[bwilson4web]

I stumbled across this over at ecomodder.com: http://blogs.consumerreports.org/car...l-economy.html

model	55 mph	65 mph	75 mph
Acura TSX 2.4L	39.9	35.5	30.7
Insight 1.3L	51.9	44.8	36.5
Camry 2.5L	40.3	34.9	29.8

Finally, someone is actually reporting useful data!

Bob Wilson

[FastMover]

A whole lot better than the typical EPA nonsense!

[drquine]

A great find, thanks! I'd love to see the numbers for other very fuel efficient hybrids: Prius and Civic Hybrid (etc)

[bwilson4web]

This chart gives an idea of what happens at highway speed:


Sorry, I don't have any data for the Honda Civic hybrid.

Bob Wilson

[Smiling Jack]

Thanks , Bob

For what it's worth, my personal experience with my 09 TCH would be similar to these Insight numbers for flat-terrain, interstate driving with AC on but in mild temperatures.

[FastMover]

Smiling Jack said:

... For what it's worth, my personal experience with my 09 TCH would be similar to these Insight numbers for flat-terrain, interstate driving with AC on but in mild temperatures.

That line would be a little optomistic for mine. I do not have graphed data, but it starts at about 48.5 and goes down as speed goes up. It is not linear either. I suspect the curve is more like the NHW20 one, and it is a curve, not a bilinear line. It starts to fall off pretty agressively after about 75 MPH.

If I can get some time this week I will graph the data I have and post it.

RFB

[bwilson4web]

Wonderful!

Get me the data and I'll add it to the chart.

This is not direction, just a suggestion but my typical testing protocol:

• warm-up - it takes about 20 minutes to include tires and transmission
• get up to speed holding cruise control - let everything settle out
• reset trip-meter - starts the 'run'
• ~10 miles - long enough the trip meter is stable
• record results - or remember
• pull-off and turn around
• same protocol in reverse direction
• average the two runs

It isn't a perfect protocol but it is 'good enough' for our purposes. <GRINS>

FYI, I like to map speeds from 15-20 mph up to 80 mph for my whole vehicle charts. Then I also like to do a series of 'hill climb' tests. But these are very sophisticated techniques needed for vehicle modeling.

Bob Wilson

[FastMover]

Bob,



I am sending you my spreadsheet by email as I have no where to post it, and anyway you will need to adjust it somewhat for your format if it is to be meaningful. The following are also conditions of testing that I was to lazy to put on the spreadsheet.

1. All of the data is extracted from my data recorder, and were conducted during my commutes. The total database is about 1800 run records as I record all of my driving, but these were all from my daily communte and came out of the sort for standard conditions and closest to the speeds on the courses that I selected.
2. The recorded run number is actually an average of the three runs that were closest to the target speeds. For every run in one direction, there is a matching run selected in the opposite direction. The target speeds that I used on the filter were every 10 MPH in 5 MPH increments, starting at 40 MPH.
3. Acceleration and deceleration areas are outside of the stated course and data is not included.
4. All of these runs were conducted on as near an ISA standard day as I could get. Pressure was 29.92 in/hg +/- 1 in. and Temps were 60 degrees +/- 5 Degrees.
5. Pavement was dry in all tests, atmospheric humidity was not recorded, but no precipitation was present on any of these data sets.
6. Tire pressure was 38 PSI for all tests, Tires were Michelin OEM S8 Energys.
7. Fuel was Shell regular in all cases with a 10% Ethanol mix (Washington regulatory requirement).
8. There are two courses. The details are on the spreadsheet. The reason for this is that the higher speeds are not possible on course number 1 due to traffic/time situations (and the Washington State Patrol, who frowns on that during the morning rush.) Higher speeds are more common on course number 2.

Someone that is better than I am with simultaneous non-linear equations may be able to arrive at a 2nd order equation that will fit both curves. I just used the Excel trendline to derive the equations for each data set.

Have Fun.

RFB

[FastMover]

Bob, I sent you a PM but no answer. The zip is over 100k, so I can not upload it. I need an email address to send it to you.

RFB

[luvmypriushybrid]

when traveling on the highway, i set my cruise control in my 2010 Prius at 53-55 and so far am getting around 54 MPG on the highway.
i use to own a Honda Fit Sport and drove it around 75mph and was getting only 25-27MPG highway. in the city i drove little slower and was only getting 30MPG. i could only go about 275 miles on a tank of gas that was 10.8 gallons!
i LOVE my new Prius even though i have been a Honda owner all my life. and i didn't want an Insight or Civic Hybrid because i loved all the technology that was in the Prius.
PLUS....i got my Prius II for only $21,500 which is only $1500 more than the Insight (without nav.)
so on the highway, i just set my cruise and enjoy the ride...no need to rush