Mark E Magee

US Patent:

20150330326, Nov 19, 2015

Filed:

Dec 12, 2013

Appl. No.:

14/651521

Inventors:

- West Lafayette IN, US
Lyle E. Kocher - Whiteland IN, US
Carrie Hall - Chicago IL, US
Daniel Van Alstine - Lafayette IN, US
Mark Magee - Columbus IN, US

International Classification:

F02D 41/30
F02D 41/40
F02D 41/00
F02B 1/12
F02D 13/02

Abstract:

Advanced combustion modes, such as PCCI, operate near the system stability limits. In PCCI, the combustion event begins without a direct combustion trigger in contrast to traditional spark-ignited gasoline engines and direct-injected diesel engines. The lack of a direct combustion trigger encourages the usage of model-based controls to provide robust control of the combustion phasing. The nonlinear relationships between the control inputs and the combustion system response often limit the effectiveness of traditional, non-model-based controllers. Accurate knowledge of the system states and inputs is helpful for implementation of an effective nonlinear controller. A nonlinear controller is developed and implemented to control the engine combustion timing during diesel PCCI operation by targeting desired values of the in-cylinder oxygen concentration, pressure, and temperature during early fuel injection.