Combined Effects of Multi-Pulse Transient Plasma Ignition and Intake Heating on Lean Limits of Well-Mixed E85 DISI Engine Operation

2014 ◽  
Vol 7 (4) ◽  
pp. 1781-1801 ◽  
Author(s):  
Magnus Sjöberg ◽  
Wei Zeng ◽  
Daniel Singleton ◽  
Jason M. Sanders ◽  
Martin A. Gundersen
Keyword(s):  
Combined Effects ◽  
Engine Operation ◽  
Plasma Ignition ◽  
Transient Plasma

Transient Plasma Ignition for Delay Reduction in Pulse Detonation Engines

2007 ◽  
Author(s):  
Charles Cathey ◽  
Fei Wang ◽  
Tao Tang ◽  
Andras Kuthi ◽  
Martin Gundersen ◽  
...  
Keyword(s):  
Delay Reduction ◽  
Pulse Detonation Engines ◽  
Pulse Detonation ◽  
Plasma Ignition ◽  
Transient Plasma

Low energy compact power modulators for transient plasma ignition

2011 ◽  
Vol 18 (4) ◽  
pp. 1084-1090 ◽  
Author(s):  
Daniel Singleton ◽  
Andras Kuthi ◽  
Jason Sanders ◽  
Martin Gundersen ◽  
Alexandra Simone ◽  
...  
Keyword(s):  
Low Energy ◽  
Plasma Ignition ◽  
Transient Plasma

Extending Lean and Exhaust Gas Recirculation-Dilute Operating Limits of a Modern Gasoline Direct-Injection Engine Using a Low-Energy Transient Plasma Ignition System

2016 ◽  
Vol 138 (11) ◽  
Author(s):  
James Sevik ◽  
Thomas Wallner ◽  
Michael Pamminger ◽  
Riccardo Scarcelli ◽  
Dan Singleton ◽  
...  
Keyword(s):  
Direct Injection ◽  
Exhaust Gas Recirculation ◽  
Low Energy ◽  
Gasoline Direct Injection ◽  
Combustion Stability ◽  
Exhaust Gas ◽  
Ignition System ◽  
Plasma Ignition ◽  
Gas Recirculation ◽  
Transient Plasma

The efficiency improvement and emissions reduction potential of lean and exhaust gas recirculation (EGR)-dilute operation of spark-ignition gasoline engines is well understood and documented. However, dilute operation is generally limited by deteriorating combustion stability with increasing inert gas levels. The combustion stability decreases due to reduced mixture flame speeds resulting in significantly increased combustion initiation periods and burn durations. A study was designed and executed to evaluate the potential to extend lean and EGR-dilute limits using a low-energy transient plasma ignition system. The low-energy transient plasma was generated by nanosecond pulses and its performance compared to a conventional transistorized coil ignition (TCI) system operated on an automotive, gasoline direct-injection (GDI) single-cylinder research engine. The experimental assessment was focused on steady-state experiments at the part load condition of 1500 rpm 5.6 bar indicated mean effective pressure (IMEP), where dilution tolerance is particularly critical to improving efficiency and emission performance. Experimental results suggest that the energy delivery process of the low-energy transient plasma ignition system significantly improves part load dilution tolerance by reducing the early flame development period. Statistical analysis of relevant combustion metrics was performed in order to further investigate the effects of the advanced ignition system on combustion stability. Results confirm that at select operating conditions EGR tolerance and lean limit could be improved by as much as 20% (from 22.7 to 27.1% EGR) and nearly 10% (from λ = 1.55 to 1.7) with the low-energy transient plasma ignition system.

The role of water in transient plasma ignition for combustion

2009 ◽  
Author(s):  
J.W. Luginsland ◽  
D. Singleton ◽  
M. Gundersen ◽  
C. Brophy ◽  
J. Sinibaldi ◽  
...  
Keyword(s):  
Plasma Ignition ◽  
Transient Plasma
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