Invention Grant
- Patent Title: Method for avoiding incorrect combustion misfire fault detection in a motor vehicle
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Application No.: US14539186Application Date: 2014-11-12
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Publication No.: US09765720B2Publication Date: 2017-09-19
- Inventor: Manuel Koch , Sandra Kustermann
- Applicant: Bayerische Motoren Werke Aktiengesellschaft
- Applicant Address: DE Munich
- Assignee: Bayerische Motoren Werke Aktiengesellschaft
- Current Assignee: Bayerische Motoren Werke Aktiengesellschaft
- Current Assignee Address: DE Munich
- Agency: Crowell & Moring LLP
- Priority: DE102013223396 20131115
- Main IPC: F02D41/14
- IPC: F02D41/14 ; G01M15/11 ; F02D41/12

Abstract:
A method is provided for avoiding incorrect combustion misfire fault detection in an internal combustion engine in a motor vehicle with a dual mass flywheel. In order to detect combustion misfiring, a characteristic variable, which is dependent on the acceleration of the internal combustion engine, is determined continuously during the ongoing operation of the internal combustion engine and compared with a predefined irregular running threshold value. When the irregular running threshold value is exceeded, a combustion misfire is detected, wherein the frequency of detected combustion misfiring, for example at a specific number of crank shaft revolutions, is detected. When a defined frequency threshold is exceeded, a combustion misfire fault detection is activated. When a dual mass flywheel bounce is detected with the simultaneous detection of combustion misfiring, the injection of at least one cylinder is reduced or switched off for a predefined frequency or for a predefined time.
Public/Granted literature
- US20150135810A1 Method for Avoiding Incorrect Combustion Misfire Fault Detection in a Motor Vehicle Public/Granted day:2015-05-21
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