800+ Mile Club

Thanks. Being down slope from the Rockies and just North of the Gulf, makes for pretty turbulent air around here. A calm day is something to stop and notice much like a windy day is elsewhere. I hardly even notice the wind unless it's over 25-30 mph.

 

My little c has finally made it into the club.



Distance = 807.8 miles
Refuel volume = 9.609 gallons
FE (MFD) = 87.7 mpg
FE (Calculated) = 84.1 mpg
Avg. Speed = 27.3 mph
EV Distance = 518.7 miles
Outside Temp. = 84.2 ºF

Time of year : 10/5/13 ~ 26/5/13 (17 days)

156 km (96.9 miles) after blinking low-fuel warning light, did not run out of fuel.

Disclaimer: The fuel tank is 9.5 gallons, I topped it off to see how far I can run on a tank. I know the risk, I just want to push the limits.

This was done in my daily commute to work. The terrain is flat and mostly highway. I accelerate using ICE (to about 75% on HSI) and then slowly release the accelerator to slightly less than 50% HSI to maintain in EV as long as possible. Once the SOC drops to 40.3%, I pressed on the accelerator to cause ICE to charge the bty. I don't set any upper limit for SOC, if there are no car tailgating me, I will slowly release the accelerator to slightly less than 50% HSI to maintain in EV. I chose 40.3% SOC because once it drops to 40.0%, any slight pressure on the accelerator will cause it to drop further to 39.6% and ICE will automatically come on to charge the bty and will not stop until it hit 45.0%. I want to be able to control when ICE charge the bty base on the conditions ahead. If I 'm going up a slope, I 'll conserve bty power and use ICE. If on level road or down slope, I 'll run in EV as far as possible. That is how I get 64% EV and thus better FE.

Vincent

 

Hi Vincent,
Brilliant tank, but I'm confused how you drive in EV over 43 mph (70 kph) ?
I'm also curious what the '800' stands for on the display you took a picture of.

 

Hi SageBrush,

I did not say I drive in EV over 43 mph, where did you get that? The threshold for c for EV/ICE transition is dependent on SOC, higher SOC will have higher threshold. My SOC is usually low, typically 2 bars, and it seems to cut off at around 38 mph.

Vincent

 

You said most of your driving is highway. I presumed that meant speeds over 70 kph

 

OIC, Singapore highway is different. The speed limit is usually 50 mph and some 55 mph stretches. We have 3 to 5 lanes and I usually take the slowest lane (37 mph limit) meant for trucks so that I'm not holding up traffic.

Vincent

 

Congrats! Excellent work! You can also post this in the Top 20 MPG record holders and be in the #2 spot.

SG really has the perfect hypermiling terrain and conditions.. flat, warm, and not much road rage.

Looks like the c is the ultimate hypermiling car right now as evidenced and confirmed by #1 and #2 spot in the top 20 thread. would love to try my hands on one...

 

Understood.

Have you tried p&g rather than the technique you use of constant battery involvement ? With a 'normal' SOC of say 60-70%, you can pulse up to 42ish mph, and then glide down to whatever you like -- perhaps around 35 mpg for your commute.

You might manage 40 km/L

 

Great job on the tank. I'm curious also, what does the 800 stand for on the display?

At 87.7 mpg MFD he is #1

 

The traffic around here is not conducive for p&g, there are too many cars on our tiny island. It is very difficult to find a rural area with few traffic, at least not on my usual commute.

Vincent

 

It is 8:00 Hrs. The colon is blinking and just happened to disappear when I snapped the photo. Here is a photo of Trip B that shows the colon.



Vincent

 

PLEASE NOTE: I originally posted the following on July 3rd of this year under a seperate thread titled "824 mile tank!!!", but am copying and reposting it under THIS thread:

HOLY COW this car is incredible! I have a 2010 Prius III with almost 34,000 miles now. It is all stock with the Good Year Assurance tires from the factory. I run 44 psi all around. I also use a Scangauge II. I have been using various techniques I’ve learned from these forums, like P&G, trying to use electric to accelerate from a stop to about 10 to 15 mpg, then use the engine with the HSI bar just below the pwr section. I usually accelerate at 1600 to 1900 rpm. Then when I’m at my target speed or just above it, I keep the HSI bar a bit to the right of middle, so the engine is on.

If I’m not on the highway and there is a good stretch of road ahead of me and few if any cars around, I’ll use electric only where only a bit of the large bar is lit up, but it’s not that often I get to do that. I commute to and from work in Philadelphia, so about 60% is Interstate and the rest are side streets with many lights and stop signs. There a few large hills near my home, but most of my commute is relatively flat.

On the Interstate, when there is no traffic, I usually go between 65 and 55 mpg. So, on June 12th I filled the Prius up and kept pumping after it clicked off, I filled it until it seemed to keep clicking often, so it was very full but you could NOT see any gasoline at the neck.

The high temps were from the 70’s to the low 90’s. The fuel bar stayed full until 166 miles, when the top bar vanished. The bar was at the halfway point at 410 miles. The last pip flashed at 711 miles. That’s when I put a 2 gallon gas can full of fuel and a funnel in the trunk, just in case. DTE was 0 when I hit 733 miles. I just kept driving and driving. Eventually, I didn’t want to risk it anymore, so today on the way home from work, July 3rd, I went to the same pump at the same gas station and filled up. The pump automatically clicked off at 11.2 gallons, but I knew I could get a lot more in there. Well, as you can see from the photos, it took 13.11 gallons, and the gas was all the way up and right at the neck where the gas cap goes. You could see it. Displayed is 66.3 mpg for the tank, but calculated is 62.9 mpg.

I rarely ever used the AC, just open the windows some. Any questions, please ask. I’ve learned so, so much from this forum and still have a lot to learn. I’m hoping I can give something back. Also, as you can see, it seems you can store quite a bit more fuel than the 11.9 gallons. I won’t be doing this again, namely because filling it up that much may be detrimental to the car.

Read more: http://priuschat.com/threads/824-mile-tank.128848/#ixzz2egs7Ac6e
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Well, it is that time of the year again in the southern hemisphere! During November 2011 I managed to reach the 700 mile mark on one tank (700 Mile Club | Page 4 | PriusChat) and this year I managed to reach the 800 mile mark during early summer also.



Since about half of the distance was driven in town and the other half on the open road I had to use all available methods like pulse and glide, driving without brakes, driving with load and even ridge riding while driving in the rain. Conditions were hot but not humid for most of the time although at the end of the tank we had a few humid days and one day of rain. I drove about 150 km with the low-fuel warning light blinking at me.

I drove the whole tank without any aid from any gadget like Torque for Android or ScanGauge. During one week I had to drive with the RX450h of my wife. During that week my wife drove the Prius and did a sterling job of keeping the consumption down!

Next target for me is 1400 km with the Prius and 1000 km with the RX450h.

 

Wow, Thats amazing! How did you guys achieve that mileage? I cant seem to break 40mpg.

 

I didn't go through all the posts but do most of you guys fill up the tank as bennela? 13.11 gallons! wow!

 

No, I just filled as normal when I did mine. Just to the first click.

 

Over filling the tank like that is not wise. Repeatedly, it will damage the system.