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A control method and system for a turbocharger, based on position sensor learning

A technology for controlling equipment and control methods, which is applied in the direction of electrical control, mechanical equipment, non-electrical control, etc., and can solve problems such as return value deviation and accuracy reduction

Active Publication Date: 2010-01-06
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] As the sensor ages during the life cycle of the equipment to which it is associated, its accuracy decreases and its return value includes deviations when compared to the nominal characteristic curve

Method used

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  • A control method and system for a turbocharger, based on position sensor learning
  • A control method and system for a turbocharger, based on position sensor learning
  • A control method and system for a turbocharger, based on position sensor learning

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Embodiment Construction

[0012] refer to figure 1 , a brief description of a control system for a fluid control device, in particular for an internal combustion engine.

[0013] In an exemplary embodiment of the fluid control device, a variable geometry turbocharger (VGT) 10 is considered here. A variable geometry turbocharger has adjustable deflector vanes adapted to adopt multiple operating positions for continuously varying the clearance through which the exhaust gas flows through to reach the turbine of the turbocharger, thereby controlling the flow through the turbine. Air velocity.

[0014] The control system comprises a position sensor 12 , such as a vane angular position sensor, arranged for continuously detecting the operating position of the variable turbine geometry of the turbocharger 10 . The sensor 12 comprises a converter portion adapted to convert a physical entity value representative of the angular position of the deflected blade into an electrical parameter value, and detection me...

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PUM

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Abstract

The invention discloses a control method of a fluid control device 10 such as a turbocharger, particularly for an internal combustion engine equipped with a position sensor 12 for measuring the position of the variable geometry turbocharger blades. The position sensor has a nominal characteristic curve (A) representative of a predetermined relationship between an admissible range of position values and a corresponding range of return electric signal values. The method comprises the steps of: determining an offset between a returned signal related to at least one defined position of the device 10 and an expected signal related to said defined position of the device according to the nominal characteristic curve (A); estimating an updated characteristic curve (B) of the sensor by applying said offset to the nominal characteristic curve (A); and applying a predetermined control strategy of the fluid control device 10 according to the updated characteristic curve (B).

Description

technical field [0001] The present invention relates to the control of the operating position of a fluid control device used in an internal combustion engine of a motor vehicle, in particular a variable geometry turbocharger, and in particular to the operation of a fluid control device with operating characteristics different from the nominal operating characteristics Position control. [0002] More specifically, the present invention relates to a learning method for a position sensor of a fluid control device adapted to employ multiple operating positions, the sensor comprising transducer means adapted to convert a value of a physical entity indicative of the position of the device into a value of an electrical parameter and detection means of said electrical parameter adapted to output an electrical signal indicative of said position, wherein said sensor has a predetermined distance between a value indicative of an allowable range of said physical entity and a return value o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02B37/24F01D17/16
CPCF02D41/2474F02B39/00F02D41/0007Y02T10/144F02B37/24Y02T10/12F02D41/04F02D39/00
Inventor 安德烈亚斯·冈纳森西莫内·巴贝罗龙尼·马格努森南多·韦尼蒂利
Owner GM GLOBAL TECH OPERATIONS LLC
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