Green Car Congress: Honda Study Finds Insights Eco Assist System Results in Average 10% Improvement in Fuel Economy After 300 Drives, Up to 20% Max My interest is in hardware that supports efficient driving while others prefer to change the driver. Certainly Honda has shown the latter approach has merit and Ford has also taken that approach with the Fusion. Bob Wilson
Bob, I am unable to determine just how you're thinking here. I am interpreting this statement to address ICE/HSD info display. Are you suggesting that the approach taken by Honda and Ford are better than what Toyota has done? Included in an answer to my question would be a comparison of the Gen II and Gen III eco-data displays. I have not driven a Gen III so although I know it is different, I don't have a feeling for if on the whole it is "better" -- granted a subjective opinion at best. As to the Gen II, I don't think between the two MFD screens Toyota has provided drivers with a very good suite of tools for eco-driving. I've said so loud and long; http://priuschat.com/forums/gen-ii-prius-fuel-economy/42280-mfd-energy-graph-mpg-h-better-way.html I've gone the ScanGauge route, and it's better, but far from perfect. The main problem I have with the SG is it's Atari-era display. I'm sure it's a cost cutting measure. There are combined gauge units that have far better basic displays, and are even customizable. But none have something like the programable hybrid/Prius specific XGauges like the SG. In my opinion, the one with the best potential is the http://priuschat.com/forums/gen-ii-prius-modifications/56654-dashdaq-can-we-make-new-canview.html The best answer would be for Toyota to step up and provide two levels of data availability/display. One rather simple one for new drivers that provides basic data in a simple to use and understand format with a pleasant to look at display. The second -- which could be an extra-cost firmware enhancement -- would give access to ALL the important ICE/HV battery data that can be of help to anyone who really wants to go after high FE/MPG numbers. (The on-going Gen III regen/hydraulic brake interaction recalibration suggests that it could be done via the OBDII port.) My opinion is Toyota needs to make this basic change hurry-up quick. As new hybrid makers enter the market, especially if they come from a sporting background as opposed to Toyota's basic family car background, they will offer data retrieval that is more complete than Toyota's and better looking and more flexible than the ScanGauge. One man's opinion.
If I interpret what Bob said, I believe he prefers changing the hardware (ie vehicle) over changing the people. I would have to say that in the real world, this is a more feasible approach. In general, people hate changing their habits and would rather have it done for them so that they can continue to do things the way they've done them over and over for years. Now, if they could find a happy balance between the two and adopt it across the board, it may very well be a plus no matter how you look at it. However, while they incorporate things, the manufacturers need to understand not to over-step that boundary and still provide their user with the ability to determine (to an extent) how much they are given from a peopleware standpoint. I hope that makes sense, as I just got up a few mins ago and haven't finish my first cup o joe yet
I was going to expound a little more about this last night but the EPA mileage site was down. It still is this morning so this is going to be from my often foggy memory and won't include the lab evaluated, composite score: Column 1 Column 2 Column 3 0 MPG Model Year 1 ~49 2010 Insight enhanced display 2 ~49 2010 Prius HSI 3 ~50 2009 Prius standard 4 ~47 2004-08 Prius standard 5 ~45 2001-03 Prius standard My foggy memory is that the Insight user mileage is running well above the lab mileage. The HSI seems to meet expectations but something interesting is happening with the 2009 Prius. The user data shows a small group exceeding the mileage of the previous model years with no reports of a hardware change. Now I'm one who believes ECO mode should modify the cruise control laws to optimize fuel efficiency. It would allow a +/- 2.5 mph change or better still a 0/-5 mph range by trying to keep the ICE rpm in an efficient range before it kicks up to a higher power but less efficient region. I have no problem if it became an option for all Toyotas. I also think adaptive cruise control and accident avoidance should be an option for any Prius (probably all Toyotas.) This would again be a quantitative improvement in vehicle performance allowing the driver to pay attention to traffic flows. These 'hardware,' actually systems improvements, would improve Prius and/or Toyota fleet performance of the owners. They may not show up in the EPA ratings but so what. It would should up in the pocket books of the owners ... the repeat customers. Bob Wilson
I agree on doing as much as possible with hardware ... but when things moved from musket & ball to rifle & shell, there still remained a need to train the troops to do their part so that the hardware could function at its best. In vehicle terms, one of the examples which quickly comes to mind is people who race towards the red light only to brake sharply when they arrive. It'll be a while before hardware overcomes this one (which will require taking control of the vehicle from the driver, I think), so retraining the driver is needed too.
