Abstract: A low speed high pressure ration turbocharger incorporates a compressor impeller having impeller blades for a first stage of compression mounted on a first side of the wheel and impeller blades for a second stage of compression mounted on a second side of the wheel. Driving the dual sided compressor impeller on a common shaft from the turbine wheel allows reduction in rotational speeds while increasing compression ratio of the turbine. The scroll inlet and outlet volute for the second stage inducer are integrated with the compressor housing or other portions of the turbocharger case for compact packaging.

Abstract: A turbocharger with integrated Exhaust Gas Recirculation (EGR) employs an EGR pump impeller mounted on a common shaft with the turbocharger compressor and turbine. The EGR pump is housed within an EGR extension in the bearing housing adjacent the compressor housing backplate. The recirculation extension includes an exhaust gas outlet for the pumped EGR and an exhaust gas inlet is incorporated in the backplate adjacent the EGR pump impeller.

Abstract: A system and method is provided for heating the LCD display of an electronic device and especially a small electronic device as for example a laptop computer. The system consists of a heat spreader plate attached to a back surface of the LCD. A heat absorption plate is used to absorb heat generated by the electronic components of the electronic device. A heat transfer conduit is used to transfer the heat from the heat absorption plate to the heat spreader plate where the heat is dissipated to the LCD display. The method requires the absorption of heat generated by the electronic device and the transfer of such heat to the LCD display.

Abstract: A turbocharger with an integral exhaust gas recirculation (EGR) chamber incorporated into the turbine housing attaches to an exhaust outlet casting having a segregated EGR chamber. A valve in the turbine housing EGR chamber allows recirculation of exhaust gas directly from the turbine volute.

Abstract: A method for mounting a cooling assembly for use in a motor vehicle, with the cooling system including a radiator assembly, a charge air cooler, and a condenser. The radiator assembly is mounted to a chassis of the motor vehicle, the charge air cooler is mounted to the radiator assembly, and the condenser is mounted to the charge air cooler so as to dispose the radiator assembly, charge air cooler and condenser in series flow relationship with one another. The radiator assembly includes a frame having two generally U-shaped portions, and a radiator, or heat exchanger, disposed within and mounted to the frame. A first lateral end portion of the radiator is rigidly attached to one of the U-shaped portions of the frame. The opposite lateral end portion of the radiator is resiliently mounted to the other U-shaped portion of the frame, which is accomplished by coupling a pair of leaf springs to the radiator and the frame.

Abstract: A control valve for an EGR system employs a variable pressure actuator connected to a valve for metering EGR flow and a differential pressure valve connected to supply actuation pressure to the actuator. The differential pressure valve incorporates a proportional solenoid connected to a pressure balancing piston which receives EGR pressure on one side and exhaust flow pressure on the other. The piston is connected to a shaft having an orifice positionable adjacent a pressure source in a first position and a pressure vent in a second position, an outlet of the orifice communicating with the pressure actuator. EGR control is accomplished by providing a signal to the proportional solenoid which shifts the pressure balance point for the piston.

Abstract: An integrated bearing system with journal and thrust bearings is incorporated in a single unit centrally pinned to the bearing housing and having integral thrust surface and journal surface lubrication grooves in combination with turbine and compressor wheel thrust surfaces. The bearing employs a first aperture substantially equidistant from the ends to engage the locating pin to prevent rotation of the bearing within the bearing case bore, while allowing the bearing to be free to symmetrically wobble within the bearing case bore.

Abstract: A turbocharger is provided with an integral exhaust gas recirculation (EGR) chamber and valve contained within the turbine housing casting in conjunction with a conventional exhaust gas bypass or wastegate system. An exhaust gas back pressure control valve is also provided integral to the exhaust gas outlet for EGR flow control.

Abstract: An improved wastegate valve for turbochargers having bifurcated exhaust gas inlets includes a first bypass port communicating with a first portion of the exhaust inlet, a first poppet which engages and seals a seat surrounding the first port, a second bypass port communicating with a second portion of an exhaust inlet, and a second poppet which engages and seals a seat surrounding the second port. Actuation of the poppets is accomplished by a first substantially tubular shaft supported for rotation about an axis and having a central bore and a second substantially tubular shaft extending through the central bore of the first shaft and supported therein for rotation about the axis. The two shafts are concurrently rotated by a lever arm which is connected to the first shaft, at an opposite end to the radial arm, with a weld bead which extends across the end face of the first shaft, the bore, and a coplanar end of the second shaft.

Abstract: Efficient Exhaust Gas Recirculation (EGR) for use with internal combustion engines is provided by a system including a fluidic pump, such as a Coanda effect pump. The fluidic pump has a primary air inlet receiving pressurized air from a source such as the pressure tank of a truck air brake system which operates at a pressure sufficient to provide high energy air. The pumped fluid inlet is connected to the exhaust gas manifold to receive the exhaust gas for recirculation and the outlet of the fluidic pump is connected to the inlet manifold of the engine downstream of the charge air boosting system.

