When to let IMA kick in - Insight Central: Honda Insight Forum
 
Go Back   Insight Central: Honda Insight Forum > 2nd Generation Honda Insight Forum > Honda Insight MPG

Insightcentral.net is the premier Honda Insight Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools
Old 11-04-2011, 06:05 PM   #1 (permalink)
Member
 
Join Date: Sep 2011
Location: Bolingbrook, IL
Posts: 38
Default When to let IMA kick in

I've had my 2011 since June 21, 2011 and have about 3,700 miles so I'm a retired driver and haven't been on any trips yet. So 90%+ of my miles are city. And a lot of that has stop signs with no traffic. So I've started to down shift at 9 mph to stop the IMA from turning off the engine at 7 mph for the < 1 second at the stop sign. Then I shift to D and then go. I do that because I expect the restarting of the engine every block or 2 would use up the IMA battery and then when I'm sitting at a stop light for a minute or 2 the engine would stay running.

My ? is how long should you expect to be stopped to let the IMA turn off the engine? Is 10 seconds long enough? I expect one minute is enough. The trip mpg goes down very fast with the engine running at a stop light.
__________________
Mike - hypermiler wannabe
2011 Insight LX polished metal
my photography:
To view links or images in signatures your post count must be 2 or greater. You currently have 0 posts.

Fuelly
To view links or images in signatures your post count must be 2 or greater. You currently have 0 posts.
mikejbb is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 11-06-2011, 10:56 PM   #2 (permalink)
Senior Member
 
Join Date: Nov 2009
Location: Boston Area
Posts: 113
Default

I'd advise just letting auto-stop kick in regardless of how short the stop. As you decelerate the gas is already shut off to the engine, so you are only extending how long it is stopped by letting it spin down. The amount of battery charge used to restart is small in comparison to the amount it will use in electric assist as you accelerate away from the stop. You'll get a few seconds more engine off time at every stop if you count the time to decelerate from 9 mph, instead of forcing it to run at 9 mph a below. All that shifting is likely to cause more wear on the CVT than allowing the car do what it was designed to do. My advice is to relax and enjoy the auto-stop, its one of the fun parts of a hybrid
__________________
2010 EX Sky Blue since 11/2/09
insightfulone is offline   Reply With Quote Quick reply to this message
Old 11-08-2011, 10:23 AM   #3 (permalink)
Junior Member
 
Join Date: Oct 2011
Posts: 1
Default Engine stop IMA

I tell people that the engine shutting off when you stop is the "cutting edge of golf cart technology"
mfedorov is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 11-09-2011, 01:43 PM   #4 (permalink)
Senior Member
 
Join Date: Jan 2011
Location: Denver, Colorado
Posts: 350
Default

The programming in the IMA system won't let the battery get so low that it wouldn't restart the engine. If the charge got that low, you wouldn't get auto stop. There are times I do as you do and don't let the car idle stop just so the drive is smoother, like in parking lots and lost of close stop signs.
kjanracing is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Tags
mpg

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Insight Central: Honda Insight Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in


Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Powered by vBadvanced CMPS v3.2.3

All times are GMT -4. The time now is 10:37 PM.



Powered by vBulletin® Copyright ©2000 - 2019, vBulletin Solutions, Inc.
User Alert System provided by Advanced User Tagging (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.