Talk:Twincharger

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Interwiki de:wp[edit]

the article in de:wp is only an disambiguation.--Ottomanisch (talk) 07:58, 28 August 2010 (UTC)[reply]

Title[edit]

It's a good article, but I'm not convinced that 'twincharging' is actually a generic name - rather it's what VAG call their version of it. There only seem to be three manufacturers who use it - and neither of the other two use twincharging as a name. However, I can't think of a better page title to use instead!Jellyfish dave (talk) 12:46, 18 April 2013 (UTC)[reply]

Notabillity[edit]

It is a good artical, but are these systems not the same as used on GM diesel (compression ignition) engines? They a variety of turbocharged and supercharger (rootes blower type) setups. Andrew Robbins (talk) 03:12, 31 October 2014 (UTC)[reply]

Toyota 4A-GZE[edit]

It mentions the 4A-GZE in the article in connection with an electromagnetic clutch that can disengage the supercharger to reduce parasitic losses...however, I think it is important to note that this is nothing to do with twincharging, rather it is intended to bypass the supercharger and allow the engine to operate as a normally aspirated unit when under low-load conditions, as described here: http://mr2.com/TEXT/SuperChargerInfo.html )..45Colt 10:48, 11 February 2015 (UTC)[reply]

Efficiency[edit]

Suggest replacing the following text: "However, the efficiencies of the turbo and supercharger are also multiplied, and since the efficiency of the supercharger is often much lower than that of large turbochargers, this can lead to extremely high manifold temperatures unless very powerful charge cooling is employed. For example, if a turbocharger with an efficiency of 70% blew into a Roots blower with an efficiency of 60%, the overall compression efficiency would be only 42% -- at 2.8 pressure ratio as shown above and 20 °C (68 °F) ambient temperature, which means that air exiting the turbocharger would be 263 °C (505 °F), which is enough to melt most rubber couplers and nearly enough to melt expensive silicone couplers. A large turbocharger producing 27 psi (1.9 bar) by itself, with an adiabatic efficiency of around 70%, would produce air at just 166 °C (331 °F)."

with this: "The work of the combined turbo and supercharger are however divided (or shared), and since the efficiency of the supercharger is often much lower than that the turbocharger, the more efficient compressor (i.e. turbocharger) should perform most of the work otherwise this can lead to overall less efficiency and extremely high manifold temperatures unless very powerful charge cooling is employed." — Preceding unsigned comment added by DPLECKO (talk • contribs) 13:54, 12 June 2015 (UTC)[reply]

Volvo Information in Need of Updating[edit]

The information regarding Volvo under "commercial availability" is currently lacking in examples compared to Volvo's current actual lineup which has more twincharged engines than the 3 entries currently listed. When editing for the sake of my own time I've kept it with those 3 entries like in previous edits while properly communicating the actual vehicles referenced, but this information should really be expanded with the long list of twincharged engines now produced as seen here Volvo Engine Architecture#2.0. Therefore either the Volvo section should be expanded significantly or some other kind of way to list the production vehicles other than power figures should be done seeing as this such a list may have been done with the expectation that there aren't many twincharged engines in production cars for the amount of variants that need to be listed to be an issue. Gyaruko (talk) 21:00, 9 May 2022 (UTC)[reply]

The purpose of the list is to provide some examples. Trying to provide a comprehensive list of all Volvo twin-charged models (past and present) will make a list that is long, boring, mostly irrelevant and hard to maintain as Volvo makes new models. Better to reword it say that these are just a few examples of the Volvo models that have twin-charging. Stepho talk 21:14, 9 May 2022 (UTC)[reply]