KR102356911B1 - Valve - Google Patents

Abstract

The present invention relates to a valve. More specifically, the present invention relates to a valve which is able to control a valve power supply by a pulse width modulation method and minimize impact sound when operating. According to the present invention, the valve is able to control an external power supply by a pulse width modulation method, apply the power supply to a solenoid, and include a rise duty section, full duty section, retention duty section, and fall duty section, and minimize impact sound. In addition, according to the present invention, the valve is able to detect a position of a load by using a hall sensor, control the rise duty section to not cause impact sound on the load, and more definitely prevent the generation of impact sound. According to the present invention, the valve is able to detect the position of a load by using a hall sensor, and when controlling the solenoid in accordance with the fall duty section, controls the step by 0% of duty when the load moves to an off position, and reduce the time required for controlling the solenoid in accordance with the fall duty section.

Description

valve{VALVE}

The present invention relates to a valve, and more particularly, to a valve in which an impact noise is minimized when the valve is operated by controlling the valve power by a pulse width modulation method.

Vehicles can be classified into internal combustion engine vehicles, hybrid electric vehicles, and pure electric vehicles according to the type of power source that generates driving force.

An internal combustion engine vehicle is a type of vehicle that generates power by burning fossil fuel, and is currently the most used type of vehicle. In order to solve the problem of depletion of fossil fuels used as fuel for internal combustion engine vehicles and environmental pollution, hybrid electric vehicles and pure electric vehicles have been developed and their penetration rates are gradually increasing.

Hybrid electric vehicles can be divided into two different types as follows.

A first type of hybrid electric vehicle includes both a motor and an internal combustion engine, and drives the motor by charging a battery using a driving force of the internal combustion engine or regenerative energy generated during braking. That is, in the first type of hybrid electric vehicle, the battery is charged with power generated from the inside without receiving power from the outside.

The second type of the hybrid electric vehicle is the same as the first type in that it includes both a motor and an internal combustion engine, but a method of charging a battery by receiving electric power from the outside is added. That is, the second type of hybrid electric vehicle can charge the battery by receiving power from the outside in a plug-in method. This form is the aforementioned plug-in hybrid electric vehicle (PHEV).

Pure electric vehicles are also being developed and distributed in a plurality of forms.

A hydrogen electric vehicle is a type of driving a motor by charging a battery with electricity generated during a chemical reaction between hydrogen and oxygen. Hydrogen electric vehicles use hydrogen as a fuel to generate electricity and drive a motor, so they do not receive power from the outside to charge the battery.

Another form of a pure electric vehicle includes only a battery and a motor without using fuel such as hydrogen, but receives electric power from the outside and charges the battery to drive the motor. This form is the aforementioned plug-in electric vehicle (PEV).

Meanwhile, the aforementioned internal combustion engine vehicle, hybrid electric vehicle, and pure electric vehicle all have a system for circulating coolant to cool the drive system, and the coolant circulation system absorbs heat generated from the drive system to cool the heated coolant. Includes radiator and three-way valve for

The three-way valve includes a valve body having a pump side port for input of cooling water, a radiator port and a bypass port for outputting cooling water, and linear movement in a valve flow path formed inside the valve body, and bypasses the radiator port and the bypass port. A valve spool for opening and closing the port, and a solenoid mounted on the valve body to push the valve spool when power is applied to open the radiator port and move the bypass port to close.

However, the conventional three-way valve has a problem in that an impact sound is generated from the rod included in the solenoid when the valve is turned on/off by directly applying an external power to the solenoid. In addition, in addition to the conventional three-way valve, the solenoid valve has a problem in which an impact sound is generated when the valve is turned on/off, so a technology capable of solving the problem is required.

An object of the present invention is to provide a valve capable of reducing an impact sound when the valve is turned on/off.

The object of the present invention is not limited to the object mentioned above, and other objects and advantages of the present invention not mentioned can be understood by the following description, and will be more clearly understood by the examples of the present invention. It will also be readily apparent that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the appended claims.

The valve according to the present invention includes a valve having a plurality of flow paths, a solenoid controlling the valve by moving a rod to open and closing the plurality of flow paths, and regulating and applying external power in a pulse width modulation method according to a valve operation command to the solenoid However, a rising duty section in which the duty is raised, a full duty section in which the duty is raised to 100%, a holding duty section in which the duty is maintained between less than 100% of duty and 0% or more of duty 0%, and the duty is lowered to 0%. and a control unit for regulating and applying power including a falling duty section.

