KR102092119B1 - 3-Way valve for Vehicle - Google Patents

Abstract

The present invention relates to a three-way valve for a vehicle and, more specifically, to a three-way valve mainly configured such that two valve flaps are interlocked by the operation of one actuator in a process of controlling the flow of gas moving in an intake or exhaust process of a vehicle in a three-way manner, thereby having no malfunction due to the simplification of parts and making a product compact. According to the present invention, the three-way valve comprises: a valve housing with two flow paths separated from each other; a first shaft rotatably disposed in any one of the two flow paths and a first valve flap mounted thereon, and a second shaft rotatably disposed in the remaining flow path and a second valve flap mounted thereon; a drive motor provided in the valve housing; a first power transmission unit provided on a motor shaft of the drive motor; two intermediate gears provided to be engaged directly with each of the first power transmission units; and two shaft rotation gears provided to be engaged with each of the intermediate gears and connected to the first and second shafts, respectively. The two valve flaps can be rotated at the same time by the operation of the drive motor. When one valve flap performs a closing operation, the other valve flap performs an opening operation or vice versa, so that the two valve flaps perform opposite operations.

Description

3-way valve for vehicle}

The present invention relates to a three-way valve for a vehicle, and is configured such that two valve flaps are interlocked by one actuator operation in a process of controlling the flow of gas, which is mainly moved in the intake or exhaust process of a vehicle, using a three-way method. Therefore, it is related to an invention capable of compacting a product without malfunction due to simplification of parts.

In a typical diesel engine, an actuator using vacuum pressure is used for a throttle body, an EGR valve, and a VGT.

The actuator formed in the throttle body allows the throttle valve to open at a predetermined level when the driver turns the ignition key ON, so that the intake air flows into the engine, and when the key is turned OFF, the intake air It is configured to block entry into the engine.

The EGR valve is for refluxing a part of the exhaust gas discharged from the engine to the intake system, and the exhaust gas returned to the intake system reduces the temperature of the combustion gas in the cylinder, thereby suppressing the production of NOx.

VGT (Variable Geometry Turbocharger) is installed to precisely control the amount and flow rate of exhaust gas passing through the turbocharger to achieve optimal power performance between low and high speeds.

Including the EGR valve and the VGT, the inside of the vehicle is controlled by a 3-way valve for controlling gas flow.

Conventionally, the configuration of a three-way valve includes a valve passage having three passages: a first passage through which gas is introduced, a second passage and a third passage branching into two passages from the first passage, and the second passage And a plurality of valve flaps rotated along the shaft to open and close each passage of the third flow path, located outside the valve housing, and an actuator including a motor and a reducer to open and close a valve flap on one side by rotating the shaft, and the other side. It is composed of a power transmission member made of a cam or link structure that receives the power of the actuator to open and close the valve flap and drives the other shaft.

In addition, a plurality of actuators including separate motors and reducers may be installed to open and close the valve flap on the other side.

Therefore, in order to control the opening and closing of the two valve flaps, each could be operated only through a separate power transmission member.

In addition, since a plurality of actuators must be provided to control the opening and closing of the two valve flaps, the number of parts is increased, resulting in a complicated device and a malfunction.

In addition, there was a problem in that the cost is increased due to the addition of a process for fastening a number of parts individually.

In addition, when the two actuators are respectively controlled, an error occurs in the operation time, which makes it difficult to accurately control the flow rate.

Domestic registered patent No. 10-1283603 (Registration date July 1, 2013) Domestic patent registration No. 10-494417 (Registration date: June 1, 2005)

An object of the present invention is to provide a three-way valve for a vehicle to improve economic benefits and productability due to a simple structure due to a small number of parts and a low risk of failure.

In addition, another object of the present invention is to provide a three-way valve for a vehicle in which two valve flaps are interlocked with each other to enable accurate flow control without fear of malfunction.

Another object of the present invention is to provide a three-way valve for a vehicle that enables precise control of the vehicle and significantly improves durability and productability.

