Method for operating an internal combustion engine and internal combustion engine

Patent metadata

Field	Value
Publication number	US-2016003209-A1
Application number	US-201414777099-A
Country	US
Kind code	A1
Filing date	Feb 15, 2014
Priority date	Mar 19, 2013
Publication date	Jan 7, 2016
Grant date	—

Abstract

A method for operating a combustion engine is disclosed. In an embodiment, the method includes: generating several sparks to ignite a fuel-air mixture in a combustion chamber by an ignition device of the combustion engine, determining a combustion duration of at least one of the sparks, detecting a deviation of an actual operation from a target operation of the combustion engine at least depending on the combustion duration, compensating for the deviation by implementing at least one measure which influences a combustion of the fuel-air mixture in the combustion chamber, determining the combustion duration of the chronological first of the sparks, allocating the first spark to a first spark type or to a second spark type depending on the combustion duration, and implementing the at least one measure if at least one value which characterizes a frequency of one of the spark types exceeds a threshold value.

First claim

1 .- 10 . (canceled)

11 . A method for operating a combustion engine, comprising the steps of:
generating a plurality of sparks to ignite a fuel-air mixture in a combustion chamber by an ignition device of the combustion engine; determining a combustion duration of at least one of the plurality of sparks; detecting a deviation of an actual operation from a target operation of the combustion engine depending on the combustion duration; compensating for the deviation by implementing a measure which influences a combustion of the fuel-air mixture in the combustion chamber; determining the combustion duration of a chronological first spark of the plurality of sparks; allocating the first spark to a first spark type or to a second spark type depending on the combustion duration of the first spark; and implementing a measure if a value which characterizes a frequency of one of the spark types exceeds a threshold value.

12 . The method according to claim 11 , wherein the combustion duration is determined by the ignition device.

13 . The method according to claim 12 , wherein a signal which characterizes the determined combustion duration and/or a signal which characterizes the frequency is provided by the ignition device and is transmitted to a calculating device of the combustion engine which is different from the ignition device.

14 . The method according to claim 11 , wherein the threshold value is adjusted variably.

15 . The method according to claim 11 , wherein the combustion duration of the first spark is determined by a chronological course of a secondary current of the ignition device.

16 . The method according to claim 11 , wherein the combustion duration of the first spark is determined by a chronological course of a primary current of the ignition device.

17 . The method according to claim 11 , wherein as the measure, a quantity of a fuel of the fuel-air mixture introduced into the combustion chamber is changed.

18 . The method according to claim 11 , wherein as the measure, an injection time and/or ignition time is changed.

19 . The method according to claim 18 , wherein the injection time is changed relative to the ignition time.

20 . A combustion engine, comprising:
a combustion chamber having an ignition device to generate a plurality of sparks to ignite a fuel-air mixture in the combustion chamber and having a calculating device, wherein the calculating device is configured to:
determine a combustion duration of at least one of the plurality of sparks;
determine a deviation of an actual operation from a target operation of the combustion engine depending on the combustion duration;
compensate for the deviation by implementation of a measure which influences a combustion of the fuel-air mixture in the combustion chamber;
determine the combustion duration of a chronological first spark of the plurality of sparks;
allocate the first spark to a first spark type or to a second spark type depending on the combustion duration of the first spark; and
implement the measure if a value which characterizes a frequency of one of the spark types exceeds a threshold value.

21 . A method for operating a combustion engine, comprising the steps of:
generating a plurality of sparks to ignite a fuel-air mixture in a combustion chamber by an ignition device of the combustion engine; determining a combustion duration of a chronological first spark of the plurality of sparks; allocating the first spark to a first spark type or to a second spark type depending on the combustion duration of the first spark; and implementing a measure if a value which characterizes a frequency of one of the spark types exceeds a threshold value.

Assignees

• Daimler Ag

Inventors

• Bertsch Dietmar
• Ott Harald
• Schaupp Uwe

Classifications

• F02P15/08

  having multiple-spark ignition, i.e. ignition occurring simultaneously at different places in one engine cylinder or in two or more separate engine cylinders · CPC title

• F02D41/3023

  a mode being the stratified charge spark-ignited mode · CPC title

• F02P5/045 Primary

  combined with electronic control of other engine functions, e.g. fuel injection (in general F02D37/02) · CPC title

• F02D37/02

  one of the functions being ignition · CPC title

• F02P5/00

  Advancing or retarding ignition; Control therefor · CPC title