Fca US LLC

Steven C Wante

Roger C Sager

Matthew T Bartlett

Daniel E Hornback

Jeff Brand

Aurora J White

Robert L Roy

A vehicle includes a component coated with a pollutant reduction catalyst configured to remove pollutants from a flow of air over the component, a catalyst temperature sensor coupled to the component, a general temperature sensor, a vehicle speed sensor, and an active grille shutter (AGS) system having a plurality of movable grille shutters. A controller is configured to determine an efficiency of the pollutant reduction catalyst based on signals from the catalyst temperature sensor, the general temperature sensor, the vehicle speed sensor, and the AGS system.

System and method to monitor coated radiator

An engine system includes an internal combustion engine, a main exhaust aftertreatment system with a main catalytic converter, and a light-off catalyst bypass system with a bypass passage and a bypass catalytic converter. An emissions control system includes a controller in signal communication with an oxygen sensor disposed downstream of the bypass catalytic converter. The emissions control system performs a diagnostic of the bypass catalytic converter, by the controller, including (i) monitoring signals from the downstream oxygen sensor for a predetermined time period during an engine cold start condition, (ii) determining a curve plotting oxygen content at the downstream oxygen sensor over the predetermined time period, based on the signals from the downstream oxygen sensor, (iii) determining a number of times the curve crosses a predetermined setpoint over the predetermined time period, and (iv) comparing the number to a predetermined threshold to determine if the bypass catalytic converter has failed.

Vehicle bypass catalyst diagnostic system

An engine system includes an internal combustion engine, a main exhaust aftertreatment system with a main catalytic converter, and a light-off catalyst bypass system with a bypass passage and a bypass catalytic converter. An emissions control system includes a controller in signal communication with an oxygen sensor disposed downstream of the bypass catalytic converter. The emissions control system performs a diagnostic of the bypass catalytic converter, by the controller, including (i) monitoring signals from the downstream oxygen sensor for a predetermined time period during an engine cold start condition, (ii) determining a curve plotting oxygen content at the downstream oxygen sensor over the predetermined time period, based on the signals from the downstream oxygen sensor, (iii) calculating an accumulated area under the curve over the predetermined time period, and (iv) comparing the calculated accumulated area to a predetermined threshold to determine if the bypass catalytic converter has failed.

An engine system includes an internal combustion engine, a main exhaust aftertreatment system with a main catalytic converter, and a light-off catalyst bypass system with a bypass catalytic converter. An emissions control system includes a controller in signal communication with a first oxygen sensor disposed upstream of the bypass catalytic converter, and a second oxygen sensor disposed downstream of the bypass catalytic converter. The emissions control system performs a diagnostic of the bypass catalytic converter, including (i) monitoring signals from the first and second oxygen sensors for a predetermined time period during an engine cold start condition, (ii) determining a signal average of the first oxygen sensor (iii) determining a signal average of the second oxygen sensor, (iv) determining a difference between the signal averages of the first and second oxygen sensors, and (v) comparing the difference to a predetermined threshold to determine if the bypass catalytic converter has failed.

An internal combustion engine system includes an internal combustion engine, a main exhaust aftertreatment system with a main catalytic converter, and a light-off catalyst bypass system with a bypass passage and a bypass catalytic converter. An emissions control system includes a controller in signal communication with a first oxygen sensor disposed upstream of the bypass catalytic converter, and a second oxygen sensor disposed downstream. The emissions control system performs a diagnostic of the bypass catalytic converter, by the controller, including (i) monitoring signals from the first and second oxygen sensors for a predetermined time period during an engine cold start condition, (ii) determining a ratio of oxygen content at the second oxygen to the first oxygen sensor based on the signals from the first and second oxygen sensors, and (iii) comparing the determined ratio to a predetermined threshold ratio to determine if the bypass catalytic converter has failed.

An engine system includes an internal combustion engine, a main exhaust aftertreatment system with a main catalytic converter, and a light-off catalyst bypass system with a bypass passage and a bypass catalytic converter. An emissions control system includes a controller in signal communication with a first temperature sensor disposed upstream of the bypass catalytic converter, and a second temperature sensor disposed downstream of the bypass catalytic converter. The emissions control system performs a diagnostic of the bypass catalytic converter, including (i) monitoring signals from the first and second temperature sensors for a predetermined time period during an engine cold start condition, (ii) determining a temperature of an inlet of the bypass catalytic converter, (iii) determining a temperature of an outlet of the bypass catalytic converter, and (iv) comparing the bypass catalytic converter outlet temperature to the bypass catalytic converter inlet temperature to determine if the bypass catalytic converter has failed.

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Chelsea, MI, United States of America

Steven C Wante