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Method for identifying faulty components of a fuel injection system

A fuel injection system and faulty component technology, applied in fuel injection control, combustion engines, internal combustion piston engines, etc., can solve problems such as sensor contamination, parameter or component deterioration, and injection system failure to provide

Active Publication Date: 2018-03-27
VTESCO TECH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, in known OBD systems, the problem arises that small injection quantities only cause small signal trips at available sensors (e.g. rail pressure sensors or lambda sensors)
The sensor may also be contaminated
[0006] Furthermore, in known OBD systems, the problem arises that the minimum injection quantity that can be applied by the injection system is generally subject to a lifetime-induced increase unless suitable countermeasures are taken
An aging injection system may not be able to provide the rated quantity because the parameters or components of the injection system have deteriorated

Method used

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  • Method for identifying faulty components of a fuel injection system
  • Method for identifying faulty components of a fuel injection system
  • Method for identifying faulty components of a fuel injection system

Examples

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Embodiment Construction

[0030] figure 1 A simplified diagram is shown to explain a method for identifying a faulty component of a fuel injection system.

[0031] Before the method starts, a benefit evaluation is first performed. This favorableness assessment used in normal operation of a motor vehicle includes the operation of performing a predetermined system diagnosis and checking the results thereof. These system diagnostics include, for example, cylinder balancing diagnostics, and diagnostics of the functional capabilities of sensors and actuators provided on components of the injection system.

[0032] In the case of using the claimed method in a workshop, this advantageous evaluation includes the operation of workshop personnel to eliminate certain faults, for example, faults on the vehicle wiring harness, leaks in the high-voltage system of the motor vehicle, and failures of inappropriate fuel types. filling.

[0033] If the performed favorable evaluation gives a positive result, a stable e...

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Abstract

The invention relates to a method for identifying faulty components of a fuel injection system, wherein a secondary injection is performed individually by each injector during a test routine, whereupon several predefined parameters of the fuel injection system are ascertained, and a combined assessment of the ascertained parameters is used to draw conclusions about whether or not components of thefuel injection system are faulty.

Description

technical field [0001] The invention relates to a method for detecting faulty components of a fuel injection system. Background technique [0002] Fuel injection systems for internal combustion engines must meet legal requirements related to on-board diagnostics (OBD). Relevant standards and laws related to this are, for example, UN / ECE R83 for Europe, and California Regulations (Title 13, 1968.2) for the California market. [0003] Temporary or continuous deviations of the fuel injection quantity from the optimum fuel injection quantity for the instantaneous operating point of the internal combustion engine must be able to be diagnosed quickly and reliably. This diagnostic capability must be maintained during the entire service life of a motor vehicle equipped with an internal combustion engine. If this were not the case, the emission of pollutants from motor vehicles would worsen and, in many cases, legal requirements would not be complied with. And these motor vehicles...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/00F02D41/14F02D41/22F02D41/40F02D41/24
CPCF02D41/008F02D41/1454F02D41/1495F02D41/1497F02D41/22F02D41/221F02D41/222F02D41/247F02D41/405F02D2041/224F02D2200/0614Y02T10/40F02D41/14F02D41/40
Inventor R.霍夫曼P.M.鲁泽T.加吉佐M.考舍
Owner VTESCO TECH GMBH