Kickdown Switch: Diesel & AC System Repair

Hello!
I have a question. I've read several times that diesel vehicles (including manual transmissions) with air conditioning must have a kickdown switch that deactivates the air conditioning when accelerating at full throttle. I'm curious why this only applies to diesels, why it exists at all, and for how long is the air conditioning turned off? After all, it doesn't stay off if I drive on the highway with my foot heavily on the accelerator for a while.

Thank you for your answers!

pretzelman01

Climate compressor shut-off:
To reduce the load on the engine, the...
Engine control unit controlling the air conditioning compressor in the following cases:
Terms and conditions apply:
after each startup process, for approximately 6 seconds.
during rapid acceleration from low RPMs.
at coolant temperatures above +120°C.
In emergency mode.

Sebastian.

[sewing kit open]

Air conditioning.
To maintain a comfortable temperature inside when the outside temperature is high,
to maintain a comfortable indoor temperature.
Does the air conditioning system cool the air inside the vehicle?
using a climate compressor.
(10) off. Its power consumption can...
depending on the engine and driving conditions, up to 30%.
The engine power is X horsepower.
As soon as the driver fully depresses the accelerator pedal...
pressed or quickly activated (and thus...)
So, if you want maximum torque,
can the air conditioning compressor be temporarily disconnected from the?
Motorsteuergerät abgeschaltet werden. Because of that.
Does the full engine power apply to...?
Antrieb zur Verfügung. Since it's only for a short time...
When it is turned off, this has no noticeable effect.
Influence on the interior temperature.
of the vehicle.

[sewing box closed]

'With centrifugal compressors, the output can be reduced to generate only the required cooling capacity. Conventional compressors can be switched off intermittently if constant full-load operation is required. Of course, maintaining the desired internal temperature takes priority.'


CU Gremlin.

With centrifugal compressors, the performance can be reduced to the point where only the required cooling capacity is generated. Conventional compressors can be switched off temporarily if constant full motor load is required. Of course, maintaining the internal temperature takes precedence...


CU Gremlin

Hello Gremlin,

Can you tell me what type of compressor is installed in my system?
I drive a G4 manufactured in December 2001 with an ALH engine, 66 kW of power, and climate control.
I once read that the compressor shuts off when the outside temperature is below 5 degrees Celsius to prevent evaporator icing.
If I turn on my air conditioner when the temperature is below 5 degrees Celsius, it still runs (according to the MFA, fuel consumption increases). This can only be due to the controllable compressor, right?
Who knows?

Regards,

Eike.

My Audi 100 AAT (built in 1992) doesn't switch off when I give it full throttle at low RPMs. Instead, it seems to increase the fuel injection amount beyond what is normal, and then it smokes much more than usual when starting from a standstill.
I'm not sure if this is supposed to be the case with this model or if it's a bug.
Christian.

I've previously owned two cars with air conditioning: an Audi 100 (Type 44) with a gasoline engine (NF), and a Golf TDI.

In both cases, you can experience heatstroke in the summer when driving at full throttle on the highway . And that's not just because of the driving style. Nothing is activated again to improve the interior climate.

Hi!
I just wanted to briefly share my experience. Today, I temporarily connected an LED in parallel with the air conditioning compressor to observe the control of the magnetic clutch during operation. I was surprised: I tried every conceivable load and speed combination, but I couldn't detect any deactivation of the compressor!
This is a manual air conditioning system in a Polo 1.4 TDI.

bye
pretzelman01