Easy quiz for my diesel friends.
 

Closed book and no Google. Also you must only post your reply if you can answer (or guess :-) both of them in 1 minute.

1) What are the other names for Spark Ignition and Compression Ignition?

2) In what year did DBAG make its first PASSENGER diesel car? and what was its model name?

Good luck.

Eric

1. otto cycle ?

Sixto, It is closed book no google... I am guessing.....that was my only thought....

I don't think Diesels use the Otto cyle. I think there's a distinct Diesel cycle in the thermodynamic world.

There was a recent thread with pictures of the 1936 260D.

[edit] Sorry, the threads about a 1938 260D.

Sixto
95 S420
91 300SE
87 300SDL
83 300SD

C'mon friends. Nobody has correct answers for my 2 questions?

I will give the answers on Monday after July 4/03

Eric

Make us wait until monday????

Makes me want to jump ship like Herr Diesel (obscure reference!).

Klaus.....

Sixto,

Some Diesels use the Otto Cycle, some don't. Otto cycle is just another name for 4 cycle, the guy that invented it. Up untill that time, all the engines were 2 cycle.

Ever hear of an 8 cycle engine?

P E H

PEH, I have heard of " hit and miss" engines... is that what that means? hit one cycle and miss the next ? :D I think they are used on pumps.. the old one lung /huge flywheel...

Leather,

You are close. There was a one cylinder 8 cycle engine made that was simalar to the old hit and miss engines, but it fired every 4 revolutions instead of 2 revolutions like a 4 cycle does.

The extra 4 revolutions were used for cooling as the exhaust valve was open and cool air was going into the engine absorbing heat and being exhausted.

The hit and miss engines did not have a variable carbureator so they kept the exhaust valve open when ever the engine speed was above the governed speed. When the speed of the engine dropped below the governed speed, the exhaust valve was closed. The vacuum created by the intake stroke caused atmospheric pressure to overide the intake valve spring force and the intake valve opened allowing gasoline and air to be taken into the cylinder and subsequently compressed and fired. Thus the amount that these engines fired and missed was variable depending on the load placed on the engine.

P E H

Cool, Thanks for explaining that... had wondered a long time...

Hit miss engine
 

Then I guess the Northstar engine can go into a hit and miss mode if needed. From the northstar engine site...

"Limp-Home" Mode
Intrinsic to the Northstar System's personal safety and engine protection is the exclusive, patented "limp- home" mode, which enables the engine to keep operating - for a limited range - even without a drop of vital engine coolant. If for any reason there is a significant loss of coolant that causes the engine to overheat, the Northstar automatically converts to this limp-home mode, alternately delivering fuel to only four of the eight cylinders. The remaining four cylinders do not fire, but continue to pump air. This air, which is pumped through the cylinder, cools the engine and gives the driver an opportunity to reach a safe location.

Leather,

Maytag used to build gasoline engines for their washing machines. There were both 1 and 2 cylinder models, both 2 cycle. They actually switched the ignition off and on to control the engine speed since there were no valves in the 2 cycle engine.

Very inefficient engine design but those farm wifes were so glad to have a washing machine that was much more efficient than a wash board even if the engine wasn't.

P E H

Dear friends:

OK, here are the correct answers:

1) What are the other names for Spark Ignition and Compression Ignition?

Spark Ignition = Otto cycle (Inventor : Nicklaus Otto)
Compression Ignition = Diesel cycle (Inventor : Rudolf Diesel)

2) In what year did DBAG make its first PASSENGER diesel car? and what was its model name?

DBAG (e.g. DaimlerBenz AG) made the world's first diesel PASSENDGER car – Mercedes Dieselwagen 260 D - in 1936.


BTW, Mespe: 1896 was the year when Rudolf Diesel officially put
his "Rational Heat Engine" (aka Diesel engine) into commercial production. Rudolf Diesel died in 1913 on his way to UK to become a diesel engine consultant. He might be assassinated because the Germans did not want him to spread his diesel engine knowledge to other nations. BTW, He was born and educated in France.

Read my new quiz for more "cycles" stuff :-)

Eric