More fuel consumption during winter caused by the additional heating.

[on4ajg]

Hello,

It seems that the fuel consumption is about 0.5-0.75 l/ 100 KM higher when it gets colder.
Once the temperature is below 8-9 degrees, the "additional heating" is starting to work, and you can see on the screen a little higher consumtion.
You can also see and hear this "additonal heating" working when you look under the car, somewhere in the middle, where in a "normal car" the gear-box is situated, you can see a little exhaust-pipe, which is smoking when the motor is running.
There is also an additional fuel-line coming from the tank, and going to the "box" in which is the "additional heating"placed.
You can also find a description of the additional heater on the CD.

Greatings,

Erwin.

[Manu]

Originally Posted by on4ajg

It seems that the fuel consumption is about 0.5-0.75 l/ 100 KM higher when it gets colder.
Once the temperature is below 8-9 degrees, the "additional heating" is starting to work, and you can see on the screen a little higher consumtion.

I was not able to see how much it consums. However, I think we should be able to activate or deactivate it when we really need it (starting it as soon as we unlock the doors for instance, and prevent it from working when I start the engine for a few seconds to put my car back into my garage).

Anyway, does anybody know exactly how it is supposed to work (temperature, duration, etc...) ?
I drove for more than 500 kms today and I was a bit surprised to still hear the additional heater when I arrived bact at home. It seems to me that additional heater might only be useful for the first kilometers when the engine is still cold, then the heat produced by the engine should be sufficient to heat the car, isn't it ? EV2 with a petrol engine don't have this heater and they are able to heat the car however...

[Werner807HDI]

Hi folks,

the additional heating system is only in newer diesel engines because the
efficiency of these engines is on a very high level. So they produce not enough heat to warm the inner room. For example the Smart´s average engine temperature at the diesel engines is about 75°C. This is too little to have a pleasant climate in wintertime.

[DirkS.]

Originally Posted by Manu

I drove for more than 500 kms today and I was a bit surprised to still hear the additional heater when I arrived bact at home.

This is not a good thing ! If this was true (and I suppose it is,i just couldn't check it to date), we just blow off diesel for nothing. After max. 10 minutes, the temperature produced by the engine is sufficient to heat the interior . I really would like to have the option to switch that thing off...there's really no use to have it operating permanently just because the temperature is below 10 degrees (I think that could be the activation temperature).

[MINI_PHEDRA]

Originally Posted by DirkS.

This is not a good thing ! If this was true (and I suppose it is,i just couldn't check it to date), we just blow off diesel for nothing. After max. 10 minutes, the temperature produced by the engine is sufficient to heat the interior . I really would like to have the option to switch that thing off...there's really no use to have it operating permanently just because the temperature is below 10 degrees (I think that could be the activation temperature).

Hi!

On my Galaxy, which I am still driving it is the same thing - turns on and never off - but the Ford also does not get warm in less than 10!!!km of driving even with the additional heater. So you should be happy that your car is nice warm in the winter - this is less additional Fuelconsumption than the A/C in summer or not?

Uwe

[Werner807HDI]

Originally Posted by MINI_PHEDRA

Hi!

On my Galaxy, which I am still driving it is the same thing - turns on and never off - but the Ford also does not get warm in less than 10!!!km of driving even with the additional heater. So you should be happy that your car is nice warm in the winter - this is less additional Fuelconsumption than the A/C in summer or not?

Uwe

M Y car is not nice warm in wintertime, unfortunately.

[DirkS.]

Originally Posted by MINI_PHEDRA

So you should be happy that your car is nice warm in the winter - this is less additional fuel consumption than the A/C in summer or not?

That I wished but can't believe. The heater burns the Diesel directly whereas the A/C compressor just loads the engine more. My gut feeling says that the heater consumes more...but I'm not sure.

[Arnd]

Originally Posted by DirkS.

My gut feeling says that the heater consumes more...but I'm not sure.

Okay, I'm no engineer, but I will try to explain it how I understand it. As the additional heater is from Webasto, I assume that ther technical data will appley to the heater in your cars. So the heater will consume about 0,5kg Diesel per hour per hour. The heater should turn off when the engine temperatur reaches about 80/90°C. (This happens to my petrol heater, so I don't know if you can compare this to the diesel engine).

Arnd

[MINI_PHEDRA]

Originally Posted by DirkS.

That I wished but can't believe. The heater burns the Diesel directly whereas the A/C compressor just loads the engine more. My gut feeling says that the heater consumes more...but I'm not sure.

I have heard that the A/C consumes up to a liter per 100km - about 5 hp.
Have you ever tried to turn the kompressor by hand? I have tried it in a Pickup once - I think it could take a liter more - If you think that 100 kg more in the car (a normal personal car) costs you about 1 liter / 100 km.

Uwe

[Werner807HDI]

I don´t know how much my heater consumes but I noticed that it is not a little.

[snzbear]

Originally Posted by Werner807HDI

M Y car is not nice warm in wintertime, unfortunately.

We have been driving a Peugeot 807 2.2 HDI since March after a 1.9 Sharan TDI from 1999. We always froze in the Sharan, although it had the extra heater. It wasn' even comfortable at the end of the 15kms I have to drive to work when it was -3/-4 outside. The Peugeot by comparison starts warming up after only some 1-2 kms and was very comfortable to be in during the recent -4 -> -5 we have had. As such I can only suggest you get your car checked.

[Eurovanfan]

The heater has a power of around 3kW opposed to full function standheater which produces from 5kW upwards, as my Bosch/Webasto dealer told me when I was upgrading my heater to a standheater. She warned me that this could be to low, but I feel comfortable. Even at -10 degrees its warm enough to defrost the windshield. The diesel consumption is 0.5 l/h according to the manuals.
My heater seems to shut off, when the temperature of the water is high enough and start again when I consume to much warm air. (Car with 7 persons and rear vents active). So sometimes its off when I reach a parking place and sometimes its running.

Hope this helps.

[Arnd]

Originally Posted by Eurovanfan

The heater has a power of around 3kW opposed to full function standheater

When I called the Webasto Hotline, they told me that PSA/Fiat uses the 5kW heater for the EV2 diesel engines. Also the Webasto upgrade manual is titled "Thermo Top C", and AFAIK the "C" version is the 5kW one.

Arnd

[Loely]

Hello alltogether !

So, I have an additional question: In the warmer period, the bordcomputer calculates the fuel consumption exactly. But now, it's cold, the additional heater is working an the fuel consumption from the bordcomputer is about 1/2 a liter per 100km to low in comparison to the real consumption, calculated by hand.

Could it be caused by the additional heating ? Or does the bordcomputer counts also the consumption of the additional heater ?

Bye

Loely

807 Tendance 2.0 HDi

P.S. It's my first answer in English, I hope it isn't to bad ;-)

[Manu]

Originally Posted by Loely

In the warmer period, the bordcomputer calculates the fuel consumption exactly. But now, it's cold, the additional heater is working an the fuel consumption from the bordcomputer is about 1/2 a liter per 100km to low in comparison to the real consumption, calculated by hand.

Are you sure your boardcomputer was exactly right when the weather was hotter. I mean, in my case I have noticed a little difference between the consumption I calculated and what the computer on board reported. I know it's not very cold here yet but even that way, it seems to me that, -in my own case-, the board computer tends to give me a consumption that is 0.2 to 0.3 l/100kms more than what it really looks to be (not saying that my webasto would have a negative consumption )