The present invention for achieving the above object, the valve housing is disposed two flow paths are separated from each other and spaced apart; A first shaft rotatably disposed in any one of the two flow paths, a first valve flap mounted thereto, and a second shaft disposed rotatably in the remaining flow paths and a second valve flap mounted thereto; A drive motor provided in the valve housing; A first power transmission unit provided on the motor shaft of the drive motor; Two intermediate gears respectively provided to be meshed directly with the first power transmission unit; It is provided to mesh with each of the intermediate gears, and includes two shaft rotation gears respectively connected to the first shaft and the second shaft, and the two valve flaps can be rotated at the same angle at the same time by the operation of the drive motor. It is provided, but if one valve flap is closed, the remaining valve flap performs an open operation, or vice versa, so that the two valve flaps perform opposite operations to each other. Provide a way valve.

It has an inlet flow path through which gas is introduced, and includes an adapter connected to the valve housing so that the two flow paths and the inflow path can communicate with each other, and the adapter is formed in a Y-shape.

The first power transmission unit is made of a pinion gear provided on a motor shaft, and the intermediate gear comprises a multi-layer gear having a large-diameter gear portion engaged with the pinion gear and a small-diameter gear portion engaged with the shaft rotating gear. .

The outer side of the adapter is characterized in that the mounting block is provided with an assembly hole for the installation of the pressure sensor of the gas passing through the interior of the first flow path is fixed.

The shaft rotation gear is characterized in that it is formed in a fan shape in consideration of the angle required for the opening and closing operation of the valve flaps.

A magnet mounted on the first shaft; A sensor spaced apart from the magnet and receiving a signal from the magnet; It includes a control unit for receiving the output voltage of the sensor, wherein the control unit, the first output voltage corresponding to the fully closed state of the first valve flap mounted to the first shaft, and the first valve flap mounted to the first shaft Comparing the second output voltage corresponding to the fully open state of the case, when the difference between the second output voltage and the first output voltage becomes more than a predetermined value, the second valve flap mounted on the second shaft or the second shaft Characterized as judging by the defect.

A magnet mounted on the first shaft; A sensor spaced apart from the magnet and receiving a signal from the magnet; It includes a control unit for receiving the output voltage of the sensor, the control unit, the first output voltage corresponding to the fully closed state of the first valve flap mounted to the first shaft, and the first valve flap mounted to the first shaft Recognizes the second output voltage corresponding to the fully opened state and the fully closed state of the second valve flap mounted on the second shaft, and after a certain period of time after using the valve, the second output voltage is applied to the actual second valve flap. It is characterized by learning to respond to the actual closed state by being actually stopped.

According to the present invention, the two valve flaps that open and close the second and third flow paths in accordance with one motor forward and reverse operation operated by the signal of the control circuit are correctly interlocked in opposite directions to open and close each other.

Therefore, it is possible to design a compact product with a small number of parts, a simple structure and an accurate passage opening / closing operation, and less risk of failure.

In addition, it is possible to precisely control without fear of malfunction and has the effect of significantly improving both durability, reliability and economics.

In addition, according to the present invention, whether the position of the other shaft or the valve flap mounted thereon is defective or not is determined by using the magnet provided on the shaft and the output value from the sensor detecting the signal thereof. can do.

In addition, according to the present invention, it is possible to implement a learning function capable of reflecting the deviation of the operating angle caused by wear, etc., which is caused by the use state of the valve, to the actual sensor output.

1 is a perspective view showing the overall appearance of the present invention.
2 is a perspective view showing a main part of the present invention.
3 is a front view of the present invention.
4 is a cross-sectional view taken along line AA in FIG. 3.
5 is a cross-sectional view taken along line BB in FIG. 3.
6 is a perspective view showing a main part of the present invention from the bottom.
7 is a front view of FIG. 6.
8 is a plan view of FIG. 6.
9 is a bottom view of FIG. 6.
10 to 11 are schematic diagrams showing that the position state of two valve flaps or shafts can be sensed by one sensor in the present invention.
12 is a graph showing the sensor output value suitable for the rotation angle of the valve flap in the present invention.

