Abstract: A control system is provided for a supercharged diesel engine to control engine air inflow in response to an operator-selected fuel flow and in accordance with a predetermined air-fuel ratio schedule chosen for minimizing undesirable exhaust emissions throughout a broad range of engine operating conditions. The control system includes a force-biased relief valve for adjusting engine air inflow, wherein the relief valve is movably responsive to the pressure of air supplied to the engine and the force-bias is controlled in accordance with engine fuel flow.

Abstract: A plate-fin heat exchanger is provided with inlet and outlet headers mounted integrally with the heat exchanger core wherein each header includes a fluid fitting adapted for alignment in an individually selected direction.

Abstract: A control arrangement is provided for controlling the operation of an hydraulic assist turbocharger of the type including an hydraulic turbine driven by an hydraulic fluid under pressure to supplementally drive a turbocharger during engine operating conditions when supplemental air flow is required. The control arrangement includes a dual function control valve responsive to engine speed and load to regulate the supply of hydraulic fluid to the hydraulic turbine in accordance with engine air flow requirements.

Abstract: A system for remote measurement of structural forces includes a plurality of microbend transducers mounted along the length of the structure for microbending an optical fiber in response to structural forces, such as stress acting upon an oil or gas pipeline or the like. An optical time domain reflectometer (OTDR) has a light source for launching a pulsed optical signal for passage through the fiber and a photodetector for sensing as a function of time the intensity of backscattered light reflected back through the fiber, wherein this sensed time function is correlated directly with discrete longitudinal positions along the length of the fiber and the structure. When one or more of the microbend transducers is activated to induce a microbend in the fiber in response to localized forces acting upon the structure, a portion of the backscattered light is lost at the microbend. This attenuation in backscattered light intensity is sensed quantitatively and positionally identified by the photodetector.

Abstract: A plate and fin type heat exchanger is provided with an improved mounting arrangement for mounting the heat exchanger, for example, within the intake manifold of a combustion engine for use as a charge air cooler. A plurality of threaded nuts are secured as by welding at predetermined points at the inboard sides of the heat exchanger side plates for receiving bolts passed through aligned bolt-receiving holes in the intake manifold and side plates to secure the heat exchanger in place, thereby providing a mounting arrangement permitting the heat exchanger to occupy substantially the entire cross-sectional area of the intake manifold for optimized heat transfer capacity.

Abstract: A combustor system for use with a turbocharged combustion engine comprises a combustor connected for continuous passage of engine exhaust gases. The combustor includes a relatively low pressure fuel injection system for atomizing fuel for combustion in a substantially vitiated atmosphere, and a fuel control system for supplying fuel to the combustor in response to engine operating conditions.

Abstract: A turbine housing assembly for use in a turbocharger having an exhaust gas driven turbine wheel for rotatably driving a compressor impeller. The assembly includes a turbine housing having an exducer passage into which exhaust gases are discharged from the turbine wheel. A bypass passage in the turbine housing and a pivoting wastegate valve cooperate to provide an efficient exhaust ejector for drawing gases through the exducer passage to reduce back-pressure on the engine. The turbine housing further includes an air vent for circulation of cooling air between the bypass and exducer passages.

Abstract: A system for remote measurement of structural forces includes a plurality of microbend transducers mounted along the length of the structure for microbending an optical fiber in response to structural forces, such as stress acting upon an oil or gas pipeline or the like. An optical time domain reflectometer (OTDR) has a light source for launching a pulsed optical signal for passage through the fiber and a photodetector for sensing as a function of time the intensity of backscattered light reflected back through the fiber, wherein this sensed time function is correlated directly with discrete longitudinal positions along the length of the fiber and the structure. When one or more of the microband transducers is activated to induce a microbend in the fiber in response to localized forces acting upon the structure, a portion of the backscattered light is lost at the microbend. This attenuation in backscattered light intensity is sensed quantitatively and positionally identified by the photodetector.

Abstract: A system for remote measurement of structural forces includes a plurality of microbend transducers mounted along the length of the structure for microbending an optical fiber in response to structural forces, such as stress acting upon an oil or gas pipeline or the like. An optical time domain reflectometer (OTDR) has a light source for launching a pulsed optical signal for passage through the fiber and a photodetector for sensing as a function of time the intensity of backscattered light reflected back through the fiber, wherein this sensed time function is correlated directly with discrete longitudinal positions along the length of the fiber and the structure. When one or more of the microbend transducers is activated to induce a microbend in the fiber in response to localized forces acting upon the structure, a portion of the backscattered light is lost at the microbend. This attenuation in backscattered light intensity is sensed quantitatively and positionally identified by the photodetector.

