CN112627970B - Voltage calibration process and system for opening position of VNT (gas-controlled valve) of turbocharger - Google Patents
Voltage calibration process and system for opening position of VNT (gas-controlled valve) of turbocharger Download PDFInfo
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- CN112627970B CN112627970B CN202011550377.6A CN202011550377A CN112627970B CN 112627970 B CN112627970 B CN 112627970B CN 202011550377 A CN202011550377 A CN 202011550377A CN 112627970 B CN112627970 B CN 112627970B
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- control valve
- pneumatic control
- point
- vnt
- turbocharger
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
- F02B37/12—Control of the pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D17/00—Regulating or controlling by varying flow
- F01D17/10—Final actuators
- F01D17/12—Final actuators arranged in stator parts
- F01D17/14—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits
- F01D17/141—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of shiftable members or valves obturating part of the flow path
- F01D17/145—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of shiftable members or valves obturating part of the flow path by means of valves, e.g. for steam turbines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
- F01D21/003—Arrangements for testing or measuring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
- F02B37/12—Control of the pumps
- F02B37/22—Control of the pumps by varying cross-section of exhaust passages or air passages, e.g. by throttling turbine inlets or outlets or by varying effective number of guide conduits
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Supercharger (AREA)
Abstract
The invention discloses a voltage calibration process and a system for the opening position of a VNT (VNT) pneumatic control valve of a turbocharger, wherein the process comprises the following steps: controlling a pneumatic control valve of the complete machine of the supercharger to run to a set position point by using a pressure controller; writing a voltage value at a first position point by using calibration software; adjusting a pressure controller to control the pneumatic driving pneumatic control valve to a next position, namely a flow point, and writing a corresponding voltage value; adjusting the air pressure to a terminal position, namely a maximum flow point, and writing a corresponding voltage value; and finishing calibration, re-driving the pneumatic control valve from the first position point to the end point position, detecting whether the output value of the corresponding point meets the requirement, if not, erasing data by software, and re-calibrating until the requirement is met. According to the invention, after the pneumatic control valve position signal is written in the complete machine, the movement of the valve is arc-shaped rather than vertical load, at the moment, the relationship between the position voltage signal and the opening degree is more accurate, the signal tolerance is less than 0.1V, and the ECU control is more facilitated.
Description
Technical Field
The invention relates to the field of turbochargers, in particular to a voltage calibration process and a voltage calibration system for the opening position of a VNT (gas-operated valve) of a turbocharger.
Background
In order to reduce the fuel consumption of the vehicle and improve the dynamic performance of the vehicle, a turbocharger is generally used to improve the power of the engine. A Variable Nozzle (VNT) turbocharger is one type of turbocharger, and is currently widely used. However, in the prior art, in the case of a turbocharger variable nozzle, a hall position sensor/pneumatic control actuator valve, the writing of the voltage signal with respect to the position is completed in a supplier factory, the pneumatic control valve voltage writing is not at a load angle (vertical), and when the pneumatic control valve completing the voltage writing is assembled to the complete machine, the final actual position/voltage output tolerance exceeds 0.3V due to the accumulation of manufacturing tolerances, and the tolerance value exceeds the allowable engine signal tolerance range (0.12V).
The above problems are urgently needed to be solved.
Disclosure of Invention
The invention aims to solve the problems mentioned in the background technology part by using a voltage calibration process and a voltage calibration system for the opening position of a VNT pneumatic control valve of a turbocharger.
In order to achieve the purpose, the invention adopts the following technical scheme:
a voltage calibration process for the opening position of a VNT pneumatic control valve of a turbocharger comprises the following steps:
s101, controlling a pneumatic control valve of the whole supercharger to operate to a set position point by using a pressure controller;
s102, writing a voltage value at a first position point by using calibration software;
s103, adjusting the pressure controller to control the pneumatic driving pneumatic control valve to the next position, namely a flow point, and writing a corresponding voltage value;
s104, adjusting the air pressure to a final position, namely a maximum flow point, and writing a corresponding voltage value;
and S105, completing calibration, re-driving the pneumatic control valve from the first position point to the end point position, detecting whether the output value of the corresponding point meets the requirement, if not, erasing data by software, and re-calibrating until the output value meets the requirement.
