Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post

johnunit · 12-29-2011, 05:40 AM

bumping an old (and very interesting) thread...

I see you recommend using B on a downhill. This leaves me with two questions:

1. Does B not involve running of the engine, and therefore increased fuel consumption, or is it purely using the engine for drag (an extra dose of friction for the wheels/drivetrain to be slowed by), and therefore no using any fuel? How does fuel/battery power consumption at a given speed over the point where the engine stays on compare between N and B?

2. At what point is the battery charged enough that I'm stressing it and/or causing the system to just burn it off through spinning the engine? Specifically, where is this in relation to the approximate point where the SOC reads full? Is hitting full at all stressing and causing the system to burn electricity off, or is it at some point past nominal "full" on the factory display?

This is all for an NWH11, with a seemingly 100% healthy battery.

Thanks,
John

12-29-2011, 05:40 AM	#4 (permalink)
johnunit EcoModding Lurker Join Date: Dec 2011 Location: Toronto Posts: 76 Thanks: 14 Thanked 11 Times in 9 Posts	bumping an old (and very interesting) thread... I see you recommend using B on a downhill. This leaves me with two questions: 1. Does B not involve running of the engine, and therefore increased fuel consumption, or is it purely using the engine for drag (an extra dose of friction for the wheels/drivetrain to be slowed by), and therefore no using any fuel? How does fuel/battery power consumption at a given speed over the point where the engine stays on compare between N and B? 2. At what point is the battery charged enough that I'm stressing it and/or causing the system to just burn it off through spinning the engine? Specifically, where is this in relation to the approximate point where the SOC reads full? Is hitting full at all stressing and causing the system to burn electricity off, or is it at some point past nominal "full" on the factory display? This is all for an NWH11, with a seemingly 100% healthy battery. Thanks, John __________________ 2001 Prius - 170,000 KM - just got it (no consistent FE numbers yet)