Slight uphill accelerate so that your iMPG = MPH (12.0 kW) Moderate uphill accelerate so that your iMPG = 0.8xMPH (15.0 kW) Significant uphill iMPG as close to 0.8MPH as possible Moderate downhill iMPG =1.3 or 1.5xMPH (8.0-9.0 kW) Significant downhill use Warp stealth also known as yellow arrow condition, by feathering the gas pedal (0. 0 kW). kW were calculated using Hobbit's SG xgauge. Conditions: 77-82 F, windows rolled down midway, no A/C, original tires somewhat worn after 4 years at 44 psi. Traffic: significant but not interfering Distance: 30 miles Average speed according to MyTracks app: 54.0 mph MPG measured using SG II, and consistent with MFD indication when averaged with preious miles in tank. Terrain and speed graphs are shown below. Measurements taken reflect miles 0-30/31. At around mile 30 the SG II AVG gauge showed 72.2 MPG. EDIT: From some recent comparison between scangauge and MFD mpg, it seems like 72.2 scangauge MPG is more like 69 MFD mpg. I used to think that the Prius was much better on flat terrain, but it doesn't seem to be the case at least at these speeds. For anyone curious my MFD tank measurement showed 64.9 mpg after 312 miles.
Nice data collection. You might consider looking into doing proper screen captures on your Android phone. I use an app called "Shoot Me" to take screen shots. The only issue is it requires root access (which you have to go out of your way to do). I believe some versions of Android have a button sequence that will initiate a screen shot. What model of phone are you using? Attached is a shot of a recent trip from Chelan, WA to Seattle, WA...
Thanks for your encouragement Thanks I'm already rooted and run 2.3.3 ChevyNo1 ROM based on Cyanogen on my D1. I was recently searching for this, but only found an old way of doing screenshots it wasn't just an app. Got it now and updated the image with a proper screen shot. That is some altitude you're negotiatinging! How do you keep your SOC low for the downhill, do you just use B when climbing down hill or maybe glide just before the top of the mountain? What is this bird icon in your notifications?
Glad I could help. I've got a Samsung Vibrant and tried Cyanogen briefly. Since they don't support my GPS yet, I went back to a different custom ROM. Once 2.3 drivers leak for my phone and Cyanogen adds it, I'm sure I will be back on Cyanogen. I only take that trip once or twice a year, so I'm still figuring out what works best. I saw around 45MPG for the trip which is about what I get driving around town from Seatac to Bellevue and back. I'd love to get closer to 55 or 60MPG, but I don't think our Western Washington hills and temperatures will allow it. Friday it got up to 72F and I got 54MPG according to the MFD. Best MPG I've achieved since purchasing the car in December 2010. Here is that trip from Seatac to Bellevue. As you can see, I start at 110 feet, quickly drop to around -35 feet, climb to around 240 feet, drop down to around -35 feet again, and end up at around 318 feet. MyTracks showed an elevation gain of 929 feet, min elevation of -38 feet and a max elevation of 318 feet. Not a mountain by any stretch, but not flat either. As far as crossing mountain passes, I've found that the climbing lowers the SOC such that when I start the decent I have lots of room to charge. This last trip I managed to do both descents (Snoqualmie pass and Blewett pass) without resorting to B mode. As long as the traffic ahead of me was cooperating, I was able to descend fast enough that I could occasionally lightly push on the gas to take it out of regen (without using gas). On the few uphill parts of the descent I tried to use as much electric power as I could since I knew I would have an excess and if I didn't use it up, the car would burn it off by over spinning the ICE. The bird icon is TweetDeck. I pretty much always have new tweets so I usually have the icon in the notification bar.
So is it intentional that your speed drops precipitously at around mile 7, before the the top of the hill? If time and traffic allowed I would try to use as much engine as possible to only gradually lose speed until the top of the hill at mile 8 and then glide (no arrows, or engine spinning) downhill. I assume that climbing from 20 mph to 42 mph between miles 7 and 8 would result in a massive mpg hit. Your hill from mile 6.5 to 8 seems much steeper (twice the elevation over a 3rd of the distance) than mine, but it might still be worth a try to avoid such a slowdown.
No, the speed drop at mile 7 was caused by slow traffic. I would have tried to use the ICE as you described if I could have. People in the Seattle area aren't very good (or efficient) drivers. They tend to slow down before a hill and really freak out when it starts to rain. You'd think we would all be used to the rain, but people never seem to. Also of note: I get on the freeway at around the 0.5 mile mark and exit the freeway around the 15.75 mark. I never realized the climb from the freeway exit to my office had so much elevation gain until I saw it charted out like this.
