Sparsame CR-Korken-TDIs *staun* | Posts 16+

Hello,

Quote:

"Optical switching recommendation"

"The aforementioned A3 also has this feature, but it's usually ignored in actual driving conditions because the engine speed would otherwise be ridiculously low."

Best regards, Rainer.

Mampf wrote:

What hasn't been mentioned in this discussion is that the Ibiza with the 2.0 105kW TDI engine has an "Optical Shift Recommendation" (as do many new cars). This means that the cycle no longer needs to be run through with the gears prescribed by law, but can be shifted as the vehicle recommends (or as the developer intended - e.g., using 6th gear below 100 km/h, etc.).

Very interesting... if this "feature" actually takes precedence over the shifting points mandated by the EU during the driving cycle, it could naturally give the OEM new freedoms to meet emission limits and generate attractive fuel consumption data by varying the shifting points.

Hi,

Diesel_Rudi wrote:

Current CR systems operate with the ZME (Zumesseinrichtung). This valve limits the amount of coolant being pumped into the rail. Therefore, the throttling function in the then-used RDR valve is obsolete.

Thus, throttling of compressed coolant is no longer necessary.}

ZME = Zumes unit.
Despite this, the RDR (rail pressure damper) remains connected to the rail and is still used. Both components are necessary because if the ZME (fuel injection module) fails, the pump will go into full output mode, causing the rail pressure to increase until some component fails.
However, it is true that the ZME increases the efficiency of the CR system.

Regards,
Sure, here is the translation of the text from German to English:

"Micha"