Patents by Inventor Dennis Seung-Man

Dennis Seung-Man 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).

  • METHODS AND SYSTEMS FOR PURGING VEHICLE FUEL VAPORS
    Publication number: 20150240756
    Abstract: Systems and methods for improving fuel vapor purging for a vehicle are presented. In one example, a fuel vapor storage canister vent valve is housed in a fuel vapor storage canister for the purposes of heating contents of the fuel vapor storage canister and venting the fuel vapor storage canister to atmosphere.
    Type: Application
    Filed: February 27, 2014
    Publication date: August 27, 2015
    Applicant: Ford Global Technologies, LLC
    Inventors: Aed M. Dudar, Russell Randall Pearce, Dennis Seung-Man Yang
  • Internal orifice characterization in leak check module
    Patent number: 9109548
    Abstract: Systems and methods for internal orifice characterization in an evaporative leak check module are disclosed. In one example approach, a method comprises operating a pump to draw air from an emission control system through an orifice to obtain a reference pressure, and indicating a leak in response to pressure in the emission control system remaining above a threshold pressure while operating the pump to decrease pressure in the emission control system, where the threshold pressure is based on a coded indication and the reference pressure.
    Type: Grant
    Filed: May 9, 2013
    Date of Patent: August 18, 2015
    Assignee: Ford Global Technologies, LLC
    Inventors: Aed M. Dudar, Douglas Raymond Martin, Mark W. Peters, Robert Roy Jentz, Dennis Seung-Man Yang
  • FUEL TANK DEPRESSURIZATION BEFORE REFUELING A PLUG-IN HYBRID VEHICLE
    Publication number: 20150226138
    Abstract: A method for operating a vehicle system is provided. The method includes monitoring a change in a temperature of the fuel vapor canister coupled to a fuel tank via a canister temperature sensor and adjusting operation of a fuel tank isolation valve based on the change in temperature of the fuel vapor canister.
    Type: Application
    Filed: April 21, 2015
    Publication date: August 13, 2015
    Inventors: Dennis Seung-Man Yang, Aed M. Dudar, Russell Randall Pearce
  • SYSTEM AND METHODS FOR ULLAGE SPACE FUEL LEVEL ESTIMATION
    Publication number: 20150211914
    Abstract: A method for a vehicle, comprising: indicating a true fill level of a fuel tank based on a fuel vapor canister temperature profile during a refueling event. In this way, a quantity fuel dispensed over the maximum fill level of the fuel tank may be accounted for, regardless of the fuel level sensor reading.
    Type: Application
    Filed: January 30, 2014
    Publication date: July 30, 2015
    Applicant: Ford Global Technologies, LLC
    Inventors: Aed M. Dudar, Damien Baldwin, Dennis Seung-Man Yang, Robert Roy Jentz
  • CLEANING CYCLE FOR CAPLESS REFUELING NECK
    Publication number: 20150211952
    Abstract: A method for a vehicle, comprising: following a refueling event, venting a capless refueling assembly to a fuel tank; and then executing an evaporative emissions leak test. In this way, residual fuel trapped in the capless refueling assembly may be removed. This, in turn will prevent a pressure build-up in the capless refueling assembly which could lead to the downstream door opening during a leak test, thereby confounding results.
    Type: Application
    Filed: January 30, 2014
    Publication date: July 30, 2015
    Applicant: Ford Global Technologies, LLC
    Inventors: Dennis Seung-Man Yang, Aed M. Dudar, Rob Ognjanovski, JR.
  • Leak detection based on fuel level
    Patent number: 9091227
    Abstract: Methods and systems for fuel system leak detection are disclosed. In one example approach, a method comprises, during an engine-on condition, delivering fuel from a fuel tank to one or more cylinders of the engine while the fuel tank is sealed off from atmosphere, and indicating a leak based on pressure in the fuel tank. For example, a leak may be indicated in response to a pressure decrease in the fuel tank greater than an expected pressure decrease, where the expected pressure decrease is based on a fuel level in the fuel tank.
    Type: Grant
    Filed: July 18, 2013
    Date of Patent: July 28, 2015
    Assignee: Ford Global Technologies, LLC
    Inventors: Russell Randall Pearce, Scott A. Bohr, Aed M. Dudar, Dennis Seung-Man Yang
  • SYSTEMS AND METHODS FOR DETERMINING THE INTEGRITY OF A VEHICLE FUEL SYSTEM
    Publication number: 20150198103
    Abstract: A method, comprising: indicating a leak of a first diameter on a canister side of a fuel system following applying a vacuum to the fuel system with a fuel tank isolation valve closed; and indicating a leak of a second diameter on a fuel tank side of the fuel system, based on a vacuum decay in an isolated fuel tank following applying a vacuum to the fuel system with the fuel tank isolation valve open. In this way, an evaporative leak check module with a single reference orifice may be used to determine leaks of multiple sizes in multiple sectors of a fuel system. This may allow current production models to meet more stringent emissions regulations in the future.
