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Forum: Diesel Discussion

04-29-2008, 08:06 AM

Replies: 39

searching for MPG's

Views: 2,825

Posted By Brian Carlton

There is no "switch" to allow the governor to...

There is no "switch" to allow the governor to realize that it's at idle fuel. It must be done with linkages and cams and only activate when the fuel is at a dead idle.

If you were an engineer,...

Forum: Diesel Discussion

04-28-2008, 07:20 PM

Replies: 39

searching for MPG's

Views: 2,825

Posted By Brian Carlton

Well, I might dispute the "can easily" part of...

Well, I might dispute the "can easily" part of that statement, if it actually proves to be true.

That would be quite a feat of engineering for a mechanical device. It's just a bunch of springs...

Forum: Diesel Discussion

04-28-2008, 06:51 PM

Replies: 39

searching for MPG's

Views: 2,825

Posted By Brian Carlton

Yes, I had the W123 stall once myself. It...

Yes, I had the W123 stall once myself. It doesn't signify a generic problem.

No, the 500 rpm drop will occur regardless of whether the fuel is at idle or whether it's completely shutoff.

Forum: Diesel Discussion

04-28-2008, 06:45 PM

Replies: 39

searching for MPG's

Views: 2,825

Posted By Brian Carlton

That's the torque converter slippage. It has...

That's the torque converter slippage. It has transitioned from a higher engine speed that drives the wheels to a lower engine speed whereby the wheels drive the engine.

When both the impeller...

Forum: Diesel Discussion

04-28-2008, 06:43 PM

Replies: 39

searching for MPG's

Views: 2,825

Posted By Brian Carlton

That's the question. I'd really like to see...

That's the question.

I'd really like to see how the governor can shut the fuel completely and then turn it back on just as the engine reaches idle. This is the purvey of electronic controls. I'd...

Forum: Diesel Discussion

04-28-2008, 06:15 PM

Replies: 39

searching for MPG's

Views: 2,825

Posted By Brian Carlton

I do not believe a mechanical governor has the...

I do not believe a mechanical governor has the ability to shutoff the fuel from the simple inputs of throttle and speed.

I'd be interested to see where you found such info.

Forum: Diesel Discussion

04-28-2008, 05:49 PM

Replies: 39

searching for MPG's

Views: 2,825

Posted By Brian Carlton

Actually not. They seem to need to select a...

Actually not. They seem to need to select a lower gear and then instantly realize that an upshift is required. The transmission seems confused.

Forum: Diesel Discussion

04-28-2008, 04:56 PM

Replies: 39

searching for MPG's

Views: 2,825

Posted By Brian Carlton

You're a bit confused on the function of the...

You're a bit confused on the function of the ALDA. It's a fuel limiting device. At low rpm levels, where there is insufficient boost, the ALDA limits fuel so the engine does not smoke. If the...

Forum: Diesel Discussion

04-28-2008, 01:25 PM

Replies: 39

searching for MPG's

Views: 2,825

Posted By Brian Carlton

Going into neutral at any speed is fine. ...

Going into neutral at any speed is fine.

What they don't like, whatsoever, is going into gear at any speed other than zero. So, going to neutral is not the best thing if you must return to gear...

Forum: Diesel Discussion

04-28-2008, 10:37 AM

Replies: 39

searching for MPG's

Views: 2,825

Posted By Brian Carlton

That would be an interesting bit of engineering. ...

That would be an interesting bit of engineering. The governor has some input to whether the vehicle is accelerating or decelerating at 1000 rpm? And, just how would it know that?

Forum: Diesel Discussion

04-28-2008, 10:01 AM

Replies: 39

searching for MPG's

Views: 2,825

Posted By Brian Carlton

On these older vehicles.........there is nothing...

On these older vehicles.........there is nothing to shut down the fuel. So, you get idle fuel quantity at all rpm's. The higher the rpm, the more idle fuel is consumed (more combustion events per...

Forum: Diesel Discussion

04-28-2008, 09:40 AM

Replies: 39

searching for MPG's

Views: 2,825

Posted By Brian Carlton

Your practice of coasting in neutral will yield...

Your practice of coasting in neutral will yield better fuel economy than maintaining a steady speed by carefully feathering in gear. Although it's a small benefit, the engine gets better fuel...

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