CN113531185A - Calibration method and device for temperature control ball valve for vehicle - Google Patents

Calibration method and device for temperature control ball valve for vehicle Download PDF

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Publication number
CN113531185A
CN113531185A CN202010311596.2A CN202010311596A CN113531185A CN 113531185 A CN113531185 A CN 113531185A CN 202010311596 A CN202010311596 A CN 202010311596A CN 113531185 A CN113531185 A CN 113531185A
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China
Prior art keywords
ball valve
dead center
temperature control
center position
temperature
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CN202010311596.2A
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CN113531185B (en
Inventor
段心林
林承伯
罗海鹏
董春艳
张旭
吴广权
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Guangzhou Automobile Group Co Ltd
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Guangzhou Automobile Group Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
    • F16K37/0025—Electrical or magnetic means
    • F16K37/0041—Electrical or magnetic means for measuring valve parameters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P2007/146—Controlling of coolant flow the coolant being liquid using valves
    • 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
    • Y02T10/40—Engine management systems

Abstract

The invention discloses a calibration method and a device for a temperature control ball valve for a vehicle, wherein when the vehicle is started, the temperature of an engine is obtained, the initial starting point and the initial ending point of the stroke of the temperature control ball valve are obtained, and the calibration process of the stroke of the temperature control ball valve is decomposed according to the temperature of the engine, so that the stroke of the temperature control ball valve can be calibrated only by controlling the temperature control ball valve to perform bottom dead center impact or top dead center impact and determining the current position of the temperature control ball valve when the vehicle is started every time, and the temperature control ball valve is not required to complete full stroke calibration including the top dead center impact and the bottom dead center impact, thereby reducing the rotation angle of the temperature control ball valve during stroke calibration every time, reducing the abrasion of a sealing element of a temperature control module, further reducing the influence of the stroke calibration on the service life of the temperature control module, and ensuring the service life of the temperature control module.

Description

Calibration method and device for temperature control ball valve for vehicle
Technical Field
The invention relates to the technical field of engine cooling systems, in particular to a method and a device for calibrating a temperature control ball valve for a vehicle.
Background
In the engine cooling system, a temperature control module drives a ball valve through a motor to cool an engine, the rotation angle of the ball valve is closely related to the control of the flow of cooling liquid, and the opening degree (rotation angle) of a ball valve is controlled to control the opening degree of a branch so as to distribute the flow of the cooling liquid in the branch as required. Under normal design, the starting point of the stroke of the ball valve is the position of 0% of the opening of the ball valve, the ball valve is completely closed at the moment, the rotating angle is 0 degree, and the branch is closed when the opening of the ball valve is staggered with the pipeline; the end point of the ball valve stroke is the position of 100% of the opening of the ball valve, the ball valve is fully opened at the moment, the rotating angle is 200 degrees, the opening of the ball valve is aligned with the pipeline, and the branch is fully opened to enable the cooling liquid to flow in.
In actual use, due to long-term movement of the ball valve, the angular position of the ball valve may deviate from the expected position, so that the expected cooling effect cannot be achieved, and the risk is generated. Thus, each time the vehicle is started, the ball valve needs to be self-learned to calibrate its travel to ensure that the actual angular position of the subsequent ball valve corresponds to the desired position.
However, in the prior art, at least one full-stroke rotation of the ball valve is required to be completed every time the ball valve is subjected to stroke calibration, that is, the ball valve needs to complete top dead center impact and bottom dead center impact, the one full-stroke rotation angle is about 200 degrees, 2000 ten thousand degrees of rotation needs to be added when the ball valve is calibrated for 10 ten thousand times in the service life of a vehicle, and excessive abrasion of a sealing element is caused by extra angle rotation, so that the service life of the temperature control module is shortened.
Disclosure of Invention
The invention provides a method and a device for calibrating a vehicle temperature control ball valve, which aim to solve the problem that in the prior art, when the stroke of the ball valve is calibrated, at least one full stroke needs to be completed, so that the rotating angle of the ball valve is too large, and the service life of a temperature control module is shortened.
A calibration method for a temperature-controlled ball valve for a vehicle comprises the following steps:
when a vehicle is started, acquiring the water temperature of an engine, and acquiring an initial starting point and an initial ending point of a stroke of a temperature control ball valve;
if the water temperature of the engine is lower than a first preset temperature, controlling the temperature control ball valve to impact a bottom dead center of the temperature control ball valve, and determining the current bottom dead center position;
calibrating the stroke of the temperature control ball valve according to the current bottom dead center position, the initial starting point and the initial ending point;
if the water temperature of the engine is higher than a second preset temperature, controlling the temperature control ball valve to impact the top dead center of the temperature control ball valve, and determining the current top dead center position;
calibrating the stroke of the temperature control ball valve according to the current top dead center position, the initial starting point and the initial ending point, wherein the second preset temperature is higher than the first preset temperature.
Further, the calibrating the stroke of the temperature-controlled ball valve according to the current bottom dead center position, the initial starting point and the initial ending point includes:
determining the original bottom dead center position of the temperature control ball valve according to the initial starting point and the control precision, and determining the original top dead center position of the temperature control ball valve according to the initial ending point and the control precision;
determining the original stroke width of the temperature control ball valve according to the original bottom dead center position and the original top dead center position;
and if the error between the current bottom dead center position and the original bottom dead center position is smaller than or equal to the control precision, determining a new starting point and a new ending point of the temperature control ball valve stroke according to the current bottom dead center position and the original stroke width.
Further, the method further comprises:
if the error between the current bottom dead center position and the original bottom dead center position is larger than the control precision, controlling the temperature control ball valve to impact the top dead center of the temperature control ball valve, and determining the current top dead center position;
determining whether the error between the stroke width between the current top dead center position and the current bottom dead center position and the original stroke width is smaller than the control precision;
and if the error between the stroke width between the current top dead center position and the current bottom dead center position and the original stroke width is smaller than the control precision, determining a new starting point and a new ending point of the temperature control ball valve stroke according to the current bottom dead center position and the current top dead center position.
Further, the calibrating the stroke of the temperature-controlled ball valve according to the current top dead center position, the initial starting point and the initial ending point includes:
determining the original bottom dead center position of the temperature control ball valve according to the initial starting point and the control precision, and determining the original top dead center position of the temperature control ball valve according to the initial ending point and the control precision;
determining the original stroke width of the temperature control ball valve according to the original bottom dead center position and the original top dead center position;
and if the error between the current top dead center position and the original top dead center position is smaller than or equal to the control precision, determining a new starting point and a new ending point of the temperature control ball valve stroke according to the current top dead center position and the original stroke width.
Further, the method further comprises:
if the error between the current top dead center position and the original top dead center position is larger than the control precision, controlling the temperature control ball valve to impact the bottom dead center of the temperature control ball valve, and determining the current bottom dead center position;
determining whether the error between the stroke width between the current top dead center position and the current bottom dead center position and the original stroke width is smaller than the control precision;
and if the error between the stroke width between the current top dead center position and the current bottom dead center position and the original stroke width is smaller than the control precision, determining a new starting point and a new ending point of the temperature control ball valve stroke according to the current bottom dead center position and the current top dead center position.
Further, said controlling said temperature controlled ball valve to strike a bottom dead center of said temperature controlled ball valve comprises:
determining a target rotation angle of the temperature control ball valve according to the flow of the cooling liquid required by the engine, and acquiring an actual current rotation angle of the temperature control ball valve;
if the target turning angle is smaller than the current turning angle, determining that the temperature control ball valve moves towards the initial starting point, and determining whether the difference between the target turning angle and the set control precision is smaller than the corresponding angle of the initial starting point;
if the difference between the target rotation angle and the set control precision is smaller than the angle corresponding to the initial starting point, controlling the temperature control ball valve to reduce the speed and impact the bottom dead center of the temperature control ball valve when the rotation angle is a first preset rotation angle, wherein the first preset rotation angle is the sum of the angle corresponding to the initial starting point and the control precision.
Further, said controlling said temperature controlled ball valve to impact an upper dead center of said temperature controlled ball valve comprises:
determining a target rotation angle of the temperature control ball valve according to the cooling requirement of the engine, and acquiring the actual current rotation angle of the temperature control ball valve;
if the target rotation angle is larger than the current rotation angle, determining that the temperature control ball valve moves towards the initial termination point, and determining whether the sum of the target rotation angle and the set control precision is larger than the corresponding angle of the initial termination point;
if the sum of the target rotation angle and the set control precision is larger than the angle corresponding to the initial termination point, controlling the temperature control ball valve to reduce the speed to impact the top dead center of the temperature control ball valve when a second preset rotation angle is obtained, wherein the second preset rotation angle is the difference between the angle corresponding to the initial termination point and the control precision.
Further, after the vehicle is turned off, the method comprises the following steps:
adjusting the rotation angle of the temperature control ball valve to a third preset angle so that the rotation angle of the temperature control ball valve can meet the cooling requirement of the engine when the vehicle is started next time and fails;
and determining the starting point and the ending point of the current travel of the temperature control ball valve as the initial starting point and the initial ending point of the travel of the temperature control ball valve when the vehicle is started next time.
