Inventors:
Daniel Lawrence Meyer - Dearborn MI
Philip William Husak - Southgate MI
William Francis Stockhausen - Northville MI
Assignee:
Ford Global technologies, Inc. - Dearborn MI
International Classification:
F01N 300
US Classification:
60284, 60274, 60285, 123 9015, 123 9011, 123299, 123478
Abstract:
A method and system for reducing cold-start emissions of an automotive vehicle having an internal combustion engine. System includes a main controller or control system , a variable valve timing system , an ignition system , a fuel metering system , and vehicle operating condition sensors. Controller detects cold-start conditions based on signals received from sensors , and in response to such a detection, controller generates command signals to said variable valve timing system , to said ignition system , and to said fuel metering system , effective to respectively alter valve timing, spark timing, and said air/fuel delivery of engine in a manner which synergistically increases air/fuel enleanment limits, improves combustion characteristics, and increases exhaust gas temperature, thereby reducing cold-start emissions.