MAN TGX 18.480 - The difference in fuel consumption between the computer and rea

Hello,

I have a Man-a TGX 18.480, automatic. The car travels in regional transport, i.e. 90% driving around the city, loads are 24t, the curtain side semi-trailer and the employee drives the vehicle.

And now my question. After taking about 1500km +/- I always check the fuel consumption and always count all cars with a calculator when refueling to know how much car is burning in reality. In most Mans, the burning between what the computer shows and what comes out on the calculator is max up to 1 liter / 100km. However, in the above model, the fuel consumption on the calculator is 38l / 100km and on the computer it is 31l / 100km. Is there any calibration option? What can this be caused by?

I once had a similar situation in Mana, where the power supply system had to be worked. It doesn't look like it here, because this combustion does not differ much from the norm of other Mańków who do the same work. (Well, he could smoke less, but the driver still arrives and slowly assimilates the knowledge that low speed has nothing to do with economical driving )

I will immediately add that the employee has no opportunity to pick up fuel, due to work in such an environment that I would already know where and at what time and how much he took and how much he spilled .

Thank you for your reply and best regards

You write that driving in the city (90%). There are computers that below a certain speed limit and at standstill (with the engine running) do not calculate combustion. Probably here lies the reason for the increased fuel consumption.

You can't look at burning 5 euros, it burns around 26-29 l plus 5 tons of container and we are going to the land - saving! From 31l to even 40l bigger load and we are going to Romania. After the flat we count 31-34l - otherwise this is what the driver, for example, benelux. Sam Man says that around 10% is normal. You can reset the calculator with a computer.
Our company has hundreds of tgx and I saw 24l and 55l burning.
90% city and heavy - burning is normal.

kakibara wrote:

You can't look at burning 5 euros, it burns around 26-29 l plus 5 tons of container and we are going to the land - saving! From 31l to even 40l bigger load and we are going to Romania. After the flat we count 31-34l - otherwise this is what the driver, for example, benelux. Sam Man says that around 10% is normal. You can reset the calculator with a computer.
Our company has hundreds of tgx and I saw 24l and 55l burning.
90% city and heavy - burning is normal.

What you wrote are probably the producer's assumptions. So you want to tell me that if I am full, I will make a number of kilometers and fill the fuel cap again and recalculate the amount of fuel / kilometers, will I be wrong?

The fact that the manufacturer added some percentages to the ton is just as ridiculous as the assumption of oil changes in the engine every 100,000 km or after informing by computer. I would not argue with you, but I have a few trucks and I run the company for a few years, and believe me that if I operated trucks according to the manufacturer's recommendations, I would repair all engines at 700,000 km.

Anyway, we slightly deviated from the problem, because the problem is not burning, but the difference that the computer shows in the truck and the calculation after conversion.

best regards

You didn't understand my speech - but not you alone - no offense. I wrote to you what the burning looks like after loading and the route - with conversations with drivers - through my company where I work hundreds of cars have passed from tga for 1 injection to now euro 6 in which I changed the burned piston - and every driver with whom I talk speaks with the euro 6 is the most economical. I am happy and understand the driver, and you want to check the combustion - the only way that will cost you time and work is to connect the banks behind the cabin - you only have a problem because you will only calculate a little over 100km. I know because I have traveled so many times with drivers and it is not at my request - I do not care what course and where the driver is going during the test - and the driver knows it perfectly.
Returning to the topic as I wrote above, you can cancel the burning. Reset.
Two topics of burning by my company is often discussed because everyone is looking for savings - 5% or 10% - Man himself ordered to add averaged combustion - that is, you have 30 l on your hand MAN recommends adding 10% so it comes out 33l and this is real combustion according to the website - but true?
Secondly, there is no stationary heating of the air-punching engine - the car is to be operational without losing air, you start and on the road.

Ps to the manufacturer's recommendations - according to the manufacturer's recommendations - we change oils every 90 - to 110 thousand km. - 110,000 km is the planner and driver and tgx euro 5 reach 700,000 km without any problem, the euro has over 400,000 km with us on 6 May. With a very large number of pieces we have several engine replacements at the beginning we reached 15 - 20 thousand km and the first with a hole in the crowd - we do the renovation ourselves after the warranty. And if I can add it here, the file is more polished and causes really little trouble.