Delphi Technologies, Inc.

Mahle International Gmbh

Mark James Zima

Prasad Shripad Kadle

Mingyu Wang

Edward Wolfe, Iv

James A Bright

Timothy D Craig

Mohinder Singh Bhatti

Debashis Ghosh

Gregory J Kowalski

James A Acre

Joseph M Bona

Taylor R Eckstein, Jr

Pamela Sue Greenwald

Carrie M Kowsky

Sourav Chowdhury

Nick G Sabha

James J Koo

Daniel Rupp

Brian Cripps

Kevin Curtin

Daniel V Beckley

Debangshu Majumdar

Veeraj Chopra

James Alan Bright

Edward Iv Wolfe

Nick George Sabha

In a thermal fluid system, a control valve includes a flow valve and a solenoid pilot valve. The flow valve has an inlet and an outlet; a control chamber for receiving a pilot pressure; and a valve member operable by the pilot pressure to selectively open and close a fluid path from the inlet to the outlet. The pilot pressure acts in a closing direction of the flow valve. The pilot valve provides the pilot pressure to the control chamber and is a 3/2 way valve with a first port in fluid communication with the control chamber, a second port to be connected to a pressure source, and a third port. The pilot valve has a first position connecting the first port with the second port and a second position connecting the first port with the third port.

Pilot-pressure-controlled flow valve and fluid system containing same

A heat exchanger includes a stack of heat exchanger plate pairs that each define an internal volume and include an inlet and an outlet such that a first medium flows from the inlet to the outlet along a flow axis. The inlets together form an inlet header through the heat exchanger plate pairs and the outlets together form an outlet header through the heat exchanger plate pairs. The heat exchanger also includes an array of fins disposed between and in thermal contact with adjacent heat exchanger plate pairs. The array of fins defines flow channels between the adjacent heat exchanger plate pairs such that a second medium flows through the flow channels along the flow axis. One end of the array of fins includes a cut-out area which causes a first portion of the array of fins to be positioned laterally from either the inlet header or the outlet header.

Heat exchanger

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.

System and method of providing quick thermal comfort with reduced energy by using directed spot conditioning

An internal heat exchanger assembly for an air conditioning system, having a substantial cylindrical cavity in which a helical coil tube is coaxially disposed within the cylindrical cavity. A bleed valve assembly is incorporated into the helical coiled tube, in which the bleed valve assembly is adapted to open at a predetermined differential pressure between the high pressure side and low pressure side of the internal heat exchanger. The bleed valve selectively bleeds refrigerant from the high pressure side to the low pressure side, thereby increasing the pressure and mass flow rate of the refrigerant to the suction side of a compressor.

Internal heat exchanger assembly having an internal bleed valve assembly

An exhaust gas heat recovery (EGHR) heat exchanger, for recovering waste heat from the hot exhaust gases of an internal combustion engine, having a housing and a cylindrical body disposed within the housing. The cylindrical body defines a central passageway and together with the housing defines an annular passageway for the flow of hot exhaust gases. A bypass means is disposed within the central passageway and adapted to selectively by-pass at least a portion of the exhaust gas from the central passageway to the annular passageway. The EGHR heat exchanger also includes at least one fluid tube extending along a tube axis and having at least one lobe extending the length of the tube thereby defining a lobed tube. The lobed tube is twisted about the tube axis forming a twisted lobed tube which is then coiled about the longitudinal axis within the annular exhaust gas passageway.

Exhaust gas heat recovery heat exchanger having a lobed tube coil

A vehicle air conditioner system having, and method of operating, an externally controlled variable displacement compressor and a compressor clutch. If the system is operating during conditions when the operating displacement is low, the efficiency of the system is increased by duty cycling the clutch. Operating an externally controlled variable displacement compressor in this manner can also prevent overcooling by the air conditioner.

Air conditioner system having an externally controlled variable displacement compressor and a clutch and method of operating the same

A heat exchanger assembly includes a pair of outer headers each defining an outer cavity and a pair of inner headers each defining an inner cavity. Each inner header is disposed in one of the outer headers, and each header defines a plurality of header slots. A plurality of first fluid tubes extend between the outer headers from one of the header slots of each outer header to fluidly interconnect the outer cavities defined by the outer headers and a plurality of second fluid tubes are interleaved with the first refrigerant tubes and extend between the outer headers and through one of the header slots of each outer header and through the associated outer cavities defined by the outer headers and to the one of the header slots of each inner header to fluidly interconnect the inner cavities defined by the inner headers.

