Ford Global Technolgoies, LLC

Calvin Trescott

Gopichandra Surnilla

Rajit Johri

Mohannad Hakeem

Adithya Pravarun Re Ranga

Maruthi Ravichandran

Joseph Norman Ulrey

Naginder Gogna

Nicholas David Moore

Jeffrey Allen Doering

Ralph Wayne Cunningham

Jason Meyer

Stephen B Smith

Peter Charles Moilanen

Marin Assaliyski

Kutaiba Alrefaai

Systems and methods for operating a hybrid vehicle are presented. In one example, an integrated starter/generator (ISG) is operated in a speed control mode after an engine stop request. The ISG is prevented from stopping while engine rotational speed is greater than a threshold engine rotational speed so that the engine may be restarted via the ISG.

System and method for restarting an engine

Systems and methods for selecting which of a plurality of engine starting devices starts an internal combustion engine of a hybrid vehicle are presented. In one example, engine starting devices may be selected and operated while a vehicle is operating in a creep mode. The system and method may place a driveline disconnect clutch in a wait state or engage a flywheel starter to improve engine starting.

System and method for controlling engine starting devices

Systems and methods for starting an engine of a hybrid vehicle are described. In one example, the method selects one or more electric machines to start an engine. The method may reference a data structure, such as a matrix or table, and the matrix or table outputs which of the one or more electric machines is applied to start the engine.

Methods and system for starting an engine

Methods and systems are provided for adjusting engine operating conditions for reduction of NOx emissions. In one example, immediately after a fuel shut-off event, in response to an oxygen content of an exhaust catalyst being higher than a threshold, manifold charge cooling may be increased by increasing the portion of fuel delivered to the engine via manifold injection relative to the portion to fuel delivered via one or more of port and direct injection. By increasing manifold cooling, NOx production may be reduced.

Methods and system for central fuel injection

Methods and systems are provided for adjusting engine operating conditions for mitigation of pre-ignition in one or more engine cylinder. In one example, a method may include, in response to indication of pre-ignition, manifold charge cooling may be increased by increasing the portion of fuel delivered to the engine via manifold injection relative to the portion to fuel delivered via one or more of port and direct injection, while maintaining engine operation at or around a stoichiometric air-fuel ratio.

Methods and systems for central fuel injection

Methods and systems are provided for leveraging the charge cooling effect of a manifold fuel injection. A charge cooling effect of a scheduled manifold fuel injection may be predicted based on feedback received from a manifold charge temperature sensor during a preceding manifold injection event. If sufficient charge cooling is not predicted, the manifold fuel injection is temporarily disabled.

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Farmington Hills, MI, United States of America

Calvin Trescott