A temperature control ball valve calibration device for a vehicle, comprising:
the system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring the water temperature of an engine when a vehicle is started and acquiring an initial starting point and an initial ending point of a stroke of a temperature control ball valve;
the first control module is used for controlling the temperature control ball valve to impact a bottom dead center of the temperature control ball valve and determining the position of the bottom dead center if the water temperature of the engine is lower than a first preset temperature;
the first calibration module is used for calibrating the stroke of the temperature control ball valve according to the current bottom dead center position, the initial starting point and the initial end point;
the second control module is used for controlling the temperature control ball valve to impact the top dead center of the temperature control ball valve and determining the current top dead center position if the water temperature of the engine is higher than a second preset temperature;
and the second calibration module is used for calibrating the stroke of the temperature control ball valve according to the current top dead center position, the initial starting point and the initial ending point, and the second preset temperature is greater than the first preset temperature.
The calibration device for the vehicle temperature-controlled ball valve comprises a memory, a processor and a determining machine program which is stored in the memory and can run on the processor, wherein the processor executes the determining machine program to realize the steps of the calibration method for the vehicle temperature-controlled ball valve.
A readable storage medium having stored thereon a determining machine program which, when executed by a processor, carries out the steps of the above-described method of calibrating a temperature-controlled ball valve for a vehicle.
In one scheme implemented by the calibration method and device for the vehicle temperature control ball valve, when a vehicle is started, the water temperature of an engine is obtained, and an initial starting point and an initial ending point of the stroke of the temperature control ball valve are obtained, if the water temperature of the engine is lower than a first preset temperature, the temperature control ball valve is controlled to impact a lower dead point of the temperature control ball valve, the current lower dead point position is determined, and then the stroke of the temperature control ball valve is calibrated according to the current lower dead point position, the initial starting point and the initial ending point; if the water temperature of the engine is higher than a second preset temperature, controlling the temperature control ball valve to impact the top dead center of the temperature control ball valve, determining the current top dead center position, and calibrating the stroke of the temperature control ball valve according to the current top dead center position, the initial starting point and the initial ending point, wherein the second preset temperature is higher than the first preset temperature; according to the invention, the calibration process of the stroke of the temperature control ball valve is decomposed according to the water temperature of the engine, and the stroke of the temperature control ball valve can be calibrated only by controlling the temperature control ball valve to perform bottom dead center impact or top dead center impact and determining the current position of the temperature control ball valve when a vehicle is started every time, and the temperature control ball valve is not required to complete full stroke calibration including top dead center impact and bottom dead center impact, so that the rotation angle of the temperature control ball valve during stroke calibration every time is reduced, the abrasion of a sealing element of a temperature control module is reduced, the influence of stroke calibration on the service life of the temperature control module is further reduced, and the service life of the temperature control module is ensured.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
FIG. 1 is a schematic flow chart illustrating a calibration method for a vehicle temperature-controlled ball valve according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating an implementation of step SA30 according to an embodiment of the present invention;
FIG. 3 is a schematic flow chart illustrating a calibration method for a vehicle temperature-controlled ball valve according to an embodiment of the present invention;
FIG. 4 is a flowchart illustrating an implementation of step SA30 according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a calibration device for a vehicle temperature-controlled ball valve according to an embodiment of the present invention;
fig. 6 is another schematic structural diagram of a calibration device for a vehicle temperature-controlled ball valve according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The calibration method for the vehicle temperature control ball valve can be applied to a calibration system for the vehicle temperature control ball valve, and the calibration system for the vehicle temperature control ball valve comprises an engine, a temperature control ball valve and a calibration device for the vehicle temperature control ball valve, wherein the engine, the temperature control ball valve and the calibration device for the vehicle temperature control ball valve are communicated through a bus; and if the water temperature of the engine is higher than a second preset temperature, controlling the temperature control ball valve to impact the top dead center of the temperature control ball valve, and determining the current top dead center position, so as to calibrate the stroke of the temperature control ball valve according to the current top dead center position, the initial starting point and the initial ending point, wherein the second preset temperature is higher than the first preset temperature.
In this embodiment, the calibration system for the vehicle temperature-controlled ball valve includes the engine, the temperature-controlled ball valve, and the calibration device for the vehicle temperature-controlled ball valve, which are only exemplary illustrations, and in other embodiments, the calibration system for the vehicle temperature-controlled ball valve may include others, which are not described herein again.
In the engine cooling system, the temperature control module drives the ball valve through the motor to cool the engine, the rotation angle of the ball valve has a close control relationship with the flow rate of the cooling liquid, and the opening degree (rotation angle) of the ball valve is controlled to control the opening degree of the branch, so that the flow rate of the cooling liquid in the branch can be distributed as required. The ball valve opening is aligned with the conduit and the branch is fully open to allow coolant to flow in. Compared with the traditional wax-bag thermostat, the thermostat has the advantages of fast control response and capability of actively carrying out stepless regulation. In actual use, due to long-term movement of the ball valve, the angular position of the ball valve may deviate from the expected position, so that the expected cooling effect cannot be achieved, and a risk is caused. Thus, the ball valve requires self-learning to calibrate its travel each time the vehicle is started. However, in the prior art, the ball valve needs to complete at least one full-stroke rotation every time the ball valve is subjected to stroke calibration, that is, the ball valve needs to complete top dead center impact and bottom dead center impact, 2000 ten thousand degrees of rotation needs to be added when the ball valve is calibrated for 10 ten thousand times in the service life of a vehicle, and excessive abrasion of a sealing element is caused by extra angular rotation, so that the service life of the temperature control module is reduced.
In order to solve the above problems, the present invention provides a calibration method for a vehicle temperature control ball valve, wherein when a vehicle is started, a temperature control module enters a normal operation mode, and a calibration process for a temperature control ball valve stroke is decomposed according to the water temperature of an engine by acquiring the water temperature of the engine and an initial starting point and an initial ending point of the temperature control ball valve stroke, that is, the calibration method for the temperature control ball valve is divided into two cases according to the water temperature of the engine:
if the water temperature of the engine is lower than a first preset temperature, the temperature control module enters a rapid warming mode, the rotation angle of a temperature control ball valve of the temperature control module is maintained at a small angle at the moment, the temperature control ball valve is close to a lower dead center, the temperature control ball valve is controlled to impact the lower dead center of the temperature control ball valve, the current lower dead center position is determined, and then the stroke of the temperature control ball valve is calibrated according to the current lower dead center position, an initial starting point and an initial end point;
if the water temperature of the engine is higher than a second preset temperature, the rotation angle of the temperature control ball valve of the temperature control module is continuously increased at the moment, the temperature control ball valve is close to the top dead center, the temperature control ball valve is controlled to impact the top dead center of the temperature control ball valve, the current top dead center position is determined, and then the stroke of the temperature control ball valve is calibrated according to the current top dead center position, the initial starting point and the initial stopping point, wherein the second preset temperature is higher than the first preset temperature.
According to the temperature control ball valve calibration method, the temperature control ball valve calibration method is divided into two conditions according to the water temperature of an engine, when a vehicle is started each time, only the temperature control ball valve needs to be controlled to perform bottom dead center impact or top dead center impact, the current position of the temperature control ball valve is determined, the stroke of the temperature control ball valve can be calibrated, and the temperature control ball valve is not required to complete full stroke calibration including the top dead center impact and the bottom dead center impact, so that the rotation angle of the temperature control ball valve during stroke calibration each time is reduced, the abrasion of a sealing element of a temperature control module is reduced, the influence of the stroke calibration on the service life of the temperature control module is further reduced, and the service life of the temperature control module is guaranteed.
Two cases of the calibration method of the present invention for a temperature-controlled ball valve for a vehicle will be described as first and second embodiments, based on the water temperature of an engine.
Example one
In an embodiment, as shown in fig. 1, a calibration method for a vehicle temperature-controlled ball valve is provided, which is described by taking an example that the method is applied to a calibration device for a vehicle temperature-controlled ball valve, and includes the following steps:
SA 10: when the vehicle is started, the water temperature of the engine is obtained, and an initial starting point and an initial ending point of the stroke of the temperature control ball valve are obtained.
In order to ensure the normal work of the temperature control module, the temperature control ball valve can meet the requirements of an engine, and the stroke range of the normal work of the temperature control ball valve needs to be defined; the end point of the temperature control ball valve stroke is the position of 100% of the ball valve opening, namely the initial end point of the temperature control ball valve stroke is P100, at the moment, the temperature control ball valve is completely opened, and the cooling liquid branch is completely closed.
When a vehicle is started, the temperature control module enters a normal working mode, and at the moment, the water temperature of the engine needs to be judged preferentially so as to determine the calibration method of the vehicle temperature control ball valve according to the water temperature of the engine. Wherein, the water temperature of the engine can be obtained by a water temperature sensor.
