Prius Plug-in 2012-15 :: Using EV Mode To Pulse And Glide Above 42 MPH?
Nov 6, 2014
As I understand it pulse and glide should work at pretty much any speed. I'm trying to adopt pulse and glide but I drive on mostly 55 MPH hilly roads. If I'm in HV mode and have some EV range I find I can only get ICE shutoff below 42+/- MPH. However if I switch to EV mode as I back off the pedal the ICE will shut down at speeds up to 62+/-MPH. Switching from EV to HV while gliding at speeds above 43 MPH causes the ICE to resume turning. So I've tried accelerating to my desired pulse speed in HV coordinating releasing the pedal with selecting EV mode to begin the glide then beginning the next pulse by simultaneously pressing the pedal and mode button. Alternatively I can stay in EV mode for the glide then floor the pedal to restart ICE but that risks getting an undesired higher less efficient ICE power level and doesn't allow lower power pulses to allow glides to begin on downgrades.
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I'm talking basically about the equivalent of your standard pulse and glide in the regular Prius. But the PiP would allow you to do it up to 62 mph. However, you would manually have to toggle the HV/EV button to do it. It would be tiresome.
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On a recent 3k plus trip where I pulsed and glided a ton, when the PIP was in HV mode but gliding in the sweet spot where I had thought the engine would stop turning, no matter how I tweaked the glide, the ICE always turned at a minimum of 998 RPM per my torque app. The display was always showing 999 mpg in that situation so I assume it wasn't using fuel but just rotating freely. Is that the default behavior for HV mode? I,e, always rotating at 998 minimum rpm perhaps so it can kick in quickly if need be without vibration?? If so, the 10k oil change interval seems dicey as the engine is technically turning all the time when in HV mode. I was planning to change at 5k anyway.
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While pulse and glide, is it better in Eco mode or normal mode with Prius c?
Eco mode will take more time to pulse, it may lower mpg?
Nexus 7 ?
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I have great success doing pulse and glide in city. I once drove 32 miles non highway at 90mpg in a single trip using this technique. But it seem that it is impossible to do so on the highway, speed goes down too fast during glide. I found that too many pulses on highway actually decrease mpg. How to greatly improve mpg in highway driving?
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I am a new 2010 prius owner and I am very interested in obtaining the max MPG in my new car I have read and seen video with regard to the pulse and glide method. My question is
1. can you shift into neutral on the glide
2. can this do any harm to the car.
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Two weeks ago we were driving across rolling hills in southern Ohio. I started to wonder, "What would be the perfect road for the Gen 3 Prius?" Is there a road shape that would allow the benefits of pulse and glide without the speeding up and slowing down?
Let's assume no net elevation change on an interstate highway and a driving speed of 60 or 65 mph. To stay in the most fuel efficient engine ranges for the ICE, we'd want down-hill stretches where the power demand shown on the hsi would be in the bottom 1/4 of the total Echo range, and up-hill stretches where we could stay in the top 1/4 of the hsi Echo range (just below Power).
Would the optimal ascent and descent angles be the same, or would the angle of decline be shallower that the assent angle? Would mileage (mpg) be better on this ideal up and down road than mileage on a flat road at constant speed?
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Correct me if I'm wrong - Pulse & Glide is not really possible at speeds higher than, say 120-130km/h (74-80mph). I have noticed on my last trip that if you want to keep 130km/h average and you pulse up to 140km/h and glide down to 120km/h, when "gliding" the engine never shuts down, and the glide period is very short.
When pulsing back to 140km/h it takes a "long" time and the instant fuel consumption is "high" (e.g. 6-7L/100km) while when "gliding" you are actually at 2-3L/100km, which means on average you are at about 5L/100km, which is what I would get in any case if keeping speed constant with the CC at 130km/h.
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I own a Prius C 2013. I read about Pulse and Glide, and I also watched youtube about it. I somehow have never seen a situation where there is no arrow in the Energy Monitor. The best I have ever seen is arrow coming out of the battery only which is EV mode. Some people say 35-45 is the best speed for P&G, but I never see "no arrow". What speed makes the car run without arrow?
