Reply
 
Thread Tools Display Modes
 
Old 02-15-2018, 12:54 AM   #1
BBQ
Platinum Member
 
Join Date: May 2016
Location: East
Posts: 2,215
Default Sprinter Smart Alternator

.

Interesting article

Mercedes Sprinter Alternator: Voltage, Amperage Under Real Loads at Idle, Charging Rate for Lithium Battery

https://windinmyface.com/Sprinter-Al...r-Primary.html


__________________

__________________
BBQ is offline   Reply With Quote
Old 02-15-2018, 01:11 AM   #2
Site Team
 
avanti's Avatar
 
Join Date: Jul 2013
Posts: 2,233
Default

Seems mostly reasonable. Two things, though:

1) I take exception to the statement that a second-alternator is "easier install on the 6 cylinder engine than the 4 cylinder". My only experience is with the 4 (and I assume that the author's only experience is with the 6), however, my understanding is that with the 6, you have to relocate some cooling hoses, which is a pain. The 4 is a simple bolt-on (except for having to tap one existing hole).

2) The alternator on the 6-cylinder Sprinter is not overly "smart" by modern standards. It is true that it is LIN controlled, but the design has been used for a long time. In contrast, the I4 has much more elaborate charging system, with sensors mounted right on the battery, and control algorithms that optimize charging according to instantaneous engine demand, using a strategy akin to regenerative braking. It would be very interesting to have this kind of thorough, data based analysis of the I4's charging abilities. Based on my limited experience, I suspect that it would be much less favorable.
__________________

__________________
Formerly: 2005 Airstream Interstate (Sprinter 2500 T1N)
Now!: 2014 Great West Vans Legend SE (Sprinter 3500 NCV3 I4)
avanti is online now   Reply With Quote
Old 02-15-2018, 01:14 AM   #3
Platinum Member
 
Join Date: Aug 2010
Posts: 5,709
Default

I made a couple of pages and bailed.

He is calling the battery capacity in AMPs instead of AH, so his tech credibility is immediately questioned for me.

He is trying to impress everyone with his knowledge so he can get consulting business.

Too much idling and many cold starts which will not be liked by the EGR and DPF. Better longer runs to have the engine warmer, less soot, less oil dilution than cold starts.

He isn't leaving head room at the top of the charge SOC.

He is leaving the batteries connected once charged and wants to float them, which nearly everyone says is bad. Recommended is to disconnect charging, run off batteries to a set recharge level some %SOC down, and then recharge and shut off again.

He can't see his coach battery voltage while driving, but he is an expert on all things charging?

Not particularly impressed myself.
booster is offline   Reply With Quote
Old 02-15-2018, 06:43 PM   #4
Platinum Member
 
Join Date: Feb 2016
Location: Portland, Oregon
Posts: 758
Default

But, but, but he is from Palo Alto so he is electrically shmart by proximity.

Battery capacity in A is like - I just bought a 1000 SF house in Palo Alto for $25K /month.
__________________
George
2013 Sprinter VOILA
https://goo.gl/photos/2NCR3teXLSwNYSwN8
GeorgeRa is online now   Reply With Quote
Old 02-16-2018, 01:49 PM   #5
Platinum Member
 
Join Date: Feb 2013
Posts: 146
Default

I think he is right about the 2nd alternator being an easier installation on the 6 cylinder Sprinter. Sportsmobile North even told me that they wouldn't install a 2nd alternator on a 4 cylinder. If I remember right, they said that it requires some kind of a odd belt tensioner (I may be wrong about the reason). My 6 cylinder 2nd alternator looks very straightforward and works well. It is probably a moot point anyway depending on what is available now for Sprinters.
jrobe is offline   Reply With Quote
Old 02-16-2018, 09:26 PM   #6
Site Team
 
