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Method and device for determining an operating characteristic of an injection system

A technology of injection system and operation characteristics, applied in the direction of fuel injection control, electrical control, combustion engine, etc., can solve problems such as difficulty in manufacturing tolerance injection quantity

Inactive Publication Date: 2013-03-27
CONTINENTAL AUTOMOTIVE GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the manufacturing tolerances of the individual components and the control mechanism of the injection system, it is difficult to achieve the predetermined injection quantity

Method used

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  • Method and device for determining an operating characteristic of an injection system
  • Method and device for determining an operating characteristic of an injection system
  • Method and device for determining an operating characteristic of an injection system

Examples

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Embodiment Construction

[0024] figure 1 An engine 1 is shown in one embodiment of the invention. The engine 1 includes an engine control unit ECU 10 , an injection system 30 , a supercharger 40 and an engine body 50 .

[0025] The injection system 30 is a common rail system. It comprises an accumulator 36 and four injectors 31 , 32 , 33 , 34 connected with the accumulator 36 .

[0026] The engine block 50 includes four cylinders 51 , 52 , 53 , 54 . Each cylinder 51 , 52 , 53 , 54 is assigned an injector 31 , 32 , 33 , 34 .

[0027] Connected to the engine block 50 is a supercharger 40 which may be driven by combustion gases flowing out of the cylinders 51, 52, 53, 54 and through which compressed air may be introduced into the cylinders 51, 52, 53, 54. in the combustion chamber. The supercharger 40 includes a supercharger measuring device 42 , which measures the rotational speed of a turbine of the supercharger 40 , not shown further here.

[0028] The ECU 10 includes an electronic circuit 11 , ...

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Abstract

In a method and a device for determining an operating characteristic of an injection system, to determine an operating characteristic (30) of an internal combustion engine (1) that is charged by a turbocharger (4), the method has the following steps: A) carrying out a pilot injection of fuel into a cylinder (51, 52, 53, 54) of the internal combustion engine using the injection system (30); B) determining an operating parameter of the turbocharger (40); C) determining an operating characteristic of the injection system (30) using the operating parameter of the turbocharger (40) previously determined.

Description

technical field [0001] The invention relates to a method for determining an operating characteristic of an injection system of an internal combustion engine and a control device for carrying out the method. Background technique [0002] In modern internal combustion engines, in order to obtain the best possible exhaust gas values, it is important to realize the predetermined fuel injection quantity precisely. Furthermore, in the case of multi-cylinder engines, the aim is to inject the same amount of fuel as possible into all cylinders in order to achieve the smoothest possible engine running. In this case, the injection pattern on which the injected fuel quantity is based should also be of the same type, ie the same number of pre-injections, main injections and post-injections per cylinder. For example, if the injection pattern per cylinder consists of only one main injection per working cycle, then for a predetermined operating point of the internal combustion engine it is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/00F02D41/24F02D41/40
CPCF02D41/40F02D41/405F02D41/0007Y02T10/44F02D41/2467F02D41/2438Y02T10/144Y02T10/12Y02T10/40F02D41/04F02D41/30F02D23/02F02D45/00
Inventor U·琼H·-P·拉布尔J·拉德齐基
Owner CONTINENTAL AUTOMOTIVE GMBH
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