Patents by Inventor Nassim Khaled

Nassim Khaled 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: 10371036
    Abstract: A system and method for monitoring filtering condition in an aftertreatment system comprises measuring a first pressure upstream of a first particulate filter in the aftertreatment system. A second pressure downstream of the first particulate filter and upstream of a second particulate filter in the aftertreatment system is measured. A third pressure downstream of the second particulate filter is also measured. A difference in pressure between the second pressure and the third pressure is determined which corresponds to a filtering condition of the first particulate filter. The difference in pressure is compared with a predetermined threshold. If the difference in pressure exceeds the predetermined threshold the failure of the first particulate filter is identified.
    Type: Grant
    Filed: February 16, 2016
    Date of Patent: August 6, 2019
    Assignee: Cummins Emission Solutions Inc.
    Inventors: Nassim Khaled, Michael Haas
  • Patent number: 10364731
    Abstract: A method for asynchronously delivering a reductant to a first selective catalytic reduction system and a second selective catalytic reduction system of an aftertreatment system via a reductant insertion assembly, the reductant insertion assembly comprising a first injector fluidly coupled to the first selective catalytic reduction system and a second injector fluidly coupled to the second selective catalytic reduction system, the method including: activating the first injector; maintaining the first injector activated for a first delivery time, thereby inserting a first amount of reductant into the first selective catalytic reduction system; deactivating the first injector; activating the second injector; and maintaining the second injector activated for a second delivery time, thereby inserting a second amount of reductant into the second selective catalytic reduction system.
    Type: Grant
    Filed: August 23, 2018
    Date of Patent: July 30, 2019
    Assignee: Cummins Emission Solutions Inc.
    Inventor: Nassim Khaled
  • Publication number: 20190178130
    Abstract: A dosing module includes an inlet manifold, an outlet manifold, a first branch, and a second branch. The inlet manifold is configured to selectively receive reductant from a pump. The outlet manifold is configured to selectively provide the reductant to a nozzle. The first branch is coupled to the inlet manifold and the outlet manifold. The first branch is configured to selectively provide the reductant from the inlet manifold to the outlet manifold. The first branch includes a first flow restrictor configured to restrict the reductant as the reductant is provided to the outlet manifold. The second branch is coupled to the inlet manifold and the outlet manifold. The second branch is configured to selectively provide the reductant from the inlet manifold to the outlet manifold separately from the first branch. The second branch includes a second flow restrictor that is configured to restrict the reductant.
    Type: Application
    Filed: December 11, 2017
    Publication date: June 13, 2019
    Applicant: Cummins Emission Solutions Inc.
    Inventors: Taren DeHart, Vaibhav J. Lawand, Stephen M. Holl, Paul Douglas Free, Nassim Khaled, Colin L. Norris
  • Patent number: 10267203
    Abstract: An aftertreatment system comprises a reductant storage tank and a SCR system fluidly coupled thereto. A reductant physical level sensor and a tank temperature sensor are operatively coupled to the reductant storage tank. A controller is communicatively coupled with each of the sensors and configured to: interpret a first level output value from the physical level sensor and a first temperature output value from the tank temperature sensor. If the first level output value is below a first threshold, the controller determines if the first temperature output value is below a second threshold. If the first level output value is below the first threshold and the first temperature output value is below the second threshold, the controller determines a virtual reductant level in the reductant storage tank and indicates the virtual reductant level in lieu of a physical reductant level in the reductant storage tank to a user.
    Type: Grant
    Filed: May 2, 2017
    Date of Patent: April 23, 2019
    Assignee: Cummins Emission Solutions Inc.
    Inventors: Nassim Khaled, Bryce R. Larson, Sarang S. Sonawane, Tushar H. Sharma
  • Patent number: 10260394
    Abstract: An auto-calibration controller configured to automatically tune a dosing unit of an aftertreatment system. The auto-calibration controller is configured to command the dosing unit to dose reductant at a first dosing command rate at a first input pressure value based on a dosing command value of a dosing command table. The auto-calibration controller is further configured to interpret a parameter indicative of an actual amount of dosed reductant by the dosing unit and compare the actual amount of dosed reductant to an expected amount of dosed reductant. The auto-calibration controller is further configured to update the dosing command value of the dosing command table of a control module of the aftertreatment system responsive to the comparison of the actual amount of dosed reductant to the expected amount of dosed reductant.
