is lost, so the engine does not effectively aid in slowing the truck. In a gasoline engine, some engine braking is provided during closed-throttle operation due to the work required to maintain intake manifold vacuum. Diesel engines, however, are unthrottled and hence do not provide engine braking from throttling losses. A compression release engine brake uses an extra lobe on the camshaft to open a second exhaust valve at the top of the compression stroke. The stem of this valve telescopes during normal operation so the valve remains closed, but is locked at full length by a solenoid when the engine brake is engaged so that the valve opens as directed by the cam. This releases the compressed air in the cylinder preventing it from returning its energy back to the piston and accordingly, the vehicle.
The driver controls consist of an on/off switch and, sometimes, a multi-position switch that controls the number of cylinders which the brake is active on. When the compression release engine brake is turned on, it will activate when the driver releases the accelerator. There are also switches on the clutch and accelerator pedals that will deactivate the compression brake when the clutch is disengaged or the accelerator is pressed.
Compression release engine brakes may make a loud chattering or machine gun noise while being used, which has led many communities to ban them. There are signs on the side of some freeway offramps, or at municipal boundaries, that will say "No jake braking", "Engine brakes restricted", etc. These signs are referring to compression release engine brakes. This has led to special mufflers on trucks that also muffle the sound of the compression release engine brake. Also, some engines use a butterfly valve in the exhaust and/or stator travel beyond the normal operating range on the variable-geometry turbocharger to produce engine braking without the noise associated with a compression release engine brake.
Post Fiend
Joined: Sep 2006
Posts: 6,634
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From: bricktown NJ
A lot of our up scale residental towns have laws enforced by state police d.o.t no jake braking $500.00 fine.gotta love the sound of a c15 550hp cat 3 stage jake.
Last edited by 350steve; May 7, 2007 at 07:28 PM.
Post Fiend
Joined: Jul 2005
Posts: 8,462
Likes: 4
From: Durant, OK (SOSU)
Noticed a town...wish I could remember which one it was, somewhere between Quanah, TX and Wichita Falls, TX that has a steep grade and that sign sitting at the top and bottom. Idiots...not a house for half a mile.
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RubberDuck
1994.5 - 1997 7.3L Power Stroke Diesel
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Jul 29, 2010 05:44 PM