In this embodiment, the water temperature of the engine may be obtained by a water temperature sensor, which is only an exemplary illustration, and in other embodiments, the water temperature of the engine may also be obtained by other manners, which is not described herein again.
SA 20: it is determined whether the water temperature of the engine is less than a first preset temperature.
SA 30: and if the water temperature of the engine is lower than the first preset temperature, controlling the temperature control ball valve to impact the bottom dead center of the temperature control ball valve, and determining the current bottom dead center position.
Under the normal condition, the temperature control module works normally within the range of the stroke P0-P100 of the temperature control ball valve, the temperature control ball valve can meet the requirements of all working conditions of the engine, the condition that the temperature control ball valve impacts a mechanical stop point cannot occur within the range of P0-P100, and the mechanical stop point comprises an upper stop point and a lower stop point. However, in practical use, due to long-time movement of the ball valve, the rotation angle position of the ball valve deviates from the expected position, and in order to avoid poor engine cooling effect caused by the fact that the actual rotation angle position of the temperature-controlled ball valve cannot reach the expected position, the temperature-controlled ball valve needs to be controlled to impact a mechanical stop to determine the stop position to calibrate the stroke of the temperature-controlled ball valve when the vehicle is started every time.
If the water temperature of the engine is lower than a first preset temperature, the current water temperature of the engine is low, the temperature control module enters a quick warming mode to enable the water temperature of the engine to rise rapidly, the rotating angle of the temperature control ball valve is maintained at a small angle, the temperature control ball valve is close to a bottom dead center, the temperature control ball valve is controlled to cross an initial starting point to impact the bottom dead center of the temperature control ball valve, and after the bottom dead center of the temperature control ball valve is impacted, the bottom dead center position of the impact is determined to serve as the current bottom dead center position.
In the process of movement of the temperature control ball valve, the position of the corner of the temperature control ball valve can be acquired by a position sensor of the temperature control ball valve.
In this embodiment, the position of the rotation angle of the temperature-controlled ball valve may be obtained by a position sensor of the temperature-controlled ball valve, which is only an exemplary description, and in other embodiments, the position of the rotation angle of the temperature-controlled ball valve may also be obtained by other methods, which are not described herein again.
SA 40: and calibrating the stroke of the temperature control ball valve according to the current bottom dead center position, the initial starting point and the initial ending point.
After the temperature control ball valve is controlled to impact the bottom dead center of the temperature control ball valve and the current bottom dead center position is determined, the stroke of the temperature control ball valve is calibrated according to the current bottom dead center position, the initial starting point and the initial end point, at the moment, the self-learning of the temperature control ball valve is completed to obtain the new stroke of the temperature control ball valve, the quick warming process is recovered, the opening and closing process of a small angle is kept subsequently, the temperature control ball valve is only moved to the completely closed position P0 when being closed every time, and the temperature control ball valve does not impact the bottom dead center any more.
In the embodiment, when the vehicle is started, the water temperature of the engine is obtained, the initial starting point and the initial ending point of the stroke of the temperature control ball valve are obtained, if the water temperature of the engine is lower than a first preset temperature, the temperature control ball valve is controlled to impact the lower dead point of the temperature control ball valve, the current lower dead point position is determined, and then the stroke of the temperature control ball valve is calibrated according to the current lower dead point position, the current lower dead point position and the initial starting point position, so that the stroke of the temperature control ball valve can be calibrated only by controlling the temperature control ball valve to impact the lower dead point and determining the current lower dead point position, and the temperature control ball valve is not required to complete the full stroke calibration including the upper dead point impact and the lower dead point impact, thereby reducing the rotation angle of the temperature control ball valve during the stroke calibration every time, reducing the abrasion of a sealing element of the temperature control module, and further reducing the influence of the stroke calibration on the service life of the temperature control module, the service life of the temperature control module is guaranteed.
In an embodiment, after the temperature-controlled ball valve is controlled to strike the bottom dead center of the temperature-controlled ball valve and the current bottom dead center position is determined, as shown in fig. 2, in step SA40, the step of calibrating the stroke of the temperature-controlled ball valve according to the current bottom dead center position, the initial start point, and the initial end point specifically includes the following steps:
SA 41: and determining the original bottom dead center position of the temperature control ball valve according to the initial starting point and the control precision, and determining the original top dead center position of the temperature control ball valve according to the initial ending point and the control precision.
After the control precision of the temperature control ball valve is determined, the original bottom dead center position of the temperature control ball valve is determined according to the initial starting point and the control precision, and the original top dead center position of the temperature control ball valve is determined according to the initial ending point and the control precision.
After the stroke range of the temperature control ball valve is set, the control precision of the temperature control ball valve needs to be determined so as to ensure that the temperature control ball valve does not collide with a bottom dead center in the control precision range when running to the extreme position P0 and does not collide with a top dead center in the control precision range when running to the extreme position P100 in the normal use of the temperature control ball valve. Under normal conditions, the bottom dead center position of the temperature control ball valve is the sum of the stroke starting point P0 and the control precision, and the top dead center position of the temperature control ball valve is the sum of the stroke ending point P100 and the control precision.
For example, if the control accuracy is 5 °, the control accuracy range is ± 5 °, the initial starting point P0 is 0 °, the initial ending point P100 is 200 °, and the original bottom dead center position P of the temperature-controlled ball valvedendAt an original top dead center position P of the temperature control ball valve of minus 5 degreesdendIs 205 deg..
In this embodiment, setting the control accuracy to be 5 °, the initial starting point to be 0 °, and the initial ending point to be 200 ° is only an exemplary illustration, and in other embodiments, the control accuracy, the initial starting point, and the initial ending point may also be other, and are not described herein again.
SA 42: and determining the original stroke width of the temperature control ball valve according to the original bottom dead center position and the original top dead center position.
For example, the original bottom dead center position P of the temperature-controlled ball valvedendAt an original top dead center position P of the temperature control ball valve of minus 5 degreesdendAnd if the stroke is 205 degrees, determining the original stroke width of the temperature control ball valve according to the original bottom dead center position and the original top dead center position as follows: 205 ° - (-5 °) 210 °, i.e. the original stroke width is 210 °.
SA 43: and determining whether the error between the current bottom dead center position and the original bottom dead center position is smaller than or equal to the control precision.
And after the temperature control ball valve is controlled to impact the bottom dead center of the temperature control ball valve and the current bottom dead center position is determined, determining whether the error between the current bottom dead center position and the original bottom dead center position is smaller than or equal to the control precision. And the error between the current bottom dead center position and the original bottom dead center position is the absolute value of the difference between the current bottom dead center position and the original bottom dead center position.
For example, the control accuracy is set to 5 °, the control accuracy range is ± 5 °, the initial starting point P0 is 0 °, the initial ending point P100 is 200 °, and the original bottom dead center position P of the temperature-controlled ball valvedendAt an original top dead center position P of the temperature control ball valve of minus 5 degreesdend205 deg., if the current bottom dead center position is-4 deg., if the difference between the current bottom dead center position and the original bottom dead center position is-5 deg. -4 deg. -1 deg., then the error dff between the current bottom dead center position and the original bottom dead center position is 1 deg., and is less than 5 deg. of control precision.
In this embodiment, the current bottom dead center position is-4 ° only for exemplary illustration, and in other embodiments, the current bottom dead center position may also be other positions, which is not described herein again.
SA 44: and if the error between the current bottom dead center position and the original bottom dead center position is smaller than or equal to the control precision, determining a new starting point and a new ending point of the temperature control ball valve stroke according to the current bottom dead center position and the original stroke width.
If the error between the current bottom dead center position and the original bottom dead center position is smaller than or equal to the control precision, the error between the current bottom dead center position and the original bottom dead center position is smaller, the offset position of the temperature control ball valve is smaller, the current bottom dead center position is used as the new bottom dead center position of the temperature control ball valve, the new top dead center position of the temperature control ball valve is determined according to the current bottom dead center position and the original stroke width, the new initial point and the new end point of the stroke of the temperature control ball valve are determined according to the new bottom dead center position, the new top dead center position and the control precision, and the temperature control ball valve self-learning is completed at the moment.
For example, the control accuracy is set to 5 °, the error dff between the current bottom dead center position and the original bottom dead center position is 1 °, the initial starting point P0 is 0 °, the initial end point P100 is 200 °, and the original bottom dead center position P of the temperature-controlled ball valvedendAt an original top dead center position P of the temperature control ball valve of minus 5 degreesdendIs 205 degrees, if the current bottom dead center position is-4 degrees, the-4 degrees is taken as a new oneBottom dead center position, i.e. PtendIf the current bottom dead center position is-4 degrees, a new top dead center position P of the temperature control ball valve is determined according to the current bottom dead center position and the original stroke widthdend' 206 deg., determining the new starting point P0 ' of the temperature control ball valve stroke as 1 deg. according to the new bottom dead center position, the new top dead center position and the control precision, and the new end point P100 ' of the temperature control ball valve stroke as 201 deg..
