[Shop-talk] Coast in Neutral -the next great debate- one final thought

[DAVID MASSEY]

 Big trucks have a device called a Jake Brake that increases the normal compression braking.
Here is s snip from this website:  https://www.truckingtruth.com/wiki/topic-91/jake-brake

It is a separate component installed on diesel engines, that when engaged, releases stored, compressed air from the cylinder at the top of the piston's stroke, preventing it from from returning it's energy to the crankshaft and powering the down-stroke, and slowing the vehicle as the air is compressed.
When engaged they produce an objectionable amount of noise which is why they are banned in some residential areas.  But they are effective in reducing the amount of brake use and an 18-wheeler has 10 sets of brakes so...
 
Dave 


 
 
-----Original Message-----
From: John Innis <jdinnis at gmail.com>
To: eric at megageek.com
Cc: Shop-talk at autox.team.net
Sent: Tue, Dec 13, 2022 5:34 pm
Subject: Re: [Shop-talk] Coast in Neutral -the next great debate- one final thought

Not sure if you tell with a car, but a big truck you can hear the difference.  Even without using a compression brake they do make some noise when going down hill in gear.  There is a long gentle hill coming into town not far from where I live.  It always seems the commercial vehicle enforcement cars (aka Diesel cops) are staked out there around harvest time.

On Tue, Dec 13, 2022 at 2:59 PM <eric at megageek.com> wrote:

Thanks for everyonethat gave me input.

My only questionis, How would a cop know you are coasting?

I mean, I wasa cop and never thought about it.

Any ideas?

Moose_______________________________________________

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