Subject: The Andrea Gail had a gasoline engine
From: "Steve Daniels, Seek of Spam"


BTW, I seem to remember an old CAT tractor whose engine started as a
gasoline
engine, and when warmed up, converted to diesel....could be wrong.

There are some old tractors that use a gasoline engine as a
starter motor. You'd start the gasoline engine and then couple
its output through a clutch to turn the diesel engine, getting it
to start. I guess that was because they didn't carry enough
electrical power to use an electric motor to turn the diesel, or
maybe they did it that way because it's Just Cool.


I've seen what you are mentioning above, but for some reason, I remember this
as the main engine was started on and as a gasoline engine, then switched.
It was an old Cat dozer, and as stated previously, I could be wrong.

Shen

On 10 Jul 2004 18:27:18 GMT, something compelled
(Shen44), to say:

Subject: The Andrea Gail had a gasoline engine
From: "Steve Daniels, Seek of Spam"


BTW, I seem to remember an old CAT tractor whose engine started as a
gasoline
engine, and when warmed up, converted to diesel....could be wrong.

There are some old tractors that use a gasoline engine as a
starter motor. You'd start the gasoline engine and then couple
its output through a clutch to turn the diesel engine, getting it
to start. I guess that was because they didn't carry enough
electrical power to use an electric motor to turn the diesel, or
maybe they did it that way because it's Just Cool.


I've seen what you are mentioning above, but for some reason, I remember this
as the main engine was started on and as a gasoline engine, then switched.
It was an old Cat dozer, and as stated previously, I could be wrong.

A diesel engine has a much higher compression ratio than does a
gasoline engine. Not only does this make the diesel more
efficient, but it's what drives the ignition stroke. The
compression stroke on a diesel compresses air, and the diesel oil
is injected at the top of the stroke. The compressed air is so
hot it ignites the oil, providing power.

If you injected gasoline into that environment, you'd get
detonation so serious it would probably destroy the engine.

he
compression stroke on a diesel compresses air,

it does on a gas engine, too.

The compressed air is so
hot it ignites the oil, providing power.

it is doens't ignite, no power of course.

If you injected gasoline into that environment,

multi-fuel engine don't work that way.

you'd get
detonation so serious it would probably destroy the engine.

the problem on a multi-fuel engine is the low compression ration.

(JAXAshby) wrote in message
the problem on a multi-fuel engine is the low compression ration.

Huh? how DO they ration the compression?

variable piston size? (big grin)

the problem on a multi-fuel engine is the low compression ration.

Huh? how DO they ration the compression?