The control unit includes a communication module that receives a valve operation command including a valve on command and a valve off command from the vehicle controller, and a power control module that controls power according to the valve operation command received by the communication module and applies it to the solenoid, , the power control module controls the power including the rising duty section, the full duty section, and the maintenance duty section when receiving the valve on command from the vehicle controller and applies it to the solenoid.

The rising duty section may include a linear rising duty section in which duty is linearly increased from 0% of duty to less than 100% of duty. However, the present invention is not limited thereto, and the rising duty section may include a step rising duty section in which the duty is step-controlled from 0% duty to less than 100% duty. Furthermore, the rising duty section includes a sub-step rising duty section for step-controlling the duty from 0% duty to less than 100% duty, and after the sub-step rising duty section, the duty from the duty according to the sub-step rising duty section to less than 100% duty. It may include a sub-linear rising duty section that increases linearly.

When the power control module applies power to the solenoid, it includes a position detection module that detects the position of the magnetic material provided in the rod, and the sub-linear rising duty section detects the position of the magnetic material and controls the solenoid at 100% duty even if the solenoid is The duty may be increased linearly to move the rod to a position where no hitting sound will occur.

In the falling duty section, the duty may be linearly decreased to 0% of the duty. Of course, when the position of the magnetic material moves to the position when the valve is off during the descending duty section, the power control module may step-control the power to a duty of 0%.

The falling duty section may include a sub-step falling duty section in which the duty is step-down in the sustain duty section, and a sub-linear falling duty section in which the duty is again lowered to 0% of the duty in the sub-step falling duty section.

The power control module may step-control the power to a duty of 0% when the position of the magnetic material moves to the position when the valve is off during the sub-linear descending duty section.

The valve according to the present invention controls the external power by a pulse width modulation method and applies it to the solenoid, but includes a rising duty section, a full duty section, a maintaining duty section, and a falling duty section to minimize the impact sound.

In addition, the valve according to the present invention senses the position of the rod by using a hall sensor, and by controlling the lift duty section to such an extent that the impact sound does not occur in the rod, it is possible to more reliably prevent the occurrence of the impact sound.

The valve according to the present invention detects the position of the rod by using a hall sensor, and when controlling the solenoid according to the descending duty section, when the rod moves to the off position, the solenoid control time according to the descending duty section is controlled by step control to 0% of the duty. can be reduced

In addition to the above-described effects, the specific effects of the present invention will be described together while describing specific details for carrying out the invention below.

1 is a block diagram of a three-way valve according to the present invention.
2 is a cross-sectional view of a three-way valve according to the present invention.
3 is a cross-sectional view of the three-way valve according to the present invention, cut in a direction crossing the cross section of FIG.
4 is a waveform of power generated by the power control module in the three-way valve according to the first embodiment of the present invention.
5 is a waveform of power generated by the power control module in the three-way valve according to the second embodiment of the present invention.
6 is a waveform of power generated by the power control module in the three-way valve according to the third embodiment of the present invention.
7 is a waveform of power generated by the power control module in the three-way valve according to the fourth embodiment of the present invention.
8 is a waveform of power generated by the power control module in the three-way valve according to the fifth embodiment of the present invention.
FIG. 9 is an enlarged view of part “A” of FIG. 2 .
10 and 11 are views showing the opening and closing process of the three-way valve according to an embodiment of the present invention.

The above-described objects, features and advantages will be described below in detail with reference to the accompanying drawings, and accordingly, those of ordinary skill in the art to which the present invention pertains will be able to easily implement the technical idea of the present invention. In describing the present invention, if it is determined that a detailed description of a known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description will be omitted. Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to indicate the same or similar components.

Hereinafter, a three-way valve according to some embodiments of the present invention will be described. Here, the present invention can be applied to all types of solenoid valves including a valve having a flow path and a solenoid that opens and closes the flow path of the valve and is controlled by a power source, but for convenience of explanation, a three-way valve will be described.

1 is a block diagram of a three-way valve according to the present invention. In addition, FIG. 2 is a cross-sectional view of the three-way valve according to the present invention, and FIG. 3 is a cross-sectional view of the three-way valve according to the present invention in a direction crossing the cross-section of FIG. 1 .

The three-way valve according to the present invention is, as shown in FIGS. 1 to 3, a valve 100 for controlling the flow of a fluid, for example, cooling water, a solenoid 200 for controlling the valve 100, a valve and a control unit 300 for applying power to the solenoid 200 according to an operation command.