The present invention can be applied to various changes and can have various embodiments, and specific embodiments will be illustrated and described in the drawings.

However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

The term and / or includes a combination of a plurality of related described items or any one of a plurality of related described items.

When an element is said to be "connected" or "connected" to another component, it is understood that other components may be directly connected to or connected to the other component, but other components may exist in the middle. It should be.

On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that no other component exists in the middle.

The terms used in this application are only used to describe specific embodiments, and are not intended to limit the present invention.

Singular expressions include plural expressions unless the context clearly indicates otherwise.

In this application, the terms "include" or "have" are intended to indicate the presence of features, numbers, steps, actions, components, parts or combinations thereof described herein, one or more other features. It should be understood that the existence or addition possibilities of fields or numbers, steps, operations, components, parts or combinations thereof are not excluded in advance.

Hereinafter, exemplary embodiments will be described in detail with reference to the accompanying drawings, but the same or corresponding components are assigned the same reference numbers regardless of reference numerals, and overlapping descriptions thereof will be omitted.

1 to 9, the three-way valve for a vehicle includes a valve housing 100 in which three passages are formed to communicate with each other, and valve flaps 200 and 210 for opening and closing two branch passages, and In order to drive the valve flaps 200 and 210, the motor 400 and the first power transmission unit, the second power transmission unit, and the third power transmission unit are configured as a cover 300 for protecting an actuator.

The valve housing 100 is structured to branch into two passages, that is, the second passage 112 and the third passage 113, from the first passage 121, which is an inlet passage through which gas is introduced. In the second flow path 112 and the third flow path 113, the valve flaps 200 and 210 are rotated by the driving of the actuator, and the open passage allows the incoming gas to be moved, and the other passage is blocked to prevent gas flow. do.

The valve housing 100 is dividedly molded into the body 110 and the adapter 120 in consideration of the assembly process and the molding process, and is formed by forming flanges on each other to be fastened by bolts.

And, the sealing cap 140 is fitted to the airtight to maintain airtightness.

In the body 110, the second flow path 112 and the third flow path 113 are formed while maintaining a distance, and the plate 114 is integrally molded to the outside to be combined with the cover 300. .

The adapter 120 is formed in a cross-sectional shape that branches into a "Y" shape from the first flow path 121 so that passages are respectively connected to the second flow path 112 and the third flow path 113 of the body 110. (See Fig. 4)

A plurality of first and second valve flaps (200,210) rotated along the first and second shafts (201,211) to open and close in opposite directions to the second flow path (112) and the third flow path (113) of the valve housing (100) Are located.

One end of the first shaft 201 and the second shaft 211 is axially supported on the body 110 by rotation, and the other side is shafted on the shaft rotation gear 600,700 constituting the second power transmission unit and the third power transmission unit. Combined, when the motor 400 is driven forward and backward, power is transmitted through the first power transmission unit.

The valve flaps 200 and 210 open one side passage (eg, the second passage) to alternately cross the second passage 112 and the third passage 113 in opposite directions during the installation and assembly process, and the other passage (eg, the third passage) The flow path) is initially set to the open position.

Specifically, the first shaft 201 and the first valve flap 200 are rotatably arranged in the second flow path 112 to open and close the second flow path 112, and the second shaft 211 and the second The valve flap 210 is rotatably arranged in the third flow path 113 to open and close the third flow path 113.

The cover 300 is fastened by a joint or bolts in a state in which one side is open and covered on the outside of the plate 114 of the valve housing 100.

The receiving space formed inside the cover 300 accommodates a motor 400 for driving the valve flaps 200 and 210, a first power transmission unit, a second power transmission unit, and a third power transmission unit, and the cover 300 The above components constituting the actuator are protected.

The motor 400 is accommodated in one side of the interior space of the cover 300 and repeats forward rotation and reverse rotation by a predetermined angle when an operation signal is applied to the control circuit.

A pinion 500, which can be referred to as a first power transmission unit, is coupled to the motor shaft of the motor 400 and is driven together.

