scholarly journals Closed-Loop Combustion Control Using Ion-current Signals in a 6-Cylinder Port-Injected Natural-gas Engine

2008 ◽  
Author(s):  
Mehrzad Kaiadi ◽  
Per Tunestal ◽  
Bengt Johansson
Keyword(s):  
Natural Gas ◽  
Closed Loop ◽  
Ion Current ◽  
Combustion Control ◽  
Gas Engine ◽  
Natural Gas Engine ◽  
Cylinder Port

Transient Control of Combustion Phasing and Lambda in a Six-Cylinder Port-Injected Natural-Gas Engine

2010 ◽  
Vol 132 (9) ◽  
Author(s):  
Mehrzad Kaiadi ◽  
Magnus Lewander ◽  
Patrick Borgqvist ◽  
Per Tunestal ◽  
Bengt Johansson
Keyword(s):  
Natural Gas ◽  
Control Strategies ◽  
Maximum Load ◽  
Spark Ignition Engines ◽  
Heavy Duty ◽  
Gas Engine ◽  
Natural Gas Engine ◽  
Engine Model ◽  
Transient Control ◽  
Cylinder Port

Fuel economy and emissions are the two central parameters in heavy duty engines. High exhaust gas recirculation rates combined with turbocharging has been identified as a promising way to increase the maximum load and efficiency of heavy duty spark ignition engines. With stoichiometric conditions, a three way catalyst can be used, which keeps the regulated emissions at very low levels. The Lambda window, which results in very low emissions, is very narrow. This issue is more complex with transient operation, resulting in losing brake efficiency and also catalyst converting efficiency. This paper presents different control strategies to maximize the reliability for maintaining efficiency and emissions levels under transient conditions. Different controllers are developed and tested successfully on a heavy duty six-cylinder port injected natural gas engine. Model predictive control was used to control lambda, which was modeled using system identification. Furthermore, a proportional integral regulator combined with a feedforward map for obtaining maximum brake torque timing was applied. The results show that excellent steady-state and transient performance can be achieved.

Effect of Fuel Composition and Altitude on Regulated Emissions from a Lean-Burn, Closed Loop Controlled Natural Gas Engine

1997 ◽  
Author(s):  
Michael S. Graboski ◽  
Robert L. McCormick ◽  
Anthony W. Newlin ◽  
D. L. Dunnuck ◽  
M. M. Kamel ◽  
...  
Keyword(s):  
Natural Gas ◽  
Closed Loop ◽  
Fuel Composition ◽  
Lean Burn ◽  
Gas Engine ◽  
Natural Gas Engine

scholarly journals Transient Control of Combustion Phasing, Lambda in a 6-Cylinder Port-Injected Natural-Gas Engine

2009 ◽  
Author(s):  
Mehrzad Kaiadi ◽  
Magnus Lewander ◽  
Patrick Borgqvist ◽  
Per Tunestal ◽  
Bengt Johansson
Keyword(s):  
Natural Gas ◽  
Control Strategies ◽  
Maximum Load ◽  
Spark Ignition Engines ◽  
Heavy Duty ◽  
Gas Engine ◽  
Natural Gas Engine ◽  
Engine Model ◽  
Transient Control ◽  
Cylinder Port

Fuel economy and emissions are the two central parameters in heavy duty engines. High EGR rates combined with turbocharging has been identified as a promising way to increase the maximum load and efficiency of heavy duty spark ignition engines. With stoichiometric conditions a three way catalyst can be used which keeps the regulated emissions at very low levels. The Lambda window which results in very low emissions is very narrow. This issue is more complex with transient operation resulting in losing brake efficiency and also catalyst converting efficiency. This paper presents different control strategies to maximize the reliability for maintaining efficiency and emissions levels under transient conditions. Different controllers are developed and tested successfully on a heavy duty 6-cylinder port injected natural gas engine. Model Predictive Control (MPC) was used to control lambda which was modeled using System Identification. Furthermore, a Proportional Integral (PI) regulator combined with a feedforward map for obtaining Maximum Brake Torque (MBT) timing was applied. The results show that excellent steady-state and transient performance can be achieved.

Measured and Predicted Performance of a Downsized, Medium Duty, Natural Gas Engine

2017 ◽  
Author(s):  
Robert Draper ◽  
Brendan Lenski ◽  
Franz-Joseph Foltz ◽  
Roderick Beazley ◽  
William Tenny
Keyword(s):  
Natural Gas ◽  
Gas Engine ◽  
Natural Gas Engine
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