Ac compressor signals

Please may I ask, why do you want to go through the trouble of installing Prius compressor on your insight?
Can you not source the original AC compressor your vehicle was designed for?
I am just asking because that sounds like a lot of work, trying to get a different compressor to run in your vehicle.

Please share more!

 

read the first paragraph again. insight compressor does not run with engine off, gets a bit warm every time you stop

 

Gen3 AC compressor is the same model in CT200H. You can find CT200H service manual in the link I provided below.

 

What year is that Honda Insight?

I've got a vague recollection that the second gen Insight didn't continue to run the AC when the car was at Auto-Stop. The 3rd gen, the new sedan version currently in showrooms, probably does?

All that said, I really doubt you can accomplish your mission, swapping the compressor, AND achieving AC at Auto-Stop, is very likely not possible, for myriad technical reasons, that I can't even begin to fathom.

 

Why not add a reservoir on the high pressure side of the existing system? I'm not positive it would work, but it would be a heck of a lot easier than melding two different systems together.

The evaporator does the cooling work as long as it's got flow through the expansion valve. That valve doesn't care if it is getting live pressure off the compressor, or left over built-up pressure in the line feeding it. If you increase the volume on the HP side, the evaporator can work through longer "compressor naps."

 

Any estimate on how big a reservoir would be needed to cover the duration of a typical engine nap?

I seem to recall that Toyota's compressor model numbers (not the xxxxx-xxxxx part numbers, but the ES18 or whatever on the compressor label) has something to do with the compressor displacement in CCs, and we know it can run at varying speeds from some hundreds to some thousands of rpm.

Could the reservoir fit under the hood, or would it be towed behind the car?

Then, what amount of refrigerant would be the correct charge for that system?

 

Sorry, I had to wait some time to post the link so this is a bit further down than I meant it to be.

CT200H - Service Manual DVD Download Link (same AC system as gen3 prius)

Complete DVD copy with detailed steps for major repairs and troubleshooting and includes wiring diagrams of entire AC system.

https://drive.google.com/file/d/15ts...ew?usp=sharing

Select download, extract, and open the index.html located in brm folder with Internet Explorer or Chrome.

Download size = around 232MB
File size after extraction = around 800MB

PS. you may be lucky and someone here can provide you service manual DVD download specifically for Gen3 prius.

Enjoy
Best Regards.

 

No clue. It's just an idea for a hack... Measure the volume of some pressure-appropriate tubing and braze it in inline with existing run. Then then take a stab at filling the system off of measured pressures & ambient compensation chart instead of measured mass. Measure end result with stopwatch, compare to pre-mod notes.

Worst case he blows up the honda compressor that he's planning to ditch anyway.

The biggest unknown for me is whether the system would also need extra volume added on the low pressure side. I just don't know the system theory well enough to predict that.

 

If the '18' in an ES18 compressor means 18 cc (which I think it might, though I'm not sure just now where I read that), and it's running at, say, 5k rpm, it's pumping refrigerant around 90 liters a minute (if I did the arithmetic right? and brushing off which pressure goes with that figure, 'cause the back of this envelope isn't big enough).

Sounds like a biggish reservoir, if expected nap times are on the order of a minute.

Maybe also a noticeable bump in the budget for refrigerant.

 

Thinking about it more- Yeah, it's the size needed on the low pressure side that would likely sink it. Flow at the expansion valve would fall off pretty fast without enough volume to expand into, and that would wind up being too large of a tank to get to multi-minutes.

The only other cheap hack I can think of is to add mass to the evaporator. It would take longer to go cold at startup, but it would continue absorbing heat during engine naps.

After that? electric compressor, or maybe a trick pulley on the stock compressor incorporating a motor & one-way clutch.

 

Maybe OP's idea isn't so outlandish after all. Just needs maybe some mounting adapters and faked-up CAN commands.

 

[I am going to help all I can, but I doubt it will work, but lets press on!]

I would use the Gen 2 Compressor as the control logic is all on one board.



Starting at 15:10 in this video he describes that controller board until 16:55. (it also serves as the 12 volt 'Alternator' but you don't care)

While the block diagram shows very few inputs to this, the devil will be in the details