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US 11,454,178 B2Granted
Method for controlling an internal combustion engine arrangement
AssigneeVolvo Truck Corporation
InventorsArne Andersson, Lennart Andersson
Life of this patent
Estimating the term…
Abstract
The present invention relates to a method for controlling an internal combustion engine arrangement, which method comprises the steps of controlling an outlet valve to be arranged in an at least partial open position during a portion of an intake stroke; and providing a reducing agent to at least a portion of the flow of combustion gas exhausted from the combustion cylinder during an exhaust stroke.
Claims20
A method for controlling an internal combustion engine arrangement, the internal combustion engine arrangement comprising:
- a combustion cylinder housing a reciprocating piston movable between a bottom dead center and a top dead center within the combustion cylinder;
- an inlet valve operable between an open position and a closed position, the inlet valve being arranged in the open position during at least a part of an intake stroke of the reciprocating piston for allowing a flow of fluid medium into the combustion cylinder;
- and
- an outlet valve operable between an open position and a closed position, the outlet valve being arranged in the open position during at least a part of an exhaust stroke of the reciprocating piston for directing a flow of combustion gas out from the combustion cylinder and into an exhaust manifold of the internal combustion engine arrangement;
- the method comprising the steps of:
- controlling the outlet valve to be arranged in an at least partial open position during a portion of the intake stroke;
- and
- providing, during the exhaust stroke, a reducing agent to at least a portion of the flow of combustion gas exhausted into the exhaust manifold from the combustion cylinder, wherein the reducing agent is not rebreathed into the combustion cylinder.
5 more elements
An internal combustion engine arrangement comprising:
- a combustion cylinder housing a reciprocating piston movable between a bottom dead center and a top dead center within the combustion cylinder;
- an inlet valve operable between an open position and a closed position, the inlet valve being arranged in the open position during at least a part of an intake stroke of the reciprocating piston for allowing a flow of fluid medium into the combustion cylinder;
- an outlet valve operable between an open position and a closed position, the outlet valve being arranged in the open position during at least a part of an exhaust stroke of the reciprocating piston for directing a flow of combustion gas out from the combustion cylinder;
- a reducing agent injector positioned in downstream fluid communication with the combustion cylinder and arranged to inject a reducing agent to at least a portion of the flow of combustion gas exhausted from the combustion cylinder during the exhaust stroke;
- and
- a control unit connectable to the outlet valve and the reducing agent injector, the control unit being configured to:
- control the outlet valve to be arranged in an at least partial open position during a portion of the intake stroke;
- and
- control the reducing agent injector, during the exhaust stroke, to provide the reducing agent to at least a portion of the flow of combustion gas exhausted into the exhaust manifold from the combustion cylinder, wherein the reducing agent is not rebreathed into the combustion cylinder.
6 more elements
Dependencies are inferred from the claim text.