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Using air conditioning as additional descent brake
22 Oct 2015 16:08 - 22 Oct 2015 16:10 #154182
by Bosanek
Using air conditioning as additional descent brake was created by Bosanek
Hello!
I am wondering if anyone else came to the same idea as I have.
In other words, I am either genius or idiot, and I would like to confirm which one of those
.
Everyone knows that using air conditioning increases fuel consumption, because the coolant compressor (when it's running) is mechanically connected/engaged to the engine, so it shares part of the mechanical power which the engine produces.
Therefore, I was thinking if the opposite effect would exist - when the car is going downhill and the engine is braking, would the air conditioning compressor utilize part of the braking power, or not.
So I tried my theory on a normal tarmac road which has a stable descent gradient which is several km long.
To shorten the story - I noticed that the car descends down approx 12% slower then I turn on air conditioning!
So, am I correct if I state that air conditioning does indeed "soak" a part of the kinetic energy which strains the engine and the transmission when it's braking downhill, or not?
Considering all this,
I was wondering if it would be wise to use air conditioning as a slight additional braking aid when performing steep offroad descents in 1st low gear?
Has anyone practiced this and how much effect does it give in real world?
Would this practice be harmful (in short terms or in long terms) to the coolant compressor, to the engine itself, or to other components (like the belt, etc.)?
I am wondering if anyone else came to the same idea as I have.
In other words, I am either genius or idiot, and I would like to confirm which one of those
.Everyone knows that using air conditioning increases fuel consumption, because the coolant compressor (when it's running) is mechanically connected/engaged to the engine, so it shares part of the mechanical power which the engine produces.
Therefore, I was thinking if the opposite effect would exist - when the car is going downhill and the engine is braking, would the air conditioning compressor utilize part of the braking power, or not.
So I tried my theory on a normal tarmac road which has a stable descent gradient which is several km long.
To shorten the story - I noticed that the car descends down approx 12% slower then I turn on air conditioning!
So, am I correct if I state that air conditioning does indeed "soak" a part of the kinetic energy which strains the engine and the transmission when it's braking downhill, or not?
Considering all this,
I was wondering if it would be wise to use air conditioning as a slight additional braking aid when performing steep offroad descents in 1st low gear?
Has anyone practiced this and how much effect does it give in real world?
Would this practice be harmful (in short terms or in long terms) to the coolant compressor, to the engine itself, or to other components (like the belt, etc.)?
Last edit: 22 Oct 2015 16:10 by Bosanek.
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22 Oct 2015 16:26 - 22 Oct 2015 16:28 #154183
by Halford
Replied by Halford on topic Using air conditioning as additional descent brake
:laugh: :laugh: :laugh:
Bosanek, are you a research student with too much time on your hands ?
after you publish your findings can you discover if the climate is changing because everyone's now got climate control.
Bosanek, are you a research student with too much time on your hands ?
after you publish your findings can you discover if the climate is changing because everyone's now got climate control.
Last edit: 22 Oct 2015 16:28 by Halford.
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- Daniel30
- New Member
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Public
- TomDK
- New Member
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Public
22 Oct 2015 18:38 #154198
by TomDK
Think you're wrong
Replied by TomDK on topic Using air conditioning as additional descent brake
Obarno wrote: I think that when you select 4wd or low it overrides the ability to have the a/c on!
Think you're wrong
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