Method for controlling a valve arrangement
AssigneeVolvo Truck Corporation
InventorsPer Persson, Martin Svensson
Life of this patent
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Abstract
A method for controlling a valve arrangement for an internal combustion engine, the valve arrangement including a piston arrangement comprising a piston having a piston end portion facing an inlet valve of the valve arrangement. The method includes receiving a signal indicative of a temperature level of an exhaust gas after treatment system and when the signal indicates a temperature level below a predetermined threshold level: advancing an exhaust event of the internal combustion engine; and controlling the piston arrangement for reducing the distance between the piston end portion and the inlet valve before the internal combustion engine assumes an air intake event.
Claims17
A method for controlling a valve arrangement of an internal combustion engine comprising an exhaust gas aftertreatment system, the valve arrangement comprising at least one inlet valve configured to be arranged in an open position during an air intake event of the internal combustion engine, and at least one exhaust valve configured to be arranged in an open position during an exhaust event of the internal combustion engine;
- the valve arrangement further comprising a piston arrangement comprising a piston having a piston end portion facing the inlet valve, the piston being arranged to controllably position the inlet valve in the open position, wherein the piston end portion and the inlet valve are arranged at a distance, by means of an air gap, from each other when the inlet valve is arranged in a closed position;
- the method comprising the steps of:
- receiving a signal indicative of a temperature level of the exhaust gas aftertreatment system and when the signal indicates a temperature level below a predetermined threshold level:
- advancing the exhaust event of the internal combustion engine;
- and
- controlling the piston arrangement for reducing the distance between the piston end portion and the inlet valve before the internal combustion engine assumes the air intake event.
A valve arrangement for an internal combustion engine comprising an exhaust gas aftertreatment system, the valve arrangement comprising at least one inlet valve configured to be arranged in an open position during an air intake event of the internal combustion engine, and at least one exhaust valve configured to be arranged in an open position during an exhaust event of the internal combustion engine;
- the valve arrangement further comprising a piston arrangement comprising a piston having piston end portion facing the inlet valve, wherein the piston end portion and the inlet valve are arranged at a distance, by means of an air gap, from each other when the inlet valve is arranged in a closed position;
- wherein the valve arrangement comprises a control unit configured to:
- receive a signal indicative of a temperature level of the exhaust gas aftertreatment system and when the signal indicates a temperature level below a predetermined threshold level:
- transmit a control signal to the valve arrangement for advancing the exhaust event of the internal combustion engine;
- and
- transmit a control signal to the valve arrangement for reducing the distance between the piston end portion and the inlet valve before the internal combustion engine assumes the air intake event.
Dependencies are inferred from the claim text.