And, the second gear transmission unit (600, 611), the intermediate gear (611, 612) meshed on one side of the pinion 500, and the shaft rotation gear (600) on one side meshed with the intermediate gear (611, 612) 612).

In addition, the intermediate gear 711, 712 meshed to the other side of the second power transmission portion on the other side of the pinion 500, and the other shaft rotation gear 700 meshed with the intermediate gear 711, 712 to the third power It can be defined as the delivery unit (700, 711, 712).

Therefore, when the motor 400 is rotated at a certain angle in a certain direction by the signal of the control circuit, the second power transmission unit and the intermediate gears 611, 612, 711, and 712 are engaged with both sides of the pinion 500, respectively. The shaft rotation gears 600 and 700 of the third power transmission unit are simultaneously driven in opposite directions.

The shaft rotating gear (600,700) has a circular disc-shaped valve flap (200,210) opposite to each other, that is, one side of the valve flap is in a state in which any one of the second flow path (112) and the third flow path (113) is opened. Positioned, the other valve flap is to rotate the two valve flaps (200,210) by about 90 degrees at the same time while closing the other passage of the second flow path (112) and the third flow path (113).

In addition, when the motor 400 is driven at a constant angle in the opposite direction by the control signal from the control unit (not shown), the shaft rotation gear (second power transmission unit and third power transmission unit) engaged to both sides of the pinion 500 ( 600,700) and the two valve flaps (200,210) are rotated at the same angle at the same time, so that the opened passages are closed and the closed passages are interlocked to open at the same time.

On the other hand, the pinion 500, which is the first power transmission unit, may be directly engaged with the shaft rotation gears 600 and 700 on both sides. However, the pinion 500 and the shaft rotation gear to control the rotation speed and rotation force more strongly Between (600,700) it is good to interpose intermediate gears respectively.

The intermediate gear is preferably provided as a multi-layer gear, and the first gear part (large diameter gear parts 611,711) having a large diameter is directly meshed with the pinion 500, and the second gear part (small game gear part) having a relatively small diameter. , 612,712 are configured to mesh with the shaft rotation gear (600 700), respectively.

Therefore, while the rotational speed is reduced, the rotational force is increased so that both valve flaps 200 and 210 installed on the shaft rotation gears 600 and 700 can be operated to be opened and closed with a certain driving force.

This allows the two valve flaps to rotate at the same angle at the same time, but the arrangement is the opposite.

Meanwhile, an installation block 130 is integrally provided on the outside of the adapter 120 to install a pressure sensor for a gas passing through the inside of the first flow path 121.

The installation block 130 allows the assembly hole 131 to be in contact with the gas passing through the inside of the passage in a state in which a pressure sensor (not shown) is passed through as shown in FIG. 4, and the pressure is applied to the plurality of bolts 132. The sensor is fixed.

In addition, although the shaft rotation gears 600 and 700 may be molded into a round disk shape, the material is formed into a sector shape (partial tooth gear) in consideration of an angle required for opening and closing of the valve flaps 200 and 210 as shown in the drawing. It is more effective in saving and reducing volume and weight.

The intermediate gears 611, 612, 711, and 712 are pivotally installed at both ends of the central shaft passing through the center at the plate 114 and the cover 300, respectively.

According to the present invention, the two valve flaps 200 and 210 that open and close the second flow path 112 and the third flow path 113 according to the forward and reverse movement of one motor 400 operated by a control signal are opened and closed. Since it is correctly interlocked in the opposite direction to be closed, it is possible to mass-produce a compacted product at a lower cost without malfunction.

10 to 12 illustrate a method for sensing the arrangement state of two valve flaps using a rotation state detection sensor (eg, a hall sensor) provided on one shaft.

Here, a magnet is provided at the end of the first shaft, and a sensor (hole sensor) for detecting the magnetism of the magnet is provided on the opposite side, that is, the inner surface of the cover.

Fig. 10 shows the determination of failures of two valves (or shafts) with one sensor.

