Denso International America, Inc.

Richard Hankins

Edward Szczepanski

Zhe Huang

Michael Lewis

Rafal Kaput

Masayuki Kobayashi

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.

Particulate matter sensor

An air/fuel imbalance detection module includes a fueling control module, a response time determination module, and a comparison module. The fueling control module commands a fueling change according to a predetermined fueling pattern. The response time determination module determines a measured response time for a wide-range air/fuel sensor (WRAF) to output a predetermined voltage. The comparison module compares the measured response time with a reference time range and diagnoses air/fuel imbalance when the measured response time is outside the reference time range.

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Brighton, MI, United States of America

Richard Hankins