Auto Tech Quiz Game!

  • Thread starter Troux
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Troux
There really isn't any benefit to retarding ignition, it's entirely a safety measure.
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I don't know if you meant generally or in that instance, but there can be benefits since anti-lag systems temporarily retard ignition.
 
From what I understand, in all instances. Lower thermal efficiency and less-then-ideal crank angle for ignition, as well as a couple other factors.

I would have also guessed voltage.
 
retsmah
The ECU does monitor the air fuel ratio using the oxygen sensor voltage.

My understanding of what you are getting at with the second part of that question: The narrow band oxygen sensors in cars don't give a good indication of what the air fuel ratio is, just whether it is rich or lean. So the ECU adds fuel when it's lean and takes it away when it's rich... the result is that the air fuel ratio oscillates between slightly rich and slightly lean. A bad oxygen sensor can begin to react slowly to changes in the air fuel ratio, meaning those oscillations become longer than they should be. The ECU does not use the oscillation in voltage to tell if the mixture is rich or lean, but it can be used to detect a bad oxygen sensor.

That's my understanding of it anyway.
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And the oscillations are called....crosscounts. Thats what I was looking for.

The ECU is not reading a voltage and putting it in a formula, it thresholds the voltage and reads it as a single bit indicating either rich or lean. So by my interpretation it is also monitoring these oscillations because it has no information about the exact value of the A/F mixture. By my understanding anyways. I could be wrong, you could be right--thats just how it was explained to me.

Go ahead retsmah. 👍
 
Open diff is right.

Wasn't sure if that would be difficult or not :) As most people know the open diff will send most of it's POWER to one wheel when it begins spinning. However, it always sends equal TORQUE to both wheels.
 
Whoops sorry guys I was out of town until this morning and I forgot!

...and I have no idea what the answer to opendriver's question is.
 
Opendriver, are you saying that this is direct-drive?


(Is it some sort of entry from the "What can you Hemi" contest?)
 
A dirt sprint car. Maybe?

Edit: Got called for a job tomorrow, so if I'm right, let Skip go, since he "skipped' his before. . . .
 
OK. This is easy if you're old enough. Who (what company) built the Ford GT-40s of '60s LeMans fame?
 
Definitely NOT Ferrari. Henry Ford had the project started specifically to beat Ferrari at LeMans when Enzo backed out of a deal to sell Ferrari to Ford.

Not Shelby, either.
 

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