公开(公告)号：US20220145823A1

公开(公告)日：2022-05-12

申请号：US17431186

申请日：2020-02-17

Applicant: Scania CV AB

Inventor： Andreas DAHL ,  Michael VALLINDER

IPC: F02D41/40 ,  F02D13/02 ,  F02D41/00

Abstract: Disclosed is a four-stroke direct injection engine comprising a camshaft, and exhaust valve, and a control system. The control system is configured to change the timing of the camshaft to advance a closing of the exhaust valve, control a first fuel injection step during a compression stroke of the piston, control a second fuel injection step during a power stroke of the piston, and control a third fuel injection step, after the second fuel injection step, during the power stroke of the piston.

公开(公告)号：US20190316529A1

公开(公告)日：2019-10-17

申请号：US16343421

申请日：2017-10-11

Applicant: SCANIA CV AB

Inventor： John GAYNOR ,  Torbjörn ELIASSEN ,  Andreas DAHL

IPC: F02D13/02 ,  F02B25/14 ,  F02B37/007 ,  F02B37/02 ,  F02D41/00

Abstract: The present invention relates to method for controlling a compression-ignition internal combustion engine, said internal combustion engine having at least one combustion chamber, wherein intake of air to said combustion chamber is controlled using an intake valve, and wherein evacuation of said combustion chamber is controlled using an exhaust valve. The method includes: controlling opening of said intake valve and closing of said exhaust valve in dependence of the position of a reciprocating member in said combustion chamber, wherein opening of said intake valve and closing of said exhaust valve, respectively, in relation to the position of said reciprocating member is individually controllable, and wherein, in one mode of operation, opening of said intake valve and closing of said exhaust valve, respectively, are controlled such that both valves are simultaneously open during a period of variable length.

公开(公告)号：US20190153906A1

公开(公告)日：2019-05-23

申请号：US16306759

申请日：2017-05-08

Applicant: Scania CV AB

Inventor： Eric OLOFSSON ,  Andreas DAHL ,  Johan LINDERYD ,  Henrik HÖGLUND ,  Torbjörn ELIASSEN ,  Per STÅLHAMMAR ,  Jonas ASPFORS

IPC: F01L1/053 ,  F01L1/08 ,  F01L9/02 ,  F01L1/18 ,  F01L1/46 ,  F01L13/00 ,  F02D41/00

Abstract: Provided is a four stroke internal combustion engine comprising at least one cylinder arrangement, a crankshaft, a camshaft, and a turbine. The camshaft is synchronized with the crankshaft to rotate at a same rotational speed as the crankshaft. A linkage arrangement is configured to prevent the motion of the valve head every alternate rotation of the camshaft, such that the exhaust opening remains closed during a compression stroke of the piston. Also a method for controlling a four stroke internal combustion engine is disclosed.

公开(公告)号：US20180320579A1

公开(公告)日：2018-11-08

申请号：US15772441

申请日：2016-10-05

Applicant: Scania CV AB

Inventor： Eric OLOFSSON ,  Daniel NORLING ,  Michael VALLINDER ,  Jonas ASPFORS ,  Johan LINDERYD ,  Henrik HÖGLUND ,  Per-Inge LARSSON ,  Andreas DAHL ,  Martin STENBERG

IPC: F02B27/04 ,  F02B75/02 ,  F02B37/02 ,  F02C6/12 ,  F02F7/00 ,  F02F1/42

CPC classification number: F02B27/04 ,  F02B37/02 ,  F02B37/025 ,  F02B75/02 ,  F02B2075/027 ,  F02C6/12 ,  F02F1/4264 ,  F02F7/006 ,  F05D2220/40 ,  Y02T10/144 ,  Y02T10/146

Abstract: A four stroke internal combustion engine is disclosed comprising at least one cylinder arrangement, an exhaust conduit, and at least one turbine. The cylinder arrangement comprises an exhaust port arrangement configured to open and close an exhaust flow area, ACYL. The cylinder arrangement has a maximum volume, VMAX. The exhaust conduit extends between the exhaust flow area, ACYL, and a turbine wheel inlet area, ATIN, of the turbine and has an exhaust conduit volume, VEXH that is ≤0.5 times the maximum volume, VMAX. The exhaust port arrangement is configured to expose the exhaust flow area, ACYL, at a size of at least 0.22 times the maximum volume, VMAX, when a piston of the cylinder arrangement is at the bottom dead centre, BDC.

