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post #1 of 10 (permalink) Old 11-11-2007, 06:21 PM Thread Starter
 
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Default Green Bars at 65+ mph?

On a recent cross-country trip, the battery would reach the seventh bar (first green bar) and would stay there for hours at a time, whether we were going uphill, downhill, or level. This seemed to occur when the car was working fairly hard - going 65+ mph, windy conditions, and carrying more luggage than usual (though we traveled light). It recurred several times during six days of highway driving. Neither my wife nor I ever saw it reach eight bars. The mpg also seemed lower than usual for the speed we were going, but the wind could easily account for that.

When we slowed down to ca. 60 mph, the battery would eventually drop to the usual levels. And in the week we've been home and back to normal driving, no more green bars have been seen.

In the nearly three years I've had the Prius, I've seen plenty of green bars when going down long hills, but this was the first time the car showed no eagerness to get back to the blue zone.

Have others experienced this? Should I mention this the next time the car is being serviced?

Thanks in advance for any advice ...
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post #2 of 10 (permalink) Old 11-11-2007, 07:09 PM
 
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had the same thing... the prius excels at higher speeds... I've done several road trips and also commute highway daily... best benefit comes from setting the cruise control to 70mph to 80mph in my experience... on cruise the system somehow manages to charge the battery... minor nuances in throttle control seem to be at work here because I have a very hard time duplicating this using the gas pedal on my own... I end up in the blue all the time.. but on cruise at high speeds my prius builds a full charge (green) very quickly.. say within about 3 miles of highway... and it remains there... it even goes into EV mode at these high speeds if I'm on a flat section or slight downgrade.... I've noticed this and take pleasure in showing my passengers that they're running on ev on the highway...

slower speeds I dont get this result... why? who knows... it's cool though!
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post #3 of 10 (permalink) Old 11-11-2007, 08:04 PM
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The car is doing exactly what it was designed to do. Why are you all so surprised?
Toyota claims it to be a standard car. Turn off the MFD and it is.
(EV mode at high speed!! Even down hill? I would suggest a "scan guage." You would be amazed at the variable engine RPM shown.)



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post #4 of 10 (permalink) Old 11-11-2007, 11:02 PM Thread Starter
 
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Well, I was surprised for the usual reason people get surprised - the car was behaving differently than it had for the previous 33 months.

Didn't realize I was so surprised, though!

Thanks, fish - glad to know this is nothing unusual.
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post #5 of 10 (permalink) Old 11-12-2007, 01:29 AM
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But excepting something you are seeing on the MFD was the car running differently than it has for the past 33 months?
(any "idiot" lights illuminated)



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post #6 of 10 (permalink) Old 11-12-2007, 01:47 AM
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I've only had my Prius for 49 months and 68k miles, but I'd consider sustained green like that pretty odd.

My experience at sustained highway speed is that the SOC sits quite solidly b/w 59-61%...solidly in the 5-6 blue bar range.

That said, cold weather 'might' account for some increased engine running to maintain temp and dumping of the extra charge to the battery. But even that is usually just a low speed stop-and-go phenomenon.

Also, I'm NOT suggesting there's something wrong, I'd want to know more about the behavior under other conditions and with future experience. But I do consider it unusual.

Evan Fusco, MD
'04 BC/Seaside
Nixa, MO http://greenhybrid.com/compare/milea.../signature.png
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post #7 of 10 (permalink) Old 11-12-2007, 11:29 AM Thread Starter
 
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Quote:
Originally Posted by hyperion
But excepting something you are seeing on the MFD was the car running differently than it has for the past 33 months?
See original post: "The mpg also seemed lower than usual for the speed we were going."

I'm not panicking or anything, and the fact is we traveled 3200 miles on $180 in gasoline. (Some of the other expenses were higher than anticipated, such as spending the night in not one but two Kansas cities during homecoming weekend!) It was just an unexpected occurrence.
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post #8 of 10 (permalink) Old 11-12-2007, 11:45 AM
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But Mark, with the wind you probably answered your milage question. I believe some Prius owners have posted driving their cars normally for many months while waiting for parts to replace their MFD's. For over dozens of reasons you are apt to see "anything" on the MFD.
Anything not "normal" should trigger an "idiot light" and as far as bringing the car to Toyota with a question, I submit, you probably know more than a service manager about the Prius. (Maybe on this trip the car has been running "perfect" for the very first time!)



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post #9 of 10 (permalink) Old 11-17-2007, 01:34 AM
 
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Quote:
Originally Posted by hyperion
But Mark, with the wind you probably answered your milage question. I believe some Prius owners have posted driving their cars normally for many months while waiting for parts to replace their MFD's. For over dozens of reasons you are apt to see "anything" on the MFD.
Anything not "normal" should trigger an "idiot light" and as far as bringing the car to Toyota with a question, I submit, you probably know more than a service manager about the Prius. (Maybe on this trip the car has been running "perfect" for the very first time!)
What does 'MFD' stand for?
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post #10 of 10 (permalink) Old 11-17-2007, 05:54 PM
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Hi, N3FOL,

MFD stands for Multi-Function Display (the TV screen on your dashboard).

Ken (in Bolton,Ct)

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