Egon
Epic Contributor
The chances of a compression releif stopping a diesel being fed lots of combustible vapours is pretty slim.
Egon /forums/images/graemlins/grin.gif
Egon /forums/images/graemlins/grin.gif
Gas Line
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kubotaman68
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it was not from natural gas it was from the throttle going by the stop and running away but you are right once they get a whiff of gas they are history
Soundguy
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<font color="blue"> Wouldn't a compression release lever stop a runaway engine? I have one on my Yanmar marine diesel as it is the normal way to stop the engine. If so, why don't more tractors have the simple compression release systems?
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You must hate that thing huh? /forums/images/graemlins/confused.gif... Kinda like beating a child to make it stop crying... they both work.. but not the best way to go about acheiving the desired results.... I've never heard of using comp release as the 'usual' way to stop a diesel.. rather fuel stop valves.. etc... All my diesels have printed in the manual that using comp release to kill the engine will... kill the engine... as it washes the cyls down with unburnt fuel.. this reduces lube on cyl walls.. and leads to fuel dilution of crankcase oil.. lowering lube in the whole engine...
Guess yours could be some special case.. but sounds alien to me.. unless for emergency.. etc..
Soundguy
</font>
You must hate that thing huh? /forums/images/graemlins/confused.gif... Kinda like beating a child to make it stop crying... they both work.. but not the best way to go about acheiving the desired results.... I've never heard of using comp release as the 'usual' way to stop a diesel.. rather fuel stop valves.. etc... All my diesels have printed in the manual that using comp release to kill the engine will... kill the engine... as it washes the cyls down with unburnt fuel.. this reduces lube on cyl walls.. and leads to fuel dilution of crankcase oil.. lowering lube in the whole engine...
Guess yours could be some special case.. but sounds alien to me.. unless for emergency.. etc..
Soundguy
Soundguy
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</font><font color="blue" class="small">( The chances of a compression releif stopping a diesel being fed lots of combustible vapours is pretty slim. )</font>
Why? Even if the fuel simply 'cooks' off from the heat.. with the valves lifted open.. there won't be compression for that compression engine to fire with.. If the fuel-air charge cooke doff.. the path of least ressitance is the open valve.. not the piston???
Soundguy
Why? Even if the fuel simply 'cooks' off from the heat.. with the valves lifted open.. there won't be compression for that compression engine to fire with.. If the fuel-air charge cooke doff.. the path of least ressitance is the open valve.. not the piston???
Soundguy
SnowRidge
Elite Member
I watched mechanics trying to stop a run away diesel when I was in the military. They tried everything, including the compression release. Nothing worked. The engine lunched itself.
Egon
Epic Contributor
Easiest way is to find out is to try it! /forums/images/graemlins/grin.gif
Get the diesel warmed up, Open up a propane bottle into the the air intake and then pull the compression realease.
Let us know what happened! /forums/images/graemlins/grin.gif
Egon /forums/images/graemlins/grin.gif
Get the diesel warmed up, Open up a propane bottle into the the air intake and then pull the compression realease.
Let us know what happened! /forums/images/graemlins/grin.gif
Egon /forums/images/graemlins/grin.gif
markct
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</font><font color="blue" class="small">( Usually when a diesel "Runs Away" from exlosive vapours in the air it's to late for the engine and operator! )</font>
i have to dissagree, i have seen diesels rev up very high, not totaly run away, but increase rpms very fast, from just a little bit of brake cleaner used nearby, i think that on a concentration that would cause no imediate harm to the operator that the engine would still breath alot in
i have to dissagree, i have seen diesels rev up very high, not totaly run away, but increase rpms very fast, from just a little bit of brake cleaner used nearby, i think that on a concentration that would cause no imediate harm to the operator that the engine would still breath alot in
Egon
Epic Contributor
Sorry about the lack of proper information.
I was refering to a situation in which there is a lot of combustible vapour; such as in when a natural gas line is hit. In these cases there is often a big bang associated as the vapour cloud explodes. This has happened more than one or two times. Other times a motorized unit may drive into a vapour cloud from a leaking line or ?? Lots of other type senarios.
Egon /forums/images/graemlins/grin.gif
I was refering to a situation in which there is a lot of combustible vapour; such as in when a natural gas line is hit. In these cases there is often a big bang associated as the vapour cloud explodes. This has happened more than one or two times. Other times a motorized unit may drive into a vapour cloud from a leaking line or ?? Lots of other type senarios.
Egon /forums/images/graemlins/grin.gif