With reference to FIGS. 1 to 3 , each component 100 to 300 constituting the three-way valve according to the present embodiment will be described in more detail.

First, the valve 100 includes a valve body 110 in which ports 112 to 116 and flow passages 122 to 126 are formed for input and transfer of cooling water.

A supply port 112 through which cooling water is introduced is formed on one side of the valve body 110 , and a first discharge port 114 and a second discharge port 116 through which the cooling water is discharged are formed on the other side of the valve body 110 . A supply passage 122 connected to the supply port 112 is formed inside the valve body 110 , and is branched from the supply passage 122 and connected to the first discharge port 114 and the second discharge port 116 , respectively. A first discharge passage 124 and a second discharge passage 126 are formed.

The first discharge port 114 and the first discharge passage 124 are located above the supply passage 122 , and the second discharge port 116 and the second discharge passage 126 are located in the lower portion of the supply passage 122 . is located in That is, the first discharge port 114 and the first discharge passage 124 , and the second discharge port 116 and the second discharge passage 126 are formed and positioned to face each other with respect to the supply passage 122 . .

A first valve seat 134 and a second valve seat 136 protruding toward the supply passage 122 are provided in the first discharge passage 124 and the second discharge passage 126 . The first valve seat 134 and the second valve seat 136 are for maximizing the sealing performance while minimizing the contact area with the absorber 150 for opening and closing the first discharge port 114 and the second discharge port 116. As such, it is formed in a tapered shape with a diameter decreasing toward the supply passage 122 side.

As shown in the drawing, the first valve seat 134 is formed at the lower end of the guide 132 installed on the first discharge passage 124 to guide the movement of the coolant, and the second valve seat 136 is It is formed directly on the upper end of the second discharge passage 126 .

In this way, when the first valve seat 134 is formed on the guide 132 and then assembled to the valve body 110 , the valve body 110 can be easily manufactured and the manufacturing cost can be reduced.

The rod 140 reciprocating by the solenoid 200 is provided inside the valve body 110 . The rod 140 is coupled to penetrate the solenoid 200 up and down, and the lower end thereof is located inside the first discharge passage 124 , that is, the guide 132 .

A stud 142 is extended at the lower end of the rod 140 . The stud 142 has a shaft shape extending in the longitudinal direction of the rod 140 and having a smaller diameter than the rod 140 . At the middle of the stud 142, a locking groove 144 for coupling with the absorber 150 to be described later is formed.

A pivot cam 146 is formed at the lower end of the stud 142 . The pivot cam 146 protrudes in the longitudinal direction of the rod 140 and has a shaft shape having a larger diameter than the rod 140 , and has a shaft shape with a smaller diameter toward the bottom. At this time, the lower outer periphery of the pivot cam 146 is rounded, which is to prevent interference during rotation of the absorber 150, which will be described later.

The lower end of the rod 140 , that is, the pivot cam 146 , is coupled with an absorber 150 , which is freely rotatable in the axial direction of the rod 140 . That is, the absorber 150 is pivotally coupled to the lower end of the rod 140 .

The absorber 150 is located on the first discharge passage 124 and has a shaft-shaped first body 152a extending in the longitudinal direction of the rod 140, the supply passage 122 and the discharge passages 124 and 126 of the first body 152a. It is located at the branch point and consists of a second body (152b) having a disk shape.

A socket 154 for rotatably supporting the pivot cam 146 is formed at the upper end of the first body 152a. The socket 154 is formed in a cup shape that is opened upward so that the pivot cam 146 can be inserted and coupled, and a locking protrusion 156 for fixing the pivot cam 146 is provided on the middle inner circumferential surface of the socket 152 . is formed

The locking protrusion 156 is a part inserted and fixed to the locking groove 144 when the pivot cam 146 and the socket 154 are coupled, and a first inclined surface 156a formed on the inlet side of the socket 154, It is formed with a second inclined surface 156b formed on the bottom side of the socket 154 . At this time, the first inclined surface 156a and the second inclined surface 156b are formed at different inclinations.

A plurality of slits 158 are formed around the socket 154 so that the pivot cam 146 and the socket 154 can be coupled in a one-touch manner. The slit 158 extends in the insertion direction of the pivot cam 146 and has an open upper portion, so that the upper end of the socket 154 can be expanded (elastically deformed) when the pivot cam 146 is inserted.