公开(公告)号：US20240426256A1

公开(公告)日：2024-12-26

申请号：US18709171

申请日：2022-11-11

Applicant: Scania CV AB

Inventor： Oskar LEUFVEN ,  Erik HÖCKERDAL ,  Andreas DAHL ,  Håkan SARBY ,  Henrik WESTERFELT ,  Henrik SKOG ,  Michael VALLINDER

IPC: F02D41/40 ,  F02D41/00

Abstract: A method of controlling an internal combustion engine is disclosed, the internal combustion engine comprising at least two cylinders, wherein each cylinder comprises at least one fuel injector configured to inject fuel into the cylinder, wherein the method comprises controlling the fuel injection performed by the fuel injectors into the cylinders based on an estimate of a residual gas imbalance between the at least two cylinders. The present disclosure further relates to a computer program product, a control arrangement, an internal combustion engine, and a vehicle.

公开(公告)号：US20230212999A9

公开(公告)日：2023-07-06

申请号：US17431186

申请日：2020-02-17

Applicant: Scania CV AB

Inventor： Andreas DAHL ,  Michael VALLINDER

IPC: F02D41/40 ,  F02D13/02 ,  F02D41/00

CPC classification number: F02D41/402 ,  F02D13/0249 ,  F02D41/009

Abstract: Disclosed is a four-stroke direct injection engine comprising a camshaft, and exhaust valve, and a control system. The control system is configured to change the timing of the camshaft to advance a closing of the exhaust valve, control a first fuel injection step during a compression stroke of the piston, control a second fuel injection step during a power stroke of the piston, and control a third fuel injection step, after the second fuel injection step, during the power stroke of the piston.

公开(公告)号：US20200049080A1

公开(公告)日：2020-02-13

申请号：US16498855

申请日：2018-03-27

Applicant: Scania CV AB

Inventor： Andreas DAHL ,  Eric OLOFSSON

IPC: F02D13/02 ,  F01L13/00 ,  F01L1/04

Abstract: A four-stroke internal combustion engine is disclosed. A camshaft and a crankshaft if the engine are synchronised to rotate at a same rotational speed. A first linkage arrangement is configured to change the motion of an exhaust valve head. A second linkage arrangement is configured to change the motion of the intake valve head. A control unit is configured for controlling the first linkage arrangement to selectively prevent or reduce the motion of the exhaust valve head and for controlling the second linkage arrangement to selectively prevent or reduce the motion of the intake valve head.

公开(公告)号：US20230049122A1

公开(公告)日：2023-02-16

申请号：US17769366

申请日：2020-10-22

Applicant: Scania CV AB

Inventor： Andreas DAHL ,  Håkan SARBY

IPC: F02D13/02 ,  F02D13/04 ,  F02D41/14 ,  F02D41/00

Abstract: The disclosure concerns an internal combustion engine comprising an exhaust camshaft, an intake camshaft, a turbocharger, and a control system. The turbocharger comprises a compressor. A timing of the exhaust camshaft and a timing of the intake camshaft are controllable by the control system, which is configured to: store a compressor map related to the compressor, store a reference area within the compressor map, and determine at least two parameters. In response to the at least two parameters indicating that a current operational point of the compressor is outside the reference area, the control system changes the timing of the exhaust camshaft to advance closing of the exhaust valve, and the timing of the intake camshaft to delay opening of the intake valve.

公开(公告)号：US20220112847A1

公开(公告)日：2022-04-14

申请号：US17492245

申请日：2021-10-01

Applicant: Scania CV AB

Inventor： Andreas DAHL ,  Erik LIND ,  Christopher RINGSTRÖM

IPC: F02D13/02 ,  F02D13/04 ,  F02D35/02

Abstract: The disclosure concerns variable valve timing of a four-stroke ICE. The ICE comprises: an exhaust valve and an intake valve an exhaust camshaft an intake camshaft and a cylinder arrangement. The cylinder arrangement comprises a combustion chamber a cylinder bore and a piston. The control arrangement is configured to: perform a first sequence of changes in the timings of the exhaust and intake camshafts in order to arrive from a first camshaft timing setting at a second camshaft timing setting based on a first current maximum cylinder pressure within the combustion chamber around top dead centre fire and/or around to dead centre gas exchange.

公开(公告)号：US20200040774A1

公开(公告)日：2020-02-06

申请号：US16498819

申请日：2018-03-27

Applicant: Scania CV AB

Inventor： Andreas DAHL ,  Eric OLOFSSON

IPC: F01L1/06 ,  F02D13/02

Abstract: A four-stroke internal combustion engine is disclosed. A camshaft and a crankshaft if the engine are synchronized to rotate at a same rotational speed. A first linkage arrangement is configured to change the motion of an exhaust valve head. A second linkage arrangement is configured to change the motion of the intake valve head. A control unit is configured for controlling the first linkage arrangement to selectively prevent the motion of the exhaust valve head and for controlling the second linkage arrangement to selectively prevent the motion of the intake valve head.