I think a instant fuel economy meter in all vehicles would be a great start to retraining. Probably more applicable in the hybrids, but I think it would help in standard cars as well. I know it was an eye opener for me and my wife when we got the Prius. Basically boils down to feedback. The more visual the better.
I couldn't agree more. It is difficult to find a simple prior case related to automobiles. * The transition from manual to automatic transmissions was a dumbing down of what driver's involvement was required. * The transition to ABS required some retraining, that is, it was nonintuitive that when you felt the brakes pulsing you need to keep pressure on the brake pedal, not let off. * There was a much earlier transition that is little remembered, the transition from make/model specific controls -- sometimes the spark advance and throttle were on the steering wheel! -- to the standardized locations that we not only accept without question today, but would be taken aback should an auto maker come up with a "better way," like the Gen I and III dash board shift location. While almost comically different, the transition from horse and buggy to auto-mobiles may be most illustrative. A successful early adopter has to completely rethink and adapt their approach to transportation. (It is interesting to note that one of the early arguments against the auto-car was limited range due the availability of gasoline only in cities and towns. Hay was obtainable just about everywhere, and grass alongside the road was free. A horse drawn conveyance, like the little pink bunny could go on, and on, and on...) I would suggest that the reason for most of the current arm waving and squawking has to do with the Prius' transition from niche to mainstream vehicle. It appears that for the most part the "mainstream" is not ready for the transition. They aren't ready for, don't want to hear about or consider that the car is any different than their last car. To a large extent Toyota is to blame. It may be their headlong rush to overtake GM as the largest automaker (I hope I got that right.) Whatever, as the Chinese saying goes, "Be careful of what you wish for, you just might get it." Well, Toyota got their wish, but they have not been conscious enough of any unintended consequences. In this case it is the current media-fanned pseudo-panic. Now they are "getting it" in a wholly different, and surely unitended way. The Prius has always been on the leading edge of the ICE-only to hybrid power transition. The leading edge takes all the hits. That's life in the fast lane. Looking to the future, hybrids themselves are said to a transitional form themselves, a halfway step to EVs, BEVs, etc. Because EVs and BEVs have such different capacities and capabilities, some forward looking potential drivers/owners are already confronting, at least intellectually, what changes they may need to make to their life style and driving habits. You can see it in the recurring discussions involving where to plug-in, especially public recharging stations and "range phobia." This latter is really going to bite the leading edge EV makers in the butt. Most non-reflecting buyers are not going to anticipate that range will vary widely depending on air temps as the batteries will need to be heated and cooled, just like the humans in high and low temperature conditions. I expect that range will be reduced up to 1/3, Ouch! Hey, but that's part and parcel of the new technology package. The big question is will Nissan, Think, Mitsubishi, etc, make it perfectly clear up front that this is a controlling reality for EVs, take it or leave it.
My Sebring convertible has a trip computer, and (among other things) it has two MPG displays you can call up (one at a time) -- instant fuel economy and average MPG since last reset (I reset every fill-up). You're right. I've used the instant readout a lot since I first bought the car, and saw mpg improvement due to my learning as I drove. I have been putting the data into a spreadsheet since 5/21/09 (a bit after I bought the Prius). "Lifetime" mpg since then is 25.5. Best tank was 30.5 -- on hiway (the tank before that on the hiway was a 29.8). Driving is largely city rather than hiway, which makes me happy to have 25.5 long term average. The Prius has tought me some of "the tricks" to improving MPG, and I can apply some of them to the Sebring. The best of all is that, for some reason, the Sebring has considerably less engine braking effect than other cars I've had. In spring (when Sebring comes out of its winter hibernation), I'll see how close I can get to pluse-and-glide.
Maybe they have not entered their winter mpg yet. It'll be interesting to monitor it to see the average goes down to the 04-08 level.