On the other hand, a fixing ring 159 is installed around the socket 154 in which the slit 158 is formed. The retaining ring 159 prevents the socket 154 from being arbitrarily separated from the pivot cam 146 by limiting the expansion (elastic deformation) of the socket 154 .

As described above, the rod 140 and the absorber 150 are pivotally coupled to the stud 142 and the pivot cam 146 through the socket 154 . Accordingly, the absorber 150 is freely rotatable with respect to the axial direction of the rod 140 . In this case, predetermined gaps G1 and G2 are formed between the rod 140 and the absorber 150 to prevent interference with the rod 140 during free rotation of the absorber 150 .

The gaps G1 and G2 are a first gap G1 formed between the lower end of the rod 140 and the upper end of the absorber 150 , and a second gap between the lower end of the pivot cam 146 and the bottom of the socket 154 . It consists of a gap (G2). In this case, the first gap G1 is formed to be larger than the second gap G2 so that interference does not occur during free rotation of the absorber 150 .

Here, the lower outer periphery of the rod 140 is rounded to a predetermined radius, which is to prevent interference due to contact with the rod 140 during free rotation of the absorber 150 .

On the other hand, the rod 140 and the socket 154 including the pivot cam 146 so that the rod 140 and the absorber 150 are pivotally coupled, and the pivot cam 146 and the socket 154 can be coupled in a one-touch manner. ), including the absorber 150, is preferably made of different materials. For example, the rod 140 including the pivot cam 146 may be made of a metal material, and the absorber 150 including the socket 154 may be made of a synthetic resin material.

In this way, when the rod 140 and the absorber 150 are made of different materials, weight reduction of parts can be realized, and the rod 140 and the absorber 150 can be combined in various ways in addition to the above-described pivot coupling. The degree of freedom can be improved.

As described above, the second body 152b having a disk shape is formed at the lower end of the absorber 150 . The second body 152b is located at the branch point of the supply passage 122 and the discharge passages 124 and 126, and is reciprocally moved by the rod 140 and a sealing member selectively opening and closing the discharge ports 114 and 116. to be. At this time, a sealing seal 162 which is an elastic body is provided around the second body 152b, and the sealing seal 162 is made of a material having a predetermined elasticity that can be pressed against the valve seats 134 and 136, and is double-injected. It is joined to the second body (152b) in this way.

On the other hand, a piston seal 170 is provided between the valve body 110 and the solenoid 200 . The piston seal 170 serves to guide the reciprocating motion of the rod 140 and to prevent the coolant transferred through the valve body 110 from flowing into the solenoid 200 side.

Looking at the solenoid 200 with reference to FIGS. 2 and 3 , a case 210 , a bobbin 220 installed inside the case 210 , a coil 230 wound around the outer peripheral surface of the bobbin 220 , and a bobbin The yoke 240 and the core 250 coupled to the upper and lower portions of 220, respectively, and the guide 260 for maintaining the distance between the yoke 240 and the core 250, and the yoke 240 inside It includes a plunger 270 movably installed, and a spring 280 for elastically supporting the plunger 270 upward.

The case 210 has a cup shape with an open upper surface and a closed lower surface. A space is formed inside the case 210 , and the above-described parts 220 to 270 are installed in the space. The yoke 240 is seated on the upper inner peripheral surface of the case 210 . At this time, the upper end of the case 210 is curled to surround the upper end of the solenoid 200 to prevent the flow of the components 220 to 270 installed inside the case 210 and to the upper portion of the case 210 . to prevent foreign matter from entering.

The bobbin 220 has a hollow spool shape. A coil 230 for generating a magnetic field is wound around the outer peripheral surface of the bobbin 220 . The bobbin 220 is made of synthetic resin so as to electrically block between the coil 230 and the core 250 and between the coil 230 and the plunger 270 .

The coil 230 is a conducting wire that generates a magnetic field around the bobbin 220 when power is applied, and is tightly and uniformly wound around the outer circumferential surface of the bobbin 220 to form a cylindrical shape. When power is applied, the magnetic field generated in the coil 230 is induced by the core 250 to raise the plunger 270 . At this time, the strength of the magnetic field is proportional to the strength of the current flowing along the coil 230 and the number of coils 230 wound around the bobbin 220 . Therefore, as a strong current is applied to the coil 230 or a stronger magnetic field is generated as the coil 230 is wound more, the movement of the plunger 270 can be reliably controlled.

The yoke 240 and the core 250 are fixed iron cores that induce a magnetic field generated by the coil 230 . A space for the reciprocating motion of the plunger 270 is formed inside the yoke 240 , and a space for the reciprocating motion of the rod 140 is formed inside the core 250 .

