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US 11,629,657 B2Granted
System and method for operating an engine in a fuel cut-out mode
AssigneeFord Global Technologies, LLC
InventorsRani Kiwan, Gopichandra Surnilla, Chris Paul Glugla
Life of this patent
Estimating the term…
Abstract
Methods and systems for operating an engine that includes adjustable poppet valve timing and an exhaust gas recirculation valve are described. In one example, the exhaust gas recirculation valve is opened and the timing of the poppet valves is retarded so that an amount of fresh air that is pumped by the engine to an after treatment device may be reduced.
Claims20
An engine operating method, comprising:
- adjusting intake valve closing timing and closing an exhaust gas recirculation valve of an engine via a controller in response to an engine exiting a fuel cut-out mode.
An engine system, comprising:
- an engine including a high pressure exhaust gas recirculation (EGR) valve and poppet valves;
- and
- a controller including executable instructions stored in non-transitory memory that cause the controller to close the high pressure EGR valve and adjust timing of the poppet valves in response a pedal being applied while the engine is rotating without being fueled following an engine stop rotation request.
An engine operating method, comprising:
- closing a fully open exhaust gas recirculation valve of an engine in response to the engine ceasing to rotate following an engine stop rotation request.
Dependencies are inferred from the claim text.