LPG conversion on a HCH1 - Insight Central: Honda Insight Forum
 
Go Back   Insight Central: Honda Insight Forum > Hybrid and Alternative Fuel Forum > Other Honda Hybrids Discussion

Insightcentral.net is the premier Honda Insight Forum on the internet. Registered Users do not see the above ads.

» Auto Insurance
» Featured Product
Wheel & Tire Center

Reply
 
LinkBack Thread Tools
Old 12-24-2012, 08:23 AM   #1 (permalink)
Member
 
Join Date: Nov 2012
Location: Milton Keynes
Posts: 35
Default LPG conversion on a HCH1

How suitable is the HCH1 for lpg conversion?

My other car, a Suzuki Ignis which has had LPG conversion done on it.

Wondering what things I should consider when trying to LPG convert the Civic Hybrid.

I can think of :
* Auto Stop- When car starts back from auto stop, if engine is warm it should start directly on LPG instead of on petrol and then switching to LPG.

* Lean Burn- Not sure if LPG ECU would be able to handle this.

* IMA C&C- assuming it would still work with no changes.

Last edited by aandu; 12-24-2012 at 08:50 AM.
aandu is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 12-24-2012, 09:21 AM   #2 (permalink)
Senior Member
 
samwichse's Avatar
 
Join Date: Mar 2010
Location: Edge of The Nothing
Posts: 2,183
Default

IMAC&C should work fine unless you completely change out the ECU somehow and the new one is hybrid-dumb (doesn't communicate with the MCM in back). Is this a chipping situation, or do you have a completely new ECU?

Lean burn: You're going to have to give that up, I I think.
__________________
2004 Honda Civic Hybrid "Eeyore" @ 50 mpg
-MaxIMA battery from Bumblebee
-OBDIIC&C
-IMAC&C
-Lower grill block

RIP 2000 Insight, 40k miles @ 69.2 mpg

2000 Insight, "The Basket Case" @178k miles, 64.5 mpg so far

Last edited by samwichse; 12-24-2012 at 02:05 PM.
samwichse is online now   Reply With Quote Quick reply to this message
Old 12-24-2012, 10:54 AM   #3 (permalink)
Member
 
Join Date: Nov 2012
Location: Milton Keynes
Posts: 35
Default

The HCH ecu remains untouched. A separate LPG ECU which acts as a slave to the HCH ECU is added. The LPG ecu would issue its own slightly modded instructions to the LPG system based on whatever the HCH ECU does.

Quote:
Originally Posted by samwichse View Post
Lean burn: You're going to have to give that I I think.
I don't quite understand this line.
aandu is offline   Reply With Quote Quick reply to this message
Old 12-24-2012, 02:05 PM   #4 (permalink)
Senior Member
 
samwichse's Avatar
 
Join Date: Mar 2010
Location: Edge of The Nothing
Posts: 2,183
Default

I think I dropped the word "up" let me fix that

Doubt you'll be able to have lean burn.

If you're just piggie-backing another ecu on, I don't see why the IMAC&C wouldn't work.

Sam
__________________
2004 Honda Civic Hybrid "Eeyore" @ 50 mpg
-MaxIMA battery from Bumblebee
-OBDIIC&C
-IMAC&C
-Lower grill block

RIP 2000 Insight, 40k miles @ 69.2 mpg

2000 Insight, "The Basket Case" @178k miles, 64.5 mpg so far
samwichse is online now   Reply With Quote Quick reply to this message
Old 12-24-2012, 03:21 PM   #5 (permalink)
Administrator
 
Join Date: Dec 2005
Location: Mappleton. East Riding of Yorkshire.
Posts: 7,391
Send a message via MSN to retepsnikrep
Default

IMAC&C will work if the ECM and MCM remain connected via the MOTA line in the same way as standard. So it won't care about LPG or otherwise.
__________________
Pcb's/Kits/Built Units for ObdIIc&c, Imac&c, SimpleCycler, ImaBoost, Current Hacks & HCH1 Fan available.
Enqs to 150mpg[at]gmail.com
retepsnikrep is offline   Reply With Quote Quick reply to this message
Old 12-24-2012, 07:35 PM   #6 (permalink)
Senior Member
 
Join Date: Jan 2009
Location: Chapel Hill, NC
Posts: 610
Default

My LP gas conversion experience is limited to carburetor fed engines only. Fuel injected engines appear to require additional controls.

The LP gas conversion carburetor is a simple perforated venturi through which the vaporized LP/gas is drawn into the intake manifold. Gas flow through a vacuum switch controlled solenoid valve feeds a vaporizer/regulator which may or may not allow starting the engine on LP gas depending on its design. The vacuum switch which responds to intake manifold pressure is bypassed during start up to allow gas to flow with engine stopped. Gas flow will be cut off at Auto Stop (no vacuum) and restarting after Auto Stop will have to sequence the start up process each time.

Most LP gas converted engines will be set to run slightly rich to lessen the possibility of burning the exhaust valves. Lean burn may best be avoided or require a change in exhaust valve metallurgy such as stellite.
Hugh-Falls is offline   Reply With Quote Quick reply to this message
Old 01-04-2013, 06:44 AM   #7 (permalink)
Member
 
Join Date: Nov 2012
Location: Milton Keynes
Posts: 35
Default

Just had confirmation that lean burn would be possible.


The LPG ECU would mimick what the petrol ECU does. So if petrol ECU says "shutdown two cylinders", the LPG would follow suit. Or at least that's the theory!

Might be doing the conversion in the next 2-3 weeks. Shall report on how it goes.
aandu is offline   Reply With Quote Quick reply to this message
Old 01-04-2013, 07:13 AM   #8 (permalink)
Senior Member
 
Join Date: Jan 2009
Location: Chapel Hill, NC
Posts: 610
Default Lean Burn

It appears that at this point in the discussion there needs to be a definition of what constitutes "lean burn" in the specific engine under consideration.
Hugh-Falls is offline   Reply With Quote Quick reply to this message
Old 01-04-2013, 10:38 AM   #9 (permalink)
Member
 
Join Date: Nov 2012
Location: Milton Keynes
Posts: 35
Default

Quote:
Originally Posted by Hugh-Falls View Post
It appears that at this point in the discussion there needs to be a definition of what constitutes "lean burn" in the specific engine under consideration.
I agree. Not really sure if lean burn is activated by lower AFR to all cylinders or in addition to lower AFR, some cylinders are shut off as well.
aandu is offline   Reply With Quote Quick reply to this message
Old 01-04-2013, 11:08 AM   #10 (permalink)
Administrator
 
Join Date: Dec 2005
Location: Mappleton. East Riding of Yorkshire.
Posts: 7,391
Send a message via MSN to retepsnikrep
Default

The HCH1 does not shut down any cyclinders when in lean burn, it affects all of them and is a general leaning of the mixture.

The HCH1 does shut off the valves on three of the four cylinders on the overun when the injectors are not operating. It does this to improve regen effeciency.
__________________
Pcb's/Kits/Built Units for ObdIIc&c, Imac&c, SimpleCycler, ImaBoost, Current Hacks & HCH1 Fan available.
Enqs to 150mpg[at]gmail.com
retepsnikrep is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

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

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



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 v3.2.2

All times are GMT -4. The time now is 05:33 AM.



Powered by vBulletin® Copyright ©2000 - 2014, vBulletin Solutions, Inc.

Content Relevant URLs by vBSEO 3.3.2