The plunger 270 is a movable iron core that reciprocates by the magnetic field generated by the coil 230 .

The spring 280 is a conventional coil spring interposed between the core 250 and the plunger 270 to elastically support the plunger 270 upward.

The control unit 300 controls the power applied to the solenoid 200 so that the solenoid 200 can control the valve 100 . To this end, as shown in FIG. 1 , the control unit 300 includes a communication module 310 that receives a valve operation command through communication, and a power control module that controls power applied to the coil according to the received valve operation command ( 320), and a position detection module 330 for detecting the position of the rod 140.

The communication module 310 receives a valve operation command from a controller of the vehicle. Here, the valve operation command includes a valve-on command and a valve-off command. The valve on command is a command to apply power to the core of the solenoid 200 so that the rod 140 descends, and the valve off command is a command to cut off power to the core of the solenoid 200 so that the load 140 rises. to be. In addition, the present invention exemplifies that the three-way valve 100 is applied to an electric vehicle, and accordingly, the communication module 310 communicates with the vehicle controller through LIN (Local Interconnect Network) communication to receive a valve operation command. can

4 is a waveform of power generated by the power control module in the three-way valve according to the first embodiment of the present invention. Here, in the power waveforms of FIGS. 4 to 8 , the X-axis is time and the Y-axis is duty.

The power control module 320 regulates power applied from the outside, for example, a vehicle battery, according to the valve operation command received by the communication module 310 and applies it to the coil. Here, the valve operation command includes a valve ON command and a valve OFF command, and when the valve ON command is performed, the power control module 320 converts, for example, 12v applied from the vehicle battery into 5v and applies it to the coil, and the valve is off When commanded, the power control module 320 sets the power applied to the coil to 0v. Prior to describing the power control module 320 according to the present invention in detail, the power according to the present invention is a rising duty section for increasing duty and a 100% duty section for turning on the valve in a full duty section, 100% duty It is composed and defined as a holding duty section in which the duty is lowered and maintained enough to keep the valve on, and a lowering duty section in which the duty is lowered to 0% to turn off the valve. Also, the rising duty section may be selected from among a linear rising duty section in which the duty is linearly increased and a step rising duty section in which the duty is increased in a stepwise manner, or may be mixed. In addition, the descending duty section may also be selected from among a linear descending duty period for linearly descending a duty and a step descending duty period for descending a duty stepwise or may be mixed.

In the present invention, the power control module 320 generates a valve-on current input when a valve-on command is received and a valve-off current input when a valve-off command is generated by controlling the duty ratio of the power applied from the vehicle battery. To this end, as shown in FIG. 4 , the power control module 320 linearly increases the duty from 0% duty to a constant duty, for example, 90% duty when the valve on command is commanded, that is, a linear increase duty section. In a rising duty section, a full duty section in which a constant time is maintained after step control from a constant duty to 100% duty, and a holding duty maintained by lowering the current to a predetermined current value, for example, 0.8A after maintaining the full duty section A power source having a duty ratio of a section is generated. Also, when the valve-off command is issued, the duty is linearly decreased to 0% after the maintenance duty section, ie, power having a falling duty section that is a linear falling duty section is generated. Of course, the current value of the above-described maintenance duty section may vary depending on the target to which the three-way valve according to the present invention is applied.

5 is a waveform of power generated by the power control module in the three-way valve according to the second embodiment of the present invention.

Meanwhile, in the present invention, the rising duty section and the falling duty section can be step-controlled. As shown in FIG. 5, it consists of a rising duty section, a full duty section, a maintenance duty section, and a falling duty section, and a sub-step rising duty section (①) and a sub-linear rising duty section (②) include Accordingly, at the time of the valve-on command, a power source having a step control, that is, a sub-step rising duty section (①) is generated from duty 0% to a certain duty (range in which the rod 140 does not completely move). In addition, after creating a sub-linear rising duty section (②) that increases the duty linearly to a duty where no hitting sound is produced even if the load 140 is 100% step controlled after the sub-step rising duty section (①), 100% step control is performed. It should be maintained for a certain period of time (③). Thereafter, a power having a duty ratio of a sustain duty section (④) is generated by lowering the current to a predetermined current value, for example, 0.8A. Here, in the maintenance duty section (④), the step control for decreasing the current stepwise in the maintenance duty section may be performed, or the duty may be linearly decreased and then maintained as shown in FIG. 5 . On the other hand, without using the position detection module 330 as a falling duty section in the power source according to the second embodiment of the present invention, a linear falling duty section or a step falling duty section can be applied or used together, respectively, and a fourth implementation to be described later The falling duty section according to the example or the fifth embodiment may be applied.