In the embodiment, an original bottom dead center position of the temperature control ball valve is determined according to an initial starting point and control precision, an original top dead center position of the temperature control ball valve is determined according to an initial stopping point and control precision, an original stroke width is determined according to the original bottom dead center position and the original top dead center position, whether an error between a current bottom dead center position and the original bottom dead center position is smaller than or equal to the control precision or not is determined, if the error between the current bottom dead center position and the original bottom dead center position is smaller than or equal to the control precision, a new starting point and a new stopping point of a stroke of the temperature control ball valve are determined according to the current bottom dead center position and the original stroke width, the process of calibrating the stroke of the temperature control ball valve according to the current bottom dead center position, the initial starting point and the initial stopping point is further refined, and when the error between the current bottom dead center position and the original bottom dead center position is smaller than or equal to the control precision or not, the current bottom dead center position is used as a new bottom dead center position of the temperature control ball valve, and the new temperature control ball valve stroke is calculated by taking the current bottom dead center position as a basis, so that the stroke calibration process of the temperature control ball valve is simplified, and the calibration efficiency is improved.
In an embodiment, after determining the current bottom dead center position, and determining whether an error between the current bottom dead center position and the original bottom dead center position is smaller than or equal to the control accuracy, the method further includes the following steps:
SA 451: and if the error between the current bottom dead center position and the original bottom dead center position is greater than the control precision, controlling the temperature control ball valve to impact the top dead center of the temperature control ball valve, and determining the current top dead center position.
If the error between the current bottom dead center position and the original bottom dead center position is larger than the control precision, it is described that the position deviation of the rotation angle of the temperature control ball valve occurs, the stroke of the temperature control ball valve needs to be further calibrated, at this moment, the temperature control ball valve needs to be controlled to reversely impact the top dead center of the temperature control ball valve, and the current top dead center position is determined, so that a new stroke of the temperature control ball valve can be obtained according to the current bottom dead center position and the current top dead center position.
For example, the control accuracy is set to 5 °, if the current bottom dead center position is 1 °, and the difference between the current bottom dead center position and the original bottom dead center position is-5 ° -1 ° -6 °, then the error dff between the current bottom dead center position and the original bottom dead center position is 6 °, which is greater than 5 ° of the control accuracy, which indicates that the corner of the temperature control ball valve has a position offset, and further calibration of the stroke of the temperature control ball valve is required, at this time, the temperature control ball valve needs to be controlled to reversely impact the top dead center of the temperature control ball valve, and the current top dead center position is determined, so that a new stroke of the temperature control ball valve is obtained according to the current bottom dead center position and the current top dead center position.
In this embodiment, the current bottom dead center position is 1 ° only for exemplary illustration, and in other embodiments, the current bottom dead center position may also be other positions, which is not described herein again.
SA 452: and determining whether the error between the stroke width between the current top dead center position and the current bottom dead center position and the original stroke width is smaller than the control precision.
SA 453: and if the error between the stroke width between the current top dead center position and the current bottom dead center position and the original stroke width is smaller than the control precision, determining a new starting point and a new ending point of the temperature control ball valve stroke according to the current bottom dead center position and the current top dead center position.
Comparing the stroke width between the current top dead center position and the current bottom dead center position with the original stroke width, if the error between the stroke width between the front top dead center position and the current bottom dead center position and the original stroke width is smaller than the control precision, indicating that the temperature control ball valve has no deviation or has small deviation, wherein the position feedback value of the temperature control ball valve is correct, the current bottom dead center position and the current top dead center position are used as the new bottom dead center position and the new top dead center position of the temperature control ball valve, determining the new starting point of the stroke of the temperature control ball valve according to the current bottom dead center position, determining the new ending point of the stroke of the temperature control ball valve according to the current top dead center position and the control precision, and finishing the self-learning of the temperature control ball valve at the moment.
For example, the control accuracy is 5 °, the original stroke width of the temperature-controlled ball valve is 210 °, the current bottom dead center position is 1 °, the current top dead center position is 211 °, the stroke width between the current top dead center position and the current bottom dead center position is 210 °, the error between the current top dead center position and the original stroke width 210 ° is less than 5 ° of the control accuracy, it is determined that the temperature-controlled ball valve has not deviated, the position feedback value of the position sensor of the temperature-controlled ball valve is correct, the new bottom dead center position of the temperature-controlled ball valve is 1 °, the new top dead center position of the temperature-controlled ball valve is 211 °, the new starting point of the stroke of the temperature-controlled ball valve is 6 °, and the new ending point of the stroke of the temperature-controlled ball valve is 216 °.
In this embodiment, the original stroke width of the temperature-controlled ball valve is 210 ° and the current top dead center position is 211 ° only for exemplary illustration, and in other embodiments, the original stroke width and the current top dead center position may be other, which is not described herein again.
In this embodiment, after determining the current bottom dead center position, if the error between the current bottom dead center position and the original bottom dead center position is greater than the control accuracy, controlling the temperature-controlled ball valve to reversely impact the top dead center, determining the current top dead center position, determining whether the error between the stroke width between the current top dead center position and the current bottom dead center position and the original stroke width is less than the control precision, if the error between the stroke width between the current top dead center position and the current bottom dead center position and the original stroke width is less than the control precision, and if the current bottom dead center position and the original bottom dead center position have large errors, the temperature control ball valve is controlled to carry out complete stroke calibration, the calibration accuracy of the temperature control ball valve is improved, and the safety of the vehicle is further improved.
In an embodiment, in step SA30, namely, controlling the temperature-controlled ball valve to impact the bottom dead center of the temperature-controlled ball valve, the method specifically includes the following steps:
SA 31: and determining a target rotation angle of the temperature control ball valve according to the flow of the cooling liquid required by the engine, and acquiring the actual current rotation angle of the temperature control ball valve.
In the process of controlling the temperature control ball valve to impact the bottom dead center of the temperature control ball valve, the target rotation angle of the temperature control ball valve needs to be determined according to the coolant flow required by an engine, the lower the water temperature of the engine is, the less the coolant flow required by the engine is, the smaller the required target rotation angle of the temperature control ball valve is, after the target rotation angle of the temperature control ball valve is determined according to the coolant flow required by the engine, the actual current rotation angle of the temperature control ball valve needs to be obtained, and the movement direction of the temperature control ball valve can be determined according to the size between the target rotation angle and the current rotation angle.
SA 32: and if the target rotation angle is smaller than the current rotation angle, determining that the temperature control ball valve moves towards the initial starting point, and determining whether the difference between the target rotation angle and the set control precision is smaller than the corresponding angle of the initial starting point.
When the target rotation angle is smaller than the current rotation angle, the temperature control ball valve is determined to move towards the initial starting point, whether the difference between the target rotation angle and the set control precision is smaller than the corresponding angle of the initial starting point or not needs to be determined, namely after the temperature control ball valve is determined to move towards the initial starting point, whether the temperature control ball valve is in the control precision range or not needs to be checked according to the difference between the target rotation angle and the set control precision, whether the temperature control ball valve possibly exceeds the initial starting point of the stroke of the temperature control ball valve or not, and the temperature control ball valve enters the area between the initial starting point and the bottom dead center or not needs to be checked. The difference between the target rotation angle and the set control precision is smaller than the corresponding angle of the initial starting point, the temperature control ball valve possibly crosses the initial starting point of the stroke of the temperature control ball valve and enters a region between the initial starting point and the bottom dead center, and the temperature control ball valve needs to be controlled to start reducing the speed at a certain position, so that the process of impacting the bottom dead center of the temperature control ball valve is a soft landing process, and the mechanical wear generated when impacting the bottom dead center in the calibration process is reduced.
SA 33: if the difference between the target rotation angle and the set control precision is smaller than the angle corresponding to the initial starting point, controlling the temperature control ball valve to reduce the speed and impact the lower dead point of the temperature control ball valve when the rotation angle is first preset, wherein the first preset rotation angle is the sum of the corresponding angle of the initial starting point and the control precision.
If the difference between the target rotation angle and the set control precision is smaller than the angle corresponding to the initial starting point, which indicates that the temperature control ball valve possibly crosses the initial starting point of the stroke of the temperature control ball valve and enters the area between the initial starting point and the lower dead point, the temperature control ball valve is controlled to reduce the speed to impact the lower dead point of the temperature control ball valve when the rotation angle is first preset, so as to reduce the mechanical wear generated when the lower dead point is impacted in the stroke calibration process. The first preset rotation angle is the sum of the corresponding angle of the initial starting point and the control precision.
For example, the control accuracy is 5 °, the corresponding angle of the initial starting point P0 is typically 0 °, the target rotation angle is-5 °, the current rotation angle is 4 °, the sum of the corresponding angle with the first preset turning angle as the initial starting point and the control precision is 5 degrees, when the target turning angle is smaller than the current turning angle, determining the temperature control ball valve to move to the initial starting point, the difference between the target rotation angle and the set control precision is-9 degrees, it is possible that the temperature-controlled ball valve crosses the initial starting point of the stroke of the temperature-controlled ball valve into a region between the initial starting point and the bottom dead center, and at this time, then at 5 DEG of the first preset angle, the Pulse Width Modulation (PWM) duty ratio is started to be reduced so as to reduce the rotating speed of the temperature control ball valve, the speed of the temperature control ball valve is controlled to be reduced, so that the process of impacting the lower dead center of the temperature control ball valve is a soft landing process, and mechanical abrasion generated when the lower dead center is impacted in the stroke calibration process is reduced.
