Patents by Inventor Sricharan Maruneni

Sricharan Maruneni 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).

  • Selective response control of DC-DC converters in mild hybrid electric vehicles
    Patent number: 10164522
    Abstract: A control system for a mild hybrid vehicle is configured to detect whether a main contactor is open, the main contactor being connected between a primary battery system and a bi-directional direct current to direct current (DC-DC) converter and in response to detecting that the main contactor is open: command the DC-DC converter to operate in a boost mode to excite a motor-generator unit (MGU), after the excitation of the MGU has completed, command the DC-DC converter to operate in a buck mode, determine a previous voltage regulation feedback setpoint for the DC-DC converter, and control the DC-DC converter to maintain a voltage of the secondary battery system within a desired range by inserting a delay to a voltage control loop of the DC-DC converter such that the voltage control loop mimics a bandwidth of the MGU.
    Type: Grant
    Filed: September 21, 2016
    Date of Patent: December 25, 2018
    Assignee: FCA US LLC
    Inventors: Amshumaan R. Kashyap, Sricharan Maruneni, Oliver Gross
  • SELECTIVE RESPONSE CONTROL OF DC-DC CONVERTERS IN MILD HYBRID ELECTRIC VEHICLES
    Publication number: 20180079314
    Abstract: A control system for a mild hybrid vehicle is configured to detect whether a main contactor is open, the main contactor being connected between a primary battery system and a bi-directional direct current to direct current (DC-DC) converter and in response to detecting that the main contactor is open: command the DC-DC converter to operate in a boost mode to excite a motor-generator unit (MGU), after the excitation of the MGU has completed, command the DC-DC converter to operate in a buck mode, determine a previous voltage regulation feedback setpoint for the DC-DC converter, and control the DC-DC converter to maintain a voltage of the secondary battery system within a desired range by inserting a delay to a voltage control loop of the DC-DC converter such that the voltage control loop mimics a bandwidth of the MGU.
    Type: Application
    Filed: September 21, 2016
    Publication date: March 22, 2018
    Inventors: Amshumaan R. Kashyap, Sricharan Maruneni, Oliver Gross