Abstract: Apparatus and method for filling and sealing selected holes in a circuit board with epoxy resin or the like. The board is sandwiched in series between sealing sheets of a thermoplastic material and barrier sheets of a glass fiber or the like to form a laminate stack through which the holes are drilled at selected locations. The stack is disassembled and the board is plated to coat the linings of the drilled holes therein with conductive material, followed by reassembly of the stack together with an overlying resin-carrying sheet such as a glass fiber coated and/or impregnated with epoxy resin. The stack and the resin-carrying sheet are subjected to heat and pressure for causing the sealing sheets to adhere to the board and then for melting the epoxy resin and for forcing it to flow into the holes in the circuit board. After the epoxy resin is cured, the various sheets are stripped from the board leaving the epoxy resin within the holes.

Abstract: A control arrangement is provided for controlling the operation of an hydraulic assist turbocharger of the type including an hydraulic turbine driven by an hydraulic fluid under pressure to supplementally drive a turbocharger during engine operating conditions when supplemental air flow is required. The control arrangement includes a dual function control valve responsive to engine speed and load to regulate the supply of hydraulic fluid to the hydraulic turbine in accordance with engine air flow requirements.

Abstract: A charge air cooler is provided for mounting within the intake manifold of a combustion engine. The charge air cooler comprises a heat exchanger core formed by a plurality of relatively lightweight heat transfer elements defining a first flow path for charge air prior to ingestion of the charge air by the engine and a second flow path for a coolant in heat transfer relation with the charge air. The heat exchanger core supports at least one transversely extending rigid mounting sleeve for receiving a mounting bolt passed through a bolt-receiving hole in the intake manifold to secure the charge air cooler within the intake manifold.

Abstract: A bearing for supporting a turbocharger shaft comprises a one-piece cylindrical bearing sleeve for rotational floating between a turbocharger housing and shaft. The bearing includes an inner diameter configured to define a plurality of axially extending arcuate lands formed on a common radius and separated by oil-receiving recesses.

Abstract: A control actuator for a turbocharger comprises an actuator rod coupled within an actuator housing to a pressure responsive diaphragm biased by a spring, and projecting out of the housing for connection to a turbocharger wastegate valve. A seal assembly on the rod accommodates sealed axial rod displacement, and includes a spherical seat maintained by a second spring in relatively low pressure pivotally sealing relation with the housing.

Abstract: A control system is provided for controlling a turbocharger in a turbocharged engine in response to engine power setting when the engine is operated at a power level above a selected minimum or relatively low power level and in response to altitude when the engine is operated at the low power level. A primary controller controls the position of a waste gate valve to control turbocharger compressor discharge pressure in response to engine throttle setting when the engine is operated above the low power level, and a pair of secondary controllers control the position of the valve in response to altitude when the engine is operated at the low power level to control the compressor discharge pressure in a selected manner up to a predetermined altitude and to vary the discharge pressure as a selected function of altitude above the predetermined altitude.

Abstract: A control actuator for a turbocharger comprises a pressure responsive diaphragm for controlling operation of a turbocharger waste gate valve in response to compressor inlet pressure during part load engine operation, and in response to tubine inlet pressure during full load engine operation.

Abstract: An engine cooling system comprises an integrated arrangement for pumping liquid coolant with a single pump through an engine and into heat exchange relation with various auxiliary heat loads in a combustion engine system. The coolant is further circulated by the pump from the engine and the various auxiliary heat loads to a single dissipation heat exchanger for dissipation of the absorbed heat energy. The cooling system is designed for maintenance of the engine and the auxiliary heat loads at individually selected operating temperature levels.

Abstract: A combustor system for use with a turbocharged combustion engine comprises a combustor connected for continuous passage of engine exhaust gases. The combustor system includes a relatively low pressure fuel injection system for atomizing fuel for combustion in a substantially vitiated atmosphere, a fuel control system for supplying fuel to the combustor in response to engine operating conditions, and a heat exchanger for preheating compressed bypass air prior to supply thereof to the combustor.

Abstract: A crossover duct for providing flow communication between multiple stages of centrifugal compressors and the like. The duct forms a continuous annular path between compressor stages for turning radially outward gas flow to a radially inward direction. The duct includes thin diffuser vanes having aerodynamically contoured leading edges, and a vaneless turning bend having a generally elliptical wall geometry.

Abstract: A shaft seal arrangement for turbochargers comprises a two piece wear washer for preventing passage of bearing lubricant into the turbocharger turbine housing. The two pieces of the wear washer seal respectively with the turbocharger shaft and with the turbocharger bearing housing. The two pieces of the wear washer further cooperate with each other to form a radially displaceable seal arrangement to accommodate radial excursions of the shaft without leakage of bearing lubricant.