1
Zhiping Steven Liu, Anupam Gangopadhyay: Dual-loop control systems and methods for a sequential turbocharger. June 25, 2013: US08468821 (32 worldwide citation)

A system for a sequential turbocharger includes a loop control module, a set-point module, and a loop operation module. The loop control module generates a loop control mode signal based on an engine speed signal and an engine load signal. The loop control mode signal indicates one of a single-loop ...


2
Anupam Gangopadhyay: Intake oxygen estimator for internal combustion engine. GM Global Technology Operations, Kathryn A Marra, October 3, 2006: US07117078 (31 worldwide citation)

An internal combustion engine system includes an intake manifold, a combustion chamber, an exhaust manifold and exhaust gas recirculation apparatus for recirculating a portion of the exhausted gases from the exhaust manifold to the intake manifold. An estimate intake manifold oxygen concentration is ...


3
Moataz Ali, Anupam Gangopadhyay: Real-time nitrogen oxides (NOx) estimation process. General Motors Corporation, Kathryn A Marra, August 10, 2004: US06775623 (22 worldwide citation)

A process for providing a real-time estimation of in-cylinder NOx production rates during a combustion process in an internal combustion engine. The process employs a model that takes into account fundamental in-cylinder variables such as temperature, pressure and oxygen content. The process can be ...


4
Kevin Andrew Gady, Anupam Gangopadhyay: Nitrogen oxide estimation downstream of a selective catalytic reduction catalyst. November 22, 2011: US08061126 (18 worldwide citation)

A dosing control system comprises a selective catalytic reduction (SCR) analysis module, a dosing management module, an adjustment module, and an error module. The SCR analysis module estimates ammonia (NH3) stored by an SCR catalyst, a maximum NH3 storage capacity of the SCR catalyst, and a nitroge ...


5
Ibrahim Haskara, Anupam Gangopadhyay, Paul Anthony Battiston, Frederic Anton Matekunas, Patrick G Szymkowicz: Simultaneous EGR correction and individual cylinder combustion phase balancing. GM Global Technology Operations, Kathryn A Marra, June 19, 2007: US07231906 (14 worldwide citation)

An internal combustion engine is configured with combustion chamber pressure sensing and exhaust gas recirculation apparatus. Fuel injection timing is adjusted based on combustion phasing and exhaust gas recirculation is controlled based on average fuel injection timing adjustments.


6
Kevin Andrew Gady, Anupam Gangopadhyay: Dosing agent injection control for selective catalytic reduction catalysts. GM Global Technology Operations, June 15, 2010: US07736595 (11 worldwide citation)

A dosing control system comprises a selective catalytic reduction (SCR) analysis module and a dosing management module. The SCR analysis module estimates ammonia (NH3) stored by an SCR catalyst, maximum NH3 storage capacity of the SCR catalyst, NH3 slip downstream of the SCR catalyst, NH3 oxidation, ...


7
Anupam Gangopadhyay: Engine cylinder-to-cylinder variation control. GM Global Technology Operations, Kathryn A Marra, February 20, 2007: US07178507 (10 worldwide citation)

A control system and method for balancing output and exhaust emission values of the various cylinders of an engine having individual cylinder fuel delivery control. Selected output and emission related values for one cylinder, selected as a base cylinder, are compared to the same values for the othe ...


8
Yue Yun Wang, Anupam Gangopadhyay: Method and apparatus for estimating exhaust pressure of an internal combustion engine. GM Global Technology Operations, October 21, 2008: US07438061 (9 worldwide citation)

A method and apparatus are provided, comprising an internal combustion engine equipped with a variable geometry intake air compressing device and a control module operative to estimate exhaust gas pressure during ongoing engine operation. The control module is adapted to monitor sensing devices of t ...


9
G George Zhu, Anupam Gangopadhyay: Adaptive noise suppression system and method. Cummins, Barnes & Thornburg, April 27, 2004: US06728380 (9 worldwide citation)

A system and method for suppressing cyclic noise components of a sampled sensor signal generates an error compensation signal that is subtracted from the sampled sensor signal to produce a corrected signal. A moving average of the sampled sensor signal, or sensor error signal, is obtained that corre ...


10
Frederic Anton Matekunas, Paul Anthony Battiston, Patrick G Szymkowicz, Anupam Gangopadhyay: Method for controlling fuel injection in a compression ignition engine. GM Global Technology Operations, September 29, 2009: US07594493 (7 worldwide citation)

A method for controlling operation of an internal combustion engine operating lean of stoichiometry is described. The engine is a multi-cylinder direct-injection engine operative in repetitive cycles each cycle including intake, compression, expansion, and exhaust strokes. The method includes adapti ...