Specifically, the step S101 specifically includes: and controlling the complete machine pneumatic control valve of the supercharger to run to a set position point by using a pressure controller, wherein the position point is determined and maintained by a complete machine flow tester.
Specifically, the step S103 specifically includes: and regulating the pressure controller to control the pneumatic drive pneumatic control valve to the next position, namely a flow point, writing a corresponding voltage value, and sequentially writing 28 points at most.
In particular, the data required to be collected by the equipment in the turbocharger VNT pneumatic control valve opening position voltage calibration process includes, but is not limited to: firstly, air pressure parameters: positive and/or negative pressure; secondly, displacement parameters: the action distance of the actuator; and thirdly, a voltage/flow curve of the Hall position sensor.
The invention also discloses a voltage calibration system for the opening position of the VNT pneumatic control valve of the turbocharger, which adopts the voltage calibration process for the opening position of the VNT pneumatic control valve of the turbocharger, and the system comprises: the device comprises a main control computer, a pressure controller, a pneumatic control valve, a programming board, a power supply, a vacuum pump, a pressure reducing valve and a high-pressure air source; one end of the master control computer is connected with the pressure controller, and the other end of the master control computer is connected with the programming board; the control end of the pressure controller is connected with the pneumatic control valve, the pneumatic control valve is arranged in the complete machine of the turbocharger, and the pneumatic control valve is connected with the programming board; the vacuum pump is connected with the pressure controller; one end of the pressure reducing valve is connected with the high-pressure air source, and the other end of the pressure reducing valve is connected with the pressure controller; the power supply is connected with the programming board.
According to the voltage calibration process and system for the opening position of the VNT pneumatic control valve of the turbocharger, after the whole machine is assembled, the position signal of the pneumatic control valve is written, the movement of the valve is arc-shaped movement instead of vertical load, at the moment, the relation between the position voltage signal and the opening is more accurate, the signal tolerance is smaller than 0.1V, and the control of an ECU is facilitated.
Drawings
Fig. 1 is a schematic flow chart of a voltage calibration process for an opening position of a VNT pneumatic control valve of a turbocharger according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a voltage calibration system for an opening position of a VNT pneumatic control valve of a turbocharger according to an embodiment of the present invention.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete. It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Example one
Referring to fig. 1, fig. 1 is a schematic diagram of a voltage calibration process for an opening position of a VNT pneumatic control valve of a turbocharger according to an embodiment of the present invention.
The voltage calibration process for the opening position of the VNT pneumatic control valve of the turbocharger in the embodiment comprises the following steps:
and S101, controlling the complete machine pneumatic control valve of the supercharger to run to a set position point by using a pressure controller.
And S102, writing a voltage value at a first position point by using calibration software.
And S103, regulating the pressure controller to control the air pressure driving air control valve to a next position, namely a flow point, and writing a corresponding voltage value.
And S104, adjusting the air pressure to a final position, namely a maximum flow point, and writing a corresponding voltage value.
And S105, completing calibration, re-driving the pneumatic control valve from the first position point to the end point position, detecting whether the output value of the corresponding point meets the requirement, if not, erasing data by software, and re-calibrating until the output value meets the requirement.
Specifically, in this example, the step S101 specifically includes: and controlling the complete machine pneumatic control valve of the supercharger to run to a set position point by using a pressure controller, wherein the position point is determined and maintained by a complete machine flow tester.
Specifically, in this example, the step S103 specifically includes: and regulating the pressure controller to control the pneumatic drive pneumatic control valve to the next position, namely a flow point, and writing a corresponding voltage value, wherein at most 28 points can be written in sequence.
