Comments on: Past as Prologue: The Detroit Edition http://www.howwedrive.com/2009/04/27/past-as-prologue-the-detroit-edition/ Just another WordPress weblog Mon, 21 May 2012 20:15:14 +0000 http://wordpress.org/?v=2.5.1 By: aaron http://www.howwedrive.com/2009/04/27/past-as-prologue-the-detroit-edition/#comment-7120 aaron Tue, 28 Apr 2009 19:55:41 +0000 http://www.howwedrive.com/?p=834#comment-7120 Key there is <b>braking</b> and also highways speeds. Key there is braking and also highways speeds.

]]> By: Daniel http://www.howwedrive.com/2009/04/27/past-as-prologue-the-detroit-edition/#comment-7118 Daniel Tue, 28 Apr 2009 18:17:34 +0000 http://www.howwedrive.com/?p=834#comment-7118 Oh-oh. Someone wants to make a point. Interestingly, the first paragraph of the very "page 5" reads as follow: "<I>Aggressive driving (speeding and rapid acceleration and braking) can lower your gas mileage by as much as 33% at highway speeds and 5% around town.</I>" So much for "Fast acceleration is better". Oh-oh. Someone wants to make a point.

Interestingly, the first paragraph of the very “page 5″ reads as follow: “Aggressive driving (speeding and rapid acceleration and braking) can lower your gas mileage by as much as 33% at highway speeds and 5% around town.” So much for “Fast acceleration is better”.

]]> By: aaron http://www.howwedrive.com/2009/04/27/past-as-prologue-the-detroit-edition/#comment-7096 aaron Mon, 27 Apr 2009 23:26:14 +0000 http://www.howwedrive.com/?p=834#comment-7096 (That's not a criticism of the EPA testing, it's a criticism of the way we drive.) (That’s not a criticism of the EPA testing, it’s a criticism of the way we drive.)

]]> By: aaron http://www.howwedrive.com/2009/04/27/past-as-prologue-the-detroit-edition/#comment-7095 aaron Mon, 27 Apr 2009 23:21:44 +0000 http://www.howwedrive.com/?p=834#comment-7095 <i>"<a href="http://autospeed.com/cms/gallery/article.html?slideshow=0&a=110216&i=10" rel="nofollow">And now we have the killer</a>. Here each dot shows the speed and load for a typical mid size car at 1 second intervals during the US fuel economy test. <b>Of the time the car takes to do the test, just 5 seconds are in the island of best BSFC</b>. Quite a few of the dots (the authors say that they overlay) are at worst BSFC – idling at zero load with the car stationary!"</i> “And now we have the killer. Here each dot shows the speed and load for a typical mid size car at 1 second intervals during the US fuel economy test. Of the time the car takes to do the test, just 5 seconds are in the island of best BSFC. Quite a few of the dots (the authors say that they overlay) are at worst BSFC – idling at zero load with the car stationary!”

]]> By: aaron http://www.howwedrive.com/2009/04/27/past-as-prologue-the-detroit-edition/#comment-7094 aaron Mon, 27 Apr 2009 22:39:16 +0000 http://www.howwedrive.com/?p=834#comment-7094 <a href="http://cumulativemodel.blogspot.com/2009/04/vehicle-miles-travel-per-gallon-of.html" rel="nofollow">More fuel efficient cars don't mean a damn if we continue to give people bad information on how to drive and mis-manage traffic</a>. <a href="http://autospeed.com/cms/title_Brake-Specific-Fuel-Consumption/A_110216/article.html" rel="nofollow">Fast acceleration is better</a>. Below 55mph, <a href="http://www.fueleconomy.gov/feg/FEG2009.pdf" rel="nofollow">higher cruising speeds are more efficient</a> (see graph, page 5). And slow acceleration decreases throughput at lights. More fuel efficient cars don’t mean a damn if we continue to give people bad information on how to drive and mis-manage traffic.

Fast acceleration is better. Below 55mph, higher cruising speeds are more efficient (see graph, page 5).

And slow acceleration decreases throughput at lights.

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