Honeywell International Inc.

Alliedsignal Inc.

Richard Paul Beldam

Keith Agee

Roland L Dilley, Jr

Roland Dilley

Steven M Ayres

Carl E Kiser

William L Klein

Roland L Dilley

Apparatus and method for cooling heated fluids, such as exhaust gases, flowing through a heat exchanger comprising one or more exhaust plenums and one or more coolant plenums, and providing increased coolant velocity in that portion of the coolant plenums contacting the inlet portion of the exhaust plenums. Local increased coolant velocity is provided by any means, including decreasing the area-in-flow of the coolant plenums wherein increased velocity is desired, shaping or baffling either or both inlet or outlet coolant tanks in fluidic contact with coolant plenums wherein increased velocity is desired, or a combination thereof.

Heat exchanger

A cooling system comprises a cooler with a hot-side passage extending between hot-side inlet and outlets. The cooler further includes a cooling passage extending between cold-side inlet and outlets. A cooling medium is disposed within the cooling passage, and is in contact with the hot-side passage to reduce the temperature of the gas or liquid passing through the hot-side passage. The cooling system is configured to regulate the condition of the cooling medium within the cooler to reduce/eliminate unwanted boiling of the cooling medium being within the cooler. The cooling system can include controller that provides an output signal in response to a detected condition of the cooling medium, and a device that receives the output signal and changes the operation of the cooling system and/or operation of an internal combustion engine to reduce the occurrence of unwanted cooling medium boiling within the cooler.

Cooling system with boiling prevention

An exemplary heat exchanger includes a heat exchanger core having a core side fluid space and a cover plate and a substantially U-shaped wall fitted at one end with an inlet header and, at an opposing end, with an outlet header, which in combination with the cover plate, define a shell side fluid space. In this example, the cover plate forms two seals with two opposing sides of the U-shaped wall, forms a seal with the inlet header and forms a seal with the outlet header. Such a heat exchange may be suitable for use as an EGR cooler. Other exemplary devices, methods and systems are disclosed.

A charge air cooler with an integral precooler is disclosed which cools charge air by using both liquid coolant and air coolant. The charge air path is not affected by the use of the liquid coolant. The charge air cooler disclosed can cool particularly hot charge air without a significant drop in pressure.

Charge air cooler

Heat exchangers of this invention include a shell having an inner chamber defined by an inside wall surface, and having at least one opening adjacent an end of the shell. A tube bundle comprising a plurality of assembled together tubes are disposed within the inner chamber. A header plate is attached to the tubes and is positioned adjacent an end of the tube bundle. The header plate includes an outside diameter that fits within the shell inside wall surface to provide a nested attachment junction therebetween. The header plate and shell are fixedly connected to one another by use of a braze joint formed by the placement of brazing material between the interfacing header plate and the shell surface sections. A tank is attached to the shell adjacent the shell end.

Nested attachment junction for heat exchanger

An exemplary heat exchanger, suitable for use in exhaust gas recirculation to cool exhaust gas, includes a cover plate having a plurality of openings, an upper plate having a plurality of openings, a lower plate having a plurality of openings and a bottom plate where seals exist between various plates to form at least one gas flow space and at least one liquid flow space. Various other exemplary heat exchanger configurations are also disclosed.

Heat exchangers, constructed in accordance with principles of this invention, comprise a plurality of first passages, for transporting a first fluid or gas therethrough, and one or more second passages for transporting a second fluid or gas therethrough. The second passages are positioned adjacent to the first passages to permit a desired transfer of thermal energy from the first passages to the second passages. At least one manifold is placed in communication with one of the first or second passages. The manifold includes an opening disposed therethrough for receiving or dispensing the first or second fluid or gas to or from the first or second passages. The heat exchanger includes a flow director disposed therein for diverting or distributing the flow of first or second fluid or gas in a manner different from a natural fluid or gas flow within the heat exchanger. The flow director can be provided as an integral part of the heat exchanger itself, or can be provided as a separate element within the heat exchanger.

Heat exchanger with flow director

An apparatus and method for cooling hot fluids, especially exhaust gases, with a multi-pass cooler core. The cooler core is particularly useful for cooling exhaust gases flowing in an exhaust gas recirculation (EGR) system or regime in operative association with an internal combustion engine, such as a diesel engine. Cooled gases are recirculated to the engine input to help reduce noxious exhaust emissions. The invention utilizes unequal areas-in-flow between the first exhaust pass through the core and the second and subsequent passes through the core. The first pass through the core features an area-in-flow comparatively larger than the area-in-flow of the second pass. The difference in areas-in-flow between passes influences gas velocities to reduce fouling, despite changes in exhaust gas temperature between passes through the core.

Method for making a multi-pass exhaust gas recirculation cooler

Heat exchanger header tanks are constructed from a basic set of components. The basic components are castings and simple formed sheet parts. The components are assembled to produce a heat exchanger tank having a desired size and geometry.

Method and apparatus for flexible construction of heat exchanger tanks

Multi-pass exhaust gas recirculation cooler

A side sheet of a radiator has a thermal expansion joint to allow thermal relief in the radiator as the radiator expands due to temperature variations during operation. The thermal expansion joint is formed by first brazing the side sheet to the radiator core and then cutting through the side sheet.

Radiator thermal expansion joint and method for making the same

A heat exchanger for use in connection with engine cooling systems is disclosed herein. The heat exchanger is typically considered a heat exchanger and comprises a plurality of rows of tubes, a pair of headers secured to the ends of the tubes in a mechanical and brazed joint for providing improved vibration and torsional stress resistance and improved durability. More specifically, the tube include a plurality of dimples or tabulators arranged in opposed or non opposed relation agitate the fluid about the primary heat transfer axis to facilitate heat transfer from the hot fluid to the tube wall.

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Torrance, CA, United States of America

Richard Paul Beldam