Coasting?

***Glad you asked for advice before coming to the conclusion that "coasting" is ok***

 

The difference between the west and the east is out here we have LOOONNG hills, some are steep some are not, but they are LOOOONNG...

Most east coast hills are not more than 5 - 10 miles long. You can still get in trouble on a 10 mile long hill but its not the kind of trouble we see on those 30 mile long hills. I hear all the time on the radio "does this hill EVER end"? My answer is usually "yes, in Oklahoma".

 

some facts about 'Coasting' regaurding some of the newer trucks...
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Detroit DD15 engines are usually programmed to go into long-idle after a set time (usually 2 minutes). Coasting down a long hill, if your dd15 goes into long idle, it will cause an error and render the accelerator pedal useless. This means that you will NOT get the truck back into gear and re-gain accelerator cotroll until you come to a stop, shut the truck off, then re-start it. I have actually tested this first hand. Long idle can be prevented by holding the engine at 1000+ rpm during the coast, but is annoying and distractive.

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Cummins engines (even the older ones), after several minutes of 'Coasting' will do something different. They will allow you to rev the engine and get it back into gear, but will refuse to provide any torque for several seconds after the transition. Can be very annoying if you 'coasted' between 2 hills and now need power to keep speed up while passing someone.

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Qualcom units DO have a recorded total of 'OOG', Out Of Gear hours on them. Your copany can monitor this setting live.

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The ECM reports this data freely over its data link, but Internal records inside the ECM can be wiped, and/or even switched off for this to allow for automatic transmissions to coast the truck.

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Just some facts... Rawze.

 

That makes a lot of sense. I was picturing a driver using this system coming down a steep grade (Floyd Hill, Mt. Vernon Canyon, either side of the Eisenhower/Johnson tunnel near Denver, etc.). Tranny reengages, engine brakes applied (to the tractor), trailer has a mind of its own and that's all she wrote.

 

I coasted again today...OMG the sky is falling,it is NOT SAFE...Someone save meeeeeeeeeeeeeeeee...

 

lolz...

My Qualcomm shows 391 hours of OOG. Top gear is at 4% last 96,000 miles, and cruise is at 0.3%. Carrier asked me aout it once, I replied,...'Maybe bad transmission wiring. See there,.. it shows my cruise isn't working most of the time either.'. and their mechanic said.,...Well, it just makes sense then. I told them I'll Just fix the wiring whenever I got a chance. That was a year ago.

 

I Coast In Wyoming, Can Coast For Miles.

 

There are those that follow the rules and those that think they are above the rules. The DOT wants you to come in and write the new rules for next year!

 

it was me and i was talking about my volvo with the ishift and eco roll. happy trails

 

the newer technologies in the ishift and the mack m shift are set up for eco rolling the tranny is never put into neutral by the driver , the ecu determines when the truck can roll. example; i set my cruise control at 55mph, then i set my jake at 60mph. as the truck rolls up to 57 mph the tranny kicks to neutral and the engine idles and the the truck coasts. when the truck hits 60mph the engine revs come up and the tranny engages and the jake will engage at stage one, if more jake is needed it will engage phase two or three to keep the truck from rolling past 60mph [automatic proggresive engine brake] when the speed is lower than 60mph the jake kicks off and the truck continues to coast untill it hits 55mph then the coast event is over and the cruise control resumes. this is a great system i am having alot of fun with it, i hope my explanation of this helps. happy trails