avanti's Avatar
 
Join Date: Jul 2013
Posts: 2,233
Default

Quote:
Originally Posted by jrobe View Post
I think he is right about the 2nd alternator being an easier installation on the 6 cylinder Sprinter. Sportsmobile North even told me that they wouldn't install a 2nd alternator on a 4 cylinder. If I remember right, they said that it requires some kind of a odd belt tensioner (I may be wrong about the reason). My 6 cylinder 2nd alternator looks very straightforward and works well. It is probably a moot point anyway depending on what is available now for Sprinters.
The "odd belt tensioner" comes with the Nations' kit and bolts right on. Nothing odd about it at all. As I said, my understanding is that V6 requires relocating coolant hoses, which the I4 does not.
__________________
Formerly: 2005 Airstream Interstate (Sprinter 2500 T1N)
Now!: 2014 Great West Vans Legend SE (Sprinter 3500 NCV3 I4)
avanti is online now   Reply With Quote
Old 02-25-2018, 01:09 PM   #7
Bronze Member
 
Join Date: Feb 2018
Location: NC
Posts: 25
Default

For what it is worth, He lost me when he is talking about running at idle the MB diesel for extended periods.

From what I've read of Mercedes actual published docs, they say 5-6 minutes idle maximum or your will clog up the pollution sensors/gear and throw and error code. A friend had to take his to MB to have then clear it!
CleanLivin is offline   Reply With Quote
Old 02-25-2018, 02:00 PM   #8
Site Team
 
avanti's Avatar
 
Join Date: Jul 2013
Posts: 2,233
Default

Quote:
Originally Posted by CleanLivin View Post
For what it is worth, He lost me when he is talking about running at idle the MB diesel for extended periods.

From what I've read of Mercedes actual published docs, they say 5-6 minutes idle maximum or your will clog up the pollution sensors/gear and throw and error code. A friend had to take his to MB to have then clear it!
I have NEVER seen such a statement in an actual Mercedes document--nothing even close. Do you have a reference?

I do not advocate extended idling, but as far as I can tell, it is just false that MB proscribes it. What they DO say is that extended start-and-stop driving has to be balanced by a period of highway driving in order to allow the DPF to regen. I presume that this applies to idling as well.
__________________
Formerly: 2005 Airstream Interstate (Sprinter 2500 T1N)
Now!: 2014 Great West Vans Legend SE (Sprinter 3500 NCV3 I4)
avanti is online now   Reply With Quote
Old 02-28-2018, 08:05 PM   #9
Platinum Member
 
Boxster1971's Avatar
 
Join Date: Mar 2012
Location: Maryland
Posts: 600
Default

Quote:
Originally Posted by avanti View Post
I have NEVER seen such a statement in an actual Mercedes document--nothing even close. Do you have a reference?

I do not advocate extended idling, but as far as I can tell, it is just false that MB proscribes it. What they DO say is that extended start-and-stop driving has to be balanced by a period of highway driving in order to allow the DPF to regen. I presume that this applies to idling as well.

There is a 5 minute idle limitation mentioned in the latest biodiesel publication from Mercedes. It recommends the 5 minute limit if you must use biodiesel blends of 5-20%.
https://www.mbusa.com/vcm/MB/Digital..._Brochure5.pdf


- - Mike
2012 Sprinter 3500 Extended converted B-Van by Airstream
__________________
2013 Airstream Interstate Lounge EXT on 2012 Sprinter 3500 170Ext
Formerly: 1973 Dodge B300 DIY pop-top conversion
Boxster1971 is online now   Reply With Quote
Old 02-28-2018, 08:30 PM   #10
Site Team
 
avanti's Avatar
 
Join Date: Jul 2013
Posts: 2,233
Default

[QUOTE=Boxster1971;68399]There is a 5 minute idle limitation mentioned in the latest biodiesel publication from Mercedes. It recommends the 5 minute limit if you must use biodiesel blends of 5-20%.
https://www.mbusa.com/vcm/MB/Digital..._Brochure5.pdf
/QUOTE]

Yes, that text was added in the 2015 edition of that document. It was not there in 2010.

Using >B5 is a whole separate issue.
__________________

__________________
Formerly: 2005 Airstream Interstate (Sprinter 2500 T1N)
Now!: 2014 Great West Vans Legend SE (Sprinter 3500 NCV3 I4)
avanti is online now   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not 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 Off
Pingbacks are Off
Refbacks are Off


» Featured Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3

All times are GMT. The time now is 02:20 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2018, vBulletin Solutions, Inc.