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Hybrid Vehicles Toyota Camry Hybrid Toyota Camry Hybrid MPG-Real World Numbers
856 messages, Last post on Nov 22, 2009 at 8:38 AM
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Replying to: wvgasguy (Oct 22, 2006 12:17 pm) g
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Replying to: grg (Oct 22, 2006 5:16 pm) If there is that much of an impact to them I would conclude it's because they run on mild battery boost more often and thus the ICE has to run to keep the battery charged for the AC. In the case of my hilly drives (and I still get 39.63 mpg overall)perhaps because my ICE is constantly on and off for up and down hills it keeps the battery charged incidentally with no incremental impact to overall FE? I say this because a lot of times while monitoring the NAV Energy screens I see the ICE charging the battery while there is excess hp being generated. I may be in a mode somewhere between FE of 40 to 60 but my battery is being charged while the ICE is still propelling the TCH. I will be curious to see how steady 30 degree temps affect the TCH milage from someone that gets good FE (like you). Keep me updated please. The same folks have suggested that all cars see a drop of 10 to 15% in the winter. On previous cars at 16 mpg I probably didn't notice it. However at 39+ I will notice a 10% drop easily. I'm still wondering though since a lot of my high FE is due to the battery will we see as much of a drop as a ICE only vehicle. The next few months will tell the story. |
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Does anyone know whether the A/C is OFF or ON when the ECO is ON (display shows ECO) and the A/C is OFF? Is it better to have the ECO mode OFF or ON for FE when the A/C is OFF??
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Replying to: agnosto (Oct 23, 2006 4:09 am) I too await the answer from someone more knowledgable. |
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I no longer can post on the "other" hybrid forum but I know many of them check these postings so I'll answer their question as well as post info for regulars here on edmunds. They were concerned that the FE calculated manually is as much as 2mpg different from the computer reading. I've had the same experience. If you don't fill up to the exact same spot in the tank (really hard to ensure) you may be off from tank to tank by several tenths of a gallon. Also if you are filling a "short" tank, that is maybe only after 300 miles rather than 600 miles the error will be even further exagerated. Example: with 300 miles the difference in 36 mpg and 38 mpg is 0.4gallons. Typically you won't be off that much but the error from the last fill up can exagerate the current tank as well. My manual averages vary from 2 to 3 mpg low to 1 mpg high as compared to the computer. However, over time and 14,500 miles I have found that the computer is within 1 mpg of my manual calculation. Now here's the rub. I expect my manual calculation to be accurate. However several GPS owners and my self (bought a new GPS) have verified that the odometer reads 1.5% low. When I "correct" the manual calculations over the life of my TCH I have made up over half of the discripancy. For me, my lifetime averages are: 38.6 manual calculation 39.6 computer reading 39.2 "corrected" for odometer error There is still a difference, but I have found that the computer reading is closer than the manual. Bummer for a die-hard number freak like myself. I have not heard a good explaination about the rest of the error, but I know that in the natural gas business it's difficult to get an accurate measurement on a meter for low flows and high flows from the same meter. It's possible that the measurement of fuel usage (number of squirts from the FI nozzel)in the TCH has error in it and possibly in low fuel usage situation (pulse and glide) the computer may give inaccurate readings. Anyway, for what's it's worth, that's my 2cents on computer vrs manual calculations. By the Way, the speedometer also has about a 3mph error at 70mph. It does not effect anything but the speed reading as the odometer error appears to be tied to the computer. Also, the error in the speedo is in the opposite direction of the odometer error. Any correction in speedo (taller tires) makes the odometer error even further off.
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Replying to: wvgasguy (Oct 26, 2006 7:33 am) |
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Replying to: wvgasguy (Oct 26, 2006 7:33 am) ditto
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Replying to: jbollt (Oct 29, 2006 6:40 pm)
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1) Climbing a very long grade that will quickly deplete the battery -- it will be best to space out elecrtic assist evently through the whole climb than run efficiently for the fist half of it, and at some high RPM for the rest of it once the battery is spent. I read this on another post about wanting to have the ability to control manually when the battery would kick on for special circumstances. Those of you with the NAV system probably already know this, I'm not sure the dash display adequately shows this mode though for non-NAV systems. Typically when I am going up hill, reguardless of the grade, I am able to maintain a speed that not only gets me up the hill adequately quick, but recharges the battery at the same time. If I give it too much gas to speed up the battery goes to boost assist. I can let off a little and allow the ICE to generate excess hp with in turn allows the battery to charge while going uphill. Granted you may not go as fast as you want but it's possible to charge the battery in an uphill drive. Thus if you know there is a long strech of flat coming up and you want maximum battery charge available you can still achieve it. I live on a steep grade that typically costs me 0.1 mpg every time I drive home. Some times I make it up going down, but typically not as my ICE is running to warm up the car. However what usually hapens is that by the time I get up the hill, then next time I leave, I have a full green charge when I'm ready to pull out on the highway. This allows me to quickly speed up to the limit and back off and I am able to maintain between 40 to 50 mpg average FE all the way into town (4 miles) and at that point I can drive around town in E mode. It's not untypical for me to average 45 mpg on this regular frequent trip. I have found that I can pull away from a stop sign in E mode when the battery is full at a reasonably quick acceleration. (It is a small town though_people may be more patient_1 mile will take you around it_twice) |
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