Patents by Inventor Prasad S. Kadle

Prasad S. Kadle 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: 10532628
    Abstract: An HVAC module having a reconfigurable bi-level duct system is disclosed. The air duct includes an air duct inlet in fluid communication with the HVAC module, an interior wall dividing the air duct into first and second air passageways, a bypass port enabling fluid communication between the first air and second air passageways. A downstream control valve disposed adjacent the bypass port and is configured to selectively direct air flow from one of the first and second air passageways to the other of the first and second air passageways. An upstream flow control valve is disposed adjacent to the inlet of the air duct, wherein the upstream flow control valve is configured to selectively direct air flow from the hot and cold chambers of the HVAC module to the first and second air passageways of the air duct.
    Type: Grant
    Filed: May 5, 2015
    Date of Patent: January 14, 2020
    Assignee: MAHLE International GmbH
    Inventors: Mingyu Wang, Yanping Xia, Wen Liu, Prasad S. Kadle, Jeffrey C. Kinmartin
  • Patent number: 10286748
    Abstract: A method controls the discharge of temperature-conditioned air from a plurality of zone outlets of an automotive HVAC system via an open architecture multi-zone HVAC unit having a single blower fan, an evaporator downstream of the blower and a heater downstream of the evaporator, wherein each zone in the module includes a temperature mix door for proportioning hot and cold air, which is controlled by a separate Discharge Temperature Maintenance control (DTM control), and an output valve for controlling a zonal output flow rate. The output valve of each zone outlet is placed in an output valve position associated with a target resistance; and the single blower fan is operated at a minimum voltage required for generating a total requested blower output flowrate.
    Type: Grant
    Filed: October 27, 2015
    Date of Patent: May 14, 2019
    Assignee: MAHLE International GmbH
    Inventors: Yanping Xia, Mingyu Wang, Wen Liu, Prasad S. Kadle, Jeffrey C. Kinmartin
  • Patent number: 9879870
    Abstract: HVAC module has an air inlet, an evaporator downstream of the blower and a heater downstream of the evaporator, and a rear mixing zone downstream of the evaporator and the heater, wherein a control valve prevents cold air from flowing back towards the hot air by regulating the pressure of the cold air. A method is devised to control anti-backflow control valve of such an HVAC module by the steps of reading pressure and temperatures at various points in the HVAC module; setting air flow and temperature discharge targets; calculating the resistance of the control valve and a bland valve; determining corresponding control valve and blend valve positions; and moving the control valve and blend valve to those corresponding positions.
    Type: Grant
    Filed: September 15, 2015
    Date of Patent: January 30, 2018
    Assignee: MAHLE International GmbH
    Inventors: Mingyu Wang, Yanping Xia, Wen Liu, Prasad S. Kadle, Jeffrey C. Kinmartin
  • Patent number: 9879891
    Abstract: Disclosed is a unitary heat pump air conditioner (HPAC) system having a refrigerant diversion loop configured to supply sufficient heat to defrost an external heat exchanger while not materially affecting the supply of heat to the passenger compartment of a vehicle. The HPAC system includes a refrigerant loop configured to pump heat from a cold coolant loop that scavenges heat from the external heat exchanger to a hot coolant loop that supplies heat to the passenger compartment. The refrigerant loop includes a condenser in thermal communication with the hot coolant loop, evaporator in thermal communication with the cold coolant loop, and a compressor to cycle the refrigerant through the refrigerant loop. The refrigerant loop further includes means to selectively divert at least a portion of the hot compressed refrigerant exiting the compressor directly to the evaporator to heat the cold coolant loop sufficient to defrost the external heat exchanger.
    Type: Grant
    Filed: March 11, 2014
    Date of Patent: January 30, 2018
    Assignee: MAHLE International GmbH
    Inventors: Carrie M Kowsky, Prasad S. Kadle, Frederick V. Oddi, Lindsey L. Leitzel
  • Patent number: 9809083
    Abstract: A heat pump cooling and heating system for an electric vehicle includes a range extending PCM heat exchanger (24), with a single acting phase change material with a melt temperature between the two comfort temperatures associated with cooling and heating, respectively. In a charging mode, as the vehicle batteries are charged, the same exterior current source runs the compressor (10), charging the PCM exchanger (24) with heat or “cold.” During an initial range extending mode, the PCM exchanger/reservoir (24) serves as the heat source or heat sink. The PCM material does not directly heat or cool the air, as is conventional, allowing a single reservoir material to be used in both heating and cooling modes.