High performance three-fluid vehicle heater

A control methodology for dynamically adjusting the switching limits of a cycled refrigerant compressor in an air conditioning system with the objective of achieving an optimal or specified tradeoff between compressor cycling frequency and discharge air temperature variation under all operating conditions. In a first embodiment, the compressor cycling limits are controlled to maintain a virtually constant discharge air temperature variation for all operating conditions. In a second embodiment, the compressor cycling limits are controlled so that the discharge air temperature variation changes in relation to the discharge air temperature to provide a virtually constant human comfort level for the occupants. And in a third embodiment, the compressor cycling limits are controlled so that the discharge air temperature variation changes in relation to the ambient or outside air temperature to provide a virtually constant human comfort level for the occupants.

Compressor cycle control method for a vehicle air conditioning system

A method of operating a directed relief valve to ventilate a refrigerant by sensing the concentration of refrigerant leakage from the air conditioning system, and if the first concentration exceeds a threshold, by sensing a second concentration. If the first and second concentrations exceed a predetermined concentration, the system will send a leak message to the operator and/or ventilate the refrigerant to the surrounding atmosphere. The system continuously monitors the refrigerant leakage concentration when the vehicle engine is operative, but only periodically monitors the refrigerant leakage concentration when the vehicle engine is inoperative.

Operating algorithm for refrigerant safety system

A method of venting a refrigerant from an air conditioning system of a vehicle during a crash to mitigate leakage of the refrigerant into a cabin of the vehicle by crashing a test vehicle under a first set of predetermined conditions a number of crash events and measuring deceleration and determining the existence of leakage. The number of crash events in which leakage existed is divided by the number of crash events to establish a probability of leakage ratio. The test vehicle is crashed under a second set of predetermined conditions to determine a second probability of leakage ratio. A probability of leakage relationship is established correlating the probability of leakage ratios and the predetermined conditions. A deceleration relationship is established correlating the deceleration measurements and the predetermined conditions. A deceleration of the vehicle is sensed to determine a probability of leakage from the probability of leakage relationship and the refrigerant is vented in response to the probability of leakage exceeding a predetermined threshold.

Algorithm for activation of directed relief system from vehicle accelerometers during crash

A method of operating a directed relief valve () for an air conditioning system () preferably for a vehicle. The air conditioning system () includes a compressor (), a condenser (), an expansion device (), and an evaporator connected to one another by refrigerant lines. The system () also includes the directed relief valve (), which is disposed inline with at least one of the refrigerant lines to ventilate the refrigerant. The directed relief valve () includes a detonable squib () that explodes in response to a ventilation signal. A controller () generates the ventilation signal in response to a refrigerant leak being detected by a sensor (). The sensor () is preferably located within an air space () and adjacent to the evaporator (). If there is a malfunction of one of a plurality of sensors (), a partial malfunction message is sent to the operator. If all of the sensors () malfunction, the controller () also generates the ventilation signal and sends a complete malfunction message to the operator. Predetermined amounts of time may be used between detection and leak signal, leak signal and ventilation signal, and leak signal and message to the operator.

Method of operating a directed relief valve in an air conditioning system

In one exemplary embodiment, an integrated structural HVAC system (ISHS) includes an ISHS first section and an ISHS second section which are secured to one another to form the ISHS. In one embodiment, the ISHS first section includes a molded first cross beam which includes integral molded features and the ISHS second section likewise comprises a molded second cross beam having integral molded features. The first cross beam includes a number of vent openings formed therein and the second cross beam includes a plurality of fluid ducts formed therein. The first cross beam and second cross beam mate with each other and are securely attached to one another to form the ISHS. In a preferred embodiment, the fluid ducts provide both cockpit/instrument panel structure as well as fluid channels for directing air to desired locations within a vehicle compartment or the like.

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Clarence Center, NY, United States of America

Mark James Zima