6 is a waveform of power generated by the power control module in the three-way valve according to the third embodiment of the present invention.

In the present invention, power may be controlled by using a position sensing module 330 to be described later. Referring to FIG. 6 , the present embodiment, similar to the second embodiment described above, includes a rising duty section including a sub-step rising duty section (①) and a sub-linear rising duty section (②), and a full duty section (③) ) and the holding duty section (④), the power is configured, and the sub-linear rising duty section (②) is generated using the position detection module 330 to be described later. That is, the position of the rod 140 is sensed in real time, and the position is controlled up to a distance where no hitting sound is produced even if the rod 140 is 100% step-controlled. Here, the position control may be performed by proportional control (Proportional Control, P control), proportional integral control (PI control), or proportional integral derivative control (PID control). If the third embodiment of the present invention will be described in more detail, the power control module 320 includes a sub-step rising duty section (①) for step-controlling from duty 0% to a constant duty in which the plunger does not move completely, and a sub-step rising duty After the section (①), the sub-linear rising duty section (②), sub-linear rising duty that receives the position signal in real time with the hall sensor 331 and controls the position to a distance where no hitting sound is produced even if the rod 130 is 100% step-controlled. Power to include a full duty section (③) that is maintained for a certain time by 100% step control after section (②), and a maintenance duty section (④) that lowers the current to a predetermined current value, for example, 0.8A create Here, the step control according to the third embodiment of the present invention, that is, the sub-step rising duty section (①) is controlled with a lower duty than the step rising duty section according to the above-described second embodiment. On the other hand, without using the position detection module 330 as a falling duty section in the power source according to the third embodiment of the present invention, a linear falling duty section or a step falling duty section can be applied or used together, respectively, and a fourth embodiment to be described later The falling duty section according to the example or the fifth embodiment may be applied.

7 is a waveform of power generated by the power control module in the three-way valve according to the fourth embodiment of the present invention.

In the present invention, as shown in FIG. 7 , a linear falling duty section may be included as the falling duty section. In this case, the duty may be linearly decreased up to duty 0% in the sustain duty section, and the linear falling duty section may be included in the power source according to the above-described embodiment as the falling duty section. Here, when the position of the rod 140 is applied in real time from the hall sensor 331 while the power is applied according to the linear descending duty section and the rod 140 moves to the off position, the duty is immediately stepped to 0% even while the duty is falling. It is also possible to reduce the control time according to the falling duty section by controlling it.

8 is a waveform of power generated by the power control module in the three-way valve according to the fifth embodiment of the present invention.

The present invention may include a sub-step lowering duty section in which the duty is step-controlled to a distance where the valve is not completely closed as a lowering duty section, and a sub-linear lowering duty section in which the duty is linearly lowered to 0%. Here, as shown in FIG. 8 , when it is detected that the position of the rod 140 is received from the hall sensor 331 in real time and the rod 140 is moved to the off position during the sub-linear descending duty section (①), Even while the duty is falling, the control time can be shortened by performing step control (②) with duty 0%. In this case, the valve-off control time can be shortened compared to the fourth embodiment described above.

In addition, the power control module 320 may measure the output voltage, that is, the voltage applied to the coil, and then feed it back so that the voltage output from the power control module 320 is always constant. In this way, when the power control module 320 applies power to the coil according to the valve operation command, the configuration of the vehicle controller can be simplified, and a constant current can be applied to the coil regardless of external environmental conditions, thereby providing the same performance. can be implemented In addition, since the present invention can adjust the voltage applied to the coil through the duty ratio according to the valve operation command, the position of the rod 140 is also controllable. That is, the present invention can be driven by the proportional control valve 100 in addition to the on-off valve 100 . Moreover, the present invention may enable programming of the valve 100 control current according to the operating environment. Of course, the power control module 320 may directly apply power applied from the vehicle battery to the coil. In this case, the valve operation command and the power control module 320 are omitted, and the vehicle controller directly controls the vehicle battery power and applies it to the coil.

The position detection module 330 detects the position of the load 140 when the power control module 320 applies power to the coil. This can be performed by the position sensing module 330 sensing the magnetic field of the magnetic body 148 provided in the rod 140, and for this purpose, the position sensing module 330 detects the magnetic field of the magnetic body 148 to detect the voltage. It includes a hall sensor 331 to generate and a position determination module 332 to determine the position of the rod 140 based on the voltage generated by the hall sensor 331 .

