Exhaust gas recirculation system and method for operation thereof
AssigneeFord Global Technologies, LLC
InventorsChad Allan Baker, Gregory Patrick McConville, William Samuel Schwartz
Life of this patent
Estimating the term…
Abstract
An engine system is provided. The engine system may include an exhaust gas heat exchanger valve including an actuatable valve plate, a valve actuation assembly adjusting the position of the valve plate through operation of mechanical linkage coupled to the valve plate, and a flow reversal valve positioned in a coolant passage, the flow reversal valve configured to reverse the coolant flow in a flapper coolant conduit to trigger actuation of the mechanical linkage.
Claims20
An engine system comprising:
- an exhaust gas heat exchanger conduit including an exhaust gas heat exchanger valve
- the exhaust gas heat exchanger valve including an actuatable valve plate;
- a valve actuation assembly adjusting a position of the valve plate through operation of a mechanical linkage coupled to the valve plate;
- and
- a flow reversal valve positioned in a coolant passage, the flow reversal valve configured to reverse a coolant flow in a flapper coolant conduit to trigger actuation of the mechanical linkage.
A method for operation of an engine system comprising:
- during a first operating condition, moving an exhaust gas heat exchanger valve into a first position where a valve plate blocks a first outlet of an exhaust gas heat exchanger conduit opening into an exhaust passage, the exhaust gas heat exchanger valve moved into the first position through a valve actuation assembly and a flow reversal valve positioned in a coolant passage, the flow reversal valve configured to reverse a coolant flow in a flapper coolant conduit of the coolant passage to trigger actuation of mechanical linkage coupled to the valve plate;
- and
- during a second operating condition, moving the exhaust gas heat exchanger valve into a second position where the valve plate blocks a section of the exhaust passage between an inlet of the exhaust gas heat exchanger conduit and the first outlet.
An exhaust gas recirculation (EGR) system comprising:
- an exhaust gas heat exchanger valve including an actuatable valve plate, the valve plate being actuatable into a first and a second position, in the first position the valve plate blocks a first outlet of an exhaust gas heat exchanger conduit and in the second position the valve plate blocks a section of an exhaust passage between an inlet of the exhaust gas heat exchanger conduit and the first outlet;
- a valve actuation assembly adjusting a position of the valve plate through operation of mechanical linkage coupled to the valve plate;
- and
- a flow reversal valve positioned in a coolant passage, the flow reversal valve configured to reverse a coolant flow in a flapper coolant conduit to trigger actuation of the mechanical linkage.
Dependencies are inferred from the claim text.