    Type: Grant
    Filed: May 1, 2015
    Date of Patent: April 16, 2019
    Assignee: Cummins Emission Solutions Inc.
    Inventors: Patrick C. Hudson, Nassim Khaled
  • Publication number: 20190078818
    Abstract: A refrigeration system includes a subcooler configured to provide subcooling for a liquid refrigerant flowing through a first side of the subcooler by transferring heat from the liquid refrigerant to a gas refrigerant flowing through a second side of the subcooler. An expansion valve is located at an inlet of the second side of the subcooler and configured to control a flow of the gas refrigerant through the second side of the subcooler. A gas temperature sensor and a gas pressure sensor are configured to measure a temperature and pressure of the gas refrigerant. A liquid temperature sensor is configured to measure a temperature of the subcooled liquid refrigerant. A controller is configured to calculate a superheat of the gas refrigerant based on the measured temperature and measured pressure of the gas refrigerant and may compare the calculated superheat to a superheat threshold. If the calculated superheat is less than the superheat threshold, the controller may close the expansion valve.
    Type: Application
    Filed: September 10, 2018
    Publication date: March 14, 2019
    Applicant: Hill Phoenix, Inc.
    Inventors: Nassim Khaled, Michael Hill
  • Publication number: 20180363534
    Abstract: A method for asynchronously delivering a reductant to a first selective catalytic reduction system and a second selective catalytic reduction system of an aftertreatment system via a reductant insertion assembly, the reductant insertion assembly comprising a first injector fluidly coupled to the first selective catalytic reduction system and a second injector fluidly coupled to the second selective catalytic reduction system, the method including: activating the first injector; maintaining the first injector activated for a first delivery time, thereby inserting a first amount of reductant into the first selective catalytic reduction system; deactivating the first injector; activating the second injector; and maintaining the second injector activated for a second delivery time, thereby inserting a second amount of reductant into the second selective catalytic reduction system.
    Type: Application
    Filed: August 23, 2018
    Publication date: December 20, 2018
    Applicant: CUMMINS EMISSION SOLUTIONS INC.
    Inventor: Nassim Khaled
  • Patent number: 10156173
    Abstract: A dosing module control system includes a central controller, a flow observer, and a switching doser controller. The central controller is configured to obtain a target flow rate and a target pressure. The flow observer is configured to determine a flow rate gain. The switching doser controller is configured to communicate with the central controller and the flow observer. The switching doser controller is configured to receive the target flow rate and the target pressure from the central controller, receive the flow rate gain from the flow observer, determine a compensated flow rate based on the target flow rate, the target pressure, and the flow rate gain, and determine at least one of an injector duty cycle associated with the determined compensated flow rate, or a pump frequency associated with the determined compensated flow rate. The pump is configured to communicate with the switching doser controller.
    Type: Grant
    Filed: May 25, 2018
    Date of Patent: December 18, 2018
    Assignee: Cummins Emission Solutions Inc.
    Inventors: Masoud Ziabakhsh Deilami, Nassim Khaled
  • Patent number: 10125660
    Abstract: An aftertreatment system comprises a first SCR system, a second SCR system positioned downstream of the SCR system and a reductant storage tank. At least one reductant insertion assembly is fluidly coupled to the reductant storage tank. The at least one reductant insertion assembly is also fluidly coupled to the first SCR system and the SCR system. A controller is communicatively coupled to the reductant insertion assembly. The controller is configured to instruct the reductant insertion assembly to asynchronously insert the reductant into the first SCR system and the second SCR system.
    Type: Grant
    Filed: August 15, 2017
    Date of Patent: November 13, 2018
    Assignee: Cummins Emission Solutions Inc.
    Inventor: Nassim Khaled
  • Patent number: 10094264
    Abstract: A system for diagnosing a sensor of an exhaust aftertreatment system may include receiving a first tank level value from a sensor. A plurality of reductant dosing command values over a period of time are received. A dosed reductant value is determined responsive to the plurality of reductant dosing command values reaching a threshold integrated value. A second tank level value is received from the sensor responsive to the dosed reductant value reaching the threshold integrated value. A sensor-estimated dosing value is determined based on the difference between the first tank level value and the second tank level value. The sensor may be diagnosed as performing outside of an acceptable calibration range based on the difference between the sensor-estimated dosing value and the dosed reductant value.
