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Method for controlling an internal combustion engine

A technology of internal combustion engine and pre-control value, applied in electrical control, engine control, fuel injection control, etc.

Active Publication Date: 2017-03-01
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore this method is not suitable for intake pipe motors

Method used

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  • Method for controlling an internal combustion engine
  • Method for controlling an internal combustion engine
  • Method for controlling an internal combustion engine

Examples

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Embodiment Construction

[0030] exist figure 1 shows schematically in plan view a section of a motor vehicle having an internal combustion engine 10 with a fuel system 20 , an air supply system 30 and an exhaust system 40 as well as a computing unit 50 which serves as A controller for operating the motor vehicle. Internal combustion engine 10 is preferably designed as an Otto engine with direct fuel injection. In the exemplary embodiment shown, internal combustion engine 10 comprises four cylinders 11 , 12 , 13 , 14 , but any other number of cylinders is also possible. Fuel is supplied via fuel system 20 and injected into cylinders 11 , 12 , 13 , 14 via corresponding injection valves 21 .

[0031] Air is supplied to the cylinders 11 , 12 , 13 , 14 via the air supply system 30 , wherein an intake valve 31 is provided for each of the cylinders 11 , 12 , 13 , 14 . Combustion exhaust gases are discharged from cylinders 11 , 12 , 13 , 14 via exhaust valves 41 and are output via exhaust system 40 . Arra...

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Abstract

The invention relates to a method for operating an internal combustion engine comprising at least two cylinders in at least two modes of operation, all cylinders being fired in a first mode of operation and only some cylinders being fired in a second mode of operation. In said method, an actual cumulative lambda value of the internal combustion engine is adjusted to a desired cumulative lambda value using a lambda controller by adjusting the amount of fuel and / or air delivered to the fired cylinders. When switching from the first mode of operation to the second one, a pilot control value is fed to the lambda controller, said pilot control value compensating for a change in the actual cumulative lambda value that occurs if the mode of operation is switched without feeding a pilot control value.

Description

technical field [0001] The invention relates to a method for operating an internal combustion engine and a computing unit for carrying out the method. Background technique [0002] For so-called homogeneous operation in Otto engines, the air / fuel ratio is regulated by a lambda regulator in such a way that the average value of the lambda values ​​of all cylinders is λ=1.0. This makes it possible to achieve low-exhaust gas operation with conventional three-way catalytic converters, which are known to have their greatest effectiveness with stoichiometric combustion. [0003] Due to metering tolerances and cylinder-individual air / filling differences, for example due to system tolerances, the lambda values ​​in the individual cylinders of an internal combustion engine can differ from one another despite identical actuation. The combined lambda value of the individual cylinder values ​​measured in the exhaust gas, which is also referred to below as the total actual lambda value, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/14F02D41/00
CPCF02D41/0087F02D41/1401F02D2041/141
Inventor W.蒂伊贝A.鲁普
Owner ROBERT BOSCH GMBH
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