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US 2024/0209807 A1Published application
Engine system
AssigneeVolvo Truck Corporation
InventorsOscar GARNEMARK, Ulf ARONSSON, Fredrik RAHM
Life of this patent
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Abstract
An engine system for a vehicle is provided. The engine system includes a first and a second turbine arrangement arranged in parallel with each other. A rotational speed of a first turbo arrangement is controlled in response to a distance between a first compressor map position and a surge line of a compressor map being below a predetermined threshold distance.
Claims15
An engine system for a vehicle, the engine system comprising:
- a first turbo arrangement comprising a first turbine and a first compressor operably connected to each other, the first turbine being configured to be arranged in downstream fluid communication with an internal combustion engine,
- a second turbo arrangement comprising a second turbine and a second compressor operably connected to each other, the second turbine being configured to be arranged in downstream fluid communication with the internal combustion engine and in parallel with the first turbine, wherein the first and second turbo arrangements are individually controllable, and
- a control unit comprising a processor device operable to individually control a rotational speed of the first and second turbo arrangements, respectively, the processor device being configured to:
- determine a first pressure and a first mass flow of air pressurized by the first compressor, and a second pressure and a second mass flow of air pressurized by the second compressor,
- determine a first compressor map position of the air pressurized by the first compressor, the first compressor map position being a position, defined by the first pressure and the first mass flow, within a compressor map, the compressor map defining a surge line, and
- control the rotational speed of the first turbo arrangement in response to a distance between the first compressor map position and the surge line being below a predetermined threshold distance.
3 more elements
A method of controlling an engine system connected to an internal combustion engine, the engine system comprising:
- a first turbo arrangement comprising a first turbine and a first compressor operably connected to each other, the first turbine being arranged in downstream fluid communication with the internal combustion engine, and
- a second turbo arrangement comprising a second turbine and a second compressor operably connected to each other, the second turbine being arranged in downstream fluid communication with the internal combustion engine in parallel with the first turbine, wherein the first and second turbo arrangements are individually controllable,
- the method comprising:
- determining a first pressure and a first mass flow of air pressurized by the first compressor, and a second pressure and a second mass flow of air pressurized by the second compressor,
- determining a first compressor map position of the air pressurized by the first compressor, the first compressor map position being a position, defined by the first pressure and the first mass flow, within a compressor map, wherein the compressor map defines a surge line, and
- controlling the rotational speed of the first turbo arrangement in response to a distance between the first compressor map position and the surge line being below a predetermined threshold distance.
3 more elements
Dependencies are inferred from the claim text.