In order to check the position of the valve flap, there is a sensor on the top of the first shaft 201, but when the second valve flap 210 or the second shaft 211 fails, there is no way to check this, which is problematic. That is, when the second valve flap 210 is welded to the second shaft 211, the position of the valve flap is broken when the welded portion is damaged and the position of the valve flap is bad or the bolt is broken when assembled with bolts. It is possible to think of a case where it is poor.

That is, in the <normal> state of Fig. 10, the first valve flap 200 is in a closed state, and the second valve flap 210 is in a fully open state, the sensor on the first shaft 201 Is outputting it as 1V (first output voltage).

Thereafter, the first valve flap 200 and the second valve flap 210 are rotated by the operation of the driving motor, so that the first valve flap 200 is opened until the second valve flap 210 is completely closed. In this state, the sensor on the first shaft 201 outputs it as a fourth voltage (second output voltage). In this case, the output voltage difference in the two states becomes 3V (this is represented by Δ3V).

Hereinafter, for convenience, the first output voltage is 1V and the second output voltage is 4V, but the voltage value can be set differently at any time.

However, even in the <defective> state of FIG. 10, the sensor on the first shaft 201 is in a state where the first valve flap 200 is closed and the second valve flap 210 is completely opened. In, it outputs 1V.

Subsequently, the first valve flap 200 and the second valve flap 210 were rotated by the operation of the driving motor. Due to the position or coupling failure of the second valve flap 210, the second valve flap 210 is A completely closed state (mechanical stopping state-a state in which it completely touched the inner wall surface of the third flow path 113) was not achieved, but the first valve flap 200 exceeded the fully open state of the '1' shape It is possible to assume a state of being in a rotating state.

In this case, the sensor above the first shaft 201 will output a voltage exceeding 4V, and in this case, the difference in output voltage exceeds 3V, which is the set reference difference. In this case, since the bonding or coupling failure between the second shaft 210 and the second valve flap 211 is obvious, the control unit determines that this is defective and performs logic to notify the ECU.

11 and 12 show another embodiment. Here, the opening and closing state of the two valve flaps is detected using one sensor, but the operation state can be more reliably detected using calibration through learning.

The present invention moves two valve flaps at the same angle with one motor. In this case, when the first valve flap 200 moves in the open direction, the second valve flap 210 moves at the same angle in the closed direction, and the initial angle of the first valve flap 200 or the second valve flap 210 It will be a problem if it varies depending on the assembly deviation.

For example, when the first valve flap 200 is designated as 4V by designating 1V from the initial position and then moving 70 degrees, when theoretically becomes 4V, the first valve flap 200 is fully opened and the second The valve flap 210 means a completely closed state (see FIG. 12 (a) graph).

However, due to an assembly deviation, even if the first valve flap 200 moves 70 degrees, there may be a problem that the second valve flap 210 is not completely closed. Conversely, the second valve flap 210 may be completely closed even before the rotation angle of the first valve flap 200 reaches 70 degrees.

In order to solve this problem, the sensor output corresponding to the initial position (closed state) of the first valve flap 200 is set to 1V. And, after driving the motor to rotate the first valve flap 200 until the second valve flap 210 is completely closed, the first valve flap when the second valve flap 210 is completely closed ( The sensor output value suitable for the rotation state of 200) is set to 4V (see FIG. 12 (b)).

As described above, the sensor output value suitable for the fully closed state of the actual second valve flap 210 is set to 4V, and periodically performed to perform the learning, so that even after the valves actually operate, the operating angle deviation caused by wear or the like is taken into consideration. Based on the sensor output, it is possible to track the actual open and closed positions.

That is, when the learning mode is operated after the valve is used after a certain period of time, the sensor output corresponding to the initial position (closed state) of the first valve flap 200 is set to 1 V, and the motor is driven to drive the second valve flap ( After rotating the first valve flap 200 until fully closed of 210), the sensor output value suitable for the rotational state of the first valve flap 200 when the second valve flap 210 is completely closed is 4V. By setting to, the output value 4V can correspond to the current closed position after wear, rather than to the closed position that was before wear.

