Torque

A friendly hello to everyone.
I've been observing this forum for some time now and I'm impressed by your technical expertise.
Okay, here's the translation:

"Now, my question: I heard from a friend that in newer TDI engines with PD injection, the torque..."
would be detectable through diagnosis.
Does anyone have any idea if that's true?
I'd like to know what mine is.
I drive a Golf TDI with a 96kW MTB ASZ engine, supposedly producing 310Nm of torque.

Thank you, Jürgen.

Hello,

Yes, in some engine control units (ECUs), it's possible to read out a "calculated" torque value. I don't know if that's the case with the current PDs.

What do you intend to do with these values? They are simply calculated values that the control unit derives from the current operating data. A measurement sensor is not available.

In short, it's kind of like when you're on a bicycle and you say, "I'm pedaling so hard I'm sweating, so I'm going uphill at 30 km/h."
Just: Is your bike chain lubricated? Are your tires inflated? Are you facing a headwind? What did you have for breakfast?

The same applies to the calculated values from the engine control unit. They are estimates of the injection quantity and boost pressure required to achieve a specific torque output.
The engine control unit doesn't know the wear and tear condition of your engine, nor does it know about any defects. It doesn't know what type of oil is being used, whether you have deposits on the valves, what the spray pattern of the injectors is, whether the piston rings are okay, and it doesn't even know if you have orange juice or diesel in the tank.

Best regards, Rainer.

Well, it's not quite as estimated as that.

The internal moment, which is calculated based on air mass and fuel injection volume in the current engine operating conditions, is determined quite accurately. However, the amount of that moment that actually reaches the clutch is a different matter.

Roughly speaking, you can take the value at idle and subtract it from the full-load value. This should give you a reasonable approximation of the rated torque.
One should investigate significant differences.

Since the EDC15P and EDC16 systems operate based on torque, this calculation of the internal engine torque is a crucial parameter.

CU Gremlin.

Rainer K. wrote: "But what are you going to do with these values? They are just calculated values that the control unit derives from the current operating data." A sensor is not available.

It just interested me.
The main reason is that I would like to have my Audi A3 Sportback (ASZ) chip-tuned.
During subsequent inspections at the VW workshop, this "calculated torque value" should be...
Don't raise any suspicions with the workshop supervisor.

What experiences do you have with chip tuning?
Are there any problems, for example, with the transmission?
What about the diesel consumption?
The 6-speed gearbox is designed for a maximum torque of 350 Nm, but most tuners exceed this value significantly.
I have no concerns about the engine, because the 1.9 TDI engines with a base power of 110 hp (MKB AHF) used in the 24-hour race at the Nürburgring... "ASV cars with over 200 horsepower easily made it to the finish line!! Maximum boost pressure was 2.5 bar, no joke."

Best regards,
Jürgen

Hello Jürgen,

A tampered-with engine will also reveal itself through discrepancies in the target values for fuel injection amounts, turbocharger pressure, etc.
As soon as a measurement run is performed, not only the popometer detects chip tuning.

Achieving 200 horsepower from a base engine that only produces 110 horsepower requires extensive hardware modifications.

@Gremlin: You're right. The engine has to be in good condition, and there has to be the right fuel in the tank. I wanted to express that a calculated value doesn't necessarily have anything to do with reality. It only takes the diesel filter to be faulty, and then those good values are gone.

Best regards, Rainer.

Rainer K. wrote: Achieving 200 horsepower from a base of 110 horsepower requires extensive hardware modifications.

I already understand that.
I just meant that the base is the 110hp TDI engine block with the original crankshaft.
It's logical that many other parts don't match the original specifications, such as the turbocharger and intercooler, etc.

Jürgen.

In my electric power drive (ATD), the torque characteristic curve is displayed in measurement block 20, field 2.
If I interpret the 35 Nm measured in the standard state, with the engine warm and without any additional loads (e.g., air conditioning, heated seats, rear window defroster turned off), as internal friction and auxiliary components, then it aligns relatively well with a value of 285 Nm minus 35 Nm, resulting in approximately 250 Nm.
I'm starting to doubt the inflated value (385 Nm - 35 Nm = 350 Nm) because the data no longer seems to come from a dynamometer test. A test bench or a performance simulation can be quite sobering.
Actively logging.
OlBe.