Specifically, in this example, the data that needs to be collected by the device in the turbocharger VNT pneumatic control valve opening position voltage calibration process includes, but is not limited to: firstly, air pressure parameters: positive and/or negative pressure (-800 to 3500 mBar); secondly, displacement parameters: the action distance of the actuator (0-22 mm for advancing and retreating); and thirdly, a voltage/flow curve of the Hall position sensor.
Compared with the traditional method that only 2 position points (a starting point and an end point) are calibrated, the middle is in linear transition, in the embodiment, signals are not written into the position sensor bypass valve provided by a supplier temporarily, the calibration is carried out after the complete machine is assembled, and finally, at least 14 position signals are calibrated by the complete machine test bench, so that the manufacturing error accumulation of the nozzle ring, the connecting rod, the spring and the diaphragm is corrected, the precision of a product output curve is higher, the tolerance of the obtained flow (pressure)/voltage output curve is less than 0.1V, and the ECU control is facilitated.
Example two
The embodiment discloses a turbocharger VNT pneumatic control valve opening position voltage calibration system adopting the turbocharger VNT pneumatic control valve opening position voltage calibration process provided in the first embodiment, the system includes: the device comprises a main control computer, a pressure controller, a pneumatic control valve, a programming board, a power supply, a vacuum pump, a pressure reducing valve and a high-pressure air source; one end of the master control computer is connected with the pressure controller, and the other end of the master control computer is connected with the programming board; the control end of the pressure controller is connected with the pneumatic control valve, the pneumatic control valve is arranged in the complete machine of the turbocharger, and the pneumatic control valve is connected with the programming board; the vacuum pump is connected with the pressure controller; one end of the pressure reducing valve is connected with the high-pressure air source, and the other end of the pressure reducing valve is connected with the pressure controller; the power supply is connected with the programming board. In this embodiment the power supply is a DC power supply.
When the pressure control device works, the pressure controller is used for controlling the whole pneumatic control valve of the supercharger to operate to a set position point, wherein the position point is determined and maintained by a whole flow tester; writing a voltage value at a first position point by using calibration software; adjusting a pressure controller to control the pneumatic drive pneumatic control valve to a next position, namely a flow point, and writing a corresponding voltage value, wherein 28 points can be written at most in sequence; adjusting the air pressure to a terminal position, namely a maximum flow point, and writing a corresponding voltage value; and finishing calibration, re-driving the pneumatic control valve from the first position point to the end point position, detecting whether the output value of the corresponding point meets the requirement, if not, erasing data by software, and re-calibrating until the requirement is met. In this example, the data that needs to be collected by the device in the turbocharger VNT pneumatic control valve opening position voltage calibration process includes, but is not limited to: firstly, air pressure parameters: positive and/or negative pressure (-800 to 3500 mBar); II, displacement parameters: the action distance of the actuator (0-22 mm for advancing and retreating); and thirdly, a voltage/flow curve of the Hall position sensor.
According to the technical scheme provided by the invention, after the position signal of the air control valve is written in the complete machine, the movement of the valve is arc-shaped rather than vertical load, at the moment, the relation between the position voltage signal and the opening degree is more accurate, the signal tolerance is less than 0.1V, and the ECU control is more facilitated.
It will be understood by those skilled in the art that all or part of the above embodiments may be implemented by hardware related to instructions of a computer program, and the program may be stored in a computer readable storage medium, and when executed, may include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a read-only memory or a random access memory.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (4)
1. A method for calibrating voltage of an opening position of a VNT pneumatic control valve of a turbocharger is characterized by comprising the following steps:
s101, controlling a pneumatic control valve of the whole supercharger to operate to a set position point by using a pressure controller;
s102, writing a voltage value at a first position point by using calibration software;
s103, adjusting the pressure controller to control the pneumatic driving pneumatic control valve to the next position, namely a flow point, and writing a corresponding voltage value;
s104, adjusting the air pressure to a final position, namely a maximum flow point, and writing a corresponding voltage value;
s105, completing calibration, re-driving the pneumatic control valve from the first position point to the end point position, detecting whether the output value of the corresponding point meets the requirement, if not, erasing data by software, and re-calibrating until the output value meets the requirement;
the step S103 specifically includes: and regulating the pressure controller to control the pneumatic drive pneumatic control valve to the next position, namely a flow point, writing a corresponding voltage value, and sequentially writing 28 points at most.
