Patents by Inventor Junmin Wang

Junmin Wang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 7512479
    Abstract: The present disclosure relates to a method and/or engine controller and/or article comprising a storage medium having stored thereon instructions that when executed by a machine estimate air fractions in internal combustion engines with dual-loop EGR (exhaust gas recirculation) systems for supporting multiple alternative combustion modes.
    Type: Grant
    Filed: November 19, 2007
    Date of Patent: March 31, 2009
    Assignee: Southwest Research Institute
    Inventor: Junmin Wang
  • Publication number: 20080243361
    Abstract: A method of controlling a diesel engine that is capable of multiple combustion modes and equipped with a turbocharger and EGR loop. The control method avoids a singularity condition inherent in turbocharged diesel engine having multiple combustion modes. For different combustion modes, different system states, control variables, and actuators are carefully chosen for different controllers based on the characteristics of the corresponding combustion mode as well as sensor and measurement limitations.
    Type: Application
    Filed: April 3, 2008
    Publication date: October 2, 2008
    Inventor: Junmin Wang
  • Patent number: 7389173
    Abstract: A method of controlling a diesel engine that is capable of multiple combustion modes and equipped with a turbocharger and EGR loop. The control method avoids a singularity condition inherent in turbocharged diesel engine having multiple combustion modes. For different combustion modes, different system states, control variables, and actuators are carefully chosen for different controllers based on the characteristics of the corresponding combustion mode as well as sensor and measurement limitations.
    Type: Grant
    Filed: March 27, 2007
    Date of Patent: June 17, 2008
    Assignee: Southwest Research Institute
    Inventor: Junmin Wang
  • Publication number: 20080040085
    Abstract: A method of modeling a diesel engine that is capable of multiple combustion modes and equipped with a turbocharger and EGR loop. The model comprises a set of equations, each equation representing one of the following as a time derivative: pressure at the intake manifold, pressure between the turbine and an intake manifold throttle, pressure at the exhaust manifold, the compressor power, and the fresh air fraction (the ratio of fresh air to EGR). The model is used to determine what engine conditions (such as throttle positions and turbocharger output) will result in desired pressures and fresh air fraction.
    Type: Application
    Filed: August 10, 2007
    Publication date: February 14, 2008
    Inventor: Junmin Wang
  • Patent number: 7266439
    Abstract: A fuel property adaptive control system for controlling the performance of an engine, such as an internal combustion engine. An on-board fuel classifier classifies the fuel that the engine is running. Based on stored properties for that fuel, the system selects optimal engine control parameters.
    Type: Grant
    Filed: October 5, 2005
    Date of Patent: September 4, 2007
    Assignee: Southwest Research Institute
    Inventors: Junmin Wang, Gary D. Neely, Shizuo Sasaki, Thomas W. Ryan, III
  • Patent number: 7206688
    Abstract: A system and method for modeling and controlling an internal combustion engine having multiple combustion modes. The in-cylinder condition is controlled by gas handling devices through both a feed forward and feedback path. The latter path includes an “in-cylinder condition estimator” and a non-linear controller. Fueling parameters are controlled by engine speed, desired torque, and input from the in-cylinder condition estimator.
    Type: Grant
    Filed: November 1, 2005
    Date of Patent: April 17, 2007
    Assignee: Southwest Research Institute
    Inventors: Junmin Wang, Jayant V. Sarlashkar
  • Patent number: 7163007
    Abstract: A control system for an internal combustion engine, which is capable of optimally controlling fuel injection by an injector even in a transient state of the engine. An ECU 2 of the engine provided with an EGR system (14) controls the amount (Fa) of air drawn into cylinders (3a) via an intake system (4). An air flow sensor (27) detects the intake air amount (Fa). The ECU 2 estimates a flow rate (Fe_hat) of EGR gases according to response delay of recirculation of the EGR gases by the EGR system (14), estimates the amount (mo2) of oxygen existing in the cylinder (3a), based on the detected intake air amount (Fa) and the estimated flow rate (Fe_hat) of the EGR gases, determines a fuel injection parameter (Q*) based on the engine speed (Ne) and the estimated in-cylinder oxygen amount (mo2), and controls an injector (6) based on the determined fuel injection parameter (Q*).
    Type: Grant
    Filed: July 12, 2005
    Date of Patent: January 16, 2007
    Assignee: Honda Motor Co., Ltd.
