公开(公告)号：US20170002702A1

公开(公告)日：2017-01-05

申请号：US15039746

申请日：2014-12-03

Applicant: SCANIA CV AB

Inventor： Niclas GUNNARSSON ,  Cedric NYBERG ,  Eric OLOFSSON

IPC: F01L13/06 ,  F01L1/344 ,  F01L1/047 ,  F02B75/02

CPC classification number: F01L13/06 ,  F01L1/047 ,  F01L1/344 ,  F02B75/02 ,  F02B2075/027 ,  F02D13/0249 ,  F02D13/0273 ,  F02D13/04

Abstract: A method to control a four-stroke combustion engine, comprising at least one cylinder; a piston arranged in each cylinder; at least one inlet valve arranged in each cylinder which is connected with an inlet system; at least one first camshaft which controls each inlet valve; at least one exhaust valve arranged in each cylinder which is connected with an exhaust system; at least one second camshaft which controls each exhaust valve; and a crankshaft which controls each camshaft. At least one phase-shifting device is arranged between the crankshaft and the second camshaft, to phase-shift the second camshaft in relation to the crankshaft to a state, where the exhaust valve is controlled in such a way, that it is opened during the expansion stroke of the engine and closed during the exhaust stroke of the engine, to achieve engine braking through compression in the cylinders during the exhaust stroke.

Abstract translation: 一种控制四冲程内燃机的方法，包括至少一个汽缸; 一个排列在每个气缸中的活塞; 至少一个入口阀，布置在每个气缸中，其与入口系统连接; 至少一个第一凸轮轴，其控制每个入口阀; 至少一个排气阀，布置在与排气系统连接的每个气缸中; 至少一个第二凸轮轴，其控制每个排气阀; 以及控制每个凸轮轴的曲轴。 至少一个相移装置设置在曲轴和第二凸轮轴之间，以使第二凸轮轴相对于曲轴相移至排气门以这种方式被控制的状态，即在 发动机的膨胀冲程并且在发动机的排气冲程期间关闭，以在排气冲程期间通过气缸中的压缩来实现发动机制动。

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.

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：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.