-
公开(公告)号：US11226264B2
公开(公告)日：2022-01-18
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
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：US11118520B2
公开(公告)日：2021-09-14
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
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：US11022054B2
公开(公告)日：2021-06-01
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
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.
-
-
Search Results
3
records
(took 0.011 seconds)