In this embodiment, the target rotation angle of-5 ° and the current rotation angle of 4 ° are only exemplary illustrations, and in other embodiments, the target rotation angle and the current rotation angle may be other, which is not described herein again.
In this embodiment, in the process of controlling the temperature control ball valve to impact the bottom dead center of the temperature control ball valve, the moving direction of the temperature control ball valve is determined by comparing the target rotation angle with the current rotation angle, when the temperature control ball valve moves towards the bottom dead center and possibly crosses the initial starting point of the stroke of the temperature control ball valve to enter the area between the initial starting point and the bottom dead center, the temperature control ball valve is controlled to reduce the speed to impact the bottom dead center, thereby the temperature control ball valve realizes soft landing in the stroke calibration process, the mechanical wear generated when the temperature control ball valve impacts the bottom dead center in the stroke calibration process is reduced, and the influence on the service life of the temperature control module in the stroke calibration process is reduced to the maximum extent.
Example two
In an embodiment, as shown in fig. 3, a calibration method for a vehicle temperature-controlled ball valve is provided, which is described by taking an example of applying a calibration apparatus for a vehicle temperature-controlled ball valve as an example, and includes the following steps:
SB 10: when the vehicle is started, the water temperature of the engine is obtained, and an initial starting point and an initial ending point of the stroke of the temperature control ball valve are obtained.
When a vehicle is started, the water temperature of an engine needs to be judged preferentially at the moment so as to determine the calibration method of the vehicle temperature control ball valve according to the water temperature of the engine, so that when the vehicle is started, the water temperature of the engine needs to be acquired, and an initial starting point and an initial ending point of a stroke of the temperature control ball valve are acquired.
SB 20: it is determined whether the water temperature of the engine is greater than a second preset temperature.
SB 30: and if the water temperature of the engine is higher than the second preset temperature, controlling the temperature control ball valve to impact the top dead center of the temperature control ball valve, and determining the current top dead center position.
After a vehicle is started, if the water temperature of an engine is not lower than a first preset temperature, a temperature control module enters a normal working mode in advance, a temperature control ball valve does not calibrate the stroke of the temperature control ball valve temporarily until the water temperature of the engine rises and the cooling requirement of the engine is more and more large, and finally the water temperature rising to the engine is higher than a second preset temperature.
SB 40: and calibrating the stroke of the temperature control ball valve according to the current top dead center position, the initial starting point and the initial ending point, wherein the second preset temperature is higher than the first preset temperature.
After the temperature control ball valve is controlled to impact the top dead center of the temperature control ball valve and the current top dead center position is determined, the stroke of the temperature control ball valve is calibrated according to the current top dead center position, the initial starting point and the initial end point so as to obtain a new stroke of the temperature control ball valve. At the moment, the self-learning of the temperature control ball valve is completed, the normal working state is recovered, and the temperature control ball valve does not impact the top dead center any more.
In the embodiment, when the vehicle is started, the water temperature of the engine is obtained, the initial starting point and the initial ending point of the stroke of the temperature control ball valve are obtained, if the water temperature of the engine is higher than the second preset temperature, the temperature control ball valve is controlled to impact the upper dead point of the temperature control ball valve, the current upper dead point position is determined, the stroke of the temperature control ball valve is calibrated according to the current upper dead point position, the initial starting point and the initial ending point, the second preset temperature is higher than the first preset temperature, and the stroke of the temperature control ball valve can be calibrated without completing the full stroke calibration including the upper dead point impact and the lower dead point impact by controlling the temperature control ball valve when the vehicle is started every time, so that the rotation angle of the temperature control ball valve during the stroke calibration every time is reduced, the abrasion of a sealing element of the temperature control module is reduced, and the influence of the stroke calibration on the service life of the temperature control ball valve is further reduced, the service life of the temperature control module is guaranteed.
In an embodiment, after the temperature-controlled ball valve is controlled to strike the top dead center of the temperature-controlled ball valve and the current top dead center position is determined, as shown in fig. 4, in step SB40, the method for calibrating the stroke of the temperature-controlled ball valve according to the current top dead center position, the initial starting point and the initial ending point specifically includes the following steps:
SB 41: and determining the original bottom dead center position of the temperature control ball valve according to the initial starting point and the control precision, and determining the original top dead center position of the temperature control ball valve according to the initial ending point and the control precision.
After the control precision of the temperature control ball valve is determined, the original bottom dead center position of the temperature control ball valve is determined according to the initial starting point and the control precision, and the original top dead center position of the temperature control ball valve is determined according to the initial ending point and the control precision.
SB 42: and determining the original stroke width of the temperature control ball valve according to the original bottom dead center position and the original top dead center position.
SB 43: determining whether an error between the current top dead center position and the original top dead center position is less than or equal to the control accuracy.
More descriptions of the steps SB41-SB43 may be referred to the corresponding descriptions of the steps SA41-SA43 in the first embodiment, and the descriptions are not repeated here.
And after the temperature control ball valve is controlled to impact the top dead center of the temperature control ball valve and the current top dead center position is determined, determining whether the error between the current top dead center position and the original top dead center position is smaller than or equal to the control precision. And the error between the current top dead center position and the original top dead center position is the absolute value of the difference between the current top dead center position and the original top dead center position.
SB 44: and if the error between the current top dead center position and the original top dead center position is smaller than or equal to the control precision, determining a new starting point and a new ending point of the temperature control ball valve stroke according to the current top dead center position and the original stroke width.
If the error between the current top dead center position and the original top dead center position is smaller than or equal to the control precision, the error between the current top dead center position and the original top dead center position is smaller, the offset position of the temperature control ball valve is smaller, the current top dead center position is used as a new top dead center position of the temperature control ball valve, a new bottom dead center position of the temperature control ball valve is determined according to the current top dead center position and the original stroke width, a new initial point and a new end point of the stroke of the temperature control ball valve are determined according to the new bottom dead center position, the new top dead center position and the control precision, and at the moment, the self-learning of the temperature control ball valve is completed.
In this embodiment, the original bottom dead center position of the temperature control ball valve is determined according to the initial start point and the control precision, the original top dead center position of the temperature control ball valve is determined according to the initial end point and the control precision, the original stroke width is determined according to the original bottom dead center position and the original top dead center position, whether the error between the current top dead center position and the original top dead center position is smaller than or equal to the control precision, if the error between the current top dead center position and the original top dead center position is smaller than or equal to the control precision, the new start point and the new end point of the stroke of the temperature control ball valve are determined according to the current top dead center position and the original stroke width, the process of calibrating the stroke of the temperature control ball valve according to the current top dead center position, the initial start point and the initial end point is further refined, and when the error between the current top dead center position and the original top dead center position is smaller than or equal to the control precision, and the current top dead center position is used as a new top dead center position of the temperature control ball valve, and the new temperature control ball valve stroke is calculated by taking the current top dead center position as a basis, so that the stroke calibration process of the temperature control ball valve is simplified, and the calibration efficiency is improved.
In an embodiment, after determining the current top dead center position and determining whether an error between the current top dead center position and the original top dead center position is less than or equal to the control accuracy, the method further includes the following steps:
SB 451: and if the error between the current top dead center position and the original top dead center position is greater than the control precision, controlling the temperature control ball valve to impact the bottom dead center of the temperature control ball valve, and determining the current bottom dead center position.
If the error between the current top dead center position and the original top dead center position is larger than the control precision, the position deviation of the rotation angle of the temperature control ball valve is shown, the stroke of the temperature control ball valve needs to be further calibrated, at the moment, the temperature control ball valve needs to be controlled to reversely impact the bottom dead center of the temperature control ball valve, and the current bottom dead center position is determined, so that a new stroke of the temperature control ball valve can be obtained according to the current top dead center position and the current bottom dead center position.
SB 452: and determining whether the error between the stroke width between the current top dead center position and the current bottom dead center position and the original stroke width is smaller than the control precision.
SA 453: and if the error between the stroke width between the current top dead center position and the current bottom dead center position and the original stroke width is smaller than the control precision, determining a new starting point and a new ending point of the temperature control ball valve stroke according to the current bottom dead center position and the current top dead center position.
Comparing the stroke width between the current top dead center position and the current bottom dead center position with the original stroke width, if the error between the stroke width between the front top dead center position and the current bottom dead center position and the original stroke width is smaller than the control precision, indicating that the temperature control ball valve has no deviation or has small deviation, wherein the position feedback value of the temperature control ball valve is correct, the current bottom dead center position and the current top dead center position are used as the new bottom dead center position and the new top dead center position of the temperature control ball valve, determining the new starting point of the stroke of the temperature control ball valve according to the current bottom dead center position, determining the new ending point of the stroke of the temperature control ball valve according to the current top dead center position and the control precision, and finishing the self-learning of the temperature control ball valve at the moment.
