Invention Grant
- Patent Title: Method for the diagnosis of engine misfires in an internal combustion engine
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Application No.: US17007804Application Date: 2020-08-31
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Publication No.: US11226264B2Publication Date: 2022-01-18
- Inventor: Andre Shurkewitsch , Heiko Sternberg , Nikolaus Zimbalist , Robert Wetten , Elmar Millich , Jan Vogelsang
- Applicant: Volkswagen Aktiengesellschaft
- Applicant Address: DE Wolfsburg
- Assignee: Volkswagen Aktiengesellschaft
- Current Assignee: Volkswagen Aktiengesellschaft
- Current Assignee Address: DE Wolfsburg
- Agency: Muncy, Geissler, Olds & Lowe, P.C.
- Priority: DE102019213092.5 20190830
- Main IPC: G01M15/11
- IPC: G01M15/11 ; F02D41/14 ; F02D35/02 ; F02D41/22

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.
Public/Granted literature
- US20210063280A1 METHOD FOR THE DIAGNOSIS OF ENGINE MISFIRES IN AN INTERNAL COMBUSTION ENGINE Public/Granted day:2021-03-04
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