Abstract: A turbocharger with a variable turbine nozzle having a plurality of vanes provides reduced actuation forces by pressure balancing the vane support axles. A nozzle ring and insert ring are secured in substantially rigid spaced relation by a series of hollow spacers and bolts to position the vanes between the nozzle inlet from the volute and nozzle outlet adjacent the turbine. A chamber intermediate the turbine housing and the center housing of the turbocharger accommodates the actuation mechanism for the nozzle vanes and through communication with the nozzle inlet from the volute by the tolerances between the nozzle ring and various elements of the actuation linkage transmits exhaust gas pressure to impinge on an end of the first axle for each vane. Balancing exhaust gas pressure is transmitted through channels between the turbine housing and insert ring, which extend from the nozzle inlet to the apertures receiving the second axles, to impinge on an end of the second axle for each vane.

Abstract: An Exhaust Gas Recirculation system for an internal combustion engine incorporates a turbocharger having a compressor rotor with two sets of vanes on opposite sides of the rotor disk for compression of charge air and recirculated exhaust gas. The charge air and recirculated exhaust gas streams are segregated in the turbocharger and an inlet and an outlet volute for the recirculated exhaust gas is integral with the turbocharger center housing. A mixer receives the charge air downstream of the charge air cooler and mixes the recirculated exhaust gas for input into the intake manifold. A variable valve intermediate the exhaust manifold of the engine and the inlet of the turbocharger EGR inlet volute controls the amount of recirculation.

Abstract: A pressure balanced turbocharger rotating seal is provided by two piston rings mounted on the shaft of the turbocharger, one of the rings engaging a circumferential surface of the shaft bore in the center housing and the second ring engaging a circumferential surface of the shaft bore in the turbine wheel shroud, with a passage for introducing pressurizing gas intermediate the two rings, the passage including a circumferential channel in the inner face of the turbine wheel shroud, and a compression seal engaged between the center housing and turbine wheel shroud outboard of the channel.

Abstract: A heat exchanger includes one or more parts composed of a braze clad aluminum alloy having a composition defined essentially by the formula: Al 1.1% Mn 1.1% Mg 0.15 Cu and being brazed to other aluminum parts. The heat exchanger exhibits usable strength at operating temperatures ranging up to 232.degree. C. ?450.degree. F!, and is especially suited for use in the charge air cooler of a diesel engine.

Abstract: In heat exchanger such as an automotive radiator, an improved tank to header joint is provided. The header and tank can be provided hooks shaped portion and cooperating tabs that are assembled in an interlaced and locked together by a pin inserted therebetween. An elastomeric seal is can be disposed between the opposed surfaces of the tank and header.

Abstract: A boosted charge air system which eliminates adverse effects of pressure loading on the system components incorporates a pressure compensator mounted intermediate a turbocharger compressor section outlet duct and the inlet duct of a charge air cooler. The compensator includes first and second end bellows each with a first cross sectional area, a middle bellows intermediate the first and second end bellows with an annular cross sectional area substantially equal to the first cross sectional area, first and second end flanges connecting the first and second end bellows to the outlet duct and inlet duct, respectively, and first and second annular plates connecting the middle bellows to the first and second end bellows. An internal restraining structure for the compensator includes two sets of struts interconnecting the first end flange to the second annular plate and the second end flange to the first annular plate.

Abstract: A calcia mold facecoat is applied to a mold for casting parts composed of reactive metals such as titanium and titanium aluminide. The facecoat is composed of a calcium carbonate based slurry comprising a dense grain calcium carbonate powder and an aqueous based binder. It is applied to a wax or plastic pattern used in the lost wax process for fabricating a casting shell. The mold is built using multiple dipping of alumina-silicate slurries, and then fired at high temperatures in an oxygen rich environment. The metal part is cast before the fired mold can cool below about 800.degree. C. Organometallic based slurry binders are avoided and significant cost savings are realized owing to the benign nature of the aqueous based suspensions with respect to the environment.

Abstract: 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.

Abstract: A turbocharger has a drive-shaft mounted in bearing means in a housing. The drive shaft drivably connects an exhaust gas driven turbine wheel to the impeller of an air compressor 22. A gas flow control device, such as a wastegate 10, 39 and/or a variable geometry turbine inlet nozzle, positioned upstream of the turbine wheel is operable to adjust the operating performance of the turbocharger. An electrically drivable actuator motor 17, 45, such as a D.C. motor or a stepper motor, is provided for regulating the operation of the gas flow control device via a linkage means 14, 15, 405, 407, 406, 825, 830, 835 in response to an electrical signal dependent at least upon the delivery pressure of the compressor. In a preferred arrangement the linkage means includes a relatively rotatable threaded lead screw 15 and a correspondingly threaded female screw member 14 threadably engaged therewith.