In this embodiment, after determining the current top dead center position, if the error between the current top dead center position and the original top dead center position is greater than the control accuracy, controlling the temperature-controlled ball valve to reversely impact the bottom dead center, determining the current bottom dead center position, determining whether the error between the stroke width between the current top dead center position and the current bottom dead center position and the original stroke width is less than the control precision, if the error between the stroke width between the current top dead center position and the current bottom dead center position and the original stroke width is less than the control precision, and if the current bottom dead center position and the original bottom dead center position have large errors, the temperature control ball valve is controlled to carry out complete stroke calibration, the calibration accuracy of the temperature control ball valve is improved, and the safety of the vehicle is further improved.
In an embodiment, in step SB30, namely, controlling the temperature-controlled ball valve to impact the top dead center of the temperature-controlled ball valve, the method specifically includes the following steps:
SB 31: and determining a target rotation angle of the temperature control ball valve according to the flow of the cooling liquid required by the engine, and acquiring the actual current rotation angle of the temperature control ball valve.
In the process of controlling the temperature control ball valve to impact the top dead center of the temperature control ball valve, a target rotation angle of the temperature control ball valve needs to be determined according to the coolant flow required by an engine, the higher the water temperature of the engine is, the more the coolant flow required by the engine is, the larger the required target rotation angle of the temperature control ball valve is, after the target rotation angle of the temperature control ball valve is determined according to the coolant flow required by the engine, the actual current rotation angle of the temperature control ball valve needs to be obtained, and the movement direction of the temperature control ball valve can be determined according to the size between the target rotation angle and the current rotation angle.
SB 32: and if the target rotation angle is larger than the current rotation angle, determining that the temperature control ball valve moves to the initial termination point, and determining whether the sum of the target rotation angle and the set control precision is larger than the corresponding angle of the initial termination point.
When the target rotation angle is larger than the current rotation angle, the temperature control ball valve is determined to move towards the initial termination point, at this time, whether the sum of the target rotation angle and the set control precision is larger than the corresponding angle of the initial termination point or not needs to be determined, namely after the temperature control ball valve is determined to move towards the initial termination point, whether the temperature control ball valve possibly exceeds the initial termination point of the stroke of the temperature control ball valve and enters a region between the initial termination point and an upper stop point or not needs to be checked according to the sum of the target rotation angle and the set control precision when the temperature control ball valve is determined to move towards the initial termination point.
The sum of the target rotation angle and the set control precision is greater than the corresponding angle of the initial end point, the temperature control ball valve possibly crosses the initial end point of the travel of the temperature control ball valve and enters a region between the initial end point and a top dead center, and at the moment, the temperature control ball valve needs to be controlled to start reducing the speed at a certain position, so that the process of impacting the top dead center of the temperature control ball valve is a soft landing process, and mechanical wear generated when impacting the top dead center in the calibration process is reduced.
SB 33: if the sum of the target rotation angle and the set control precision is larger than the angle corresponding to the initial termination point, the temperature control ball valve is controlled to reduce the speed to impact the top dead center of the temperature control ball valve when the rotation angle is preset, and the second preset rotation angle is the difference between the corresponding angle of the initial termination point and the control precision.
If the sum of the target rotation angle and the set control precision is larger than the angle corresponding to the initial end point, the temperature control ball valve is likely to cross the initial end point of the stroke of the temperature control ball valve and enter a region between the initial end point and a top dead center, and the temperature control ball valve is controlled to reduce the speed to impact the top dead center of the temperature control ball valve when the second preset rotation angle is used, so that the mechanical abrasion generated when the top dead center is impacted in the stroke calibration process is reduced. Wherein, the second preset rotation angle is the difference between the corresponding angle of the initial termination point and the control precision.
For example, the control accuracy is 5 °, the corresponding angle of the initial termination point P100 is typically 200 °, the target rotation angle is 204 °, the current rotation angle is 194 °, the difference between the corresponding angle at which the second preset turning angle is the initial termination point and the control accuracy is 195 deg., when the target turning angle is larger than the current turning angle, determining that the temperature control ball valve moves to an initial termination point, the sum of a target rotation angle and the set control precision is 209 degrees and is greater than the corresponding angle of the initial termination point by 200 degrees, it is possible for the thermo-valve to pass the initial end point of the travel of the thermo-valve into the region between the initial end point and the top dead center, at which time, then at a second preset angle of 195 deg., the Pulse Width Modulation (PWM) duty cycle is started to decrease the rotation speed of the temperature controlled ball valve, the speed of the temperature control ball valve is controlled to be reduced, so that the process of impacting the top dead center of the temperature control ball valve is a soft landing process, and mechanical abrasion generated when the top dead center is impacted in the stroke calibration process is reduced.
In this embodiment, the target rotation angle of 204 ° and the current rotation angle of 194 ° are only exemplary, and in other embodiments, the target rotation angle and the current rotation angle may be other, which is not described herein again.
In this embodiment, in the process of controlling the temperature-controlled ball valve to impact the top dead center of the temperature-controlled ball valve, the moving direction of the temperature-controlled ball valve is determined by comparing the target rotation angle with the current rotation angle, and when the temperature-controlled ball valve moves towards the top dead center and possibly crosses the initial end point of the stroke of the temperature-controlled ball valve and enters the region between the initial end point and the top dead center, the temperature-controlled ball valve is controlled to reduce the speed to impact the top dead center, so that the temperature-controlled ball valve realizes soft landing in the stroke calibration process, the mechanical wear generated when the temperature-controlled ball valve impacts the top dead center in the stroke calibration process is reduced, and the influence on the service life of the temperature-controlled module in the stroke calibration process is reduced to the maximum extent.
In an embodiment, in the process of controlling the temperature-controlled ball valve to impact the top dead center or the bottom dead center of the temperature-controlled ball valve, that is, in the process of self-learning of the temperature-controlled ball valve, after determining whether the error between the stroke width between the current top dead center position and the current bottom dead center position and the original stroke width is smaller than the control precision, if the error between the stroke width between the current top dead center position and the current bottom dead center position and the original stroke width is larger than the control precision, an error is reported to limit the speed and the torque of the engine.
If the error between the stroke width between the current top dead center position and the current bottom dead center position and the original stroke width is larger than the control precision, the error of the ball temperature control valve of the temperature control module is indicated, and the temperature control module needs to report the error of the temperature control ball valve to the outside, so that the speed limit and the torque limit of the engine are realized, the temperature of the engine is reduced, and the safety accident of the vehicle is avoided.
For example, if the original stroke width of the temperature control ball valve is 210 °, the control accuracy is 5 °, the stroke width between the current top dead center position and the current bottom dead center position is 216 °, and the error between the current top dead center position and the current bottom dead center position is greater than 5 ° of the control accuracy, it indicates that the ball temperature control valve of the temperature control module has a fault such as jamming, the position feedback value of the position sensor of the temperature control ball valve is incorrect, and the temperature control module needs to report an error to the outside, so as to limit the speed of the engine.
In this embodiment, the original stroke width of the temperature-controlled ball valve is 210 ° and the stroke width between the current top dead center position and the current bottom dead center position is 211 ° only for exemplary illustration, and in other embodiments, the original stroke width and the stroke width between the current top dead center position and the current bottom dead center position may be other, which is not described herein again.
In this embodiment, if the error between the stroke width between the current top dead center position and the current bottom dead center position and the original stroke width is greater than the control accuracy, an error is reported to limit the speed and the torque of the engine, so that the engine is limited in speed and torque to reduce the temperature of the engine, thereby avoiding a safety accident of the vehicle.
With reference to the foregoing implementation or the second embodiment, in an embodiment, after the vehicle is turned off, the method further includes the following steps:
a. and adjusting the corner of the temperature control ball valve to a third preset angle so that the corner of the temperature control ball valve can meet the cooling requirement of the engine when the vehicle is started next time and fails.
When the vehicle is started, the temperature control module may not respond to faults such as clamping stagnation, connector failure, motor burnout and the like, and the corner of the temperature control ball valve is kept in a state of last flameout.
Therefore, in order to keep the vehicle running normally for a certain period of time to enter the maintenance area, the rotation angle of the temperature control ball valve needs to be adjusted to a third preset angle each time the vehicle is shut down and stops, so that the rotation angle of the temperature control ball valve can meet the cooling requirement of the engine when the vehicle is started next time and fails.
For example, in a preferred embodiment, the angle of rotation of the thermostatic ball valve is adjusted to at least a position in which the radiator branch is fully open, i.e., the third predetermined angle is required to be greater than 160 °, i.e., the angle of rotation of the thermostatic ball valve is adjusted to a range of 160 ° to 200 °, such as the third predetermined angle P, each time the vehicle is turned off and stoppedstop170 deg. to make the vehicle radiator branch fully open, so that the vehicle can quickly radiate heat.