    Type: Application
    Filed: January 14, 2014
    Publication date: July 16, 2015
    Applicant: Ford Global Technologies, LLC
    Inventors: Aed M. Dudar, Dennis Seung-Man Yang, Russell Randall Pearce
  • SYSTEMS AND METHODS FOR DETERMINING THE INTEGRITY OF A VEHICLE FUEL SYSTEM
    Publication number: 20150198123
    Abstract: A method, comprising: indicating leakage on a canister side of a fuel system based on a first fuel system pressure following applying a vacuum to the fuel system with a fuel tank isolation valve closed; and indicating leakage on a fuel tank side of the fuel system based on the first fuel system pressure and a second fuel system pressure following applying a vacuum to the fuel system with the fuel tank isolation valve open. In this way, an ELCM with a single reference orifice may be used to perform a leak test with two different thresholds for leak detection. This may allow vehicles currently in production to meet future emissions standards without costly upgrades to the ELCM.
    Type: Application
    Filed: January 14, 2014
    Publication date: July 16, 2015
    Applicant: Ford Global Technologies, LLC
    Inventors: Russell Randall Pearce, Mark W. Peters, Aed M. Dudar, Dennis Seung-Man Yang
  • SYSTEMS AND METHODS FOR MANAGING BLEED EMISSIONS IN PLUG-IN HYBRID ELECTRIC VEHICLES
    Publication number: 20150158378
    Abstract: A method for a plug-in hybrid electric vehicle, comprising: during a first condition, including an engine-off condition and the plug-in hybrid electric vehicle coupled to an external power source; heating a fuel vapor canister based on a fuel tank vacuum; and opening a fuel tank isolation valve to draw heated vapors into a fuel tank. In this way, a passive purge operation may be executed, thereby purging the fuel vapor canister without forcing the engine to turn on. Thus, the vehicle may be operated at peak fuel economy without increasing emissions.
    Type: Application
    Filed: December 9, 2013
    Publication date: June 11, 2015
    Applicant: FORD GLOBAL TECHNOLOGIES, LLC
    Inventors: Aed M. Dudar, Dennis Seung-Man Yang, Russell Randall Pearce
  • SYSTEMS AND METHODS FOR MANAGING BLEED EMISSIONS IN PLUG-IN HYBRID ELECTRIC VEHICLES
    Publication number: 20150158377
    Abstract: A method for a plug-in hybrid electric vehicle, comprising: during a first condition, including an engine-off condition and the plug-in hybrid electric vehicle coupled to an external power source, cooling a vapor canister based on an ambient temperature. In this way, bleed emissions may be reduced in PHEVs during conditions when the vehicle is parked and recharging at a high ambient temperature.
    Type: Application
    Filed: December 9, 2013
    Publication date: June 11, 2015
    Applicant: Ford Global Technologies, LLC
    Inventors: Aed M. Dudar, Dennis Seung-Man Yang, Russell Randall Pearce
  • Systems and methods for managing bleed emissions in plug-in hybrid electric vehicles
    Patent number: 9050885
    Abstract: A method for a plug-in hybrid electric vehicle, comprising: during a first condition, including an engine-off condition and the plug-in hybrid electric vehicle coupled to an external power source, cooling a vapor canister based on an ambient temperature. In this way, bleed emissions may be reduced in PHEVs during conditions when the vehicle is parked and recharging at a high ambient temperature.
    Type: Grant
    Filed: December 9, 2013
    Date of Patent: June 9, 2015
    Assignee: Ford Global Technologies, LLC
    Inventors: Aed M. Dudar, Dennis Seung-Man Yang, Russell Randall Pearce
  • SYSTEM AND METHODS FOR DIAGNOSING PREMATURE REFUELING SHUTOFF
    Publication number: 20150142293
    Abstract: A method for localizing restrictions in a fuel system during refueling, comprising: monitoring fuel tank pressure, fuel vapor canister temperature, and evaporative leak check module pressure during a refueling event; and responsive to a premature shutoff event, indicating a location of a restriction among a plurality of locations based on whether monitored pressure and temperature changes during the refueling event are greater than respective thresholds. In this way, the cause of a premature shutoff event may be diagnosed without requiring additional sensors within the fuel system.
    Type: Application
    Filed: November 19, 2013
    Publication date: May 21, 2015
    Applicant: Ford Global Technologies, LLC
    Inventors: Aed M. Dudar, Russell Randall Pearce, Scott A. Bohr, Dennis Seung-Man Yang
  • REFUELING DETECTION METHOD
    Publication number: 20150121999
    Abstract: Embodiments for detecting fuel events are presented. In an embodiment, a method comprises performing an action responsive to a fuel event indicated based on output from a hydrocarbon sensor positioned between a fuel tank and a fuel vapor canister. In this way, the hydrocarbon sensor may be used to detect fuel events and engine operation may be adjusted accordingly.
