Patents by Inventor Mrdjan J. Jankovic

Mrdjan J. Jankovic 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).

  • Publication number: 20210046925
    Abstract: A computer includes a processor and a memory, the memory storing instructions executable by the processor to generate an ellipse around a target vehicle, identify an intersection point between the ellipse and a line extending from a host vehicle to the target vehicle, identify a line tangent to the ellipse at the intersection point, and actuate one or more components of the host vehicle to avoid locations represented by the line tangent to the ellipse.
    Type: Application
    Filed: August 16, 2019
    Publication date: February 18, 2021
    Applicant: Ford Global Technologies, LLC
    Inventors: Phillip Bonkoski, Mrdjan J. Jankovic
  • Patent number: 10920689
    Abstract: Methods and systems are provided for improving engine torque response during transient condition. In one example, a method may include adjusting intake throttle and exhaust waste-gate valve based on the operator torque demand and concurrently, scheduling exhaust gas recirculation (EGR) and variable cam timing (VCT) based on a predicted torque shortfall ratio. The scheduling of EGR and VCT is independent of the actual position of intake throttle and exhaust waste-gate valve.
    Type: Grant
    Filed: April 10, 2017
    Date of Patent: February 16, 2021
    Assignee: Ford Global Technologies, LLC
    Inventors: John Erik Mikael Hellstrom, Mrdjan J. Jankovic, Michael Howard Shelby, John Eric Rollinger, Adam J. Richards, Paul A. Pietrzyk
  • Publication number: 20200291883
    Abstract: Systems and methods for determining fuel delay in a fuel injected engine with cylinders that may be deactivated are presented. In one example, the fuel injection delay is determined via a cylinder firing schedule array when the cylinder firing schedule array is available. The fuel injection delay is determined via weighted average of a fuel injection delay of a present engine cycle and a fuel injection delay of a past engine cycle when the cylinder firing schedule array is not available.
    Type: Application
    Filed: May 28, 2020
    Publication date: September 17, 2020
    Inventors: Stephen William Magner, Mrdjan J. Jankovic
  • Patent number: 10718286
    Abstract: Systems and methods for injecting fuel to an engine in response to a fuel injection delay are presented. The method includes determining fuel delay in a fuel injected engine with cylinders that may be deactivated. In one example, the fuel injection delay is determined via a cylinder firing schedule array when the cylinder firing schedule array is available. The fuel injection delay is determined via a weighted average of a fuel injection delay of a present engine cycle and a fuel injection delay of a past engine cycle when the cylinder firing schedule array is not available.
    Type: Grant
    Filed: August 23, 2016
    Date of Patent: July 21, 2020
    Assignee: Ford Global Technologies, LLC
    Inventors: Stephen William Magner, Mrdjan J. Jankovic
  • Publication number: 20200225670
    Abstract: A planned acceleration of a vehicle and a predicted optimal acceleration of a target is determined. Upon determining that an actual acceleration of the target differs from the predicted optimal acceleration, the planned acceleration of the vehicle is revised based on the actual acceleration of the target.
    Type: Application
    Filed: January 16, 2019
    Publication date: July 16, 2020
    Applicant: Ford Global Technologies, LLC
    Inventors: MRDJAN J. JANKOVIC, MARIO ANTHONY SANTILLO
  • Patent number: 10605180
    Abstract: Methods and systems are provided for coordinated control of a compound boosting system, including a first compressor staged upstream of a second compressor in an engine intake. In one example, a method may include operating the second, downstream compressor in steady-state to achieve an overall pressure ratio across the compound boosting system while operating the first, upstream compressor transiently, based on an airflow shortfall at the downstream compressor. A timing and amount of electric assistance provided to transiently operate the first, upstream compressor may be adjusted dynamically as the pressure ratio across the second compressor changes.
    Type: Grant
    Filed: August 31, 2017
    Date of Patent: March 31, 2020
    Assignee: Ford Global Technologies, LLC
    Inventors: Baitao Xiao, Mrdjan J. Jankovic, Julia H. Buckland, David Bell, Tyler Kelly, Timothy Stolzenfeld, John Eric Rollinger
  • Patent number: 10563606
    Abstract: A method is provided for controlling an engine exhaust with an upstream sensor and a downstream sensor. The method comprises adjusting a set-point for the downstream sensor based on a rate of change of air mass flow upstream of the engine and adjusting fuel injection to control exhaust fuel-air ratio (FAR) at the downstream sensor to the adjusted set-point, and to control exhaust FAR at the upstream sensor to an upstream sensor set-point.
