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Determining outgassing of a fuel from a lubricant within an internal combustion engine and lambda value adaptation on the basis of the determined outgassing of fuel

A technology for internal combustion engines and lubricants, which is applied in the field of fuel degassing of lubricants and internal combustion engines, and can solve the problem of high risk of engine flameout

Active Publication Date: 2013-07-03
CONTINENTAL AUTOMOTIVE GMBH
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  • Abstract
  • Description
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Problems solved by technology

Here, the risk of the engine stalling is particularly high when the engine is idling or when the engine transitions from higher speeds to idling

Method used

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  • Determining outgassing of a fuel from a lubricant within an internal combustion engine and lambda value adaptation on the basis of the determined outgassing of fuel
  • Determining outgassing of a fuel from a lubricant within an internal combustion engine and lambda value adaptation on the basis of the determined outgassing of fuel
  • Determining outgassing of a fuel from a lubricant within an internal combustion engine and lambda value adaptation on the basis of the determined outgassing of fuel

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Embodiment Construction

[0057] It should be pointed out that the implementation form described below only represents a limited selection of possible implementation variants of the present invention.

[0058] According to the embodiment described here, the active strategy is applied in order to deal with the risk of engine stalling or the risk of misdiagnosis in fuel diagnosis, and the passive strategy is applied if necessary. The closing of a controllable valve that can be used to set the flow intensity of the scavenging air flow through the crankcase of the internal combustion engine or the activation of the lambda adaptation as a response to fuel degassing is implemented here in connection with the risk assessment. The active strategy is always preferably applied as much as possible, because the active strategy is allowed to execute the lambda that at least partially compensates for fuel degassing already before the start of the idling phase of the internal combustion engine, or at least at the latest ...

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Abstract

A method for determining the quantity of outgassing of a fuel from a lubricant which is located in a housing of an internal combustion engine in an intake section of the internal combustion engine is described. The method comprises (a) setting a first coil current through the housing, (b) measuring a first output value of a lambda controller of the internal combustion engine, (c) setting a second coil current through the housing, wherein the second coil current has a different current strength compared to the first coil current, (d) measuring a second output value of the lambda controller of the internal combustion engine and (e) determining the quantity of outgassing of the fuel on the basis of the measured first output value and the measured second output value. In addition, a method is described for adapting a lambda value for a fuel / air mixture which is to be burnt in an internal combustion engine during a lower load range. The lambda value adaptation method comprises the above-mentioned method of determining the quantity of outgassing of a fuel. In addition, an internal combustion engine for a motor vehicle which can carry out the above-mentioned methods is described.

Description

Technical field [0001] The present invention generally relates to the technical field of lambda adjustment in internal combustion engines. The invention relates in particular to a method for determining the amount of fuel degassing from a lubricant in the housing of an internal combustion engine into the intake pipe section of the internal combustion engine. In addition, the invention relates to a method for adapting the lambda value of a fuel / air mixture to be burned in an internal combustion engine during a low load range and in particular during idling. Furthermore, the invention relates to an internal combustion engine with a control device, which is set up to execute the above-mentioned method. Background technique [0002] Modern spark ignition engines (Ottomotors) (especially direct injection engines) exhibit increased fuel input into the oil circuit of the crankcase. The proportion of fuel input (Anteil) will be further increased in the future, because more and more eth...

Claims

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Application Information

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IPC IPC(8): F02D41/14F02M25/06F02D41/00F01M13/00F02D41/04
CPCF01M13/00F02D41/0025F02D41/047F02D41/1454F02D2250/08F02D2250/11F02M25/06F02D41/04F02D41/14F02D41/003
Inventor L.尼尔松S.维赫弗J-R.伦克
Owner CONTINENTAL AUTOMOTIVE GMBH
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