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I am new to the Prius and have noticed that when cruising the car seams to surge or pulse while driving. Is this normal?
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I have noticed that when driving in EV mode when the car switches over to HV mode the Eco icon always lights up! Of course you can select Eco, or Power mode manually, but when it does this automatically, after the EV battery charge is used up, it keeps showing the Eco icon being lite not HV.
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Can you drive in EV mode with the A/C or heater running to keep you cool in summer and warm in winter? If so, how much does it change the range from the normal 13-14 miles of EV?
I'm trying to determine how short of a commute I would need to have to not use gas while still driving normally and not giving up climate control use.
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You can put your car in drive, but also, you can put it in the "B" position. What does that do? How do you best use it? And what does "B" stand for anyway?
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On a long downhill, with EV mode selected, the car goes out of EV mode when one surpasses 65. When slowing down from 70, the car will not go into EV mode until one is down to 62. THen it stays there until one exceeds 65. I wonder if there is any difference in what is happening when one is going downhill at 66 vs 61? Both are using 0 gas. But one counts as an EV mile and the other does not. Here in high Colorado, this sort of thing makes the EV ratio somewhat meaningless.
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On occasion - not frequently - I'll notice the gasoline engine kicking in when I'm in ECO/EV mode with plenty of EV battery left. Today it happened on a relatively flat street, going maybe 30 mph, without the a/c or anything else on, and about 7 miles left on the EV battery indicator. In less than 30 seconds it went back to pure EV and the gasoline engine never kicked in again.
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Today I drove my Prius Plug-in from my home almost to the highway in EV mode. When about one minute from the highway, I pushed the PWR mode button twice, on and off, and the ice came on for warmup. All the green symbols above the speedometer were cleared. I then again pressed ECO to bring back that mode.
I believe the vehicle was in what I think of as blended HV mode. This mode blends the extra battery capacity of the Plug in with the ICE. After a 40 mile trip, the available EV miles dropped from 13.9 to 1.2, and the trip meter registered 76 MPG. I went up and down a serious hill which probably reduced the mileage.
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Is there a difference between full EV mode and the early HV mode where you are in EV (left half of the indicator on the HSI screen)? Aren't you in full electric in both situations? If so, then why would you need to manually toggle between the two modes?
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I've noticed occasionally my music goes silent for a second or so when the iPod is plugged into the USB port. But then it will play without missing a beat for long periods. what could be wrong? No skips when using the aux plug.
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I'm convinced this is a real problem with my 3-month-old 2013. When I bring it in for the 5K service, soon, this will be my No.1 issue. When running in EV mode, if you happen to start the ICE it will continue to run when you stop. In fact, it races - it doesn't just idle. I've tested this by being stationery for up to 5 minutes. This occurs not just the first time the ICE cycles on and off - it's every time. It only stops while driving (or by powering off).
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I had my brand new plug in prius for 6 whole days before my house was hit by lightening, while the car was charging. The car has been in the shop for 3 weeks since that has happened and they eventually replaced the "electric vehicle recharge unit". But it still doesn't seem right to me. one of the things that is happening is that the EV switch is not operating while I'm driving.
For instance: I'm driving locally on EV and then get on the highway and when I get to the point that the engine kicks on, I hit the EV switch to turn it off and move to hybrid mode. However, even though the EV light is off, the battery continues to discharge and will eventually completely discharge. To prevent this I do a number of maneuvers like hit the brakes repeatedly or hit every button the dash (EV, ECO) until it stops!
This cannot be normal but then again I only drove the car for 6 days before lightening struck. It also happens the other way. If I'm driving on the highway and get off and then hit the EV switch to turn the electric back on, the electric motor doesn't kick in.Am I imagining this? Is there some fancy way to switch EV and back on the fly?
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Wondering if there is another factor involved here...such as the wrong gauge. I'm routinely seeing battery temps in the mid to low 90s even when it is pretty warm weather and I am in EV. Is this possible? On my old Gen3 even when I use the battery just a little bit on warm days it would go over 110. Does the lithium chemistry just keep it that much cooler? Or does the cooling system keep it that much cooler? Or both? What are other people seeing for battery temps?
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