Catalyst temperature maintenance systems and methods
Number of patents in Portfolio can not be more than 2000
United States of America
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app pub date -
Jun 1, 2018
filing date -
Jun 1, 2018
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Abstract
A catalyst temperature control system of a vehicle includes a fuel control module configured to control fuel injection based on a target air/fuel ratio that is fuel lean relative to a stoichiometric air/fuel ratio and a target fuel injection start timing. An exhaust gas recirculation (EGR) control module is configured to control an EGR valve based on a target EGR opening. An adjustment module is configured to, when a temperature of a catalyst in an exhaust system is less than a sum of a predetermined light-out temperature of the catalyst and a predetermined temperature and the target air/fuel ratio is fuel lean relative to the stoichiometric air/fuel ratio, based on a comparison of an engine speed and a predetermined engine speed, selectively adjust at least one of: a target throttle opening, a target spark timing, the target fuel injection start timing, the target air/fuel ratio, and the target EGR opening.
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