[TheForge] pneumatic tools and pneumatic tool oil

[Harry Wise]

Compression is not a side issue in diesel engine as I understand it. Adiabatic compression is the ignition mechanism. When a gas is compressed it gets hotter. If that temperature exceeds the autoignition temperatures the fuel/air mix then you get combustion. Of course in a hydraulic system you have liquids which do not really compress so you do not get the heat build up. And like you said Bruce, there is no oxidizer in the hydronic system. Lets hope there is not anyway.

Harry Wise
Huntsville AL


> On Jul 22, 2016, at 7:37 AM, Bruce . <freemab222 at gmail.com> wrote:
> 
> See my responses inserted below.
> 
> Bruce
> NJ
> 
> On Thu, Jul 21, 2016 at 11:22 PM, terry l. ridder <terrylr at blauedonau.com>
> wrote:
> 
>> hello
>> 
>> while working on the truck with the impact tool, a question popped into
>> my mind. Wh
>> ​y does not the oil in an pneumatic tool, "diesel", i.e.
>> combust. there is compression and there is oil. I use mineral oil so I
>> am not entirely sure what conditions would have to be for mineral oil to
>> "diesel". I would not want to try diesel fuel or keresine.
>> 
> 
> ​Because you don't have a proper fuel-to-air ratio to support combustion.
> There would be little or no air​
> 
> ​inside a hydraulic system, as air bubbles would defeat the purpose. Also,
> it's unlikely there'd be a source of ignition in any event.
> 
> Compression is a side issue.  Compression is no​t inherently needed to
> support combustion.  It's needed to support engine operation, and, in a
> Diesel engine, forms part of the ignition process.  It also may change the
> ignition characteristics of a given fuel-to-air mix, but that's also a side
> issue w/ Re: hydraulic systems.