The Hall sensor 331 is a device that detects the direction and magnitude of a magnetic field using the Hall effect, and generates different voltages according to the direction and magnitude of the magnetic field. As shown in FIG. 3 , the Hall sensor 331 may be located on a side surface of the magnetic body 148 . However, the present invention is not limited thereto, and the Hall sensor 331 may be located above the magnetic body 148 . The position determination module 332 stores the magnitude of the voltage generated by the Hall sensor 331 in advance. The position of the load 140 is determined by comparing it with the reference voltage. In addition, the position determination module 332 includes a voltage database 332a and a voltage comparison module 332b to determine the position of the load 140 .

The voltage database 332a stores different voltages according to the position of the load 140 , that is, the position of the magnetic body 148 . The reference voltage stored in the voltage database 332a may vary depending on the distance of the magnetic material of the Hall sensor 331 or the magnetism of the magnetic material, the movable range of the rod that may be different for each valve, and the like. This embodiment exemplifies 1v to 3.5v as the reference voltage stored in the voltage database 332a. In addition, when the reference voltage is 1v, the magnetic material 148 is in the on-state of the valve 100 in a state spaced apart from the Hall sensor 331 , and when the reference voltage is 3.5v, the magnetic material 148 is in the Hall sensor 331 . The valve 100, which is the closest state, is in an off state. According to the present invention, a reference voltage according to the position of the load 140 is defined every 0.1v or 0.5v as well as 1v and 3.5v and stored in the voltage database 332a. In this case, the voltage is divided from 1v to 3.5v to correspond to the position of the magnetic material 148, not the valve 100 on/off situation, and stored in the voltage database 332a, and according to the position of the magnetic material 148, the load ( 140) can be roughly determined. For example, if the reference voltage is 1.25v, it is determined that the position of the magnetic material 148 is located in the middle in the movable range of the rod 140, and if it is 1.25v or less, it is determined that it is located below the middle in the movable range of the rod 140. can In addition, the range in which the reference voltage exceeds 1.25v is determined to be located above the middle in the movable range of the load 140 .

The voltage comparison module 332b compares the voltage generated by the Hall sensor 331 with the reference voltage stored in the voltage database 332a to determine the position of the magnetic material 148 , that is, the load 140 . Here, the voltage comparison module 332b determines that all of the Hall sensor generated voltages are 1v or less, and all 3.5v when the Hall sensor voltage is greater than or equal to 3.5v. For example, if the Hall sensor generated voltage is 3.5v or more, the valve 100 is in an on state, and if it is 1v or less, the valve 100 is recognized as an off state. Power is controlled by the pulse width modulation method and applied to the solenoid, but the impact sound can be minimized by including a rising duty section, a full duty section, a maintaining duty section, and a falling duty section. In addition, the valve according to the present invention senses the position of the rod by using a hall sensor, and by controlling the lift duty section to such an extent that the impact sound does not occur in the rod, it is possible to more reliably prevent the occurrence of the impact sound. The valve according to the present invention detects the position of the rod by using a hall sensor, and when controlling the solenoid according to the descending duty section, when the rod moves to the off position, the solenoid control time according to the descending duty section is controlled by step control to 0% of the duty. can be reduced

The opening and closing process of the three-way valve according to the present embodiment will be described with reference to FIGS. 9 to 11 .

9 is a state in which power is not applied to the three-way valve according to the present embodiment. In this state, the rod 140 is elastically supported by the spring (280 in FIG. 1) of the solenoid (200 in FIG. 1) and moves toward the yoke (240 in FIG. 1).

When the rod 140 moves, the absorber 150 moves toward the first discharge passage 124 and is in close contact with the first valve seat 134 to close the first discharge port 114 . On the other hand, when the absorber 150 moves toward the first discharge passage 124 , since it is spaced apart from the second valve seat 136 , the second discharge port 116 is opened. Accordingly, the cooling water introduced through the supply port 112 is discharged to the second discharge port 116 through the supply passage 122 and the second discharge passage 126 .

11 is a state in which power is not applied to the three-way valve according to the present embodiment. In this state, the rod 140 moves toward the core (250 in FIG. 1) by the magnetic field generated by the solenoid (200 in FIG. 1).

