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Method for controlling an internal combustion engine

A technology of internal combustion engine and controller, applied in the direction of internal combustion piston engine, electrical control, engine control, etc., can solve the problems of clear separation effect and achieve the effect of compensating aging deviation and compensating the tolerance of new components

Inactive Publication Date: 2008-12-24
ROBERT BOSCH GMBH
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Problems solved by technology

In tests carried out with the method disclosed from DE 10305656 it was shown that the effects of several successive pre-injections cannot be clearly separated from one another in the structure-borne sound signal
The reason for this is that multiple pre-injections are often fired in a very narrow angular region, so that their effects on cylinder pressure and especially on solid-state sounds cannot be clearly separated from each other

Method used

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  • Method for controlling an internal combustion engine
  • Method for controlling an internal combustion engine
  • Method for controlling an internal combustion engine

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Embodiment Construction

[0025] Fig. 1 shows in detail the structure with at least one combustion chamber 12, injector 14, fuel pressure accumulator 15, combustion characteristic sensor 16 and / or 18, fuel pressure sensor 19, rotating synchronously with the working cycle of internal combustion engine 10 Angle sensor 20 on component 22 , driver desire sensor 21 and control unit 24 of internal combustion engine 10 . Combustion chamber 12 is movably sealed by piston 26 . The piston is connected to the structural component 22 via a crankshaft drive 28 . Such a structural component 22 is non-rotatably connected to the crankshaft of the internal combustion engine. In another variant, however, the component can also be connected, for example, to a camshaft of internal combustion engine 10 . Of course, the actual internal combustion engine 10 also has further components, such as gas exchange valves and associated actuators for controlling the gas exchange of the combustion chamber 12 . These components are ...

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Abstract

The invention relates to a method for controlling an internal combustion engine (10) comprising at least one combustion chamber (12) into which fuel for combustion is injected by way of at least one first pilot injection (VE1) and a main injection (HE). According to said method, combustion features (VM_B) depending on an injected amount of fuel are detected, and an effect of the amount of fuel injected with the first pilot injection (VE1) is determined from the detected combustion features (VM_B). The method is characterized in that an effect of a second pilot injection (VE2) is determined from a comparison of combustion features (VM_VE1_ist, VM_VE12_ist) that were determined with activated and deactivated second pilot injection. The invention also relates to a control device which controls the method.

Description

technical field [0001] The invention relates to a method for controlling an internal combustion engine having at least one combustion chamber, injecting fuel for combustion into the combustion chamber by means of at least a first pilot injection and a main injection, detecting combustion characteristics as a function of the injected fuel quantity, And the effect of the first pilot injection is ascertained from the detected combustion characteristics. Furthermore, the invention relates to a controller for carrying out the method according to the preamble of claim 10 . Background technique [0002] DE 103 05 656 A discloses such a method. According to this document, the signals of structure-borne sound sensors coupled to the internal combustion engine are used as combustion characteristics to describe a simple relationship between noise emissions and the pre-injected fuel quantity. In order to obtain the injected fuel quantity, the signal of the structure-borne sound sensor ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/40F02D35/02
CPCF02D35/023F02D35/028F02D41/402F02D41/403F02D2041/1432F02D2200/025Y02T10/40F02D35/02F02D41/40
Inventor J·达米茨M·舒勒C·马德M·克斯勒V·多特尔A·西弗特
Owner ROBERT BOSCH GMBH
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