    Inventors: Shizuo Sasaki, Junmin Wang, Gary D Neely
  • Patent number: 7142975
    Abstract: A virtual cylinder pressure sensor for use with an internal combustion engine. The sensor has one or more independent modules, each used to estimate a different cylinder pressure variable. Each module is trained using measurement data from a physical cylinder pressure sensor and a real engine. After the modules are trained, they can be embedded into the engine control unit of the same engine type, and used to estimate and predict the values for which they were trained.
    Type: Grant
    Filed: April 20, 2005
    Date of Patent: November 28, 2006
    Assignee: Southwest Research Institute
    Inventors: Junmin Wang, Ryan C. Roecker, Charles E. Roberts, Jr.
  • Patent number: 7076361
    Abstract: A method and system for providing data representing crankshaft position. For each rising edge of the crankshaft signal, a position value and a factor value are stored in a look-up table. Cam and crankshaft signals are used to locate an initial crankshaft position. This initial position value is used as a pointer to the look-up table, and incremented with each rising pulse of the crankshaft signal. Data from the table is used to extrapolate crankshaft position from crankshaft signal values to a desired resolution in degree angle units.
    Type: Grant
    Filed: March 29, 2005
    Date of Patent: July 11, 2006
    Assignee: Southwest Research Institute
    Inventors: Junmin Wang, Jayant V. Sarlashkar
  • Publication number: 20060122763
    Abstract: A system and method for modeling and controlling an internal combustion engine having multiple combustion modes. The in-cylinder condition is controlled by gas handling devices through both a feed forward and feedback path. The latter path includes an “in-cylinder condition estimator” and a non-linear controller. Fueling parameters are controlled by engine speed, desired torque, and input from the in-cylinder condition estimator.
    Type: Application
    Filed: November 1, 2005
    Publication date: June 8, 2006
    Inventors: Junmin Wang, Jayant Sarlashkar
  • Publication number: 20060080025
    Abstract: A fuel property adaptive control system for controlling the performance of an engine, such as an internal combustion engine. An on-board fuel classifier classifies the fuel that the engine is running. Based on stored properties for that fuel, the system selects optimal engine control parameters.
    Type: Application
    Filed: October 5, 2005
    Publication date: April 13, 2006
    Inventors: Junmin Wang, Gary Neely, Shizuo Sasaki, Thomas Ryan
  • Publication number: 20060011180
    Abstract: A control system for an internal combustion engine, which is capable of optimally controlling fuel injection by an injector even in a transient state of the engine. An ECU 2 of the engine provided with an EGR system (14) controls the amount (Fa) of air drawn into cylinders (3a) via an intake system (4). An air flow sensor (27) detects the intake air amount (Fa). The ECU 2 estimates a flow rate (Fe_hat) of EGR gases according to response delay of recirculation of the EGR gases by the EGR system (14), estimates the amount (mo2) of oxygen existing in the cylinder (3a), based on the detected intake air amount (Fa) and the estimated flow rate (Fe_hat) of the EGR gases, determines a fuel injection parameter (Q*) based on the engine speed (Ne) and the estimated in-cylinder oxygen amount (mo2), and controls an injector (6) based on the determined fuel injection parameter (Q*).
    Type: Application
    Filed: July 12, 2005
    Publication date: January 19, 2006
    Inventors: Shizuo Sasaki, Junmin Wang, Gary Neely
  • Publication number: 20050251322
    Abstract: A virtual cylinder pressure sensor for use with an internal combustion engine. The sensor has one or more independent modules, each used to estimate a different cylinder pressure variable. Each module is trained using measurement data from a physical cylinder pressure sensor and a real engine. After the modules are trained, they can be embedded into the engine control unit of the same engine type, and used to estimate and predict the values for which they were trained.
    Type: Application
    Filed: April 20, 2005
    Publication date: November 10, 2005
    Applicant: Southwest Research Institute
    Inventors: Junmin Wang, Ryan Roecker, Charles Roberts
  • Publication number: 20050223787
    Abstract: A method and system for providing data representing crankshaft position. For each rising edge of the crankshaft signal, a position value and a factor value are stored in a look-up table. Cam and crankshaft signals are used to locate an initial crankshaft position. This initial position value is used as a pointer to the look-up table, and incremented with each rising pulse of the crankshaft signal. Data from the table is used to extrapolate crankshaft position from crankshaft signal values to a desired resolution in degree angle units.
    Type: Application
    Filed: March 29, 2005
    Publication date: October 13, 2005
    Applicant: Southwest Research Institute
    Inventors: Junmin Wang, Jayant Sarlashkar