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Method for thermal protection of an internal combustion engine of a motor vehicle and corresponding engine computer

A technology of fuel injection and injection mechanism, which is applied in the directions of fuel injection control, fuel injection device, machine/engine, etc., and can solve problems such as no disclosure.

Inactive Publication Date: 2016-06-22
MOTOREN UND TURBINEN UNION MUNCHEN GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In contrast, there has hitherto been no known possibility of implementing a nozzle-individual diagnosis of the individual nozzles of the internal combustion engine in a simple and reliable manner in the sense of so-called on-board diagnostics.

Method used

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  • Method for thermal protection of an internal combustion engine of a motor vehicle and corresponding engine computer
  • Method for thermal protection of an internal combustion engine of a motor vehicle and corresponding engine computer
  • Method for thermal protection of an internal combustion engine of a motor vehicle and corresponding engine computer

Examples

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Embodiment Construction

[0071] figure 1 A schematic representation of an exemplary embodiment of internal combustion engine 1 is shown. The internal combustion engine has a fuel injection system 3 with a plurality of nozzles, of which only one nozzle 5 is shown here for simplicity of illustration. The nozzle 5 has a single accumulator 7 . In addition, a metering valve (not shown here) arranged downstream of the individual accumulator 7 is preferably integrated into the injection nozzle 5 , which prevents an excessively high fuel quantity from being dispensed into the assigned valves of the internal combustion engine 1 . Inside the cylinder of the nozzle 5.

[0072] A pressure sensor 9 is provided, which is arranged here on the nozzle 5 in such a way that the pressure in the individual accumulator 7 can be detected by means of the pressure sensor 9 .

[0073] A controller 11 is provided operatively connected to a pressure sensor 9 for detecting the pressure in said single reservoir 7 . The ...

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PUM

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Abstract

The invention relates to a method for the injector-specific diagnosis of a fuel injection device (3) of an internal combustion engine (1), comprising the following steps: detecting a pressure progression (D) in an individual accumulator (7) of an injector (5) in a time-resolved manner; evaluating the detected pressure progression (D); determining if there is a fault state of the injection device (3) in the region of the injector (5) on the basis of the detected and evaluated pressure progression (D); and identifying the fault state on the basis of the detected and evaluated pressure progression (D).

Description

technical field [0001] The invention relates to a method for nozzle-individual diagnosis of a fuel injection system of an internal combustion engine according to claim 1 and to an internal combustion engine according to the preamble of claim 9 . Background technique [0002] German publication DE 10 2009 002 793 A1 discloses a method for controlling and / or regulating an internal combustion engine with a common rail fuel injection system, within the scope of which the pressure in the individual accumulators of the nozzles is detected. The pressure is available for controlling the internal combustion engine. In particular, it is provided here that the course of the main injection is controlled and / or regulated by means of individual accumulator pressure measurements. Likewise, the course of the pre-injection and / or post-injection can be controlled and / or adjusted accordingly. In contrast, there has hitherto been no known possibility of implementing a nozzle-individual diagno...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/22F02D41/38F02M63/02
CPCF02D41/221F02D41/3809F02D2041/224F02D2200/0602F02D2200/0618F02M65/003F02M65/00F02M65/001
Inventor M.瓦尔德A.梅尔F.施万茨A.伯恩哈德C.沃尔夫
Owner MOTOREN UND TURBINEN UNION MUNCHEN GMBH