Operating method for a boosted engine of an engine system of a vehicle involves exothermically reacting blow through airflow with fuel in the exhaust after injecting second amount of fuel outside of the valve overlap

• Main Authors: LAING, PAUL M, PAKKO, JAMES DAVID, SHANE, MICHAEL DANIEL
• Format: Patent
• Language: English; German
• Published: 19.09.2013
• Subjects: BLASTING; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION; COMBUSTION ENGINES; CONTROLLING COMBUSTION ENGINES; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MECHANICAL ENGINEERING; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; WEAPONS

The operating method involves operating the engine (10) with positive intake to exhaust valve (156) overlap to drive the boosted blow through airflow into an engine exhaust through the engine cylinders (30). A certain amount of fuel is injected during the valve overlap. A second amount of fuel is injected outside of the valve overlap. A blow through airflow is exothermically reacted with fuel in the exhaust. An independent claim is also included for an engine system. Es werden Verfahren und Systeme zum Erwärmen eines Katalysators während Bedingungen eines Brennkraftmaschinen-Kaltstarts geschaffen. Eine beispielhafte Ausführungsform verwendet eine positive Ventilüberlappung, um einen aufgeladenen Durchblasluftstrom durch die Zylinder einer Brennkraftmaschine zu leiten. Kraftstoff wird mit dem Durchblasluftstrom während der Ventilüberlappung eingespritzt und außerdem außerhalb der Ventilüberlappung in Brennkraftmaschinenzylinder eingespritzt. Der Katalysator wird als Ergebnis einer exothermen Reaktion des Durchblasluftstroms mit den Verbrennungsprodukten und dem eingespritzten Kraftstoff in dem Abgaskrümmer erwärmt.