    Type: Application
    Filed: November 4, 2013
    Publication date: May 7, 2015
    Applicant: Ford Global Technologies, LLC
    Inventors: Aed M. Dudar, Dennis Seung-Man Yang
  • METHOD AND SYSTEM FOR ADJUSTING A FUEL TANK ISOLATION VALVE
    Publication number: 20150122229
    Abstract: Methods and systems are provided for adjusting and diagnosing a position of a fuel tank isolation valve (FTIV) of a fuel system. In one example, a method comprises adjusting a FTIV of a fuel system by sending an electrical pulse to the FTIV; and comparing a current draw of the FTIV to a known current draw profile to verify the position of the FTIV. In this way, the position of the FTIV may be diagnosed, thereby resulting in increased accuracy of subsequent valve control.
    Type: Application
    Filed: September 25, 2014
    Publication date: May 7, 2015
    Inventors: Aed M. Dudar, Dennis Seung-Man Yang, Robert Roy Jentz, Robert Ognjanovski, JR., Brian Thomas Aitken
  • METHOD FOR PURGING OF AIR INTAKE SYSTEM HYDROCARBON TRAP
    Publication number: 20150120108
    Abstract: Methods and systems are provided for improving air intake system hydrocarbon trap purging during engine-off time in a hybrid electric vehicle. One method includes opening the throttle during vehicle motion under battery operation and allowing airflow through the trap to purge its contents into the fuel canister via the canister purge valve. Upon transition into the engine-on mode, fuel vapors are released from the canister into the engine intake.
    Type: Application
    Filed: October 31, 2013
    Publication date: April 30, 2015
    Applicant: Ford Global Technologies, LLC
    Inventors: Aed M. Dudar, Dennis Seung-Man Yang, Timothy Watkins
  • FUEL SYSTEM CANISTER PURGE CONTROL
    Publication number: 20150120110
    Abstract: Methods and systems are provided for improving canister purging during the limited engine operation time in a hybrid electric vehicle. Prior to a transition into an engine-on mode, a canister heater is operated to heat the canister to an optimum temperature based on vehicle operating conditions. Upon transition into the engine-on mode, fuel vapors released from the heated canister are purged to an engine intake.
    Type: Application
    Filed: October 31, 2013
    Publication date: April 30, 2015
    Applicant: Ford Global Technologies, LLC
    Inventors: Dennis Seung-Man Yang, Aed M. Dudar
  • COOLING FAN ASSISTED ENGINE-OFF NATURAL VACUUM TEST
    Publication number: 20150120133
    Abstract: A method for a vehicle fuel system, comprising: during an engine-off condition, including an ambient temperature within a threshold range, operating a cooling fan to increase a fuel tank vacuum; and indicating leaks in the vehicle fuel system based on the increased vacuum. In this way, an EONV test may be run at mild ambient temperatures which would not otherwise result in the development of adequate fuel tank vacuum to pass the EONV test.
    Type: Application
    Filed: October 29, 2013
    Publication date: April 30, 2015
    Applicant: Ford Global Technologies, LLC
    Inventors: Aed M. Dudar, Robert Roy Jentz, Dennis Seung-Man Yang, Russell Randall Pearce
  • FUEL SYSTEM LEAK CHECK BASED ON FUEL REID VAPOR PRESSURE
    Publication number: 20150114089
    Abstract: A method for an evaporative emissions leak test, comprising: adjusting a pressure threshold based on a fuel volatility of a fuel contained in a fuel tank; and performing the evaporative emissions leak test based on the adjusted pressure threshold. By determining fuel volatility and adjusting a pressure threshold based on the fuel volatility, a more robust and accurate evaporative emissions leak test may be employed without adding additional components to a fuel system.
    Type: Application
    Filed: October 31, 2013
    Publication date: April 30, 2015
    Applicant: Ford Global Technologies, LLC
    Inventors: Aed M. Dudar, Dennis Seung-Man Yang, Rob Ognjanovski, JR.
  • INFERENTIAL METHOD AND SYSTEM FOR EVAP SYSTEM LEAK DETECTION
    Publication number: 20150090008
    Abstract: A method for detecting leaks in an evaporative emission control system. The method begins by activating a PCM at a selected interval, for a selected period. During the selected period, the PCM monitors system pressure and temperature. The PCM then determines a relationship between changes in system temperature and changes in system pressure, and it identifies a leak based on predetermined criteria related to the relationship. The relationship can be the ideal gas law, which allows the calculation of an expected pressure, based upon differences in temperature. If the actual pressure is considerably below the expected pressure, then one can infer the presence of a leak.
    Type: Application
    Filed: October 1, 2013
    Publication date: April 2, 2015
    Applicant: FORD GLOBAL TECHNOLOGIES, LLC
    Inventors: RUSSELL RANDALL PEARCE, AED M. DUDAR, DENNIS SEUNG-MAN YANG, SCOTT A. BOHR
  • HYBRID VEHICLE FUEL VAPOR CANISTER
    Publication number: 20150090233
    Abstract: Embodiments for controlling fuel vapors are provided. In one example, a method comprises initiating a purge of a fuel vapor canister responsive to a temperature profile at a vent side of the fuel vapor canister. In this way, release of fuel vapors to the atmosphere may be reduced.
    Type: Application
    Filed: September 27, 2013
    Publication date: April 2, 2015
    Applicant: Ford Global Technologies, LLC
    Inventors: Aed M. Dudar, Dennis Seung-Man Yang