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Method and motor controll unit

A motor control and pre-control technology, which is applied in electrical control, engine control, fuel injection control, etc., can solve the problems of inaccuracy and slow matching, and achieve the effect of precise triggering and precise pre-control combination characteristic curve

Active Publication Date: 2012-05-30
CONTINENTAL AUTOMOTIVE GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Matching is slow and imprecise by filtering measurement data that is not in stable working conditions and that are not near support points

Method used

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  • Method and motor controll unit
  • Method and motor controll unit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] Figure 1A Shows a rated pressure change curve 10 in a rail of a common rail system with a pressure regulating valve and a pressure change curve 12 measured in a test bench. The pre-control combination characteristics of the pressure regulating valve are controlled according to the prior art curve. On the abscissa, the time t in seconds s is plotted, and on the ordinate, the pressure p in MPa is plotted. In the common rail system, a stable regulator is provided, which ensures that the system approaches the operating point accordingly. In the steady state, in this resolution, there is almost no difference between the rated pressure and the measured pressure in the rail. Under transient conditions, the deviation between the rated pressure 10 and the measured pressure 12 can be seen.

[0026] Figure 1B Right Figure 1A The measured pressure profile shown in shows the distribution of the control deviation dp between the measured pressure 12 and the setpoint pressure 10. The ...

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Abstract

A method for approximating a stored pilot control map of a pressure control valve of a common-rail pump to the effective of pilot control map of the pressure control valve is presented. The stored pilot control map forms a desired pressure in the rail on a control current of the pressure control valve. The method includes the following method steps A) measurement of the pressure in the rail; B) determination of the control current of the pressure control valve; and C) adaptation of the stored pilot control map by a regression process that includes the pressure measured in step A) and control current measured in step B). In the course of a test run lasting 120 seconds (s) the control deviations (dp) of the desired pressure from the actual pressure in the pressure control valve could be substantially reduced.

Description

Technical field [0001] The invention relates to a method for making the stored pre-control combination characteristic curve of a pressure regulating valve of a common rail pump approach the actual pre-control combination characteristic curve of the pressure regulating valve. Background technique [0002] From DE 44 18 731 A1, a combined characteristic curve is known for controlling / regulating processes in automobiles. Here, the combined characteristic curve is spread by the operating parameters of the corresponding process and is represented by a certain number of support points. In the corresponding control instrument, for each support point, information about the value of the combined characteristic curve at the position of the support point is set. [0003] In a common rail system, the system pressure in the rail is usually regulated by a pressure regulating valve. The pressure regulating valve ensures that the pressure can be adjusted accurately enough in stable operation. F...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/30
CPCF02D41/3863F02D41/2477F02D41/1406F02D2041/141F02D41/2464Y10T70/5212Y10T70/5257
Inventor F·博克塞尼尤斯C·克勒塞
Owner CONTINENTAL AUTOMOTIVE GMBH
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