Method and device for controlling a multicylinder internal combustion engine

An internal combustion engine, multi-cylinder technology, applied in the direction of internal combustion piston engine, electrical control, engine control, etc., can solve the problem of unstable operation of a single cylinder, and achieve the effect of ensuring the stability of regulation

Inactive Publication Date: 2006-07-05
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the output side, the control section influences the cylinder-specific injection times and thus the torque output share of the individual cylinders in such a way that the individual cylinders run unstable and the actual value approaches the setpoint value

Method used

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  • Method and device for controlling a multicylinder internal combustion engine
  • Method and device for controlling a multicylinder internal combustion engine

Examples

Experimental program
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Embodiment Construction

[0017] figure 1 Three graphs, represented by a common time axis (X-axis), illustrate a preferred embodiment of monitoring the effect of cylinder equalization control on a gasoline direct-injection engine with four cylinders. The values ​​assigned to the individual Y-axes were determined from experiments in which the internal combustion engine was operated at approximately 1.400 rpm in the stratified operating mode (15%).

[0018] The four curves K1 , K2 , K3 , K4 in the upper diagram represent the individual cylinder-specific angular acceleration values ​​K on the crankshaft of the internal combustion engine as Y values. The setpoint corresponding to the highest operating stability (control setpoint of the cylinder equalization control) should lie at the value K1=K2=K3=K4=0 for the definition of the selection. During the first 5 seconds of the time frame segment, the cylinder equalization control is set approximately at this ideal value. A value deviating from zero for at le...

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PUM

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Abstract

The invention relates to a method for controlling a multicylinder internal combustion engine. The cylinders are synchronised for adjusting the torques of the individual cylinders, said torques forming the total torque of the internal combustion engine. The cylinder synchronisation is checked for efficiency. At least one error signal that indicates a failure is generated when the cylinder synchronisation fails.

Description

technical field [0001] The invention relates to a method for controlling a multi-cylinder internal combustion engine, wherein a cylinder equalization control is carried out for equalizing the share of the torque of the individual cylinders with respect to the total torque of the internal combustion engine, wherein an effect monitoring for the cylinder equalization control and in the area of ​​the cylinder equalization control is carried out At least one fault signal indicating the presence of interference is generated when interference is present. Background technique [0002] In a method and a device of the type described above for controlling a multi-cylinder internal combustion engine, a cylinder balancing control is provided for compensating or equalizing the proportion of the individual cylinder torques to the total torque of the internal combustion engine. The internal combustion engine can be an Otto engine or a diesel engine, for example. Particularly desirable for ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/22F02D41/14F02D45/00F02D41/20
CPCF02D41/22F02D41/1498F02D2041/1409F02D2041/1422F02D2200/1015Y02T10/40
Inventor 斯特凡·乌尔
Owner ROBERT BOSCH GMBH
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