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Adapting Basic Hypermiling Techniques to the HCH-II

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Old 11-19-2010, 10:29 PM
Ohioguy Ohioguy is offline
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Re: Adapting Basic Hypermiling Techniques to the HCH-II

Hey guys, I'm Dan. Picked up a nice low-mileage 07 HCH-II about 3 weeks ago.
I haven't seen much about how hills and grades of the road affect FE. My area has nothing but rolling hills and grades of 10-20% that may last for 1.5 miles. I find it very challenging to keep a minimum load on the engine without losing 10-12 mph when even going up a gentle grade on the freeway for instance. [I](Perhaps I just need to practice my accelerator touch!) Anyways. . .does this loss of mph sound excessive? The problem then is, I then need to get the car up to a faster (52 mph or so) to keep up with traffic flow. Of course this process repeats several times on my drives.

Does anyone have any suggestions about the long, steep grades? With a warmed-up engine, I find I can manage about 25-32MPG going at about 35 mph on a 10% incline that lasts 1. 5 miles.

Also, it seems that the car is too quick to give electric assist when not needed and sometimes too slow offer it when needed. Is this a function of my needing to be more gentle with the go-pedal? (I've read about the ICU flash-reprogram that may cause these conditions. Does anybody have any info?)


My overall mileage on three tanks has averaged about 45MPG. I have noticed on some loops that I can average 55-57MPG using the iFCE. At 45MPG I'm overjoyed considering, I got rid of a full size Ford P/U that averaged about 17MPG. Thanks.
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Old 08-13-2013, 11:03 PM
Fiatdolla Fiatdolla is offline
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Re: Adapting Basic Hypermiling Techniques to the HCH-II

Terrabell,
I would like to thank you for your work you put into this article. I just purchased a HCH 2, last week. I started out getting about 44 mpg, I was so bummed I thought that I wasted my money on buying the hybrid. I researched what I was doing wrong...and pow your post came up. You are a life saver, today I hit 67.7mpg on a 30mile stretch. Its all because of your work....Thanks again. Here is a pic of my mpg... )))))

Last edited by Fiatdolla : 08-13-2013 at 11:06 PM. Reason: img isn't showing up...well doesn't mattter
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Old 08-13-2013, 11:48 PM
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tigerhonaker tigerhonaker is offline
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Thumbs up Re: Adapting Basic Hypermiling Techniques to the HCH-II

Congratulations on your new found {Mileage} achievement.


Terry
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Old 08-14-2013, 08:27 AM
EdwinTheMagnificent EdwinTheMagnificent is offline
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Re: Adapting Basic Hypermiling Techniques to the HCH-II

Great result, Fiatdolla !
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Old 08-15-2013, 08:38 PM
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Bennett Bennett is offline
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Re: Adapting Basic Hypermiling Techniques to the HCH-II

Yep, that was my experience too. Drive it like a regular car, get regular mileage. Learn the tricks of the IMA and the cylinder management in the HCH and it's a great little hypermiling car.
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Old 08-16-2013, 10:55 PM
all_about_the_glide all_about_the_glide is offline
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Re: Adapting Basic Hypermiling Techniques to the HCH-II



69.3 mpg after correcting for the average under report...multiple directions, warm, light wind...today's driving.
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Old 08-30-2013, 10:42 AM
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Re: Adapting Basic Hypermiling Techniques to the HCH-II

Hi All:

These HCH-IIs are still kick @S$$ at the pump!

