Eaton Corporation

Cooper Technologies Company

John Albert Kovacich

John Trublowski

Wayne Scott Kaboord

Fred Joseph Begale

Christopher C Hoinsky

James Edward McCarthy, Jr

Dale Arden Stretch

Mark Allan Juds

James E Hansen

Douglas John Nielsen

Birger Pahl

Steven Christopher Schmalz

Paul Newcomb Stoving

Donald R Haefner

Lawrence J Ryczek

Karen Evelyn Bevan

Martin Pryor

Steven Mitchell Kuznicki

Bruce M Hatton

Ross Stuart Daharsh

Xubin Song

David Yee

Rose Ellen Weisburgh

Lisa Carol Sletson

Donald M Stout

Robert Raymond Schuetz

Donald G Williams

Arlene M Klumb

Christopher Randall Hastreiter

Peter D Van Vessem

Carl Anderson

Ricardo A Rago

Robert A Schiesser

Evan Grimm

Dawn Marie Becher

Daniel Woodrow Fellers

Robert R Brzycki

An apparatus for measuring at least one of temperature and pressure within a cylinder of an internal combustion engine can include an engine valve and a sensor. The internal combustion engine can include a valvetrain having rocker arm assembly, a camshaft, a valve, and a hydraulic lash adjuster. The engine valve can have a valve head and a valve stem extending from the valve head in an axial direction. The valve head can have a valve face configured to be in pressure communication with an engine cylinder. The valve stem can have an outer surface with a cylindrical portion and a variably-shaped portion. The variably-shaped portion can define a target detectable by the sensor and the sensor can be installed adjacent to the target. Alternatively, the sensor can be positioned to detect a level of force at some point along the valvetrain.

Detection apparatus for at least one of temperature and pressure in a cylinder of an internal combustion engine

Techniques for detecting vacuum loss in a vacuum interrupter are disclosed. For example, a sensing system of a vacuum interrupter includes a sensor including a material that oxidizes in the presence of air and is at least partially positioned in an evacuated space of a vacuum interrupter, the sensor being configured to produce an indication of impedance of the material; and a control system coupled to the sensor, the control system including an electronic processor and an electronic storage that stores instructions that, when executed, cause the electronic processor to access an indication of impedance produced by the sensor, determine a measure of impedance of the material of the sensor based on the accessed indication of impedance, and determine a condition of the evacuated space based on the determined measure of impedance.

Vacuum loss detection

A force sensor can include a magnetic field generator, a magnetic flux return, and a magneto-elastic layer. The magnetic flux return can extend along a first portion of at least one pathway of magnetic flux generated by the magnetic field generator. The magneto-elastic layer can be operable to be in contact with a surface subjected to force and thereby strained. The magneto-elastic layer can extend along a second portion of the at least one pathway of magnetic flux distinct from the first portion.

In-cylinder pressure measurement utilizing a magneto-elastic element for measuring a force exerted on an engine valve assembly

An apparatus is for visual indication of an energized state of electrical conductors. The apparatus includes two electrodes structured to capacitively couple to two energized electrical conductors, respectively, in order to harvest an electric field. A rectifier is powered from one or both of the two electrodes. An illuminated indicator or a non-illuminated indicator is powered from the rectifier.

Apparatus including electrodes, a rectifier or circuit, and an illuminated or non-illuminated indicator for visual indication of energized electrical conductors

A power system for an alternating current power bus includes an electret operatively associated with the alternating current power bus. The electret includes an output having an alternating current voltage when the alternating current power bus is energized. A rectifier includes an input electrically interconnected with the output of the electret and an output having a direct current voltage responsive to the alternating current voltage of the output of the electret. A powered device includes an input electrically interconnected with the output of the rectifier. The powered device is powered responsive to the direct current voltage of the output of the rectifier.

Power system including an electret for a power bus

An indicator system for an alternating current power bus includes an electret operatively associated with the alternating current power bus. The electret includes an output having an alternating current voltage when the alternating current power bus is energized. A rectifier includes an input electrically interconnected with the output of the electret and an output having a direct current voltage responsive to the alternating current voltage of the output of the electret. An indicator includes an input electrically interconnected with the output of the rectifier and an indication output responsive to the direct current voltage of the output of the rectifier.

