公开(公告)号：US20190017450A1

公开(公告)日：2019-01-17

申请号：US16134036

申请日：2018-09-18

Applicant: VOLKSWAGEN AKTIENGESELLSCHAFT

Inventor： Elmar MILLICH ,  Lars PETERSEN ,  René KLEINHANS ,  Andre SHURKEWITSCH ,  Jean-Sebastian TEMPEL

IPC: F02D35/02 ,  F02D41/14 ,  F02D41/00 ,  G01M15/10

CPC classification number: F02D35/024 ,  F02D35/02 ,  F02D41/0062 ,  F02D41/1448 ,  F02D2200/024 ,  F02D2200/0411 ,  G01M15/106 ,  Y02T10/47

Abstract: A method for determining the quantity of filling components in a cylinder of an internal combustion engine. The cylinder is connected to an air supply via an inlet valve and to an exhaust gas conduit via an outlet valve. The method includes the steps of obtaining an exhaust gas back pressure at a specified point in time when the outlet valve is opened during a work cycle of the internal combustion engine and calculating the quantity of the filling components at the specified point in time on the basis of the obtained exhaust gas back pressure. A controller is also provided for carrying out the method and a motor vehicle is also provided that includes the controller.

公开(公告)号：US20210062736A1

公开(公告)日：2021-03-04

申请号：US17006299

申请日：2020-08-28

Applicant: Volkswagen Aktiengesellschaft

Inventor： Andre SHURKEWITSCH ,  Robert WETTEN ,  Elmar MILLICH ,  Jan VOGELSANG ,  Nikolaus ZIMBALIST ,  Heiko STERNBERG

IPC: F02D41/00 ,  F02P5/14 ,  F02D41/14

Abstract: A method and control unit for cylinder equalization of an internal combustion engine having at least two cylinders, and includes the following steps: Determination of exhaust gas back pressure values of the individual cylinders over at least two operating cycles, correlation of the exhaust gas back pressure values with the camshaft position and/or the operating cycle, determination of the exhaust gas back pressure maxima for each cylinder, comparison of the exhaust gas back pressure maxima between the individual cylinders and detection of differences, adjustment of the cylinder-specific charge quantities of fresh air and/or fuel. In addition, the invention relates to a controller for carrying out the method and a motor vehicle having such a controller. The method improves the previously known methods and makes them more efficient, especially with regard to the efficiency of the combustion process and thus also of exhaust-gas aftertreatment.

公开(公告)号：US20190017449A1

公开(公告)日：2019-01-17

申请号：US16067464

申请日：2017-01-30

Applicant: Volkswagen Aktiengesellschaft

Inventor： Elmar MILLICH ,  Lars PETERSEN ,  Andre SHURKEWITSCH

IPC: F02D35/02 ,  F02D41/00 ,  F02D41/14

Abstract: A method of calculating a residual gas mass in a cylinder of an internal combustion engine, wherein the cylinder has at least one intake valve and one exhaust valve, comprising: obtaining a cylinder residual gas mass base value that is based on a predefined model; determining a first cylinder residual gas mass value that indicates a cylinder residual gas mass remaining in the cylinder clearance volume after an expulsion of exhaust gas; determining a second cylinder residual gas mass value that indicates a cylinder residual gas mass flowing into the cylinder due to a valve overlap of the intake valve and the exhaust valve, wherein the second cylinder residual gas mass value is determined based on the cylinder residual gas mass base value and the first cylinder residual gas mass value; and calculating the residual gas mass in the cylinder, based on the first and second cylinder residual gas mass values.

公开(公告)号：US20210063280A1

公开(公告)日：2021-03-04

申请号：US17007804

申请日：2020-08-31

Applicant: Volkswagen Aktiengesellschaft

Inventor： Andre SHURKEWITSCH ,  Heiko STERNBERG ,  Nikolaus ZIMBALIST ,  Robert WETTEN ,  Elmar MILLICH ,  Jan VOGELSANG

IPC: G01M15/11 ,  F02D41/14

Abstract: A method for the diagnosis of engine misfires in an internal combustion engine having at least one cylinder, and includes the steps of: Determining exhaust back pressure values of the individual cylinders over at least two working cycles, correlating the exhaust back pressure values with the camshaft position and/or the working cycle, determining the exhaust back pressure maxima and/or exhaust back pressure minima per working cycle, comparing the exhaust back pressure maxima and/or exhaust back pressure minima between the individual cylinders—in the case of multiple cylinders—and/or to maximum and/or minimum values from previous working cycles and determining the deviations, comparing the deviations to a predetermined threshold value. The invention also relates to a control device for carrying out the method and a motor vehicle including such a control device.

公开(公告)号：US20210054793A1

公开(公告)日：2021-02-25

申请号：US17001622

申请日：2020-08-24

Applicant: Volkswagen Aktiengesellschaft

Inventor： Jan VOGELSANG ,  Tobias VIEREG ,  Marcin PIORUN ,  Andre SHURKEWITSCH ,  Heiko STERNBERG ,  Nikolaus ZIMBALIST

IPC: F02D41/00

Abstract: A method for determining the cylinder air-charge of an internal combustion engine in a non-fired operation, wherein a method for determining the cylinder air-charge in a fired operation is performed. According to the invention, provision is made that in the method for determining the cylinder air-charge in the fired operation, a correction factor is provided as a function of engine speed and engine load which adjusts the value of the cylinder air-charge determined by the method in the fired operation to the non-fired operation. Thus, the previously known methods can be improved and made more efficient, in particular in view of the deviations of up to 30% between the cylinder air-charge values in the non-fired operation and the modeled values of the fired operation.