    Type: Grant
    Filed: February 25, 2016
    Date of Patent: November 7, 2017
    Assignee: MAHLE International GmbH
    Inventors: Yanping Xia, Prasad S. Kadle, Lindsey L. Leitzel, Mingyu Wang, Timothy D. Craig
  • Patent number: 9776470
    Abstract: An automotive HVAC system includes upper and lower mode cases configured to discharge separate streams of temperature-conditioned air into front and rear passenger zones. The system separates the inlet air into separate mixing chambers, and a third stream through a heater core. Blend doors control hot and cold air streams entering their respective mixing chambers. Operation is controlled by reading requested temperature, blower rate and mode for system zone outlet, converting requests to a flowrate, calculating total flowrate as a summation of all requests, employing a math model to calculate total zonal flowrate as a summation of all zonal flowrates, calculating a blower control error as a function of the difference between total blower request and total zonal flowrate, modifying the operating state using the calculated control error, positioning and resetting the mode valves into defrost, heater and vent openings, and resetting the mode valves.
    Type: Grant
    Filed: May 20, 2014
    Date of Patent: October 3, 2017
    Assignee: MAHLE International GmbH
    Inventors: Mingyu Wang, Prasad S. Kadle, Jeffrey C. Kinmartin, Debashis Ghosh, Charles A. Archibald
  • Patent number: 9776471
    Abstract: HVAC unit has a single blower fan, an evaporator downstream of the blower and a heater downstream of the evaporator, wherein each zone outlet includes a temperature mixing door for controlling portions of hot and cold air and an output valve for controlling a zonal output flow rate. A method is devised to control the discharge of temperature-conditioned air from a plurality of zone outlets of an automotive HVAC system via such an HVAC unit by the steps of reading an operator-requested zonal discharge blower level for each of the zone outlets; converting each zonal discharge blower level request to a zonal flowrate request; calculating a total requested output flowrate as a summation of all zonal flowrate requests; and adjusting a blower voltage to a minimum voltage required for generating the total requested output flowrate.
    Type: Grant
    Filed: July 17, 2015
    Date of Patent: October 3, 2017
    Assignee: MAHLE International GmbH
    Inventors: Wen Liu, Mingyu Wang, Yanping Xia, Prasad S. Kadle, Jeffrey C. Kinmartin
  • Patent number: 9724978
    Abstract: An open architecture HVAC module is disclosed having a housing defining an air inlet and at least two adjacent air outlets. An evaporator and a heater unit are disposed within the housing. A cold air chamber is defined between the evaporator and heater unit, and a hot air chamber is defined downstream of the heater unit. A partition extends into the cold and hot air chambers from an interior surface of the housing between the two adjacent air outlets. The partition is spaced from the evaporator and heater unit. The partition cooperates with the housing to define a first mixing chamber in fluid communication with the first outlet and a second mixing chamber in fluid communication with the second outlet. A blend valve is disposed in each mixing chambers. The blend valves are configured to selectively direct air flow from the cold and hot air chambers to the air outlets.
    Type: Grant
    Filed: April 14, 2015
    Date of Patent: August 8, 2017
    Assignee: MAHLE International GmbH
    Inventors: Jeffrey C. Kinmartin, Prasad S. Kadle, Mingyu Wang, Debashis Ghosh, Steven M. Zielinski, Shamsuddin Noorani
  • Patent number: 9676253
    Abstract: A heating, ventilation, and air conditioning (HVAC) system for a vehicle includes an evaporator and a diffuser. The evaporator is configured to cool air passing through the evaporator. The diffuser is configured to direct a first portion of the air entering the diffuser through a first section of the evaporator, and direct a second portion of the air entering the diffuser through a second section of the evaporator. The evaporator and the diffuser are configured to cooperate such that air exits the first section at a first temperature and air exits the second section at a second temperature less than the first temperature.
    Type: Grant
    Filed: May 14, 2014
    Date of Patent: June 13, 2017
    Assignee: MAHLE International GmbH
    Inventors: Debashis Ghosh, Mingyu Wang, Jeffrey C. Kinmartin, Prasad S. Kadle
  • Patent number: 9494350
    Abstract: A plate-type heat exchanger having a first heat exchanger portion configured to receive a refrigerant flow and a hot side coolant flow having a lower temperature than the refrigerant flow, a second heat exchanger portion configured to receive the refrigerant flow exiting from the first heat exchanger portion and a cold side coolant flow having a higher temperature than the refrigerant flow exiting from the first heat exchanger portion, and an internal heat exchanger portion sandwiched between the first heat exchanger portion and the second heat exchanger portion. The refrigerant flow through the plate type heat exchanger is in non-contact thermal communication with the hot side coolant flow and the cold side coolant flow. The cold side coolant flow transfers heat energy to the refrigerant, which in turn transfer that heat energy to the hot side coolant flow.
