Pulse & Glide vs maintaining constant speed
Hello everyone, this is my first post.
I own a 2010 1.8L AT Chevy Cruze. I'm new to hyper-milling so i wanted to know what would be more efficient? a) Accelerating to say 60 mph and gliding to 45 or 50 mph without shifting to Neutral (i don't want to wear out the transmission) OR b) Maintaining a constant speed of 60 mph Thanks :) |
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Welcome to ecomodder.
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That is, if the transmission doesn't have a coasting feature built in. |
I think pulse and glide with an AT is really tricky, especially without an engine load readout. The car will want to switch gears when you try for an 80% load pulse, no? What I do with an AT is steady-state cruising. I only use neutral when cresting hills, because being in gear would slow the car excessively. I do a lot of engine braking, shifting to a higher gear if the selector allows it so that I can get full advantage of the deceleration fuel cut-off mode.
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When I drive my wifes automatic suv, I usually coast in gear at hills, going down I accelerate, up I use little to no throttle. I know some people exercise the right to drive as slow as they want, but out here people are crazy. So I let myself drop to the speed limit, or a few under, and then just mainain until the next hill. speeding, I speed as much as possible without getting a ticket, so when I come to a hill, I have room to drop.
In older cars, it was way more efficient to coast in nuetral than in gear, but it seems that is not exactly 100% confirmed anymore. Not getting into a heated debate, but now a days autos typically are rated higher than standards, so surely there are improvements or changes going on. I can't help but wonder what M C thinks when he says "I Have an auto trans, help me" amd the first response is "press the clutch" lol |
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Honda Insight Example
Hi,
I have a 2000 MT Honda Insight, and it's no contest on which method gives better mileage, with the following conditions: Use this technique only on backroads Average speed is 35 mph or less Ambient outside temp is 90F or above No wind, and flat roads The Honda engine has lean burn capability at low throttle settings Straight-line driving: max mpg is 120 or so, at 35 mph P&G; 35 to 15 mph: max mpg is over 150 (pegs display) Universities use this same P&G method to achieve mpg readings of over 2000 and higher. Slow speeds and lot's of engine off coasting. Hope this helps, Jim. |
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