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Discussion Starter #1
This year's Tour de Sol, which is a Sustainable Energy & Transportation Festival, includes a rally event with a $5,000 prize for the most fuel efficient participating hybrid vehicle that can achieve >100 mpg over a 500 mile distance. The confirmation for a vehicle that may be eligible for this prize would be a 15 mile test run.
As a participant, I have no chance at the prize, traveling only approximately 150 miles in predicted much cooler temperatures with a headwind. There are a number of long and steep climbs through the Berkshire mountains of MA, including a 10 mile long climb. The MIMA modification without significant additional battery storage can't sustain the high fuel efficiencly power required for that climb.

Having the second known Insight with the operational MIMA (Manual Integrated Motor Assist) modification, I took advantage of today's unseasonably warm weather test my own estimates as to how much this modification could potentially improve fuel economy.

The test run was completed at or above the posted speed limits on a familiar round trip, approximately 15 miles to and from a location in southern NH. The terrain is moderately hilly, requiring occasional downshifts, and there were several stops, including one at a merge on a steep uphill grade.

The MIMA was used occasionally, and in this case, more often than in my preferred driving style.

The MIMA_L (prototype development) circuit is apparently sensitive to temperature, and today, it wasn't tuned for optimal performance. Consequently, the maximum assist available was approximately 50 amps. The properly adjusted MIMA_L, and presumably, the MIMA_C (currently in development) can provide up to 100 amps of assist to the electric motor.

The result exceeded my expectation!

http://photos10.flickr.com/13485619_b8e30da010_d.jpg

For the record, other measurements include:

- Outdoor ambient temperature: 84 deg. F
- Battery pack temperature: 86 deg. F (at conclusion)
- Intake manifold air temperature range: 96 deg. F to 109 deg. F
- Tire pressue: approximately 50 psi
- Indicated battery pack SoC at outset: 75%
- Indicated battery pack SoC at conclusion: 50%

This was a test run, without a passenger, on a warm day. The real test of the MIMA modification's effectiveness will be on the daily commute with school buses, highway gridlocked traffic, and longer hills. Stay tuned, I'll be posting more data in a week or two.
 

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MIMA test run

well, nemystic - that's not too shabby at all! I think I could definitely develop an interest in this MIMA thing....
 

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Discussion Starter #4
With so many on the forum seemingly eager to put their Insights on steroids, and some good information posted about the benefits of the turbo charger modification, I feel obligated to share information as only 1 of 2 (or 3 peut etre; Yves?) current Insight owners with the much anticipated MIMA modification.
In this case, the installed control circuit is the MIMA_L prototype, that provides optional, manual assist and regen, and no link to the TPS (throttle position sensor) and other engine data that the “deluxe” version of the more advanced MIMA_C should have.

As anticipated, I’m consistently getting 10 – 18 % improvement in fuel economy with casual use of the MIMA feature (and some other modifications) during the last 7 days of commuting on a familiar route to and from my work place. During all of the commutes, my indicated high voltage battery SoC was 80% or more at the start and finish, and never went below 75%.

As time allows, I’ll provide more specific details, including an elevation profile of the moderately hilly route, and statistics from last Friday’s 38 mile round trip commute, with a trip mpg of 91.5, inbound temperature of 48 deg. F, and return temp. of 61 deg. F.
Over 100 mpg fuel economy should be easily achievable in my "real commuting world" when the average outdoor temperature gets to 75 deg. F or higher. For now in New England, we are locked into an unseasonably cold and mostly wet weather pattern with no end in sight. :(
 

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Are you running with any warm air mods?

If not, getting that mpg in 48 degree weather up and down hills is nothing short of amazing. It still is good with warm air mod, but without truly insane for 48 degrees. MIMA is the killer app.
 

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Discussion Starter #6
Yup, the warm air intake probably helped, especially on the inbound commute.
I think the warm air intake is most beneficial in the winter, as a cold engine apparently doesn't do lean burn. I may be wrong about this, but I believe in the warmer temps, the WAI mod. yields diminishing returns, presumably because of reduced air density. (The turbo, which "Sputnik" doesn't have, increases air density.)
On the other hand, the reduced air density in the warm weather (we're still waiting for here in the northeast) is the biggest factor in improved fuel efficiency because of the reduced aerodynamic drag.

We'll be anxious to hear about "Edwin's" performance with Turbo + MIMA.

[moderator edit to prevent un necessary thread "bump" up the list]

For those interested in the MIMA project or those still wondering what it is the threads have become too fragmented for the developer to maintain and he has requested that his other MIMA threads be locked.

Please understand that any further suggestions for design changes will not be honored since the process is too far along. However, since its *opertation* can be easily modded in software such limited opinions will be welcome.

A few of the old threads that will most likely answer all your questions are here:

Hybrid controls and the MIMA project
http://www.insightcentral.net/forum/vie ... php?t=2471

Mima Statue Update
http://www.insightcentral.net/forum/vie ... php?t=3176

MIMA L works in a CVT (automatic circuitry with foot pedal)
http://www.insightcentral.net/forum/vie ... php?t=3233
(Moderators note: the newest version of MIMA is CVT compatible)

MIMA Display and Joystick Housings
http://www.insightcentral.net/forum/vie ... php?t=3353

The developers site is here:

http://pages.cthome.net/genesisone/index.htm

Its a complex topic and modification. And one that should be carefully reviewed if your deciding on purchase. The purchase thread is here:

Buy / Sell, "MIMA PRICE finally"
Sorry, due to the anti spam measures in that forum you must navigate manually.


The subject is still open for discussion at the developers selected for consolidation thread here:

http://www.insightcentral.net/forum/vie ... php?t=3357

Locking other threads. Future MIMA threads will be locked and follow-up's directed to the thread above.

[end]
 
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