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
Gregory P Matthews, Zhiping Steven Liu: Intake port pressure prediction for cylinder activation and deactivation control systems. GM Global Technology Operations, December 29, 2015: US09222427 (16 worldwide citation)

A system includes a parameter module that determines at least one of a position of a throttle and a load of an engine. A cylinder status module generates a status signal indicating an activation status of each cylinder of the engine. The cylinder status module determines whether one or more of the c ...


3
B Jerry Song, Ping Ge, Zhiping Steven Liu, Anupam Gangopadhyay: System and method for controlling a two-stage series sequential turbocharger using bypass valve leakage control. October 2, 2012: US08276378 (5 worldwide citation)

A method of controlling a turbocharger for an engine and a control system for the same includes a variable nozzle turbine control module operating a variable nozzle turbine of a high pressure turbocharger closed loop in a first load-engine speed region. The system also includes a high pressure turbi ...


4
Zhiping Steven Liu, B Jerry Song, Anupam Gangopadhyay, Ping Ge: Mode transition systems and methods for a sequential turbocharger. November 6, 2012: US08302397 (2 worldwide citation)

A system for a sequential turbocharger includes a mode selection module, a feed-forward selection module, and a control loop module. The mode selection module generates a control mode signal based on an engine speed signal, an engine torque signal, and an engine mode signal. The control mode signal ...


5
Zhiping Steven Liu, Eugene V Gonze: Exhaust treatment methods and systems. GM Global Technology Operations, Cantor Colburn, September 17, 2013: US08538661 (1 worldwide citation)

A method of evaluating a particulate filter of an exhaust treatment system is provided. The method includes: selectively enabling at least one of data collection and resistance evaluation based on a particulate matter level in the particulate filter; when data collection is enabled, computing a part ...


6
Gregory P Matthews, Zhiping Steven Liu, Daniel G Brennan: Air per cylinder determination systems and methods. GM Global Technology Operations, January 3, 2017: US09534550

A cylinder control system of a vehicle includes a cylinder control module and an air per cylinder (APC) prediction module. The cylinder control module determines a desired cylinder activation/deactivation sequence. The cylinder control module also activates and deactivates valves of cylinders of an ...


7
Zhiping Steven Liu, Gregory P Matthews, Anthony B Will: System and method for predicting parameters associated with airflow through an engine. GM Global Technology Operations, November 15, 2016: US09494092

A system according to the principles of the present disclosure includes an engine air sensor, an engine air prediction module, and an engine actuator module. The engine air sensor measures an engine air parameter at a first rate. The engine air parameter includes at least one of a mass flow rate of ...


8
Zhiping Steven Liu, Eugene V Gonze, Janean E Kowalkowski: Regeneration diagnostic methods and systems. GM Global Technology Operations, Cantor Colburn, December 8, 2015: US09206727

A method of monitoring an exhaust treatment system of a vehicle is provided. The method includes: determining a modeled resistance of exhaust flow in the exhaust treatment system; determining a measured resistance of exhaust flow in the exhaust treatment system; evaluating the modeled resistance and ...


9
Zhiping Steven Liu, Daniele Ceccarini, Anupam Gangopadhyay, Andrea Baccile, Peter Fussey: Combustion temperature estimation system and method for an engine management system. January 29, 2013: US08364420

A flame temperature estimator includes an adiabatic flame temperature module that estimates an adiabatic flame temperature. A temperature reduction module estimates a temperature reduction for the adiabatic flame temperature based on an air-to-fuel ratio of an engine. A combustion temperature trend ...


10
Zhiping Steven Liu, Anupam Gangopadhyay: Dual-loop control systems and methods for a sequential turbocharger. Gm Global Technology Operations, May 19, 2011: US20110113773-A1

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 ...