    Type: Grant
    Filed: March 1, 2012
    Date of Patent: February 18, 2020
    Assignee: Ford Global Technologies, LLC
    Inventors: Stephen William Magner, Mrdjan J. Jankovic
  • Patent number: 10267202
    Abstract: Methods and systems are provided for catalyst control. In one example, a method may include controlling an air-fuel ratio downstream of a catalyst by adjusting fuel injection. The fuel injection is adjusted based on control parameters updated online through system identification at a point of feedback control instability.
    Type: Grant
    Filed: October 4, 2016
    Date of Patent: April 23, 2019
    Assignee: Ford Global Technologies, LLC
    Inventors: Stephen William Magner, Mrdjan J. Jankovic, Mario Anthony Santillo
  • Patent number: 10240516
    Abstract: Methods and systems are provided for controlling a wastegate coupled to a turbine. In one example, a method may include during steady engine operation, actuating a wastegate to introduce an oscillation in boost pressure, and updating gain of a wastegate feedback controller responsive to the oscillation in boost pressure.
    Type: Grant
    Filed: August 21, 2018
    Date of Patent: March 26, 2019
    Assignee: Ford Global Technologies, LLC
    Inventors: Hamid-Reza Ossareh, Baitao Xiao, Mrdjan J. Jankovic, Dave G. Hagner, Julia Helen Buckland
  • Patent number: 10221792
    Abstract: A system and method are described for reducing NOx emissions following deceleration fuel shut off (DFSO). The method comprises: cutting off fuel to the engine during a deceleration event; open loop operating the engine air/fuel ratio rich of stoichiometry for a predetermined time after the deceleration event; feedback controlling the air/fuel ratio on average near a value rich of stoichiometry for a preselected time after said predetermined time; and feedback controlling the air/fuel ratio returning to stoichiometry after the preselected time.
    Type: Grant
    Filed: August 15, 2013
    Date of Patent: March 5, 2019
    Assignee: Ford Global Technologies, LLC
    Inventors: Mario Santillo, Mrdjan J. Jankovic, Steve William Magner, Michael James Uhrich
  • Publication number: 20190063347
    Abstract: Methods and systems are provided for coordinated control of a compound boosting system, including a first compressor staged upstream of a second compressor in an engine intake. In one example, a method may include operating the second, downstream compressor in steady-state to achieve an overall pressure ratio across the compound boosting system while operating the first, upstream compressor transiently, based on an airflow shortfall at the downstream compressor. A timing and amount of electric assistance provided to transiently operate the first, upstream compressor may be adjusted dynamically as the pressure ratio across the second compressor changes.
    Type: Application
    Filed: August 31, 2017
    Publication date: February 28, 2019
    Inventors: Baitao Xiao, Mrdjan J. Jankovic, Julia H. Buckland, David Bell, Tyler Kelly, Timothy Stolzenfeld, John Eric Rollinger
  • Patent number: 10202910
    Abstract: Embodiments for operating an engine with skip fire are provided. In one example, a method comprises during a skip fire mode or during a skip fire mode transition, port injecting a first fuel quantity to a cylinder of an engine, the first fuel quantity based on a first, predicted air charge amount for the cylinder and lean of a desired air-fuel ratio, and direct injecting a second fuel quantity to the cylinder, the second fuel quantity based on the first fuel quantity and a second, calculated air charge amount for the cylinder.
    Type: Grant
    Filed: January 22, 2015
    Date of Patent: February 12, 2019
    Assignee: Ford Global Technologies, LLC
    Inventors: Thomas G. Leone, John Eric Rollinger, Mrdjan J. Jankovic, Brad Alan Boyer
  • Publication number: 20180355788
    Abstract: Methods and systems are provided for controlling a wastegate coupled to a turbine. In one example, a method may include during steady engine operation, actuating a wastegate to introduce an oscillation in boost pressure, and updating gain of a wastegate feedback controller responsive to the oscillation in boost pressure.