    Type: Grant
    Filed: June 5, 2014
    Date of Patent: November 15, 2016
    Assignee: MAHLE International GmbH
    Inventors: Prasad S. Kadle, Gary S. Vreeland, Frederick V. Oddi
  • Publication number: 20160325599
    Abstract: An HVAC module having a reconfigurable bi-level duct system is disclosed. The air duct includes an air duct inlet in fluid communication with the HVAC module, an interior wall dividing the air duct into first and second air passageways, a bypass port enabling fluid communication between the first air and second air passageways. A downstream control valve disposed adjacent the bypass port and is configured to selectively direct air flow from one of the first and second air passageways to the other of the first and second air passageways. An upstream flow control valve is disposed adjacent to the inlet of the air duct, wherein the upstream flow control valve is configured to selectively direct air flow from the hot and cold chambers of the HVAC module to the first and second air passageways of the air duct.
    Type: Application
    Filed: May 5, 2015
    Publication date: November 10, 2016
    Inventors: MINGYU WANG, Yanping Xia, Wen Liu, Prasad S. Kadle, Jeffrey C. Kinmartin
  • Publication number: 20160305676
    Abstract: HVAC module has an air inlet, an evaporator downstream of the blower and a heater downstream of the evaporator, and a rear mixing zone downstream of the evaporator and the heater, wherein a control valve prevents cold air from flowing back towards the hot air by regulating the pressure of the cold air. A method is devised to control anti-backflow control valve of such an HVAC module by the steps of reading pressure and temperatures at various points in the HVAC module; setting air flow and temperature discharge targets; calculating the resistance of the control valve and a bland valve; determining corresponding control valve and blend valve positions; and moving the control valve and blend valve to those corresponding positions.
    Type: Application
    Filed: September 15, 2015
    Publication date: October 20, 2016
    Inventors: Mingyu Wang, Yanping Xia, Wen Liu, Prasad S. Kadle, Jeffrey C. Kinmartin
  • Publication number: 20160303941
    Abstract: An open architecture HVAC module is disclosed having a housing defining an air inlet and at least two adjacent air outlets. An evaporator and a heater unit are disposed within the housing. A cold air chamber is defined between the evaporator and heater unit, and a hot air chamber is defined downstream of the heater unit. A partition extends into the cold and hot air chambers from an interior surface of the housing between the two adjacent air outlets. The partition is spaced from the evaporator and heater unit. The partition cooperates with the housing to define a first mixing chamber in fluid communication with the first outlet and a second mixing chamber in fluid communication with the second outlet. A blend valve is disposed in each mixing chambers. The blend valves are configured to selectively direct air flow from the cold and hot air chambers to the air outlets.
    Type: Application
    Filed: April 14, 2015
    Publication date: October 20, 2016
    Inventors: JEFFREY C. KINMARTIN, PRASAD S. KADLE, MINGYU WANG, DEBASHIS GHOSH, STEVEN M. ZIELINSKI, SHAMSUDDIN NOORANI
  • Publication number: 20160298912
    Abstract: A plate-type heat exchanger having a first heat exchanger portion configured to receive a refrigerant flow and a hot side coolant flow having a lower temperature than the refrigerant flow, a second heat exchanger portion configured to receive the refrigerant flow exiting from the first heat exchanger portion and a cold side coolant flow having a higher temperature than the refrigerant flow exiting from the first heat exchanger portion, and an internal heat exchanger portion sandwiched between the first heat exchanger portion and the second heat exchanger portion. The refrigerant flow through the plate type heat exchanger is in non-contact thermal communication with the hot side coolant flow and the cold side coolant flow. The cold side coolant flow transfers heat energy to the refrigerant, which in turn transfer that heat energy to the hot side coolant flow.
    Type: Application
    Filed: June 5, 2014
    Publication date: October 13, 2016
    Inventors: PRASAD S. KADLE, GARY S. VREELAND, FREDERICK V. ODDI
  • Patent number: 9464837
    Abstract: A method of controlling an air conditioning compressor in a heating ventilation and air conditioning system having a evaporator including a phase change material is presented. The method includes the steps of measuring an evaporator output air temperature, determining a state of charge value by calculating a difference between an estimated refrigerant temperature based on the evaporator output air temperature and a phase change material freeze temperature and integrating this difference over time and operating the air conditioning compressor to maintain the state of charge value between an upper and lower limit. A method of recovering braking energy in a vehicle containing a heating ventilation and air conditioning system having the evaporator including the phase change material is also presented.
