Method of controlling an exhaust valve arrangement
AssigneeVolvo Truck Corporation
InventorStephen Malick
Life of this patent
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Abstract
A method of controlling an exhaust valve arrangement of an internal combustion engine is provided. The exhaust valve arrangement is operable to direct combusted exhaust gas out from a combustion chamber of the internal combustion engine. The exhaust valve arrangement comprises a first exhaust valve and a second exhaust valve. The method includes determining a pressure level in the combustion chamber during compression release braking, comparing the pressure level with a predetermined threshold pressure; and controlling the exhaust valve arrangement to control either a single one, or both, of the first and second exhaust valves to be arranged in an open position during compression release braking in response to the pressure level being below or above the predetermined threshold pressure.
Claims14
A computer-implemented method of controlling an exhaust valve arrangement of an internal combustion engine, the exhaust valve arrangement is operable to direct combusted exhaust gas out from a combustion chamber of the internal combustion engine, wherein the exhaust valve arrangement comprises a first exhaust valve and a second exhaust valve,
- the method comprising:
- determining, by a processor device of a computer system, a pressure level in the combustion chamber during compression release braking,
- comparing, by the processor device, the pressure level with a predetermined threshold pressure;
- and
- controlling, by the processor device, the exhaust valve arrangement to arrange the first exhaust valve to be arranged in an open position and to arrange the second exhaust valve in a closed position when the pressure level in the combustion chamber is above the predetermined threshold pressure.
An exhaust valve arrangement operable to direct combusted exhaust gas out from a combustion chamber of an internal combustion engine, the exhaust valve arrangement comprising a first exhaust valve, a second exhaust valve, and processor device operable to control the first and second exhaust valves to assume an open and closed position, respectively, the processor device being configured to:
- determine a pressure level in the combustion chamber during compression release braking,
- compare the pressure level with a predetermined threshold pressure;
- and
- control the exhaust valve arrangement to arrange the first exhaust valve to be arranged in an open position and to arrange the second exhaust valve in a closed position when the pressure level in the combustion chamber is above the predetermined threshold pressure.
Dependencies are inferred from the claim text.