KR101296231B1 - Engine cooling control system - Google Patents

Abstract

PURPOSE: An engine cooling control device is provided to control a speed and a driving of a cooling fan automatically by an engine management system according to a signal of a pulse width modulation (PWM) or a signal of a sensor like an engine temperature sensor or a pressure sensor. CONSTITUTION: An engine cooling control device comprises a valve (100), a conductor (200), a second housing, and a first housing (500). The valve is formed in an outer portion of a principal axis, and controls a flow of oil flowing inside an oil seal. The conductor is positioned at a lower part of the valve, and rotates with a cooling fan. The second housing is formed adjacent to a concavo-convex block part of the conductor. A hall sensor (750) is formed inside. In one side, a plastic injection including a connector part housing (610) and a PCB part housing is formed. The hall sensor and a PCB (700) are mounted on the PCB part housing. A cover is formed at an upper part of the PCB. A partition wall is formed inside the PCB part housing. In the first housing, a bobbin in which a coil is reeled is mounted on an inside, and a bearing (400) is formed by passing through a center.

Description

Engine cooling control system

The present invention belongs to the technical field related to an apparatus for controlling engine cooling by driving a fan or a pump of an automobile.

The present invention relates to a control device for cooling an engine, wherein a cooling fan is coupled to one side of the device and drives an outer cooling fan by using frictional force of a fluid in an oil seal attached to the cooling fan, thereby cooling the engine. Referring to 1, the present invention is a system mounted between one side of a crankshaft and a cooling fan to control a cooling fan operation.

Automobiles are moving living spaces, maximizing convenience and safety, and increasing the demand for low fuel consumption, exhaust gas regulations, extended warranty periods and securing stability. The environment surrounding the car includes not only demands for improving the performance of the car inherently, but also many challenges to be solved, such as energy problems and environmental problems. Regulations on automobile emissions continue to become more stringent, the dissemination of low-pollution automobiles is a challenge, and the demand for improved fuel economy by the effective use of resources is also being reinforced. Emission reduction and fuel efficiency improvement by strengthening global automobile emission regulations can be enumerated, such as automation of engine control system, weight reduction, and fuel efficiency improvement through optimization of engine cooling system.

At present, the engine cooling fan is widely used in the electric motor by DC motor and ON / OFF temperature sensitive fluid fan clutch using Bi-metal. The electric motor that drives the fan by DC motor can be installed separately from the engine, which gives flexibility in actual vehicle installation, but is mainly used for small engine cooling due to excessive power consumption. The fluid coupling fan clutch is a method of operating the cooling plate through the fluid coupling clutch using the driving force obtained through the crankshaft.

    In general, the temperature of the air passing through the radiator is detected by a bi-metallic spring, and the valve control plate inside the fan clutch is operated in accordance with the response temperature to control the amount of viscous fluid flowing into the operating chamber to control the rotation speed of the fan. This device turns the fan on and off while letting you adjust it automatically. This method consumes less auxiliary power, can be controlled according to the engine's cooling requirements, and is very advantageous in terms of noise and vibration. It can handle the cooling demand of the engine from small engines to large truck engines based on diesel. It is the most popular now.

Engine cooling air flows from the front grille by the cooling fan mounted on the fan clutch and flows into the engine room through the oil cooler, condenser and radiator. The driving force of the engine cooling fan increases in proportion to the size and operating speed of the engine, which is one of the main sources of consumption in engine power, and is the main source of engine noise and vibration. Therefore, by applying the viscous fluid fan clutch, it is possible to reduce the fan noise and vibration of the engine, which is the main aerodynamic noise source generated in the automobile, and improve the performance of the air conditioner and the fuel economy of the engine. In general, a fan that is not sufficiently circulated causes overheating and insufficient cooling operation, and when engine overcooling occurs, driving horsepower and noise are generated. On the other hand, if the fan remains in use, it causes poor fuel economy, unnecessary noise and battery dead. Therefore, it is necessary to apply automotive electronic sensors and actuators because application of advanced electronic systems is indispensable for solving strict technical challenges. In the sensors and actuators for automobiles, the necessity of detection sensitivity, detection accuracy, response speed, etc. must be maintained in the severe use environment of the vehicle, and high reliability such as heat resistance and vibration resistance is required. In the case of cooling fans with spiral thermostatic coil springs, which are widely used at present, the valve levers are simply closed by a bi-metallic spring whose thermal expansion coefficient varies depending on the engine ambient temperature, despite the advantages of the fluid coupling fan clutch. Because it has only the function to turn on and off, it is impossible to control the engine temperature precisely or the rotation speed of the fan.

