Denso International America, Inc.

Michael Lewis

Edward Szczepanski

Rafal Kaput

Blaise Friery

Jonathan Logan

Richard Hankins

Masayuki Kobayashi

A sensor probe having a first sensing element and a second sensing element. The first sensing element generates current changes in response to changes in a relative amount of a target element present in reference air versus a first exhaust gas chamber of the sensor probe. A second sensing element generates current changes in response to changes in a relative amount of the target element present in the first exhaust gas chamber and either a second exhaust gas chamber of the sensor probe or reference air.

Multi-element sensors

A vehicle controller is programmed to, in response to a command to perform a diagnostic test, operate an engine under one or more lean conditions and/or operate the engine under one or more rich conditions to determine if a catalytic converter, a pre-catalyst oxygen sensor, and a post-catalyst oxygen sensor within the exhaust system of the engine are functioning properly.

Diagnostic test for engine exhaust system

A particulate matter sensor assembly including a resistance sensor and a resonance sensor. Each one of the resistance sensor and the resonance sensor is configured to measure particulate matter present in engine exhaust.

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Dearborn, MI, United States of America

Michael Lewis