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Chevrolet Suburban Active Fuel Management

26 messages,  Last post on Jul 11, 2008 at 11:56 PM

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#24 of 26 Re: Does Active Fuel Management inprove MPG [kiawah] by arrie Jul 11, 2008 (2:12 pm)
Replying to: kiawah (Jul 10, 2008 1:33 pm) I am afraid I have to take back my promise of the last post as I feel I need to post this after seeing how lost you are with the torque (power) curve.   First I need to correct my statement that the 4-cyl mode does not provide a new torque curve. Of course it does as the torque roughly is half of the 8-cyl mode at given rpm but what I mean is it does not provide a useful additional torque curve and I stay behind that. The only way 4-cyl mode could be helpful is that if it would take the 4-cyl mode every time the power requirement from the engine allows to do so. From what I have learned about it this is not how it works.   Now about the torque curve. The engine does not produce torque (and power) by the curve when you normally drive the car. It only produces it when you pull the maximum torque from the engine, i.e. THE TORQUE CURVE ILLUSTRATES MAXIMUM TORQUE OUTPUT THAT THE ENGINE CAN PRODUCE WITH CORRESPONDING ENGINE REVOLUTION IN THE CHART!   When you normally drive say that 60 mph speed the engine provides exactly that amount of torque (and power) to keep the car going that speed. If it would provide more than is required the car's speed would increase unless you step on brake pedal or other vice cause more "friction" for the engine to work against. The engine does not provide the torque (power) what the torque chart shows for that engine rpm unless the engine's performance is on the max limit for that engine rpm.   Seems like you were a perfect customer to buy one of these AFM hoax vehicles.   ...lol...   This was my last post on this topic with you.   Arrie Replies to this message: kiawah (Jul 11, 2008 4:14 pm) tidester (Jul 11, 2008 11:56 pm)
#25 of 26 Re: Does Active Fuel Management inprove MPG [arrie] by kiawah Jul 11, 2008 (4:14 pm)
Replying to: arrie (Jul 11, 2008 2:12 pm) Arrie,   I found this reference for you if you'd like to read up on the theory of how Automobile Engines work. It's a little long and detailed for easy casual reading, but it covers the physics at work in an automobile internal combustion engine.   Physics in an Automobile Engine Replies to this message: tidester (Jul 11, 2008 11:56 pm)
#26 of 26 Re: Does Active Fuel Management inprove MPG [kiawah] by tidester HOST Jul 11, 2008 (11:56 pm)
Replying to: kiawah (Jul 11, 2008 4:14 pm) I like this one: The Isaac Newton School of Driving: Physics & Your Car   This one's an easy read. It's written by Barry Parker, a physics teacher at one of our local colleges.   tidester, host SUVs and Smart Shopper

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