Controlling valve actuation of an internal combustion engine to prevent compressor surge
AssigneeScania CV AB
InventorsErik Höckerdal, Stefan Orrling, Oskar Leufven, Erik Lind, John Kroon
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Abstract
The disclosure concerns a method and a control arrangement for controlling valve actuation of an ICE comprising an exhaust valve, an intake valve, and a turbo compressor. The method comprises and the control arrangement is configured to: limiting/limit valve actuation changes of the exhaust and intake valves based on compressor data including surge limit data for the turbo compressor and one or both of a current turbo compressor rotational speed and a current turbo compressor pressure ratio, to maintain a turbo compressor mass flow above a limit mass flow value.
Claims20
A method for controlling valve actuation of an internal combustion engine (ICE), the ICE comprising an exhaust valve, an intake valve, a turbo compressor, and an electronic control unit (ECU) for controlling operation of the ICE, wherein the method comprises:
- determining that the ECU is implementing valve actuation changes to the exhaust and intake valves based on target actuation settings determined by the ECU;
- and
- limiting and/or preventing such valve actuation changes from being implemented by the ECU, wherein said limiting of determined valve actuation changes is based on compressor data including surge limit data for the turbo compressor and one or both of a current turbo compressor rotational speed and a current turbo compressor pressure ratio, so as to maintain a turbo compressor mass flow above a limit mass flow value and prevent or limit compressor surge events.
A computer program product comprising computer program code stored on a non-transitory computer-readable medium, said computer program code configured for controlling valve actuation of an internal combustion engine (ICE the ICE comprising an exhaust valve, an intake valve, a turbo compressor, and an electronic control unit (ECU) for controlling operation of the ICE, said computer program code comprising computer instructions to cause at least one computing processor to perform the following operations:
- determining that the ECU is implementing valve actuation changes to the exhaust and intake valves based on target actuation settings determined by the ECU;
- and
- limiting and/or preventing such valve actuation changes from being implemented by the ECU, wherein said limiting of determined valve actuation changes is based on compressor data including surge limit data for the turbo compressor and one or both of a current turbo compressor rotational speed and a current turbo compressor pressure ratio, so as to maintain a turbo compressor mass flow above a limit mass flow value and prevent or limit compressor surge events.
A control arrangement for controlling valve actuation of an internal combustion engine (ICE), the ICE comprising an exhaust valve, an intake valve, a turbo compressor, and an electronic control unit (ECU) for controlling operation of the ICE, wherein the control arrangement is configured to:
- determine that the ECU is implementing valve actuation changes to the exhaust and intake valves based on target actuation settings determined by the ECU;
- and
- limit and/or prevent such valve actuation changes from being implemented by the ECU, wherein said limiting of determined valve actuation changes is based on compressor data including surge limit data for the turbo compressor and one or both of a current turbo compressor rotational speed and a current turbo compressor pressure ratio, so as to maintain a turbo compressor mass flow above a limit mass flow value and prevent or limit compressor surge events.
An internal combustion engine (ICE), comprising:
- an exhaust valve;
- an intake valve;
- a turbo compressor;
- an electronic control unit (ECU) for controlling operation of the ICE;
- and
- a control arrangement configured to:
- determine that the ECU is implementing valve actuation changes to the exhaust and intake valves based on target actuation settings determined by the ECU;
- and
- limit and/or prevent such valve actuation changes from being implemented by the ECU, wherein said limiting of determined valve actuation changes is based on compressor data including surge limit data for the turbo compressor and one or both of a current turbo compressor rotational speed and a current turbo compressor pressure ratio, so as to maintain a turbo compressor mass flow above a limit mass flow value and prevent or limit compressor surge events.
A vehicle comprising an internal combustion engine (ICE), said ICE comprising:
- an exhaust valve;
- an intake valve;
- a turbo compressor;
- an electronic control unit (ECU) for controlling operation of the ICE;
- and
- a control arrangement configured to:
- determine that the ECU is implementing valve actuation changes to the exhaust and intake valves based on target actuation settings determined by the ECU;
- and
- limit and/or prevent such valve actuation changes from being implemented by the ECU, wherein said limiting of determined valve actuation changes is based on compressor data including surge limit data for the turbo compressor and one or both of a current turbo compressor rotational speed and a current turbo compressor pressure ratio, so as to maintain a turbo compressor mass flow above a limit mass flow value and prevent or limit compressor surge events.
A method for controlling valve actuation of an internal combustion engine (ICE), the ICE comprising an exhaust valve, an intake valve, and a turbo compressor, wherein the method comprises:
- limiting valve actuation changes of the exhaust and intake valves based on compressor data including surge limit data for the turbo compressor and one or both of a current turbo compressor rotational speed and a current turbo compressor pressure ratio, to maintain a turbo compressor mass flow above a limit mass flow value,
- wherein the limit mass flow value is based on the surge limit data and its value is adapted to a current ICE operating condition, and
- wherein the current ICE operating condition relates to a degree of change of ICE operation.
Dependencies are inferred from the claim text.