Patents by Inventor Dennis Seung-Man Yang

Dennis Seung-Man Yang 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).

  • SYSTEMS AND METHODS FOR FUEL VAPOR CANISTER PURGE
    Publication number: 20170260918
    Abstract: Methods and systems are provided for controlling the purging of a fuel vapor canister coupled to a vehicle fuel tank, configured for capturing and storing vapors emanating from the tank. In one example, two canister purge valves are coupled in series in a fuel vapor conduit between the fuel vapor canister and engine intake, one at the intake manifold and one at the fuel vapor canister, such that fine control over the introduction of fuel vapors into the engine is maintained via the purge valve at the intake manifold, while thorough purging of the fuel vapor canister may be regulated via the purge valve at the fuel vapor canister. In this way, fuel vapors in the fuel vapor canister may be effectively purged to intake, thus reducing the potential for undesired evaporative emissions.
    Type: Application
    Filed: March 9, 2016
    Publication date: September 14, 2017
    Inventors: Aed M. Dudar, Donald Ignasiak, Dennis Seung-Man Yang, Russell Randall Pearce, Mark W. Peters, Niels Christopher Kragh
  • Systems and methods for inferring fuel vapor canister loading rate
    Patent number: 9745907
    Abstract: A method is provided, comprising indicating a fuel vapor canister load based on a steady-state pressure in a vapor recovery line during a refueling event; and adjusting a canister purging operation in response to the indicated fuel vapor canister load. Restrictions in the vapor recovery line may increase the rate of fuel vapor canister loading during a refueling event. In this way, an accurate canister load may be determined following a refueling event, and canister purging operations adjusted accordingly.
    Type: Grant
    Filed: January 27, 2015
    Date of Patent: August 29, 2017
    Assignee: Ford Global Technologies, LLC
    Inventors: Aed M. Dudar, Russell Randall Pearce, Dennis Seung-Man Yang
  • System and methods for regulating fuel vapor flow in a fuel vapor recirculation line
    Patent number: 9732706
    Abstract: Methods and systems are provided for regulating the flow of fuel vapors exiting a fuel tank. In one example, a method for an engine may include adjusting an amount of fuel vapors flowing through a fuel vapor recirculation line, where the recirculation line may be coupled on a first end to a fuel tank and on an opposite second end to a fuel fill inlet. The valve may be adjusted to a more open position to increase fuel vapor flow through the recirculation line in response to increases in hydrocarbon emissions from a fuel vapor canister, and to a more closed position to reduce fuel vapor flow through the recirculation line in response to increases in hydrocarbon emissions from the fuel fill inlet.
    Type: Grant
    Filed: August 12, 2015
    Date of Patent: August 15, 2017
    Assignee: Ford Global Technologies, LLC
    Inventors: Aed M. Dudar, Dennis Seung-Man Yang, Russell Randall Pearce
  • Systems and methods for depressurizing a fuel tank
    Patent number: 9709006
    Abstract: Methods and systems are provided for depressurizing a fuel tank prior to refueling the fuel tank. One example method includes adjusting a latchable refueling valve to a latched open position to enable vapor flow from the fuel tank to a vapor canister at a first rate, and responsive to fuel tank pressure being higher than a first pressure threshold after a pre-determined duration at the latched open position, modifying the latchable refueling valve to an unlatched open position. The unlatched open position of the latchable refueling valve enables a second flow rate for fuel vapors, the second flow rate higher than the first flow rate at the latched open position.
    Type: Grant
    Filed: April 8, 2015
    Date of Patent: July 18, 2017
    Assignee: Ford Global Technologies, LLC
    Inventors: Mark W. Peters, Bryan Michael Bolger, Dennis Seung-Man Yang, Russell Randall Pearce
  • SYSTEMS AND METHODS FOR PREVENTING FUEL TANK OVERFILLING
    Publication number: 20170174501
    Abstract: Methods and systems are provided for enabling a vehicle operator to select a desired amount of fuel to add to a fuel tank, and wherein overfilling of the tank is prevented by pressurizing the fuel system with an onboard pump. In one example, the tank may be sealed to induce an automatic shutoff of a refueling dispenser if the fuel level is below the capacity of the tank, and in another example, wherein it is indicated that the tank is full, the fuel system may be pressurized via the pump to induce automatic shutoff of the refueling dispenser and to prevent further overfilling of the tank. In this way, vehicle operators may add desired amounts of fuel to the tank wherein shutoff of the refueling dispenser is automatic, and wherein liquid fuel entering an evaporative emissions control system as a result of overfilling a fuel tank is prevented.
    Type: Application
    Filed: December 21, 2015
    Publication date: June 22, 2017
    Inventors: Aed M. Dudar, Dennis Seung-Man Yang, Sheven Sharp, Russell Randall Pearce, Donald Ignasiak, Bryan Michael Bolger
  • Canister purge valve system
    Patent number: 9683525
    Abstract: Systems and methods are described for a canister purge valve. A method comprises rotating an armature within a valve body in the canister purge valve as the canister purge valve opens and closes during a purge operation. The armature is encircled at a first end by an elastomer seal with multiple angled wings that enable rotation of the armature about a central longitudinal axis during the purge operation.
