Was macht dieses Ventil am BMR | Posts 16+

Hello,

It's due to the engine power.
Of course, you need more air for 170 horsepower than you do for 140 horsepower.
In Martin's case, this means more boost pressure.

Looking at the air masses that are drawn in at maximum pressure (P_max), one quickly finds oneself dealing with the same air masses as those found in high-revving naturally aspirated engines.

Therefore, we are now facing the same problems with electric motors as we did with gasoline engines.

Therefore, the solutions that work for naturally aspirated engines now also apply to turbocharged engines.
So, it's an intake manifold with a variable geometry design.
The result is reflected in the motor's torque curve, which, according to Volkswagen, remains constant at 350 Nm between 1750 and 2500 rpm.

Best regards, Jochen.

Hello again.

The 'swirl intake port' in this engine has only one purpose: to improve the swirl of the intake air at partial load, so that the fuel mixes better with the air. Therefore, an intake channel from each cylinder is closed off in the partial load circuit.
I'll try to upload a picture sometime to make it clearer. This 'shift intake manifold' has nothing to do with torque or any of that stuff; it just helps achieve better exhaust values in the partial load range.

Best regards,

However, this is related to the engine's performance. If the swirl were high enough at partial load without flaps, the airflow would be too restricted at full load. Since an engine producing 170 horsepower requires more air than one producing 140, it becomes a problem finding a good compromise without flaps.

I would personally never use the term "switchable intake manifold" when referring to a diesel engine, as it makes me think of the well-known, switchable resonance intake manifold used in gasoline engines, which regulates or adjusts the effective intake length of the intake pipe.
That has absolutely nothing to do with the diesel intake manifold here (which also provides some kind of "switching").

In diesel engines, a typical design feature is the shutdown or throttling of the filling channel in a 4-valve cylinder head. This creates a higher swirl in the combustion chamber due to the increased flow through the tangential channel.

The mechanism of the "Drall" level has already been correctly described in the previous posts.

It's interesting that the VW solution apparently only has two switch positions: "ON" and "OFF." Based on the simple control using a vacuum actuator and electronic pressure regulator (similar to a shut-off valve), I would speculate that...
Dieselmartin, can you confirm this? Or does the valve also adjust to intermediate positions during engine operation?

Best regards,

I haven't had a chance to examine the damage more closely yet – I only see my car when it's dark during the week.

I also suspect it's only "on or off" because the vacuum sensor is the same one used for the shut-off valve on VP37 TDIs. Furthermore, the solenoid valve for it is "Made in USA," and that probably means it can only be either "fully engaged" or "not working at all."

My laptop is only holding a charge for 20 minutes now, and the CAN interface hasn't arrived yet. Maybe I'll take a look at it this weekend, but in a very basic way – using a multimeter and LEDs.

Greetings.
Okay, please provide the German text you would like me to translate into English. I will only provide the translation.

The valves only open and close, and that's only within a certain load range; at full load, they are fully open, nothing more.

This is the same behavior as seen in the twin-port engines used by Opel.
These are gasoline engines that increase torque in the lower RPM range due to the deactivated second intake port.
At high engine speeds, the second channel is opened to allow maximum air mass into the combustion chambers.

If the valves weren't positioned in the intake port, the swirl of the incoming air mass would be lower, and it wouldn't be possible to burn as much fuel cleanly. This results in a decrease in torque.

Best regards, Jochen.

[edit]
Oh, that was the wrong button. Could a moderator please delete the article above and leave this one? Thank you.

Here it is:
http://www.tuneline.at/news/detail.asp?start=99

Hi Christian,

Bertil already posted that in the very first response.
But it doesn't matter .

@everyone

The weather seems to be improving a bit over the weekend, so I might try logging some data (if the valve is stuck somewhere in the main water body), or I could just attach an LED to it.


Greetings.
Okay, please provide the German text you would like me to translate into English. I will only provide the translation.

I completely missed that.