公开(公告)号：US20170058823A1

公开(公告)日：2017-03-02

申请号：US14833812

申请日：2015-08-24

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Alan W. Hayman ,  Kenneth M. Eastman ,  Edward J. Keating ,  Erwan Gautier

IPC: F02F1/42

CPC classification number: F02F1/4285 ,  F01L3/22 ,  F02F1/4235 ,  Y02T10/146

Abstract: A cylinder head defines an inlet port having an exit. A valve seat insert defines a seat cut surface that is disposed adjacent to the exit of the inlet port. A cross section of the inlet port parallel to a centerline of the inlet port defines a long turn edge of the inlet port cross section. The long turn edge of the inlet port cross section defines a flow path trajectory of the inlet port. The seat cut surface and the flow path trajectory are substantially aligned to extend the flow path trajectory of the long turn edge of the inlet port cross section across the seat cut surface.

Abstract translation: 气缸盖限定具有出口的入口。 阀座插入件限定了邻近入口端口设置的座椅切割表面。 入口端口的平行于入口端口的中心线的横截面限定入口端口横截面的长转弯边缘。 入口端口横截面的长转弯边限定入口端口的流路轨迹。 座椅切割表面和流动路径轨迹基本上对齐，以延伸穿过座椅切割表面的入口端口横截面的长转弯边缘的流动路径轨迹。

公开(公告)号：US20200318535A1

公开(公告)日：2020-10-08

申请号：US16375423

申请日：2019-04-04

Applicant: GM Global Technology Operations LLC

Inventor： Erwan Gautier ,  Justin Ketterer ,  Ryan Heinbuch

IPC: F02B75/04

Abstract: A crankshaft is rotatably supported by an engine block and rotatable about a crank axis. An eccentric shaft is rotatably supported within the engine and rotatable about an eccentric shaft axis, wherein the eccentric shaft axis is parallel to and distal from the crank axis. A speed change mechanism interlinks movement of the eccentric shaft and the crankshaft. The speed change mechanism selectively varies a ratio of a rotational speed of the eccentric shaft relative to a rotational speed of the crankshaft from 1:1 to one of: −8:1, −6:1, 4:1 −2:1, −1:1, −0.5:1, 0:1, 0.5:1, 1:1, 2:1, 4:1, 6:1, and 8:1, thereby causing the eccentric shaft to rotate at a speed different from the crankshaft and varying a rotational position of the eccentric shaft relative to the crankshaft.

公开(公告)号：US11268437B2

公开(公告)日：2022-03-08

申请号：US16375423

申请日：2019-04-04

Applicant: GM Global Technology Operations LLC

Inventor： Erwan Gautier ,  Justin Ketterer ,  Ryan Heinbuch

IPC: F02B75/04

Abstract: A crankshaft is rotatably supported by an engine block and rotatable about a crank axis. An eccentric shaft is rotatably supported within the engine and rotatable about an eccentric shaft axis, wherein the eccentric shaft axis is parallel to and distal from the crank axis. A speed change mechanism interlinks movement of the eccentric shaft and the crankshaft. The speed change mechanism selectively varies a ratio of a rotational speed of the eccentric shaft relative to a rotational speed of the crankshaft from 1:1 to one of: −8:1, −6:1, −4:1, −2:1, −1:1, −0.5:1, 0:1, 0.5:1, 1:1, 2:1, 4:1, 6:1, and 8:1, thereby causing the eccentric shaft to rotate at a speed different from the crankshaft and varying a rotational position of the eccentric shaft relative to the crankshaft.