05-06-2013, 03:27 PM
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#21 (permalink)
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Master EcoModder
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No wonder Diesels are fitted with supplementary engine-braking devices.
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Compression release engine brake - Wikipedia, the free encyclopedia
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The name [Jake Brake]is derived from the manufacturer, Jacobs (of drill chuck fame), and was patented 1962–1965 by Clessie Cummins.
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05-06-2013, 03:40 PM
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#22 (permalink)
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Corporate imperialist
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Smaller diesels do not have a jake brake.
Newer diesels with VGT will use the turbo charger to act as a exhaust restriction brake.
My HE351VE turbocharger has this ability but I locked it out because I have no intrest in exhaust braking.
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1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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05-06-2013, 07:57 PM
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#23 (permalink)
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Master EcoModder
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I respect that.
That kid (not I), who'd just graduated high school and was driving truckloads of grain past it in the 60s, sure did.  |
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05-07-2013, 01:12 AM
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#24 (permalink)
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It's all about Diesel
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Quote:
Originally Posted by oil pan 4
Smaller diesels do not have a jake brake.
Newer diesels with VGT will use the turbo charger to act as a exhaust restriction brake.
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Even without a VGT, it's not impossible to fit an exhaust-brake in a smaller Diesel engine, and since it's cheaper than a Jake-Brake it's also widely used in heavy truck engines in overseas markets. |
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05-07-2013, 02:27 AM
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#25 (permalink)
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Corporate imperialist
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Old school flapper valve exhaust brakes were responsible for lots of blown head gaskets in the 70s and 80s.
I am going to avoid anything like that.
__________________
1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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05-07-2013, 11:36 PM
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#26 (permalink)
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It's all about Diesel
Join Date: Oct 2012
Location: Porto Alegre, Rio Grande do Sul, Brazil
Posts: 12,873
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Thanked 1,684 Times in 1,502 Posts
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Quote:
Originally Posted by oil pan 4
Old school flapper valve exhaust brakes were responsible for lots of blown head gaskets in the 70s and 80s.
I am going to avoid anything like that.
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They're still widely used back here and no problem at all, altough nowadays transmission-mounted braking retarders are getting more popular in heavier vehicles.
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