Quote:
Originally Posted by bikenfool
DWL implies constant load on the descent, in other words using the engine to increase speed. It's obvious gliding is best.
|
When I read what you wrote, it seems to me that you are under the impression that a hypermiler sticks to exactly one technique no matter what the condition. What you seem to be trying to say is that when the hypermiler crests the hill, he (or she) will press on the accelerator to maintain a specific load ... when legal speed is reached, the hypermiler will continue to press on the accelerator to maintain that specific load ... when a sharp curve is approaching, the hypermiler will continue to press on the accelerator to maintain that specific load ... no, that's just silly. The hypermiler will do what he or she knows how to do or is able to do which fits the current conditions. That means DWL up the hill if that's appropriate for the conditions and then switching to a different (appropriate) technique (e.g. coasting, engine on or off, in gear or out of gear) when going down the hill. This "switching of tactics" does not violate the description of DWL given on this site. You can read whatever you want into it, but apply some logic to your assumptions.
Quote:
Originally Posted by bikenfool
I know you'd be using more fuel, but going uphill & keeping the speed up would usually be more efficient.
|
Please explain your reasoning here. How will using more fuel per mile on the uphill get you better fuel economy, keeping in mind that you know you have a downhill once you've climbed the uphill? In your scenario, how would you maintain your speed within legal limits on the downhill? Engine braking? Brakes? Somehow, the net amount of fuel consumed on the uphill, downhill combination needs to be lower than technique of using DWL on the uphill (possibly losing speed) and then coasting on the downhill (gaining the speed back "for free"). Consuming more fuel on the uphill than one would consume using DWL won't net you better FE overall.