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Control method of variable geometry turbocharger (VGT) nozzle ring actuator

A control method and nozzle ring technology, applied in the direction of fuel injection control, electrical control, engine control, etc., can solve the problems that cannot meet the needs of multiple modes of the engine, engine failure, etc., to meet different functional requirements and reduce complexity The effect of reducing the workload of calibration

Active Publication Date: 2016-07-06
WEICHAI POWER CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is: the existing VGT actuator has only one set of maximum and minimum openings that can be calibrated, which cannot meet the requirements of

Method used

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  • Control method of variable geometry turbocharger (VGT) nozzle ring actuator
  • Control method of variable geometry turbocharger (VGT) nozzle ring actuator
  • Control method of variable geometry turbocharger (VGT) nozzle ring actuator

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Embodiment Construction

[0025] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientation or positional relationship indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplified description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as limiting the present invention. In addition, the terms "first", "second" They are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clear...

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Abstract

The invention relates to the technical field of automobiles, particularly to a control method of a variable geometry turbocharger (VGT) nozzle ring actuator. The control method of the VGT nozzle ring actuator provided by the invention comprises the steps that firstly full open and full close mechanical stop positions of a VGT nozzle ring are determined through self learning; then an electronic control unit (ECU) sends an engine mode demand signal to a VGT electronic actuator; and the intervals between the full open and full close mechanical stop positions of the nozzle ring and calibrated full open and full close positions of the ECU are adjusted according to the different working modes of the engine. According to the control method, the VGT actuator performs mode selection according to a mode demand command sent by an engine ECU, the full open and full close positions of different modes of the nozzle ring can be adjusted through the VGT electronic actuator, the operating range of the VGT nozzle ring is flexibly controlled, the requirements of the engine in the aspects such as supercharge pressure responsiveness and supercharger reliability protection are met through VGT parts, and the performances of the supercharger are exerted to the fullest.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a method for controlling a nozzle ring actuator of a variable-section supercharger. Background technique [0002] At present, as the implementation of Euro VI emission regulations is approaching, the regulations require lower and lower limit values ​​for nitrogen oxides (NOx) and particulates (PM) in engine exhaust gas. EGR (exhaust gas recirculation) + VGT (variable cross-section supercharger) + DOC (DieselOxidationCatalyst, oxidation catalytic converter) + DPF (DieselParticulateFilter, diesel particulate filter) + SCR (SelectiveCatalyticReduction, selective catalytic reduction) VGT in the technical route The application of DPF is very important, not only can it provide enough EGR driving pressure difference to meet the higher EGR rate to reduce NOx content, but also can improve the engine exhaust temperature by improving the blade angle to control the intake air during DPF ...

Claims

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Application Information

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IPC IPC(8): F02D41/24F02D23/00
CPCF02D23/00F02D41/2451Y02T10/12
Inventor 张广西代子阳钟跃兰姚旺栾军山
Owner WEICHAI POWER CO LTD
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