| [GMCnet] re...electronic choke [message #61847] |
Mon, 26 October 2009 20:40  |
sperline
Messages: 7
Registered: February 2004
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Junior Member |
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As I reported the electronic choke appeared to act in reverse. I was able to remove the spring and reverse it and it now seems to work somewhat ok. Maybe I need to fine tune the choke a bit. When I turn the key on, step on and then off the accelerzator, but do not start the engine, the choke spring heats and gradually moves the choke from full on to off. This choke is the electronic unit fron napa mentioned here on this list and using the part interchange part number ....thanks for everyone's help so far....Brian 77 ele 455
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| Re: [GMCnet] re...electronic choke [message #61892 is a reply to message #61847] |
Tue, 27 October 2009 03:13  |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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| sperline wrote on Mon, 26 October 2009 20:40 |
As I reported the electronic choke appeared to act in reverse. I was able to remove the spring and reverse it and it now seems to work somewhat ok. Maybe I need to fine tune the choke a bit. When I turn the key on, step on and then off the accelerzator, but do not start the engine, the choke spring heats and gradually moves the choke from full on to off. This choke is the electronic unit fron napa mentioned here on this list and using the part interchange part number ....thanks for everyone's help so far....Brian 77 ele 455
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Since I try not to buy things from NAPA due to their pricing and poor warranty procedures, and did not buy my electric choke there I am not sure what choke you have but...
There are types of electric chokes out there.
One does NOT have a thermistor mounted on the intake manifold and usually has only one wire plugged into the choke. If this is what you have then the choke is acting exactly the way it should.
The second type has two wires plugged into the choke and uses a thermistor on the intake manifold to control it. If this is the type you have, then you have a wiring error on the ground side of the choke or a bad thermistor.
Ken B.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| [GMCnet] Inverter generator [message #61895 is a reply to message #61892] |
Tue, 27 October 2009 06:46 |
Jim Bounds
Messages: 842
Registered: January 2004
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Here is a post I put out a number of days ago about using an inverter styled generator. I did not see it post, if it did sorry for resending it but I thought you guys might be interested:
Funny you should ask. With the demise of the Honda water cooled series which reallt broke my heart-- I havwe been looking around and have found some interesting things.
The bad press that generac has on their inverter units is correct, I do not like those units and have stayed away from them-- having a Briggs motor may be OK for a lawn mower but it bugged me when I saw a pot metal flywheel/ring gear chewed up gor no reason. Man, thats cheapness and I just had a problem with the inverter design. Inverters are traditionally not as reliable as I would like them to be.
OK, I said that and am about to eat some of those words. There is a new inverter technology "pulse digital inversion". There are several companies putting this design into generators, the tachnology came from other industries. it is a very efficient DC-AC conversion technology (reported to be 90% efficient). With this, the units that are coming out use a very weene motor connected to a small alternator pushing this very efficient inverter design.
I said funny you should ask because Saturday I delivered an Airstream coach that we have been designing in one of these generators into. It was rated at 3000 watts, a 270 cc motor, electric start, has a key fob remote control, air cooled, super efficient and pretty darn quiet. After staring at specs for weeks, you have to pull back the bow and shoot and thats what we did!
Inverter design generator are unique and have unique criteria. You need to use a rotary compressor roof AC unit, inverter design generators do not like sudden heavy loads-- they like to easy into their work-- The unit would not push a piston design AC unit but would do a 13.5K BTU rotary compressor Pinguin just fine if you did it right. For you techno guysm, this should give you pleasure-- setting it up right, I look it like throwing Goliath's spear with davids tosser!
We had all sorts of challenges, heat disipation, exhaust, adaption of hardware but in the end, it worked and I think the technology is here and will do the job-- especially if we use it intellegently. The folks I'm working with are actually coming out with a water cooled 5500 watt pulse digital inverter design unit in the spring-- man I'll be all over that puppy!
It takes stepping outside the box today to find new solutions, generator technology is about to explode-- the old constand speed monsters are about to meet extinction. Good ridance--- sorry but I really loath what Onan is trying to perpatrate upon us and I want better!
Next, I want to engineer the water cooled 5500 watt job into my 23' coach-- oh man, that will be a sweet bite! If you have a Honda 6010, take care of that puppy, it is the target-- it's on my top and now we have to shoot to beat it-- a tough goal.
So yes, I am looking at inverter generator-- not Generac! There are new things out ther, new things coming so stay tuned!
BTW, the 3000 watt unit we built in had a cost of @ $1000. Hey, it it does only last a couple of seasons it's not like a Timex watch, you can replace it cheaply so why worry about how long it lasts! Thats where the Generac falls short, it costs less than an Onan but not that much. It all comes down to $, everything does and now generators are uning the technology to go the way of consumer electronics that I used to be in. They make a radio today for $100 that blows away what we used to sell for 5 times the cost. that industry is now throw away and thats where the generator industry is going. You really need to stay tuned to this one!