System including an indicator responsive to an electret for a power bus

The invention relates to systems for removing NOx from exhaust. In one aspect of the invention, after adsorption, an NOx adsorber is isolated from the main exhaust flow and desorption induced by raising the temperature. The desorbed NOx is combined with a reductant and reduced over a catalyst. Preferably, the reductant is syn gas produced in an on-board reformer. The catalyst need never be exposed to the main exhaust flow, which is particularly advantageous for catalysts sensitive to water, oxygen, or sulfur. In another aspect of the invention, a recirculating flow is induced through an NOx adsorber during a regeneration cycle. Recirculation can induce greater desorption at a given temperature, provide a source of heat for the adsorber, and allow a higher conversion rate with a fixed amount of catalyst. A further aspect of the invention relates to a vehicle-mounted adsorbers with provisions for heating.

Temperature swing adsorption and selective catalytic reduction NOx removal system

A method of manufacturing a piezoelectric torque transducer is provided, comprising the steps of (a) forming a prepared area on a surface of a torsion member adapted to be strained by an applied torque; (b) providing a piezoelectric element having an axis of maximum strain sensitivity and disposing first and second electrodes on opposite faces of the element, respectively, and attaching an electrical lead to each electrode; (c) connecting electrical leads to the electrodes; and (d) disposing the element on the prepared area and orienting the axis of maximum strain sensitivity on the member and securing the element to the prepared area with a material selected from a group consisting of (i) adhesive material and (ii) potting material. The step of disposing the piezoelectric element includes configuring the piezoelectric element in a plate-shaped configuration and disposing a resilient annular member on each opposite face of the plate-shaped element and overlaying each of the annular members with a protective cover.

Method of manufacturing a piezoelectric torque sensor

A transducer housing for mounting a port in a combustion chamber has a metal diaphragm exposed to the combustion gasses. The pressure of the combustion gasses deflects the diaphragm which locally deflects a simply supported beam. The beam is formed of refractory material having epitaxially grown crystalline piezoresistors formed on one surface of the beam and connected in a bridge circuit. Noble metal foil leads connect to the piezoresistors to form the bridge and provide attachment pads. The pads are noble metal welded to other noble metal foil pads provided on a ceramic substrate to form a sensor subassembly for mounting adjacent the diaphragm to form a transducer.

Combustion chamber pressure transducer and method of making same

A method of making a foil-type electrical resistance strain gage having a gage factor of at least 4. A PtW foil is adhesively bonded to a polyimide substrate with an FEP adhesive cured under heat and pressure. The foil is spin-coated with a positive photoresist, masked, and exposed to ultraviolet light. The exposed photoresist is then developed, permitting wet etching of the foil to form a gage pattern on the substrate, which is then preferably cured.

Method of making high output strain gage

A pressure transducer for measuring high differential pressure media in a harsh environment where a diaphragm assembly is mounted to an intermediate support number which is mounted to a main support member where the high pressure media impinges on the diaphragm to create a force opposing that provided by the diaphragm support structure thereby loading the diaphragm in compression. The strain sensitive piezoresistive elements are protected and sealed from the low pressure media by a passivation layer and electrical signal leads are attached to bonding pads formed on the diaphragm assembly which are sealed to the intermediate support member by a sealing cap.

Diaphragm mounting system for a pressure transducer

A pressure transducer (50) of the type utilizing a diaphragm (8) with strain sensitive elements (14) formed in the diaphragm surface where the strain sensitive elements (14) are connected to an electronics assembly (4) to produce an electrical output in response to deflection of the diaphragm (8). A diaphragm assembly (26) is bonded to an intermediate support member (28) which is in turn bonded to a main support member (32) which is joined to a support collar (42) and hermetically sealed thereto with a sealing glass (40) where each element (2, 28, 32, 42) has a substantially matched coefficient of thermal expansion so as to reduce any induced thermal stresses and resultant measurement errors where the sealing glass (40) and the support collar (42) have a greater coefficient to produce a compressive type seal at high temperature. A pressure fitting (58) is joined to the external fluid pressure to be measured where the fluid is conducted to the diaphragm (8) through a plurality of passageways (30, 34, 56) in the support elements (28, 32, 44). A main housing (48) encloses the pressure sensing assembly (2) and support members (28, 32, 42) thereby providing protection from the environment.

Hermetic mounting system for a pressure transducer

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Waukesha, WI, United States of America

John Albert Kovacich