In this embodiment, the third preset angle is required to be larger than 160 ° and the third preset angle PstopThe angle of 170 ° is merely an exemplary illustration, and in other embodiments, the third preset angle may be other, which is not described herein again.
b. And determining the starting point and the ending point of the current travel of the temperature control ball valve as the initial starting point and the initial ending point of the travel of the temperature control ball valve when the vehicle is started next time.
When the vehicle is flamed out and stopped every time, the range of the current temperature control ball valve stroke needs to be determined, and the starting point and the end point of the current temperature control ball valve stroke are used as the initial starting point and the initial end point of the temperature control ball valve stroke when the vehicle is started next time, so that a data basis is provided for the temperature control ball valve stroke calibration when the vehicle is started later.
In this embodiment, after the vehicle stalls, adjust the corner through with the corner of control by temperature change ball valve to the third angle of predetermineeing, with the cooling demand that the corner of control by temperature change ball valve can satisfy the engine when the vehicle starts the trouble next time, when avoiding starting the vehicle and the temperature control module breaks down next time, the potential safety hazard and the inconvenience that the corner of control by temperature change ball valve can not satisfy the engine cooling demand and lead to, and confirm the initial point and the termination point of current control by temperature change ball valve stroke, as the initial point and the initial termination point of control by temperature change ball valve stroke when the vehicle starts next time, thereby provide the data basis for the control by temperature change ball valve stroke calibration of going on when the back vehicle starts.
In one embodiment, when the temperature-controlled ball valve signal loss is detected, the temperature-controlled ball valve is forced to perform full-stroke calibration, and the temperature-controlled ball valve impacts the top dead center of the temperature-controlled ball valve first in a soft landing manner to determine a top dead center position, and then impacts the bottom dead center of the temperature-controlled ball valve to determine a bottom dead center position, and the temperature-controlled ball valve stroke is calibrated according to the top dead center position and the bottom dead center position.
When detecting that the temperature control ball valve signal is lost, the temperature control module may be in the process of inserting and pulling the connector again, considering that the sample is overhauled or replaced, forcing the temperature control ball valve to carry out the full-stroke calibration, firstly impacting the top dead center of the temperature control ball valve in a soft landing manner, determining the top dead center position, then impacting the bottom dead center of the temperature control ball valve, determining the bottom dead center position, and calibrating the stroke of the temperature control ball valve according to the top dead center position and the bottom dead center position.
After the temperature control module plugs and pulls out the connector again, the original determination of the stroke of the temperature control ball valve is not accurate any more or even can be lost, and the stroke of the temperature control ball valve needs to be confirmed again at the moment, so that the temperature control ball valve needs to be controlled to complete the calibration of the full stroke so as to obtain a new stroke, and a user controls the temperature control ball valve to cool the engine according to the new stroke.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
In an embodiment, a calibration apparatus for a vehicle temperature-controlled ball valve is provided, which corresponds to the calibration method for a vehicle temperature-controlled ball valve in the above embodiments one to one. As shown in fig. 5, the calibration apparatus for a vehicle temperature-controlled ball valve includes an obtaining module 501, a first control module 502, a first calibration module 503, a second control module 504 and a second calibration module 505. The functional modules are explained in detail as follows:
the acquiring module 501 is used for acquiring the water temperature of an engine when a vehicle is started, and acquiring an initial starting point and an initial ending point of a stroke of a temperature control ball valve;
a first control module 502, configured to control the temperature-controlled ball valve to impact a bottom dead center of the temperature-controlled ball valve and determine a bottom dead center position if a water temperature of the engine is lower than a first preset temperature;
a first calibration module 503, configured to calibrate a stroke of the temperature-controlled ball valve according to the current bottom dead center position, the initial starting point, and the initial ending point;
a second control module 504, configured to control the temperature-controlled ball valve to impact a top dead center of the temperature-controlled ball valve and determine a current top dead center position if the water temperature of the engine is greater than a second preset temperature;
and a second calibration module 505, configured to calibrate a stroke of the temperature-controlled ball valve according to a current top dead center position, the initial starting point, and the initial ending point, where the second preset temperature is greater than the first preset temperature.
The first calibration module 503 is specifically configured to:
determining the original bottom dead center position of the temperature control ball valve according to the initial starting point and the control precision, and determining the original top dead center position of the temperature control ball valve according to the initial ending point and the control precision;
determining the original stroke width of the temperature control ball valve according to the original bottom dead center position and the original top dead center position;
and if the error between the current bottom dead center position and the original bottom dead center position is smaller than or equal to the control precision, determining a new starting point and a new ending point of the temperature control ball valve stroke according to the current bottom dead center position and the original stroke width.
Wherein the first calibration module 503 is further specifically configured to:
if the error between the current bottom dead center position and the original bottom dead center position is larger than the control precision, controlling the temperature control ball valve to impact the top dead center of the temperature control ball valve, and determining the current top dead center position;
determining whether the error between the stroke width between the current top dead center position and the current bottom dead center position and the original stroke width is smaller than the control precision;
and if the error between the stroke width between the current top dead center position and the current bottom dead center position and the original stroke width is smaller than the control precision, determining a new starting point and a new ending point of the temperature control ball valve stroke according to the current bottom dead center position and the current top dead center position.
The second calibration module 505 is specifically configured to:
determining the original bottom dead center position of the temperature control ball valve according to the initial starting point and the control precision, and determining the original top dead center position of the temperature control ball valve according to the initial ending point and the control precision;
determining the original stroke width of the temperature control ball valve according to the original bottom dead center position and the original top dead center position;
and if the error between the current top dead center position and the original top dead center position is smaller than or equal to the control precision, determining a new starting point and a new ending point of the temperature control ball valve stroke according to the current top dead center position and the original stroke width.
Wherein the second calibration module 505 is further specifically configured to:
if the error between the current top dead center position and the original top dead center position is larger than the control precision, controlling the temperature control ball valve to reversely impact the bottom dead center, and determining the current bottom dead center position;
determining whether the error between the stroke width between the current top dead center position and the current bottom dead center position and the original stroke width is smaller than the control precision;
and if the error between the stroke width between the current top dead center position and the current bottom dead center position and the original stroke width is smaller than the control precision, determining a new starting point and a new ending point of the temperature control ball valve stroke according to the current bottom dead center position and the current top dead center position.
The first control module 502 is specifically configured to:
determining a target rotation angle of the temperature control ball valve according to the flow of the cooling liquid required by the engine, and acquiring an actual current rotation angle of the temperature control ball valve;
if the target turning angle is smaller than the current turning angle, determining that the temperature control ball valve moves towards the initial starting point, and determining whether the difference between the target turning angle and the set control precision is smaller than the corresponding angle of the initial starting point;
if the difference between the target rotation angle and the set control precision is smaller than the angle corresponding to the initial starting point, controlling the temperature control ball valve to reduce the speed and impact the bottom dead center of the temperature control ball valve when the rotation angle is a first preset rotation angle, wherein the first preset rotation angle is the sum of the angle corresponding to the initial starting point and the control precision.
The first control module 504 is specifically configured to:
determining a target rotation angle of the temperature control ball valve according to the cooling requirement of the engine, and acquiring the actual current rotation angle of the temperature control ball valve;
if the target rotation angle is larger than the current rotation angle, determining that the temperature control ball valve moves towards the initial termination point, and determining whether the sum of the target rotation angle and the set control precision is larger than the corresponding angle of the initial termination point;
if the sum of the target rotation angle and the set control precision is larger than the angle corresponding to the initial termination point, controlling the temperature control ball valve to reduce the speed to impact the top dead center of the temperature control ball valve when a second preset rotation angle is obtained, wherein the second preset rotation angle is the difference between the angle corresponding to the initial termination point and the control precision.
Wherein, the first control module 502 is further specifically configured to:
adjusting the rotation angle of the temperature control ball valve to a third preset angle so that the rotation angle of the temperature control ball valve can meet the cooling requirement of the engine when the vehicle is started next time and fails;
and determining the starting point and the ending point of the current travel of the temperature control ball valve as the initial starting point and the initial ending point of the travel of the temperature control ball valve when the vehicle is started next time.
For specific limitations of the calibration device for the vehicle temperature-controlled ball valve, reference may be made to the above limitations of the calibration method for the vehicle temperature-controlled ball valve, and details thereof are not repeated herein. All or part of each module in the temperature control ball valve calibration device for the vehicle can be realized by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the determination machine equipment, and can also be stored in a memory in the determination machine equipment in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, a calibration device for a vehicle temperature-controlled ball valve is provided, and comprises a processor and a memory which are connected through a system bus. Wherein, the processor of the calibration device for the vehicle temperature-controlled ball valve is used for providing determination and control capability. The memory of the vehicle temperature control ball valve calibration device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a determining machine program. The internal memory provides an environment for the operating system and the execution of the certain machine program in the non-volatile storage medium. The determining machine program is executed by a processor to implement a method for calibrating a temperature-controlled ball valve for a vehicle.