    Type: Application
    Filed: August 21, 2018
    Publication date: December 13, 2018
    Inventors: Hamid-Reza Ossareh, Baitao Xiao, Mrdjan J. Jankovic, Dave G. Hagner, Julia Helen Buckland
  • Patent number: 10107184
    Abstract: Methods and systems are provided for controlling a wastegate coupled to a turbine. In one example, a method may include during steady engine operation, actuating a wastegate to introduce an oscillation in boost pressure, and updating gain of a wastegate feedback controller responsive to the oscillation in boost pressure.
    Type: Grant
    Filed: September 6, 2016
    Date of Patent: October 23, 2018
    Assignee: Ford Global Technologies, LLC
    Inventors: Hamid-Reza Ossareh, Baitao Xiao, Mrdjan J. Jankovic, David G. Hagner, Julia Helen Buckland
  • Patent number: 10100761
    Abstract: Systems and methods are provided for increasing the accuracy of air charge estimation for a cylinder that is selectively deactivatable. A controller may deactivate the cylinder in accordance with a firing pattern selected based on torque demand. An air charge estimate of the firing cylinder is then adjusted based on whether the cylinder was fired or skipped on a previous engine cycle when operating according to the selected firing pattern.
    Type: Grant
    Filed: February 17, 2017
    Date of Patent: October 16, 2018
    Assignee: Ford Global Technologies, LLC
    Inventors: Amey Y. Karnik, Mrdjan J. Jankovic, Michael Howard Shelby, Pravin Sashidharan
  • Publication number: 20180291823
    Abstract: Methods and systems are provided for improving engine torque response during transient condition. In one example, a method may include adjusting intake throttle and exhaust waste-gate valve based on the operator torque demand and concurrently, scheduling exhaust gas recirculation (EGR) and variable cam timing (VCT) based on a predicted torque shortfall ratio. The scheduling of EGR and VCT is independent of the actual position of intake throttle and exhaust waste-gate valve.
    Type: Application
    Filed: April 10, 2017
    Publication date: October 11, 2018
    Inventors: John Erik Mikael Hellstrom, Mrdjan J. Jankovic, Michael Howard Shelby, John Eric Rollinger, Adam J. Richards, Paul A. Pietrzyk
  • Publication number: 20180238248
    Abstract: Systems and methods are provided for increasing the accuracy of air charge estimation for a cylinder that is selectively deactivatable. A controller may deactivate the cylinder in accordance with a firing pattern selected based on torque demand. An air charge estimate of the firing cylinder is then adjusted based on whether the cylinder was fired or skipped on a previous engine cycle when operating according to the selected firing pattern.
    Type: Application
    Filed: February 17, 2017
    Publication date: August 23, 2018
    Inventors: Amey Y. Karnik, Mrdjan J. Jankovic, Michael Howard Shelby, Pravin Sashidharan
  • Patent number: 10018157
    Abstract: Methods and systems are provided for improving boost response. A continuously variable compressor recirculation valve and a wastegate are adjusted in complementary frequency bands to move compressor operation away from a surge limit and reduce boost delivery errors. An intake throttle is also concurrently adjusted to offset manifold air-flow rate errors resulting from the wastegate or recirculation valve adjustments.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: July 10, 2018
    Assignee: Ford Global Technologies, LLC
    Inventors: Mrdjan J. Jankovic, Julia Helen Buckland
  • Publication number: 20180094563
    Abstract: Methods and systems are provided for catalyst control. In one example, a method may include controlling an air-fuel ratio downstream of a catalyst by adjusting fuel injection. The fuel injection is adjusted based on control parameters updated online through system identification at a point of feedback control instability.
    Type: Application
    Filed: October 4, 2016
    Publication date: April 5, 2018
    Inventors: Stephen William Magner, Mrdjan J. Jankovic, Mario Anthony Santillo
  • Publication number: 20180066575
    Abstract: Methods and systems are provided for controlling a wastegate coupled to a turbine. In one example, a method may include during steady engine operation, actuating a wastegate to introduce an oscillation in boost pressure, and updating gain of a wastegate feedback controller responsive to the oscillation in boost pressure.
    Type: Application
    Filed: September 6, 2016
    Publication date: March 8, 2018
    Inventors: Hamid-Reza Ossareh, Baitao Xiao, Mrdjan J. Jankovic, David G. Hagner, Julia Helen Buckland