AC question
#1
#2
Join Date: Mar 2008
Location: Pacific Northwest USA
Posts: 24,920
Received 10,978 Likes
on
7,211 Posts
The a/c compressor run in all climate control modes (except "off") to dehumidify the air. All incoming air is first refrigerated and dehumidified, and then warmed as needed.
In '89-ish, compressor circuits were modified on *convertibles* to make the compressor run at all times even with the switch turned "off". This was for fuel cooling purposes. The fuel cooler is tied into the a/c compressor plumbing. If the compressor doesn't run the fuel cooler will not work.
Jaguar predicted that in hot weather, when fuel cooling is likely to be needed, the driver would have the top down and the mode switch turned to "off"...disabling the compressor. Thus the modified circuit.
Later convertibles had, as I recall, a compressor circuit that engaged the compressor only *if* the fuel reached x-y-z temperature.
I also think later cars had a vent or economy mode which disengaged the compressor. Not quite sure.
Cheers
DD
In '89-ish, compressor circuits were modified on *convertibles* to make the compressor run at all times even with the switch turned "off". This was for fuel cooling purposes. The fuel cooler is tied into the a/c compressor plumbing. If the compressor doesn't run the fuel cooler will not work.
Jaguar predicted that in hot weather, when fuel cooling is likely to be needed, the driver would have the top down and the mode switch turned to "off"...disabling the compressor. Thus the modified circuit.
Later convertibles had, as I recall, a compressor circuit that engaged the compressor only *if* the fuel reached x-y-z temperature.
I also think later cars had a vent or economy mode which disengaged the compressor. Not quite sure.
Cheers
DD
The following users liked this post:
macdoesit (04-16-2013)
#3
The a/c compressor run in all climate control modes (except "off") to dehumidify the air. All incoming air is first refrigerated and dehumidified, and then warmed as needed.
In '89-ish, compressor circuits were modified on *convertibles* to make the compressor run at all times even with the switch turned "off". This was for fuel cooling purposes. The fuel cooler is tied into the a/c compressor plumbing. If the compressor doesn't run the fuel cooler will not work.
Jaguar predicted that in hot weather, when fuel cooling is likely to be needed, the driver would have the top down and the mode switch turned to "off"...disabling the compressor. Thus the modified circuit.
Later convertibles had, as I recall, a compressor circuit that engaged the compressor only *if* the fuel reached x-y-z temperature.
I also think later cars had a vent or economy mode which disengaged the compressor. Not quite sure.
Cheers
DD
In '89-ish, compressor circuits were modified on *convertibles* to make the compressor run at all times even with the switch turned "off". This was for fuel cooling purposes. The fuel cooler is tied into the a/c compressor plumbing. If the compressor doesn't run the fuel cooler will not work.
Jaguar predicted that in hot weather, when fuel cooling is likely to be needed, the driver would have the top down and the mode switch turned to "off"...disabling the compressor. Thus the modified circuit.
Later convertibles had, as I recall, a compressor circuit that engaged the compressor only *if* the fuel reached x-y-z temperature.
I also think later cars had a vent or economy mode which disengaged the compressor. Not quite sure.
Cheers
DD
#4
Join Date: Mar 2008
Location: Pacific Northwest USA
Posts: 24,920
Received 10,978 Likes
on
7,211 Posts
The following users liked this post:
macdoesit (04-17-2013)
#5
Thank you
Thread
Thread Starter
Forum
Replies
Last Post
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)