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Investigations on the Effects of the Ignition Spark with Controlled Autoignition (CAI)
- Fatih Sarikoc - Institute for Reciprocating Engines, Universität Karlsruhe (TH) ,
- Sebastian Hensel - Institute for Reciprocating Engines, Universität Karlsruhe (TH) ,
- Kyung-Man Han - Institute for Reciprocating Engines, Universität Karlsruhe (TH) ,
- Heiko Kubach - Institute for Reciprocating Engines, Universität Karlsruhe (TH) ,
- Ulrich Spicher - Institute for Reciprocating Engines, Universität Karlsruhe (TH)
Journal Article
2009-01-1770
ISSN: 1946-3936, e-ISSN: 1946-3944
Sector:
Topic:
Citation:
Sarikoc, F., Hensel, S., Han, K., Kubach, H. et al., "Investigations on the Effects of the Ignition Spark with Controlled Autoignition (CAI)," SAE Int. J. Engines 2(1):1547-1558, 2009, https://doi.org/10.4271/2009-01-1770.
Language:
English
Abstract:
Controlled Autoignition (CAI) is a very promising technology for simultaneous reduction of fuel consumption and engine-out emissions [3, 4, 9, 16]. But the operating range of this combustion mode is limited on the one hand by high pressure gradients with the subsequent occurrence of knocking, increasing NOX-emissions and cyclic variations, and on the other hand by limited operating stability due to low mixture temperatures. At higher loads the required amount of internal EGR decrease to reach self-ignition conditions decrease and hence the influence of the ignition spark gain. The timing of the ignition spark highly influence the combustion process at higher loads. With the ignition spark, pre-reactions are initialized with a defined heat release. Thus the location of inflammation and flame propagation can be strongly influenced and cyclic variations at higher loads can be reduced.