    Type: Grant
    Filed: September 11, 2014
    Date of Patent: June 20, 2017
    Assignee: Ford Global Technologies, LLC
    Inventors: Keith Scott Koller, Kevin William Plymale, Dennis Seung-Man Yang, Michael Wene
  • Systems and methods for reducing bleed emissions
    Patent number: 9677512
    Abstract: A method for a fuel system is provided. A vacuum is applied to a fuel vapor canister side of the fuel system, and hydrocarbon breakthrough is indicated responsive to a fuel vapor canister side pressure inflection point indicative of a decay in fuel vapor canister side vacuum. In this way, an evaporative leak check module may perform a leak check on a fuel vapor canister, while hydrocarbon breakthrough from the fuel vapor canister may be indicated without requiring a dedicated hydrocarbon sensor in the canister vent line.
    Type: Grant
    Filed: April 29, 2015
    Date of Patent: June 13, 2017
    Assignee: Ford Global Technologies, LLC
    Inventors: Aed M. Dudar, Dennis Seung-Man Yang, Russell Randall Pearce, Mohammad R. Aghili
  • Systems and methods for determining the integrity of a vehicle fuel system
    Patent number: 9669705
    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: Grant
    Filed: January 14, 2014
    Date of Patent: June 6, 2017
    Assignee: Ford Global Technologies, LLC
    Inventors: Russell Randall Pearce, Mark W. Peters, Aed M. Dudar, Dennis Seung-Man Yang
  • Systems and methods for determining the integrity of a vehicle fuel system
    Patent number: 9664145
    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: Grant
    Filed: January 14, 2014
    Date of Patent: May 30, 2017
    Assignee: Ford Global Technologies, LLC
    Inventors: Aed M. Dudar, Dennis Seung-Man Yang, Russell Randall Pearce
  • SYSTEMS AND METHODS FOR FUEL TANK PRESSURE CONTROL
    Publication number: 20170114733
    Abstract: A method is presented wherein during a first condition that includes a fuel tank pressure above a threshold, a fuel tank is fluidically coupled to a fuel vapor canister while a fuel vapor canister vent path is restricted, and a degree of restriction of the fuel vapor canister vent path is modulated. Modulating the degree of restriction of the fuel vapor canister vent path allows a fuel tank to be depressurized at a controlled rate. In this way, excess fuel tank pressure can be relieved, even if a vehicle engine is not operating in a combustion mode.
    Type: Application
    Filed: October 22, 2015
    Publication date: April 27, 2017
    Inventors: Mohammad R. Aghili, Aed M. Dudar, Dennis Seung-Man Yang
  • Fuel vapor canister purge using reversible vacuum pump
    Patent number: 9611817
    Abstract: A method for a fuel system, comprising: during a first condition, purging fuel vapor from a fuel vapor canister to a fuel vapor accumulator; and then during a second condition, evacuating fuel vapor from the fuel vapor accumulator to a fuel tank. The fuel vapor accumulator increases the volume of the fuel system, providing a temporary storage for desorbed fuel vapor. In this way, canister breakthrough of hydrocarbons can be mitigated, thereby reducing bleed emissions.
    Type: Grant
    Filed: August 21, 2014
    Date of Patent: April 4, 2017
    Assignee: Ford Global Technologies, LLC
    Inventors: Aed M. Dudar, Dennis Seung-Man Yang, Russell Randall Pearce
  • SYSTEMS AND METHODS FOR A LATCHABLE REFUELING VALVE
    Publication number: 20170050512
    Abstract: Methods and systems are provided for a latchable refueling valve designed to reduce noise associated with opening and closing the valve. In one example, a system may include a valve armature with first and second latch indices formed on an outer diameter of the armature. The latch indices may be rounded and configured to engage with a latch guide to enable rotation between the armature and the latch guide.
    Type: Application
    Filed: August 19, 2015
    Publication date: February 23, 2017
    Inventors: Robert Ognjanovski, JR., Dennis Seung-Man Yang, Kevin Lucka, Russell Randall Pearce
  • SYSTEM AND METHODS FOR REGULATING FUEL VAPOR FLOW IN A FUEL VAPOR RECIRCULATION LINE
    Publication number: 20170045019
    Abstract: Methods and systems are provided for regulating the flow of fuel vapors exiting a fuel tank. In one example, a method for an engine may include adjusting an amount of fuel vapors flowing through a fuel vapor recirculation line, where the recirculation line may be coupled on a first end to a fuel tank and on an opposite second end to a fuel fill inlet. The valve may be adjusted to a more open position to increase fuel vapor flow through the recirculation line in response to increases in hydrocarbon emissions from a fuel vapor canister, and to a more closed position to reduce fuel vapor flow through the recirculation line in response to increases in hydrocarbon emissions from the fuel fill inlet.
