mastic wrote:
"MJC" wrote:


"Andrew P." wrote in message
link.net...
Wandering aimlessly about the Web, I heard Sport Pilot say:
You have most of it right. Some things you have wrong,

1. Desiel injection timing is differant than on an Otto engine. The
fuel is injected during the intake cycle on the Otto engine and the
fuel is injected during the ignition cycle on the Desiel. On the
Desiel the fuel injection cycle starts just before TDC and ends well
after TDC. The fuel ignites as soon as it hits the hot air.

etc., etc. --- SNIP ---

It's Diesel, not "Desiel".

--
Andrew P.

Well if you're going to get picky, it's "Auto" engine, not "Otto" engine.

MJC

Picky, picky, picky. It's not an Otto engine as such. Otto is used to
refer to the standard four stroke cycle because Otto was good enough
to invent the four stroke cycle.
So our friend was incorrect when he said:

1. Desiel injection timing is differant than on an Otto engine. The
fuel is injected during the intake cycle on the Otto engine and the
fuel is injected during the ignition cycle on the Desiel.

An Otto engine is any four stroke engine, diesel, gasoline, LPG makes
no difference.

Completely wrong, the Otto cycle has nothing to do with four stroke
engines. Don is right its not four cycle, I used it incorrectly. The
Otto and Diesel cycles are actually refering to the thermodynamics
chart of temperature pressure and volume, they invented their cycles on
paper and books, the engines we use are only close approximations. The
two stroke ignition engine uses the Otto cycle as it is has the four
phases of intake, compression, power, and exhaust, and the pressure is
not constant. The Diesel two stroke is a Diesel cycle because it also
includes the same phases and the fuel burns at a fairly constant
pressure.