As described above, the present invention has been described with reference to the embodiment shown in the drawings, but this is only for explaining the invention, and those skilled in the art to which the present invention pertains various modifications or equivalents from the detailed description of the invention It will be understood that one embodiment is possible.

Therefore, the true scope of the present invention should be determined by the technical spirit of the claims.

100-valve housing 110-body
112-Euro 2 113-Euro 3
114-plate 200,210-valve flap
201,211-Shaft 300-Cover
400-motor 500-pinion
600,700-Shaft rotating gear 611,711-Large diameter gear part
612,712-small diameter gear part

Claims (7)

A valve housing in which two flow paths separated from each other are disposed;
A first shaft rotatably disposed in any one of the two flow paths, a first valve flap mounted thereto, and a second shaft disposed rotatably in the remaining flow paths and a second valve flap mounted thereto;
A drive motor provided in the valve housing;
A first power transmission unit provided on the motor shaft of the drive motor;
Two intermediate gears each directly provided to be meshed with the first power transmission unit;
It is provided to mesh with each of the intermediate gear, and includes two shaft rotation gears respectively connected to the first shaft and the second shaft,
By the operation of the drive motor is provided so that the two valve flaps can be rotated at the same angle at the same time, when one valve flap is closed operation, the remaining valve flap performs an open operation, or vice versa, The two valve flaps perform opposite actions,
The first power transmission unit is made of a pinion gear provided on a motor shaft, and the intermediate gear includes a multi-layer gear having a large diameter gear portion engaged with the pinion gear and a small diameter gear portion engaged with the shaft rotating gear,
An intermediate gear meshed to one side of the pinion and a shaft rotation gear meshed to one side of the pinion gear constitute a second power transmission unit,
An intermediate gear meshed on the other side of the pinion on the other side of the second power transmission section and a shaft rotation gear on the other side meshed with the intermediate gear constitute a third power transmission section,
When the motor is operated by the control signal, the shaft rotation gear on one side of the second power transmission portion and the shaft rotation gear on the other side of the third power transmission portion are driven in opposite directions through the intermediate gears respectively engaged to both sides of the pinion,
The rotational angle of the first shaft and the first valve flap connected to one shaft rotating gear and the same, and the rotational angle of the rotating gear of the other shaft and the second shaft and the second valve flap connected thereto are the same,
It has an inlet flow path through which the gas flows, and includes an adapter connected to the valve housing so that the two flow paths and the inflow path can communicate, and the adapter is formed in a Y-shape,
A three-way valve for a vehicle, characterized in that an installation block in which an assembly hole is provided for installation of a pressure sensor for gas passing through the inside of the first flow path is fixedly attached to the outside of the adapter. delete delete delete According to claim 1,
The shaft rotary gear is a three-way valve for a vehicle, characterized in that it is formed into a fan shape in consideration of an angle required for opening and closing of the valve flaps. According to claim 1,
A magnet mounted on the first shaft;
A sensor spaced apart from the magnet and receiving a signal from the magnet;
It includes a control unit for receiving the output voltage of the sensor,
The control unit may include a first output voltage corresponding to a fully closed state of a first valve flap mounted on the first shaft, and a second output voltage corresponding to a completely open state of a first valve flap mounted on the first shaft. In comparison,
When the difference between the second output voltage and the first output voltage is greater than or equal to a predetermined value, a 3-way valve for a vehicle is characterized in that it is judged as a failure of the second valve flap mounted on the second shaft or the second shaft. According to claim 1,
A magnet mounted on the first shaft;
A sensor spaced apart from the magnet and receiving a signal from the magnet;
It includes a control unit for receiving the output voltage of the sensor,
The control unit includes a first output voltage corresponding to a fully closed state of the first valve flap mounted on the first shaft, a first open valve flap mounted on the first shaft, and a first output voltage mounted on the second shaft. Recognize the second output voltage corresponding to the fully closed state of the 2-valve flap,
After a certain period of time after the valve is used, a 3-way valve for a vehicle, characterized in that the second output voltage is learned so that the actual second valve flap actually stops and responds to a completely closed state.

Images