When this thread was bumped from the ether, I called Rani and told her of new found followers. She laughed and said cool

Wayne
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Last edited by xcel : 10-16-2013 at 12:44 PM.
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Old 09-02-2013, 01:23 PM
OCecowarrior OCecowarrior is offline
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Re: Adapting Basic Hypermiling Techniques to the HCH-II

Great article Tarabell and after 7 years it is still generating responses.
I came across this article a few years ago when I was researching Honda Insight II when it first came out. I found that the technique could be applied somewhat on my non hybrid car at the time. It seemed to also work on the different busses I drive at work, particularly the hybrid variety. The hypermiling seemed to work hand in hand with my defensive driving techniques and I have been working very hard last few years practicing these on a daily basis (much to the scheduling departments chagrin).
Last February I finally got my Insight II so now everything I drive brings ire to the car behind. May I say that the numbers I am getting are amazing (as long as I rough it in the heat or cold). The numbers actually improve with the econ button off ( except when the heater or A/C is on).
Last night I drove the 15 km from work in town not going over 60kph ( around 40 mph) the car putting along at just under 50km per liter) mostly without the use of any electric assist, making it home with 29.4km per liter (approximately 70mpg on the Scangauge).
This is all due to the car and the technique in driving it thanks to you.
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Old 10-16-2013, 12:35 PM
actualccb actualccb is offline
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Re: Adapting Basic Hypermiling Techniques to the HCH-II

I have found I can create the "0 iFCD" scenario with regularity, much like your EV-Assist" scenario. In fact I think this is when it is in true EV only because the engine
"is not" getting any FE reporting when the power is Electric only. I could be wrong, but I can maintain this for about 30 seconds at a time and only seem to get there when the acceleration is so minimal that that are no assist bars and no regen bars and the iFCD must be at/get to 100 to initiate the scenario, and by maintaining just a slight pressure in an effort to propel the car forward it will take off and maintain the speed or even accelerate slightly and smoothly as the iFCD goes to 0.

So I have felt the smooth acceleration you are talking about but I have never felt the telltale bump of the engine kicking back in. The only thing I have to compare to is that I have discovered if I am on a downhill in stopped traffic I can very slightly lift up on my brake and roll forward without engaging the engine, the tach is at 0 because the engine is still in Auto-Stop. I am coasting with nothing but gravity. At about 25 mph, the engine will kick in with a bump so I know how that feels. I do not seem to get a FE rise for this but I am sure it is not hurting my FE, it is just that it is all at relatively low speeds.

The EV-Assit mode I think is the phenomenon you describe when your speed starts to go up but your Tach does not and this is hard to maintain but it possible to create regularly when the speed, traffic and road work together at moment in time and it will drive your FE up over time.

Thank you for all the effort you put into this, it really has and will continue to help a lot of people interested in improving their mileage with Honda Hybrids.
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Old 10-16-2013, 08:47 PM
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Smile Re: Adapting Basic Hypermiling Techniques to the HCH-II

I see that was your 1st Post on CMPG.

A major welcome to this Internet site.

Terry

Quote:
Originally Posted by actualccb View Post
I have found I can create the "0 iFCD" scenario with regularity, much like your EV-Assist" scenario. In fact I think this is when it is in true EV only because the engine
"is not" getting any FE reporting when the power is Electric only. I could be wrong, but I can maintain this for about 30 seconds at a time and only seem to get there when the acceleration is so minimal that that are no assist bars and no regen bars and the iFCD must be at/get to 100 to initiate the scenario, and by maintaining just a slight pressure in an effort to propel the car forward it will take off and maintain the speed or even accelerate slightly and smoothly as the iFCD goes to 0.

So I have felt the smooth acceleration you are talking about but I have never felt the telltale bump of the engine kicking back in. The only thing I have to compare to is that I have discovered if I am on a downhill in stopped traffic I can very slightly lift up on my brake and roll forward without engaging the engine, the tach is at 0 because the engine is still in Auto-Stop. I am coasting with nothing but gravity. At about 25 mph, the engine will kick in with a bump so I know how that feels. I do not seem to get a FE rise for this but I am sure it is not hurting my FE, it is just that it is all at relatively low speeds.

The EV-Assit mode I think is the phenomenon you describe when your speed starts to go up but your Tach does not and this is hard to maintain but it possible to create regularly when the speed, traffic and road work together at moment in time and it will drive your FE up over time.

Thank you for all the effort you put into this, it really has and will continue to help a lot of people interested in improving their mileage with Honda Hybrids.
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