max Verbrauch 6.Gang beim ASZ? | Posts 32+

"Klima" was always focused on "Econ" during the checks.
Tomorrow you will know more...

Hi Ulf,

Okay, I went home.

With Climatronic activated, there is no change in fuel consumption when accelerating fully. I believe the engine control unit (ECU) deactivates the air conditioning at full throttle, as there is no noticeable jerk when turning on the air conditioning during full acceleration. However, I have tested driving at a constant speed of approximately 80 km/h using the cruise control on a very long, straight road. In this case, the fuel consumption is consistently around 2.9 liters. When the air conditioning is turned on, the fuel consumption immediately increases by 0.2 liters. Furthermore, when accelerating moderately with the air conditioning on, and then doing the same without it, I have the impression that, at the same pedal position and on a nearly identical stretch of road, the fuel consumption is always 0.1 to 0.3 liters higher when the air conditioning is on. I'll probably put the laptop in the car on Saturday and use VAG-COM to check some things during a long drive.

I also took a short quiz yesterday and attempted it three times.
1. Try to get the most out of everything, aiming for a full score of 1700, resulting in a score of 15.1.
2. + 3. Attempt: Climate control from 1700, full power both times, 15.0 on both occasions. However, I suspect that the 0.1 value is lost again within the range of the MFA (Mean Flow Air). There wasn't a noticeable difference in the route; at most, it was only about 10 meters.
I kept driving in the same direction between two places, and after a certain point, I started going uphill until I reached the next town sign. The speedometer always shows the same speed.

Calvin wrote:

1. Try to get the most out of everything, aiming for a full score of 1700, resulting in a score of 15.1. 2. + 3. Try climate from 1700, full pull 15.

Both times.
Aha... Matthias' observations are going in the same direction.

According to this, the maximum [setting/value] does not seem to be used in climate control mode. The amount of fuel injected is not necessarily increased, but rather, when driving at full throttle, the air conditioning might be temporarily turned off "as a last resort," which is something I seem to recall.

Quote:

but rather, in a full-throttle situation, the air conditioning might be briefly turned off "as a last resort," which is something I also have in the back of my mind

.
Correct.
However, this only applies to externally regulated compressors, such as those found in the 9N, NOT in the Golf IV, whose compressor is, as far as I know, internally regulated.

Roger wrote:

Quote: but rather, in a full-throttle situation, the air conditioning might be briefly turned off "as a last resort," which is something I also have in the back of my mind . Correct. However, this only applies to externally regulated compressors, such as in the 9N, NOT in the Golf IV, whose compressor is, as far as I know, internally regulated...

Well, uh... does the air conditioning continue to run on a Golf IV even when the accelerator is fully pressed?

Then the climate control system should become noticeable, for example, during the DZR test?

"When I accelerate fully, the compressor definitely cuts out after more than 2 seconds. I even installed an LED to test this. However, it rarely kicks in during normal driving conditions due to the outside temperatures, and I always have to wait a moment for it to engage." It also doesn't activate at all when you're giving it full throttle and pressing the "Auto" button.

It just leaves me wondering where he gets his information. I unfortunately don't have a wiring diagram for my car, and that's despite having owned it for 27 months... I should probably try to find one somewhere, if someone can point me to a source. But it also shows how happy I've been with the car so far. Now, I've gotten used to the rough idling during the warm-up phase... I've even started to think that it somehow contributes to the morning wake-up process and is therefore probably something that VW specifically developed for that purpose...

Calvin wrote:

But which standard are you referring to? We had previously discussed that some G4 ASZ engines consume 14.5 liters per 100km.

"Sorry for the delayed response."
"By 'my norm,' I mean that the maximum injection quantity calculated through this download is the same as that of my Polo (approximately 56 mg)."

Quote:

Well, uh... does the air conditioning continue to run on a Golf IV even when the accelerator is fully pressed?

I concluded this from the fact that a) under the G IV compressor shutdown conditions, no Pmax shutdown is предусмотрено, and b) the "full load shutdown" feature was presented as completely new in articles about the Polo 9N, and this feature is only available with externally controlled compressors. Also new in the 9N is the design with 2% permanent standby power for the compressor, even when the air conditioning is switched off or in Eco mode. So, completely switching off is not...

Anyone who knows otherwise, please feel free to correct me.

Roger wrote:

Quote: Well, um... does the air conditioning continue to run on a Golf IV even when the accelerator is fully pressed? I concluded this from the fact that a) under the compressor shutdown conditions of G IV, no Pmax shutdown is предусмотрено.

Hmm, what about the "climate compressor intervention" that can be accessed via the engine's actuator diagnosis?

My Golf 3 with the AFN engine had it, my Polo has it, and my wife's ALH-Ibi also has it, if I recall correctly... by the way, all three of them don't have air conditioning.

It seems to be a standard feature .

My current fuel consumption is 17.1 liters per 100 kilometers when driving at full throttle between 180-230 km/h.

Originally, it was 13.9 liters per 100 kilometers.

Hello Ulf,

In these shutdown conditions, I don't see any shutdown occurring. Maximum compatibility with Motronic interface, but that only works with gasoline engines, right?

Compressor discharge code (related to diagnostic channel 19).
Shutdown code
Compressor shutdown condition

0 None.
1. High-pressure event.
2 faulty bulbs + Uist <3V> 118°C.
12 Motronic interface.
13 pages. Terminal 15 > 17V
14 Function: Vaporizer temperature.
15 without vehicle coding.
16 Comp. current.
17 pressure sensors defective (only with external regulation). Compressor)
18 Engine speed (only for B5W8)

Through the control panel, it is actually possible to retrieve information about any reason for deactivation. For example, this can also be observed when the compressor shuts off due to an excessively low outdoor temperature.
But I can always check channel 19 later, at full power, to see if anything is happening.

Roger wrote:

Compressor output code (supplement to diagnostic channel 19). Shutdown code Compressor shutdown condition Bitte gib den Text an, den du übersetzt haben möchtest. But I can later check channel 19 at full power to see if anything is happening.

Is that channel 19 from the climate control computer or the engine control unit?

If you want to check my approach, I think you should monitor the engine control unit (ECU), as the compressor engagement likely originates from there.

How it is implemented in hardware ->

Channel 19 of the Klima (see my technical article).

Roger wrote:

Channel 19 of the Klima (see my article).

Aha, caught you

If the intervention I'm referring to can be activated via the engine control unit, shouldn't it result in a deactivation option under full load (since the engine control unit probably knows best how much power is currently being demanded and whether the power loss would be affected by the air conditioning) - regardless of whether the air conditioning is appropriate at that moment or not .

Unfortunately, I failed to check that. That's most likely to provide clarity, but the possibility needs to exist in the first place... The question is whether it's actually being used, because if it's controlled by a magnetic coupling, shouldn't there be a noticeable jolt each time?