Gm Global Technolgoy Operations, Inc.

David B Quinn

Richard W Duce

Kathryn Mary McCauley

Mark Ray McClanahan

Frederick L Kennard

Bruce R Dinger

Disclosed is an exhaust oxygen sensor including a component requiring electricity to operate such as a heater or oxygen electrode. The first electrical terminal is provided in electrical contact with the component and wherein the electrical terminal has at least one male prong. The second electrical terminal in electrical contact with a wire for delivering electrical power from an external source is also provided. The second electrical terminal has at least one female connector or receptacle. The male prong and the female connector are constructed and arranged so at least one of the first and second electrical terminals is removable with respect to the other terminal. The sensor may include a threaded nut slidably received over a tubular housing, constructed and arranged to be threaded onto a threaded exhaust manifold boss without rotating the housing.

Exhaust sensor with removable electrical connector

An exhaust sensor having a substrate including first and second portions, the first portion comprising a dielectric material, the second portion comprising an electrolyte material and a transition zone interposed between the first and second portions. The transition zone includes an increasing concentration of the dielectric material in the direction of the first portion of the substrate and an increasing concentration of the electrolyte material in a direction towards the second portion of the substrate. The invention also includes a method of making such an exhaust sensor substrate including the steps of co-depositing first and second amenable compositions, the first composition comprising a dielectric material and the second composition comprising an electrolyte material. The co-deposited compositions are fired together to form the substrate having first, second and transition portions as described above. The two compositions may be co-deposited as a slurry and spread over a substrate using a partition doctor blade to form a very thin tape of a dielectric material and an electrolyte material. The two compositions may be co-deposited by feeding the compositions side by side through a compaction press to form a single tape having a first dielectric portion and a second electrolyte portion.

Exhaust sensor including a composite tile sensing element and methods of

A spark plug grinding machine is equipped with force sensors to measure grinding forces and other forces attendant to a grinding operation. Ceramic spark plug insulators are carried by spindles on a Ferris wheel into a grinding station. A control wheel engages and spins each part as a grinding wheel grinds the surface of the insulator. A three axis transducer on one of the spindles measures force components along the axis of the spindle, parallel to a tangent of the grinding wheel and in a radial direction. A torque sensor on the control wheel measures the torque as the wheel rotates each insulator. Either or both of the sensors may be used. They are coupled through slip rings to a recorder.

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Grand Blanc, MI, United States of America

David B Quinn