    Type: Grant
    Filed: October 31, 2014
    Date of Patent: October 9, 2018
    Assignee: Cummins Emission Solutions, Inc.
    Inventors: Nassim Khaled, Vinayak Mandavkar, Deepu Chandy
  • Patent number: 10087810
    Abstract: An aftertreatment system comprises a first SCR system, a second SCR system positioned downstream of the SCR system and a reductant storage tank. At least one reductant insertion assembly is fluidly coupled to the reductant storage tank. The at least one reductant insertion assembly is also fluidly coupled to the first SCR system and the SCR system. A controller is communicatively coupled to the reductant insertion assembly. The controller is configured to instruct the reductant insertion assembly to asynchronously insert the reductant into the first SCR system and the second SCR system.
    Type: Grant
    Filed: August 15, 2017
    Date of Patent: October 2, 2018
    Assignee: Cummins Emission Solutions Inc.
    Inventor: Nassim Khaled
  • Patent number: 10087806
    Abstract: A controller including a self-tuning circuit for controlling a pressure system to output an input pressure corresponding to an input pressure value using an adaptive fuzzy control system and updating dosing command values of a dosing command table for controlling a dosing unit of an aftertreatment system. The self-tuning circuit is configured to determine an input pressure value and generate a pressure control signal using the adaptive fuzzy control system based on the input pressure value, a detected input pressure, and an error amount. The self-tuning circuit is further configured to regulate the input pressure of reductant to the dosing unit from a reductant tank using a pressure control signal for a pressure control device. The self-tuning circuit is further configured to update a dosing command value of a dosing command table of the controller in conjunction with regulating the input pressure of reductant.
    Type: Grant
    Filed: February 18, 2016
    Date of Patent: October 2, 2018
    Assignee: CUMMINS EMISSION SOLUTIONS INC.
    Inventors: Nassim Khaled, Bibin N. Pattel
  • Publication number: 20180230885
    Abstract: Systems and methods are provided for feedgas diagnostics in a selective catalytic reduction (SCR) system. An example electronic system may be part of on-board diagnostic (OBD) functionality in a diesel fuel vehicle and may comprise circuits for defining and managing system conditions for hydrocarbon dosing, adjusting the dosing to a diesel oxidation catalyst (DOC) while the system is in operation, and defining a diagnostic framework based at least on exothermic properties of various components of a DOC such that a DOC may be monitored for failure and/or end of useful life (EUL). The electronic system may include a tuning circuit for calibrating the diagnostic framework.
    Type: Application
    Filed: February 15, 2017
    Publication date: August 16, 2018
    Applicant: Cummins Emission Solutions Inc.
    Inventors: Nassim Khaled, Michael Haas, Yinghuan Lei, Richard J. Ancimer
  • Publication number: 20180216512
    Abstract: An aftertreatment system comprises a SCR system including at least one catalyst. A NOx sensor is positioned down-stream of the SCR system. A controller is configured to determine an estimated engine NOx amount in the exhaust gas produced by an engine fluidly coupled to the aftertreatment system. The controller interprets an output value indicative of a first amount of oxygen in the exhaust gas downstream of the SCR system. The controller determines an adjusted engine NOx amount in response to the output value. A NOx sensor is positioned downstream of the selective catalytic reduction system and communicatively coupled to the controller. The NOx sensor is structured to provide the output value.
    Type: Application
    Filed: July 29, 2016
    Publication date: August 2, 2018
    Applicant: Cummins Emission Solutions Inc.
    Inventors: Sriram Srinivasan, Nassim Khaled, Priya Naik
  • Patent number: 10036297
    Abstract: Implementations described herein relate to utilizing discrete transient local state space models to modify an output from a steady state NOx estimation model to provide a final estimated NOx value. An engine operating space, defined by a speed and injection quantity map, is subdivided into several discrete local state spaces and a transient model is developed for each discrete state space to output a NOx estimation correction value. The transient models may be a regression model or the transient model may be an empirical map of data values. The NOx estimation correction value modifies a steady state NOx value to calculate the final NOx estimated value. The final NOx estimated value is then output to another component, such as a controller as an input for controlling one or more components of an engine, an aftertreatment system, and/or a diagnostic system.
