公开(公告)号：US20210254544A1

公开(公告)日：2021-08-19

申请号：US17177095

申请日：2021-02-16

Applicant: Andreas Stihl AG & Co. KG

Inventor： Robert Koehli ,  Tilman Seidel ,  Jan Pawlowski ,  Tobias Deigendesch

IPC: F02B33/04 ,  F02B25/00 ,  F02F3/24 ,  F02F1/22 ,  F02M61/14 ,  F02D9/02 ,  F02M35/10 ,  F02B33/30

Abstract: A two-stroke engine includes a cylinder having a combustion chamber. The combustion chamber is delimited by a piston guided in a reciprocating manner in the cylinder and drives a crankshaft. A first intake channel opens into the crankcase interior. A transfer channel opens into the crankcase interior via a transfer window on a cylinder bore of the cylinder and via a passage opening. A second intake channel is provided for supplying scavenging air to the transfer channel. The first intake channel and the second intake channel are configured for supplying air. An injection valve configured for injecting the entire quantity of fuel to be supplied to the engine directly into the crankcase interior is disposed on the crankcase. A method for operating a two-stroke engine provides that the entire quantity of fuel to be supplied to the engine via a metering installation is supplied directly to the crankcase interior.

公开(公告)号：US20220389934A1

公开(公告)日：2022-12-08

申请号：US17829959

申请日：2022-06-01

Applicant: Andreas Stihl AG & Co. KG

Inventor： Jan Pawlowski ,  Benjamin Barth

IPC: F04D29/02 ,  F04D29/28 ,  F01P5/04

Abstract: The disclosure concerns a fan wheel, including a base body with a rotational axis, and a swing part. The base body is made of a first material and the swing part is made of a second material. The density of the second material and the density of the first material are different. The swing part has a surface. The swing part is at least partially surrounded by the base body, so that the base body covers at least 80%, in particular at least 90%, preferably at least 95% of the surface of the swing part. The first material has a first thermal expansion coefficient, and the second material has a second thermal expansion coefficient. The second thermal expansion coefficient amounts to 70% to 110%, in particular 80% to 100%, preferably 85% to 95% of the first thermal expansion coefficient, and/or the swing part is substantially annular and runs fully closed around the rotational axis.

公开(公告)号：US11795961B2

公开(公告)日：2023-10-24

申请号：US17829959

申请日：2022-06-01

Applicant: Andreas Stihl AG & Co. KG

Inventor： Jan Pawlowski ,  Benjamin Barth

IPC: F04D29/02 ,  F01P5/04 ,  F04D29/28

CPC classification number: F04D29/023 ,  F01P5/04 ,  F04D29/281

Abstract: The disclosure concerns a fan wheel, including a base body with a rotational axis, and a swing part. The base body is made of a first material and the swing part is made of a second material. The density of the second material and the density of the first material are different. The swing part has a surface. The swing part is at least partially surrounded by the base body, so that the base body covers at least 80%, in particular at least 90%, preferably at least 95% of the surface of the swing part. The first material has a first thermal expansion coefficient, and the second material has a second thermal expansion coefficient. The second thermal expansion coefficient amounts to 70% to 110%, in particular 80% to 100%, preferably 85% to 95% of the first thermal expansion coefficient, and/or the swing part is substantially annular and runs fully closed around the rotational axis.

公开(公告)号：US11773767B2

公开(公告)日：2023-10-03

申请号：US17177095

申请日：2021-02-16

Applicant: Andreas Stihl AG & Co. KG

Inventor： Robert Koehli ,  Tilman Seidel ,  Jan Pawlowski ,  Tobias Deigendesch

IPC: F02B33/04 ,  F02B33/30 ,  F02B25/00 ,  F02F1/22 ,  F02F3/24 ,  F02D9/02 ,  F02M61/14 ,  F02M69/10 ,  F02M35/10 ,  F02B75/02

CPC classification number: F02B33/04 ,  F02B25/00 ,  F02B33/30 ,  F02D9/02 ,  F02F1/22 ,  F02F3/24 ,  F02M35/1019 ,  F02M61/14 ,  F02B2075/025

Abstract: A two-stroke engine includes a cylinder having a combustion chamber. The combustion chamber is delimited by a piston guided in a reciprocating manner in the cylinder and drives a crankshaft. A first intake channel opens into the crankcase interior. A transfer channel opens into the crankcase interior via a transfer window on a cylinder bore of the cylinder and via a passage opening. A second intake channel is provided for supplying scavenging air to the transfer channel. The first intake channel and the second intake channel are configured for supplying air. An injection valve configured for injecting the entire quantity of fuel to be supplied to the engine directly into the crankcase interior is disposed on the crankcase. A method for operating a two-stroke engine provides that the entire quantity of fuel to be supplied to the engine via a metering installation is supplied directly to the crankcase interior.

