By Michael Günther, Marc Sens
The quantity comprises chosen and reviewed papers from the third convention on Ignition platforms for gas Engines in Berlin in November 2016.
specialists from and universities speak about of their papers the demanding situations to ignition platforms in supplying trustworthy, exact ignition within the gentle of a large unfold in
combination caliber, excessive exhaust gasoline recirculation charges and excessive cylinder pressures. vintage spark plug ignition in addition to substitute ignition structures are assessed, the
ignition process being one of many key applied sciences to additional optimizing the fuel engine.
Read or Download Ignition Systems for Gasoline Engines: 3rd International Conference, November 3-4, 2016, Berlin, Germany PDF
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Extra resources for Ignition Systems for Gasoline Engines: 3rd International Conference, November 3-4, 2016, Berlin, Germany
Example text
2 bari in Fig. 19. Here a comparison between 46 M. Brandt et al. Fig. 18. External EGR variation on single cylinder engine C at 2000 rpm/3 bari; combustion stability, fuel consumption and NOx raw emissions a conventional transformer coil operated at two energy levels, CEI and a DCO system is shown. DCO system has been introduced in Sect. 3. It offers a quite high energy of 450 mJ but also shows very high spark current pulses which need to be considered when evaluating spark plug wear. An external EGR variation was performed to study the influence of the ignition systems on combustion stability limit.
17 compared to conventional TCI-Systems ranging between 70 … 90 mJ and MSI. • A continuous energy fed into the spark is essential for reaching highest air dilution values. • Even if benefits in terms of fuel economy at some operation points are small, the main focus is put on significant reduction of the NOx raw emissions. Those significantly determine, if a simpler/cheaper NOx aftertreatment can be chosen. 5 Summary CEI (Controlled Electronic Ignition) as a new approach for high performance ignition is presented; being derived from generic analysis of requirements driven by from market and combustion trends but also considering aspects of industrialization for automotive high volume products.
Here the main focus was on evaluating the benefit in terms of higher dilution rates for EGR and for homogenous lean combustion concepts. Variations of internal and external EGR rates show in general an increased combustion robustness enabling higher EGR rates. Depending on engine and reference ignition, EGR rates could be extended with CEI by ΔEGR 5…12 %. This in general enables fuel economy benefits of around 1 % but at some specific points up to 3 %. Compared to MSI a benefit was observed which supports the conclusions made in Sect.