    Type: Grant
    Filed: July 22, 2016
    Date of Patent: July 31, 2018
    Assignee: CUMMINS EMISSION SOLUTIONS INC.
    Inventors: Nassim Khaled, Priya Naik
  • Publication number: 20180202337
    Abstract: A system structured to measure at least one of particulate matter or ammonia in an exhaust aftertreatment system. The system includes a selective catalytic reduction catalyst, a doser disposed upstream of the selective catalytic reduction catalyst, a particulate filter, and a radio frequency sensor communicatively coupled to the diesel particulate filter. The radio frequency sensor is structured to measure at least one of particulate matter or ammonia.
    Type: Application
    Filed: January 18, 2017
    Publication date: July 19, 2018
    Applicant: Cummins Emission Solutions Inc.
    Inventors: Nassim Khaled, Sriram Srinivasan
  • Publication number: 20180149058
    Abstract: An auto-calibration controller configured to automatically tune a dosing unit of an aftertreatment system. The auto-calibration controller is configured to command the dosing unit to dose reductant at a first dosing command rate at a first input pressure value based on a dosing command value of a dosing command table. The auto-calibration controller is further configured to interpret a parameter indicative of an actual amount of dosed reductant by the dosing unit and compare the actual amount of dosed reductant to an expected amount of dosed reductant. The auto-calibration controller is further configured to update the dosing command value of the dosing command table of a control module of the aftertreatment system responsive to the comparison of the actual amount of dosed reductant to the expected amount of dosed reductant.
    Type: Application
    Filed: May 1, 2015
    Publication date: May 31, 2018
    Applicant: Cummins Emission Solutions, Inc.
    Inventors: Patrick C. HUDSON, Nassim KHALED
  • Publication number: 20180051616
    Abstract: A system and method for monitoring filtering condition in an aftertreatment system comprises measuring a first pressure upstream of a first particulate filter in the aftertreatment system. A second pressure downstream of the first particulate filter and upstream of a second particulate filter in the aftertreatment system is measured. A third pressure downstream of the second particulate filter is also measured. A difference in pressure between the second pressure and the third pressure is determined which corresponds to a filtering condition of the first particulate filter. The difference in pressure is compared with a predetermined threshold. If the difference in pressure exceeds the predetermined threshold the failure of the first particulate filter is identified.
    Type: Application
    Filed: February 16, 2016
    Publication date: February 22, 2018
    Applicant: Cummins Emission Solutions, Inc.
    Inventors: Nassim KHALED, Michael HAAS
  • Publication number: 20180010508
    Abstract: An aftertreatment system comprises a first SCR system, a second SCR system positioned downstream of the SCR system and a reductant storage tank. At least one reductant insertion assembly is fluidly coupled to the reductant storage tank. The at least one reductant insertion assembly is also fluidly coupled to the first SCR system and the SCR system. A controller is communicatively coupled to the reductant insertion assembly. The controller is configured to instruct the reductant insertion assembly to asynchronously insert the reductant into the first SCR system and the second SCR system.
    Type: Application
    Filed: August 15, 2017
    Publication date: January 11, 2018
    Applicant: Cummins Emission Solutions Inc.
    Inventor: Nassim Khaled
  • Publication number: 20170350291
    Abstract: A system for determining a performance status of an exhaust aftertreatment system may include determining an ammonia-to-nitrogen ratio using a sample ammonia input value and a sample NOx input value. An actual NOx input value and an actual ammonia input value can be received. An emission value from may be received from a first sensor. A NOx emission estimate, an ammonia slip estimate, and an optimal ammonia storage value for a selective catalytic reduction may be determined using an iterative inefficiency calculation based, at least in part, on the actual NOx input value, the actual ammonia input value, and the ammonia-to-nitrogen ratio; and the NOx emission estimate, the ammonia slip estimate, and the optimal ammonia storage value may be outputted to a diagnostic system.
    Type: Application
    Filed: October 28, 2014
    Publication date: December 7, 2017
    Applicant: Cummins Emission Solutions, Inc.
    Inventor: Nassim Khaled