    Type: Application
    Filed: August 12, 2015
    Publication date: February 16, 2017
    Inventors: Aed M. Dudar, Dennis Seung-Man Yang, Russell Randall Pearce
  • SYSTEMS AND METHODS FOR DETECTION AND MITIGATION OF LIQUID FUEL CARRYOVER IN AN EVAPORATIVE EMISSIONS SYSTEM
    Publication number: 20170008390
    Abstract: Methods and systems are provided for detecting and mitigating the presence of liquid fuel carryover in an evap system of a vehicle in response to a refueling event. In one example, during a first condition, a vacuum pump is activated to pressurize the fuel system responsive to a first fuel tank pressure decay rate being less than a threshold, and responsive to a second fuel tank pressure decay rate being greater than a threshold, the vacuum pump is maintained on until a fuel tank pressure decreases to atmospheric pressure. In this way, liquid fuel carryover can be quickly and accurately diagnosed, such that mitigating actions may be taken to ensure liquid fuel is returned to the tank prior to contacting the adsorbent material within the vapor canister.
    Type: Application
    Filed: July 9, 2015
    Publication date: January 12, 2017
    Inventors: Aed M. Dudar, Dennis Seung-Man Yang, Robert Ognjanovski, JR., Russell Randall Pearce
  • SYSTEMS AND METHODS FOR OPERATING AN EVAPORATIVE EMISSIONS SYSTEM
    Publication number: 20160377005
    Abstract: Methods and systems are provided for selectively cooling a fuel vapor canister based on vehicle operating conditions, or in response to an anticipated or requested refueling event. In one example, canister cooling elements are powered by solar cells coupled to the vehicle, thereby cooling the canister during conditions wherein bleed emissions are likely to occur. In this way, canister cooling may reduce hydrocarbon vapor bleed emissions without draining the vehicle battery, and may further provide opportunities to advantageously conduct leak tests on the evaporative emissions system.
    Type: Application
    Filed: June 23, 2015
    Publication date: December 29, 2016
    Inventors: Aed M. Dudar, Dennis Seung-Man Yang, Russell Randall Pearce
  • FUEL TANK BAFFLE WITH PIVOTABLE VANES
    Publication number: 20160368373
    Abstract: Methods and systems are provided for regulating fuel flow in a fuel tank. In one example, a method may comprise fueling a fuel tank by receiving a nozzle into a filler tube which extends into a fuel tank to fuel the fuel tank, and directing fuel through the tube against vanes in a baffle which forms a compartment within the tank. Additionally, the method may comprise enabling the vanes to open so that pressure within the compartment remains below a level which would otherwise cause shut off the nozzle during the fueling.
    Type: Application
    Filed: June 22, 2015
    Publication date: December 22, 2016
    Inventors: Aed M. Dudar, Dennis Seung-Man Yang, Rob Ognjanovski, JR.
  • Air intake system hydrocarbon trap purging
    Patent number: 9518540
    Abstract: Methods and systems for purging a hydrocarbon trap in an engine intake in a vehicle are disclosed. In one example approach, a method comprises during an engine off condition, operating a pump in a purge line coupled to a fuel vapor canister in an emission control system to deliver fuel stored in a hydrocarbon trap in an intake of the engine to the fuel vapor canister.
    Type: Grant
    Filed: April 30, 2013
    Date of Patent: December 13, 2016
    Assignee: Ford Global Technologies, LLC
    Inventors: Russell Randall Pearce, Aed M. Dudar, Dennis Seung-Man Yang
  • Method and system for adjusting a fuel tank isolation valve
    Patent number: 9518677
    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: Grant
    Filed: September 25, 2014
    Date of Patent: December 13, 2016
    Assignee: Ford Global Technologies, LLC
    Inventors: Aed M. Dudar, Dennis Seung-Man Yang, Robert Roy Jentz, Robert Ognjanovski, Jr., Brian Thomas Aitken
  • Systems and methods for operating an evaporative emissions system
    Patent number: 9512791
    Abstract: Methods and systems are provided for selectively cooling a fuel vapor canister based on vehicle operating conditions, or in response to an anticipated or requested refueling event. In one example, canister cooling elements are powered by solar cells coupled to the vehicle, thereby cooling the canister during conditions wherein bleed emissions are likely to occur. In this way, canister cooling may reduce hydrocarbon vapor bleed emissions without draining the vehicle battery, and may further provide opportunities to advantageously conduct leak tests on the evaporative emissions system.
    Type: Grant
    Filed: June 23, 2015
    Date of Patent: December 6, 2016
    Assignee: Ford Global Technologies, LLC
    Inventors: Aed M. Dudar, Dennis Seung-Man Yang, Russell Randall Pearce
  • METHOD FOR DETECTING FUEL SYSTEM DEGRADATION
    Publication number: 20160341141
    Abstract: Methods and systems are provided for detecting leaks in an engine fuel system coupled in a vehicle including a first fuel tank and a second fuel tank, and a canister coupled together via a three-way valve. A leak test may be initially performed on the first fuel tank by supplying vacuum to the first fuel tank. The second fuel tank may be tested for leaks immediately following the leak test on the first fuel tank by recycling vacuum from the first fuel tank.
    Type: Application
    Filed: May 22, 2015
    Publication date: November 24, 2016
    Inventors: Aed M. Dudar, Russell Randall Pearce, Dennis Seung-Man Yang