    Type: Grant
    Filed: June 28, 2013
    Date of Patent: October 11, 2016
    Assignee: MAHLE International GmbH
    Inventors: Mingyu Wang, Prasad S. Kadle, Edward Wolfe, IV
  • Patent number: 9457639
    Abstract: A heating, ventilation, and air conditioning (HVAC) system and a method of controlling a HVAC system that is configured to provide a perceived comfortable ambient environment to an occupant seated in a vehicle cabin. The system includes a nozzle configured to direct an air stream from the HVAC system to the location of a thermally sensitive portion of the body of the occupant. The system also includes a controller configured to determine an air stream temperature and an air stream flow rate necessary to establish the desired heat supply rate for the sensitive portion and provide a comfortable thermal environment by thermally isolating the occupant from the ambient vehicle cabin temperature. The system may include a sensor to determine the location of the sensitive portion. The nozzle may include a thermoelectric device to heat or cool the air stream.
    Type: Grant
    Filed: April 10, 2012
    Date of Patent: October 4, 2016
    Assignee: MAHLE International GmbH
    Inventors: Mingyu Wang, Prasad S. Kadle, Debashis Ghosh, Mark J. Zima, Edward Wolfe, IV, Timothy D Craig
  • Publication number: 20160250906
    Abstract: A heat pump cooling and heating system for an electric vehicle includes a range extending PCM heat exchanger (24), with a single acting phase change material with a melt temperature between the two comfort temperatures associated with cooling and heating, respectively. In a charging mode, as the vehicle batteries are charged, the same exterior current source runs the compressor (10), charging the PCM exchanger (24) with heat or “cold.” During an initial range extending mode, the PCM exchanger/reservoir (24) serves as the heat source or heat sink. The PCM material does not directly heat or cool the air, as is conventional, allowing a single reservoir material to be used in both heating and cooling modes.
    Type: Application
    Filed: February 25, 2016
    Publication date: September 1, 2016
    Inventors: Yanping Xia, Prasad S. Kadle, Lindsey L. Leitzel, Mingyu Wang, Timothy D. Craig
  • Patent number: 9409461
    Abstract: A system and a method of controlling a ventilation or HVAC system that is configured to provide an air stream having a comfortable contact velocity to an occupant seated in a vehicle cabin. The system includes a sensor to determine the distance from a discharge nozzle to the vehicle occupant and a controller to control the exit velocity and/or an effective diameter of the nozzle. The sensor may use ultrasonic, infrared, LIDAR, or RADAR technology to determine distance. The system may determine the distance from the nozzle to the occupant based on a seat location determined by a seat location sensor. The seat location sensor may be common to an inflatable restraint (air bag) system.
    Type: Grant
    Filed: June 21, 2012
    Date of Patent: August 9, 2016
    Assignee: MAHLE International GmbH
    Inventors: Mingyu Wang, Prasad S. Kadle, Debashis Ghosh
  • Publication number: 20160061497
    Abstract: A two-pass evaporator suitable for use in an automobile includes various pressure drop devices to aliquot refrigerant into tubes that make up the two-pass evaporator. The two-pass evaporator includes a first pressure-drop device configured to receive and expand a liquid phase refrigerant into a first mixture of two-phase refrigerant; and a second pressure-drop device configured to receive and expand the first mixture of two-phase refrigerant into a second mixture of two-phase refrigerant and aliquot the second mixture of two-phase refrigerant to the first end of the first plurality of tubes. The two-pass evaporator includes a transition manifold that may house a flow-modulation plate disposed therein and configured to segregate the transition manifold into an upstream portion and a downstream portion. The flow-modulation device works in conjunction with the upstream pressure drop devices to aliquot refrigerant from the first plurality of tubes to the second plurality of tubes.
    Type: Application
    Filed: August 26, 2014
    Publication date: March 3, 2016
    Inventors: SOURAV CHOWDHURY, PRASAD S. KADLE, CARRIE M. KOWSKY
  • Publication number: 20160046171
    Abstract: A method controls the discharge of temperature-conditioned air from a plurality of zone outlets of an automotive HVAC system via an open architecture multi-zone HVAC unit having a single blower fan, an evaporator downstream of the blower and a heater downstream of the evaporator, wherein each zone in the module includes a temperature mix door for proportioning hot and cold air, which is controlled by a separate Discharge Temperature Maintenance control (DTM control), and an output valve for controlling a zonal output flow rate. The output valve of each zone outlet is placed in an output valve position associated with a target resistance; and the single blower fan is operated at a minimum voltage required for generating a total requested blower output flowrate.
    Type: Application
    Filed: October 27, 2015
    Publication date: February 18, 2016
    Inventors: Yanping Xia, Mingyu Wang, Wen Liu, Prasad S. Kadle, Jeffrey C. Kinmartin