2. The method for calibrating the open position and the voltage of the VNT pneumatic control valve of the turbocharger according to claim 1, wherein the step S101 specifically comprises the following steps: and controlling the complete machine pneumatic control valve of the supercharger to run to a set position point by using a pressure controller, wherein the position point is determined and maintained by a complete machine flow tester.
3. The open position voltage calibration method of the VNT pneumatic control valve of the turbocharger according to one of claims 1 to 2, wherein the data required to be collected by the equipment in the method includes but is not limited to: firstly, air pressure parameters: positive and/or negative pressure; secondly, displacement parameters: the action distance of the actuator; and thirdly, a voltage/flow curve of the Hall position sensor.
4. A turbocharger VNT pneumatic control valve opening position voltage calibration system using the turbocharger VNT pneumatic control valve opening position voltage calibration method according to any one of claims 1 to 3, characterized by comprising: the device comprises a main control computer, a pressure controller, a pneumatic control valve, a programming board, a power supply, a vacuum pump, a pressure reducing valve and a high-pressure air source; one end of the master control computer is connected with the pressure controller, and the other end of the master control computer is connected with the programming board; the control end of the pressure controller is connected with the pneumatic control valve, the pneumatic control valve is arranged in the complete machine of the turbocharger, and the pneumatic control valve is connected with the programming board; the vacuum pump is connected with the pressure controller; one end of the pressure reducing valve is connected with the high-pressure air source, and the other end of the pressure reducing valve is connected with the pressure controller; the power supply is connected with the programming board.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011550377.6A CN112627970B (en) | 2020-12-24 | 2020-12-24 | Voltage calibration process and system for opening position of VNT (gas-controlled valve) of turbocharger |
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| CN202011550377.6A CN112627970B (en) | 2020-12-24 | 2020-12-24 | Voltage calibration process and system for opening position of VNT (gas-controlled valve) of turbocharger |
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| CN112627970A CN112627970A (en) | 2021-04-09 |
| CN112627970B true CN112627970B (en) | 2022-05-13 |
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| CN114439629B (en) * | 2022-04-11 | 2022-07-15 | 潍柴动力股份有限公司 | Method, device and equipment for adjusting opening degree of supercharger and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7269992B2 (en) * | 2005-06-15 | 2007-09-18 | Honeywell International Inc. | Magnet orientation and calibration for small package turbocharger speed sensor |
| GB0713951D0 (en) * | 2007-07-18 | 2007-08-29 | Cummins Turbo Tech Ltd | Calibration of an actuator for a variable geometry turbine |
| US7689376B2 (en) * | 2008-05-29 | 2010-03-30 | Honeywell International Inc | Method of calibrating an actuator system for a variable nozzle of a turbocharger |
| CN204314073U (en) * | 2014-12-08 | 2015-05-06 | 湖南天雁机械有限责任公司 | Variable-area turbocharger flow detection and caliberating device |
| CN104359680B (en) * | 2014-12-08 | 2017-06-06 | 湖南天雁机械有限责任公司 | Variable-area turbocharger flow detection and the method and device demarcated |
| CN104596757B (en) * | 2015-02-03 | 2017-04-05 | 萍乡市慧成精密机电有限公司 | Variable geometry turbine supercharger nozzle ring flow calibration method and experimental rig |
| KR102009272B1 (en) * | 2018-05-31 | 2019-08-09 | 현대위아 주식회사 | Wastegate Turbocharger Valve Control Method |
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