Air-Con.

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TLicense
Posts: 42
Joined: Wed Jun 18, 2008 7:33 am

Air-Con.

Post by TLicense » Sat Oct 25, 2008 12:58 am

Probably one for Ryan...

How did you get the air-con working with the JZA80? Did you just by-pass the ECU completely and connect what would be the air-con clutch output of the stock ECU to the ECU input feed from the air-con switch? If so does the fact that you've not got the means of offsetting the engine speed by a little at idle not cause a problem, or does the closed loop just sort this out automatically by adding a little extra duty?

Would it be possible to route feed for the switch from something like the windscreen heater output (unlikely to be used in a road car application) and just ensure that it only turns on when the coolant temp and revs are within certain conditions? This way it would be possible to auto turn off over say 5000rpm, similar to how the stock ECU turns it off when above 80% throttle?

Cheers,

Tony

Ryan.g
Syvecs Staff - Caretaker
Posts: 278
Joined: Fri May 30, 2008 3:05 pm

Re: Air-Con.

Post by Ryan.g » Sat Oct 25, 2008 8:29 am

Hey Tony

The aircon is driven straight from the Solaris unit. You cant just connect the aircon switch straight to the Aircon Clutch relay output as the output requires a Gnd to switch the relay which the aircon switch on the heater units doesn't provide. It can be wired up to work with a relay and a pull-up resistor but better to put through the ecu for the facts you stated.

If you didn't want to lose an input and output for the aircon it could be done through an relay for you and the closed loop idle would take care of it.

Ryan

TLicense
Posts: 42
Joined: Wed Jun 18, 2008 7:33 am

Re: Air-Con.

Post by TLicense » Sat Oct 25, 2008 9:08 am

Cool. Which output are you using to control it though? I can't see anything particularly suitable???

Cheers

Tony

Ryan.g
Syvecs Staff - Caretaker
Posts: 278
Joined: Fri May 30, 2008 3:05 pm

Re: Air-Con.

Post by Ryan.g » Sat Oct 25, 2008 5:26 pm

Brake by Wire

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