When the rod 140 moves, the absorber 150 moves toward the second discharge passage 126 and is in close contact with the second valve seat 136 to close the second discharge port 116 . On the other hand, when the absorber 150 moves toward the second discharge passage 126 , since it is spaced apart from the first valve seat 134 , the first discharge port 114 is opened. Accordingly, the cooling water introduced through the supply port 112 is discharged to the first discharge port 114 through the supply passage 122 and the first discharge passage 124 .

On the other hand, since the three-way valve according to this embodiment has a structure in which the rod 140 and the absorber 150 are pivotally coupled, even if the shaft of the rod 140 is slightly twisted or bent due to tolerances (or errors) during processing and assembly, etc. It can be compensated by a pivotally coupled absorber 150 .

As shown in FIG. 10 , when the shaft of the rod 140 is twisted or bent, the absorber 150 is inclined and thus cannot be securely attached to the second valve seat 136 . However, in the present embodiment, since the rod 140 and the absorber 150 are pivotally coupled, the absorber 150 rotates through the pivot cam 146 and the socket 154 in the process of contacting the second valve seat 136 . And it is corrected to the position, it is possible to securely close the second discharge port (116).

As described above, the present invention has been described with reference to the illustrated drawings, but the present invention is not limited by the embodiments and drawings disclosed in the present specification. It is obvious that variations can be made. In addition, although the effects according to the configuration of the present invention have not been explicitly described and described while describing the embodiments of the present invention, it is natural that the effects predictable by the configuration should also be recognized. For example, although the present invention has been described by taking as an example that the control unit is applied to the three-way valve, the control unit of the present invention may be applied to a two-way valve other than the three-way valve.

100: valve 110: valve body
112: supply port 114: first discharge port
116: second discharge port 122: supply flow path
124: first discharge passage 126: second discharge passage
132: guide 134: first valve seat
136: second valve seat 140: rod
142: stud 144: catch groove
146: pivot cam 150: absorber
152a: first body 152b: second body
154: socket 156: snag
158: slit 159: retaining ring
162: sealing seal 170: piston seal
200: solenoid 300: control unit
310: communication module 320: power control module
330: position detection module 331: hall sensor
332: position determination module 332a: voltage database
332b: Voltage Comparison Module

Claims (10)

A valve having a plurality of flow passages formed therein;
a solenoid for controlling the valve by moving the rod to open and close the plurality of flow paths;
In accordance with the valve operation command, external power is regulated and applied to the solenoid in a pulse width modulation method, but a rising duty section in which the duty is raised, a full duty section in which the duty is increased to 100%, and a duty of 0 when the duty is less than 100% % or more is applied by regulating with power including a holding duty section for maintaining the duty and a falling duty section for lowering the duty to 0%, and when power is applied to the solenoid, the position of the magnetic material provided in the load is determined Includes a control unit having a position sensing module to detect,
The rising duty section includes a sub-step rising duty section for step-controlling duty from duty 0% to less than 100% of duty, and a duty from duty according to the sub-step rising duty section after the sub-step rising duty section to less than 100% of duty. includes a sub-linear rising duty section for linearly raising A valve that increases the duty linearly to move the
According to claim 1,
The control unit is
A communication module for receiving a valve operation command including a valve on command and a valve off command from the vehicle controller;
A power control module that controls power according to the valve operation command received by the communication module and applies it to the solenoid,
The power control module controls the power including the rising duty section, the full duty section, and the maintenance duty section when receiving the valve on command from the vehicle controller to apply the control power to the solenoid.
3. The method of claim 2,
The rising duty section is a valve including a linear rising duty section for linearly increasing duty from 0% duty to less than 100% duty.
3. The method of claim 2,
The rising duty section is a valve including a step rising duty section for step-controlling duty from 0% duty to less than 100% duty.
delete delete 5. The method according to any one of claims 2 to 4,
The lowering duty section is a valve for linearly lowering the duty up to 0% of duty.
5. The method according to any one of claims 2 to 4,
The power control module,
During the descending duty section, when the position of the magnetic material moves to the position when the valve is off, the valve controls the power to 0% duty.
5. The method according to any one of claims 2 to 4,
The lowering duty section includes a sub-step lowering duty section for step-down the duty in the maintenance duty section, and a sub-linear lowering duty section for lowering the duty to 0% again in the sub-step lowering duty section.
10. The method of claim 9,
The power control module,
During the sub-linear descending duty section, when the position of the magnetic material moves to the position when the valve is off, the valve controls the power to 0% duty.

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