Fuel removal method for an internal combustion engine

A technology for internal combustion engines and fuels, applied in the direction of internal combustion piston engines, combustion engines, engine lubrication, etc., can solve problems such as insufficient preparation of mixtures, insufficient preheating stages, etc.

Active Publication Date: 2018-06-12
DR ING H C F PORSCHE AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Dilution of the lubricant can have various causes, such as frequent cold starts and short trips, insufficient preparation of the mixture, insufficient warm-up phase in combination with start-stop operation or electric operation in the case of hybrid vehicles

Method used

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Embodiment Construction

[0025] Further advantages, features and details of the invention will become apparent from the following description of a preferred illustrative embodiment. The features and combinations of features mentioned in the above description can be used not only in the respectively indicated combination but also in other combinations or on their own without exceeding the scope of the present invention.

[0026] In one illustrative embodiment, an internal combustion engine in the form of an eight cylinder engine is indicated. The internal combustion engine has a lubricant circuit which contains lubricant in the form of lubricating oil. Furthermore, closed-loop and open-loop control systems for setting engine operating data are assigned to the internal combustion engine. The closed-loop and open-loop control systems have various characteristic curves in which engine characteristic data or characteristic values ​​are stored according to various dependencies among one another. Thus, for...

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Abstract

A fuel removal method is for an internal combustion engine that has a closed- and open-loop control system and a lubricant circuit containing a lubricant. The closed- and open-loop control system has characteristic values for operation of the internal combustion engine. The method includes carrying out a load point shift starting from a first operating point of the internal combustion engine to a second operating point of the internal combustion engine with the aid of the closed- and open-loop control system. The load point shift is carried out when a fuel characteristic value, which characterizes a fuel quantity formed in the lubricant, is greater than or equal to a fuel threshold value. The second operating point having a second scavenging gradient which is greater than a first scavenging gradient of the first operating point.

Description

technical field [0001] The invention relates to a fuel removal method for an internal combustion engine. Background technique [0002] The internal combustion engine has a lubricant circuit for supplying lubricant to move the components of the internal combustion engine. The lubricant circuit is a circuit that is not completely sealed against disturbances. Thus, fuel can enter the lubricant, eg via the combustion chamber of the internal combustion engine. [0003] The lubricant, usually lubricating oil, flows through the lubricant circuit during the operating cycles of the internal combustion engine. During this process, the viscosity of the lubricant changes. The consequence of the change in viscosity is that the lubricant no longer has its original load-bearing capacity and thus no longer supplies the corresponding components in the required manner. [0004] In addition to the usual aging of the lubricant due to deposits, wear and / or introduction of soot, dilution of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/04
CPCF01M2011/14F02B25/145F02D13/0261F02D2041/001F02D2250/11Y02T10/12
Inventor M·西茨勒T·劳纳
Owner DR ING H C F PORSCHE AG
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