In one embodiment, as shown in fig. 6, there is provided a calibration device for a vehicle temperature-controlled ball valve, including a memory, a processor and a determination program stored in the memory and executable on the processor, wherein the processor implements the following steps when executing the determination program:
when a vehicle is started, acquiring the water temperature of an engine, and acquiring an initial starting point and an initial ending point of a stroke of a temperature control ball valve;
if the water temperature of the engine is lower than a first preset temperature, controlling the temperature control ball valve to impact a bottom dead center of the temperature control ball valve, and determining the position of the bottom dead center;
calibrating the stroke of the temperature control ball valve according to the current bottom dead center position, the initial starting point and the initial ending point;
if the water temperature of the engine is higher than a second preset temperature, controlling the temperature control ball valve to impact the top dead center of the temperature control ball valve, and determining the current top dead center position;
calibrating the stroke of the temperature control ball valve according to the current top dead center position, the initial starting point and the initial ending point, wherein the second preset temperature is higher than the first preset temperature.
In one embodiment, there is provided a readable storage medium having stored thereon a determining machine program which when executed by a processor performs the steps of:
when a vehicle is started, acquiring the water temperature of an engine, and acquiring an initial starting point and an initial ending point of a stroke of a temperature control ball valve;
if the water temperature of the engine is lower than a first preset temperature, controlling the temperature control ball valve to impact a bottom dead center of the temperature control ball valve, and determining the position of the bottom dead center;
calibrating the stroke of the temperature control ball valve according to the current bottom dead center position, the initial starting point and the initial ending point;
if the water temperature of the engine is higher than a second preset temperature, controlling the temperature control ball valve to impact the top dead center of the temperature control ball valve, and determining the current top dead center position;
calibrating the stroke of the temperature control ball valve according to the current top dead center position, the initial starting point and the initial ending point, wherein the second preset temperature is higher than the first preset temperature.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above may be implemented by hardware instructions of a determination machine program, which may be stored in a non-volatile determination machine readable storage medium, and when executed, may include processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.

Claims (10)

1. A calibration method for a temperature-controlled ball valve for a vehicle is characterized by comprising the following steps:
when a vehicle is started, acquiring the water temperature of an engine, and acquiring an initial starting point and an initial ending point of a stroke of a temperature control ball valve;
if the water temperature of the engine is lower than a first preset temperature, controlling the temperature control ball valve to impact a bottom dead center of the temperature control ball valve, and determining the current bottom dead center position;
calibrating the stroke of the temperature control ball valve according to the current bottom dead center position, the initial starting point and the initial ending point;
if the water temperature of the engine is higher than a second preset temperature, controlling the temperature control ball valve to impact the top dead center of the temperature control ball valve, and determining the current top dead center position;
calibrating the stroke of the temperature control ball valve according to the current top dead center position, the initial starting point and the initial ending point, wherein the second preset temperature is higher than the first preset temperature.
2. The calibration method for a vehicular temperature-controlled ball valve according to claim 1, wherein the calibrating the stroke of the temperature-controlled ball valve according to the current bottom dead center position, the initial starting point and the initial ending point comprises:
determining the original bottom dead center position of the temperature control ball valve according to the initial starting point and the control precision, and determining the original top dead center position of the temperature control ball valve according to the initial ending point and the control precision;
determining the original stroke width of the temperature control ball valve according to the original bottom dead center position and the original top dead center position;
and if the error between the current bottom dead center position and the original bottom dead center position is smaller than or equal to the control precision, determining a new starting point and a new ending point of the temperature control ball valve stroke according to the current bottom dead center position and the original stroke width.
3. A method of calibrating a vehicular temperature controlled ball valve as defined in claim 2, further comprising:
if the error between the current bottom dead center position and the original bottom dead center position is larger than the control precision, controlling the temperature control ball valve to impact the top dead center of the temperature control ball valve, and determining the current top dead center position;
determining whether the error between the stroke width between the current top dead center position and the current bottom dead center position and the original stroke width is smaller than the control precision;
and if the error between the stroke width between the current top dead center position and the current bottom dead center position and the original stroke width is smaller than the control precision, determining a new starting point and a new ending point of the temperature control ball valve stroke according to the current bottom dead center position and the current top dead center position.
4. The calibration method for a vehicular temperature-controlled ball valve according to claim 1, wherein the calibrating the stroke of the temperature-controlled ball valve according to the current top dead center position, the initial starting point and the initial ending point comprises:
determining the original bottom dead center position of the temperature control ball valve according to the initial starting point and the control precision, and determining the original top dead center position of the temperature control ball valve according to the initial ending point and the control precision;
determining the original stroke width of the temperature control ball valve according to the original bottom dead center position and the original top dead center position;
and if the error between the current top dead center position and the original top dead center position is smaller than or equal to the control precision, determining a new starting point and a new ending point of the temperature control ball valve stroke according to the current top dead center position and the original stroke width.
5. The method of calibrating a vehicular temperature controlled ball valve of claim 4, further comprising:
if the error between the current top dead center position and the original top dead center position is larger than the control precision, controlling the temperature control ball valve to impact the bottom dead center of the temperature control ball valve, and determining the current bottom dead center position;
determining whether the error between the stroke width between the current top dead center position and the current bottom dead center position and the original stroke width is smaller than the control precision;
and if the error between the stroke width between the current top dead center position and the current bottom dead center position and the original stroke width is smaller than the control precision, determining a new starting point and a new ending point of the temperature control ball valve stroke according to the current bottom dead center position and the current top dead center position.
6. The calibration method for a vehicular temperature-controlled ball valve according to any one of claims 1-5, wherein said controlling said temperature-controlled ball valve to strike a bottom dead center of said temperature-controlled ball valve comprises:
determining a target rotation angle of the temperature control ball valve according to the flow of the cooling liquid required by the engine, and acquiring an actual current rotation angle of the temperature control ball valve;
if the target turning angle is smaller than the current turning angle, determining that the temperature control ball valve moves towards the initial starting point, and determining whether the difference between the target turning angle and the set control precision is smaller than the corresponding angle of the initial starting point;
if the difference between the target rotation angle and the set control precision is smaller than the angle corresponding to the initial starting point, controlling the temperature control ball valve to reduce the speed and impact the bottom dead center of the temperature control ball valve when the rotation angle is a first preset rotation angle, wherein the first preset rotation angle is the sum of the angle corresponding to the initial starting point and the control precision.
7. The calibration method for a vehicular temperature-controlled ball valve according to any one of claims 1 to 5, wherein said controlling said temperature-controlled ball valve to strike a top dead center of said temperature-controlled ball valve comprises:
determining a target rotation angle of the temperature control ball valve according to the cooling requirement of the engine, and acquiring the actual current rotation angle of the temperature control ball valve;
if the target rotation angle is larger than the current rotation angle, determining that the temperature control ball valve moves towards the initial termination point, and determining whether the sum of the target rotation angle and the set control precision is larger than the corresponding angle of the initial termination point;
if the sum of the target rotation angle and the set control precision is larger than the angle corresponding to the initial termination point, controlling the temperature control ball valve to reduce the speed to impact the top dead center of the temperature control ball valve when a second preset rotation angle is obtained, wherein the second preset rotation angle is the difference between the angle corresponding to the initial termination point and the control precision.
8. A method of calibrating a temperature controlled ball valve for a vehicle as claimed in any one of claims 1 to 5, wherein after said vehicle is turned off, the method further comprises:
adjusting the rotation angle of the temperature control ball valve to a third preset angle so that the rotation angle of the temperature control ball valve can meet the cooling requirement of the engine when the vehicle is started next time and fails;
and determining the starting point and the ending point of the current travel of the temperature control ball valve as the initial starting point and the initial ending point of the travel of the temperature control ball valve when the vehicle is started next time.
9. The utility model provides an automobile-used temperature control ball valve calibrating device which characterized in that includes:
the system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring the water temperature of an engine when a vehicle is started and acquiring an initial starting point and an initial ending point of a stroke of a temperature control ball valve;
the first control module is used for controlling the temperature control ball valve to impact a bottom dead center of the temperature control ball valve and determining the position of the bottom dead center if the water temperature of the engine is lower than a first preset temperature;
the first calibration module is used for calibrating the stroke of the temperature control ball valve according to the current bottom dead center position, the initial starting point and the initial end point;
the second control module is used for controlling the temperature control ball valve to impact the top dead center of the temperature control ball valve and determining the current top dead center position if the water temperature of the engine is higher than a second preset temperature;
and the second calibration module is used for calibrating the stroke of the temperature control ball valve according to the current top dead center position, the initial starting point and the initial ending point, and the second preset temperature is greater than the first preset temperature.
10. A calibration device for a vehicle temperature-controlled ball valve, comprising a memory, a processor and a determination program stored in the memory and executable on the processor, wherein the processor, when executing the determination program, implements the steps of the calibration method for a vehicle temperature-controlled ball valve according to any one of claims 1 to 8.
CN202010311596.2A 2020-04-20 2020-04-20 Calibration method and device for temperature control ball valve for vehicle Active CN113531185B (en)

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