公开(公告)号：US11976587B2

公开(公告)日：2024-05-07

申请号：US18455376

申请日：2023-08-24

Applicant: Andreas Stihl AG & Co. KG

Inventor： Robert Koehli ,  Tilman Seidel ,  Jan Pawlowski ,  Tobias Deigendesch

IPC: F02B33/04 ,  F02B25/00 ,  F02B33/30 ,  F02D9/02 ,  F02F1/22 ,  F02F3/24 ,  F02M35/10 ,  F02M61/14 ,  F02B75/02

CPC classification number: F02B33/04 ,  F02B25/00 ,  F02B33/30 ,  F02D9/02 ,  F02F1/22 ,  F02F3/24 ,  F02M35/1019 ,  F02M61/14 ,  F02B2075/025

Abstract: A two-stroke engine includes a cylinder having a combustion chamber. The combustion chamber is delimited by a piston guided in a reciprocating manner in the cylinder and drives a crankshaft. A first intake channel opens into the crankcase interior. A transfer channel opens into the crankcase interior via a transfer window on a cylinder bore of the cylinder and via a passage opening. A second intake channel is provided for supplying scavenging air to the transfer channel. The first intake channel and the second intake channel are configured for supplying air. An injection valve configured for injecting the entire quantity of fuel to be supplied to the engine directly into the crankcase interior is disposed on the crankcase. A method for operating a two-stroke engine provides that the entire quantity of fuel to be supplied to the engine via a metering installation is supplied directly to the crankcase interior.

公开(公告)号：US20230399974A1

公开(公告)日：2023-12-14

申请号：US18455376

申请日：2023-08-24

Applicant: Andreas Stihl AG & Co. KG

Inventor： Robert Koehli ,  Tilman Seidel ,  Jan Pawlowski ,  Tobias Deigendesch

IPC: F02B33/04 ,  F02B25/00 ,  F02F3/24 ,  F02F1/22 ,  F02D9/02 ,  F02M35/10 ,  F02B33/30 ,  F02M61/14

CPC classification number: F02B33/04 ,  F02B25/00 ,  F02F3/24 ,  F02F1/22 ,  F02D9/02 ,  F02M35/1019 ,  F02B33/30 ,  F02M61/14 ,  F02B2075/025

Abstract: A two-stroke engine includes a cylinder having a combustion chamber. The combustion chamber is delimited by a piston guided in a reciprocating manner in the cylinder and drives a crankshaft. A first intake channel opens into the crankcase interior. A transfer channel opens into the crankcase interior via a transfer window on a cylinder bore of the cylinder and via a passage opening. A second intake channel is provided for supplying scavenging air to the transfer channel. The first intake channel and the second intake channel are configured for supplying air. An injection valve configured for injecting the entire quantity of fuel to be supplied to the engine directly into the crankcase interior is disposed on the crankcase. A method for operating a two-stroke engine provides that the entire quantity of fuel to be supplied to the engine via a metering installation is supplied directly to the crankcase interior.

公开(公告)号：US10718295B2

公开(公告)日：2020-07-21

申请号：US16244984

申请日：2019-01-10

Applicant: Andreas Stihl AG & Co. KG

Inventor： Jan Dworschak ,  Jan Pawlowski

IPC: F02M1/02 ,  F02D9/16 ,  F02D35/00 ,  F02M9/08 ,  F02B33/04 ,  F02B63/02 ,  F02M17/02 ,  F02M35/10 ,  F02B75/02

Abstract: A carburetor for the combustion engine in a handheld work apparatus has a carburetor housing in which a carburetor drum is mounted rotatably about a pivot axis. The carburetor drum has a drum body which has at least one channel which runs transversely with respect to the pivot axis and forms an intake channel portion. A sensing unit for sensing at least one rotational position of the carburetor drum is provided. The sensing unit includes a control contour and a sensing device interacting with the control contour. The control contour is formed on the carburetor drum. A method for operating a combustion engine makes provision for the control device to control the supplied quantity of fuel depending on the rotational position, sensed by the sensing unit, of the carburetor drum.

公开(公告)号：US20190211778A1

公开(公告)日：2019-07-11

申请号：US16244984

申请日：2019-01-10

Applicant: Andreas Stihl AG & Co. KG

Inventor： Jan Dworschak ,  Jan Pawlowski

IPC: F02M1/02 ,  F02B63/02 ,  F02M35/10 ,  F02M17/02 ,  F02B33/04

Abstract: A carburetor for the combustion engine in a handheld work apparatus has a carburetor housing in which a carburetor drum is mounted rotatably about a pivot axis. The carburetor drum has a drum body which has at least one channel which runs transversely with respect to the pivot axis and forms an intake channel portion. A sensing unit for sensing at least one rotational position of the carburetor drum is provided. The sensing unit includes a control contour and a sensing device interacting with the control contour. The control contour is formed on the carburetor drum. A method for operating a combustion engine makes provision for the control device to control the supplied quantity of fuel depending on the rotational position, sensed by the sensing unit, of the carburetor drum.