Jim Bounds
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| Re: [GMCnet] Inverter generator [message #61906 is a reply to message #61902] |
Tue, 27 October 2009 08:03 |
Jim Bounds
Messages: 842
Registered: January 2004
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Yes, the industry is looking now at "niche" markets and wether we think so or not, the RV industry is niche to those folks. The one we put in kinda looks weird, sort of like hooking up the drive wheel of a race car to turn a grismill-- but it worked great! Did exactly what we needed1 I expect them coming up with more installer friendly units for our application.
Specs are kinda weird over there-- don;t believe what you read, I figured if it would do 2/3 of what is stated that I would be OK and it did.
I'm looking to the folks I'm working with foar as I said a water cooled 5500 watt RV generator in the spring-- that would be awesome. If you think about it, driving you really do not need full access to run all appliances on board all at the same time, we can do with less and heck, for @ $1000 ther price is right!
I posted a few pics of the finished coach on my site this morning if you are interested. We'll see what the long term viability of the unit will be, it will get a real workout in the coach I put it in!
Jim Bounds
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----- Original Message ----
From: Ron Kazi <gmcmhron@optonline.net>
To: gmclist@temp.gmcnet.org
Sent: Tue, October 27, 2009 9:56:14 AM
Subject: Re: [GMCnet] Inverter generator
FYI-
I got this from Kipor today after I followed up on a message I sent them a
while back.
Ron and Julie
Dear Ron:
Thank you for your suggestion. We have the plan to develop RV genset in
future.
Nancy Zhang
Wuxi Kipor Power Co., Ltd.
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| Re: [GMCnet] re...electronic choke [message #62251 is a reply to message #62013] |
Thu, 29 October 2009 01:05 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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| sperline wrote on Tue, 27 October 2009 20:05 |
I have the 2 wire choke with the black box(thermistor) as u call it mounted on the intake manifold...This unit was pictured on the gmc photo page. What makes you think this thing is defective...Brian
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On a two wire choke with a thermistor, the thermistor is suppose to change resistance based on the heat it senses. This resistance change varies the voltage supplied to the heater in the choke. The hotter the thermistor the more voltage that is supplied to the heater. The heat generated causes the bi-metal spring to open the choke as it get warmer.
On a cold engine the thermistor resistance should be high and there should be very little heat generated. The bi-metal spring should not move very much. Since yours moves immediately when the power is turned on I assume you either have a short to ground (eliminating the thermistor from the circuit) or that the thermistor is not doing it job. Both of these will cause full voltage on the spring and cause rapid opening of the choke.
HTH
I hope I did not make too many typos in this post. I sliced my finger open with a razor knife tonight while cutting a new hose for my airplane. This makes tying rather difficult.
Ken B.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: [GMCnet] re...electronic choke [message #62268 is a reply to message #62251] |
Thu, 29 October 2009 07:37 |
fred v
Messages: 999
Registered: April 2006
Location: pensacola, fl.
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[/quote]
On a two wire choke with a thermistor, the thermistor is suppose to change resistance based on the heat it senses. This resistance change varies the voltage supplied to the heater in the choke. The hotter the thermistor the more voltage that is supplied to the heater. The heat generated causes the bi-metal spring to open the choke as it get warmer.
On a cold engine the thermistor resistance should be high and there should be very little heat generated. The bi-metal spring should not move very much. Since yours moves immediately when the power is turned on I assume you either have a short to ground (eliminating the thermistor from the circuit) or that the thermistor is not doing it job. Both of these will cause full voltage on the spring and cause rapid opening of the choke.
Ken B. [/quote]
if i understand what you are saying then when you shut off a hot engine and then crank back up the choke will still go closed but will get full voltage when the ignition is turned on.
so, does this unit open the choke faster when hot than the "one wire" unit does? they are both getting full voltage or is the bi-metallic spring different?
Fred V
'77 Royale RB 455
P'cola, Fl
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| Re: [GMCnet] re...electronic choke [message #62329 is a reply to message #62268] |
Thu, 29 October 2009 13:21 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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| fred v wrote on Thu, 29 October 2009 07:37 |
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if i understand what you are saying then when you shut off a hot engine and then crank back up the choke will still go closed but will get full voltage when the ignition is turned on.
so, does this unit open the choke faster when hot than the "one wire" unit does? they are both getting full voltage or is the bi-metallic spring different?
[/quote]In theory they both should open at the same rate when the engine is hot. Also if the engine is hot there is probably enough ambient heat around that neither one will close in the first place. If it does close it will take a while.
Ken B.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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