Patent No. 10-1174064 (Application No.:10-2010-0012503, Coupling device for cooling fan rotation control)

In the present invention, the engine cooling system that can automatically control the drive and speed of the cooling fan by the engine control system (Engine Management System) according to the signal of the sensor, such as the engine temperature sensor or pressure sensor or Pulse Width Modulation (PWM) signal The purpose is to present a control device.

In the engine cooling control apparatus for operating the valve by generating a magnetic force formed from a coil located on the outer circumference of the main shaft 800 connected to the crank shaft,

A valve 100 formed at an outer side of the main shaft and configured to control a flow of oil flowing into the oil seal;

A concave-convex conductor 200 positioned below the valve and rotating together with a cooling fan;

A plastic part including a connector part housing and a connector part housing and a neighboring PCB part housing formed near the uneven block portion of the conductor and having a hall sensor 750 therein, and having a pin connected to an external connector on one side thereof. A second housing 600 formed of;

Includes; the first housing 500 is equipped with a bobbin coil wound therein;

The hall sensor 750 and the PCB 700 are mounted on the PCB part housing 630 of one side of the second housing, and a cover 637 is formed on the upper part of the PCB, and epoxy is sealed around the cover 637 to be sealed. In order to prevent flow into the PCB during epoxy injection, a partition 631 is formed inside the PCB part housing 630 for an epoxy accommodation space.

The cooling fan speed is detected by the Hall sensor 750 according to whether the proximity block of the conductor 200 is detected.

The magnetic field generated from the coil is induced to circulate through the spindle central axis and the valves and conductors,

The bearing side portion 410 mounted inside the first housing 500 is formed so that the sealing jaw 355 protruding from the bobbin 350 to form a ring shape is in close contact with each other, so that an injection molded product is formed during the overmolding process of forming the second housing. The engine cooling control device is characterized in that it is formed so as not to penetrate into the bearing (400).

Details are set forth in the detailed description for carrying out the invention.

According to the present invention, since the rotation speed of the cooling fan can be precisely controlled according to the sensing signal of the engine temperature or the pressure sensor, there is an effect of overcoming the limitations of the optimum engine performance and engine fuel efficiency improvement. In addition, the cooling efficiency of the engine can be maximized, and the fuel efficiency of automobiles and pollution emissions such as NOx are reduced.

1 is a photograph for explaining a portion of the present invention the device is mounted.
2 is a perspective view of a control device according to a preferred embodiment of the present invention.
3 is an exploded view of FIG.
4 shows the conductor, first and second housings and bobbins;
5 is a photograph of the first and second housings and bobbins in FIG.
FIG. 6 is a photograph of parts separated from the right photograph of FIG. 5.
7 is a perspective view of a bobbin
8 is a view for explaining the coil winding portion shape of the bobbin.
9 is a view for explaining the structure of the cap covering the coil
10 is a view for explaining the internal structure of the PCB part housing the PCB is mounted
11 is a view for the structure of the PCB mounting portion of the second housing
12 and 13 are comparative drawings before and after overmolding to form a second housing;
14 is a view for explaining the valve operation and the Hall sensor operation
15 to 26 are views illustrating various embodiments of a valve and a magnetic force simulation result.

First, the configuration and operation of the overall invention of the control device of the present invention will be described.

As shown in Fig. 1, the apparatus of the present invention is mounted between a crankshaft and a cooling fan (not shown), and corresponds to an apparatus for cooling the engine by controlling the operation of the cooling fan for cooling the engine. The present invention is to control the operation of the valve for controlling the flow of fluid in the oil seal (not shown) attached to the cooling fan.

In the control of the operation of the valve 100, the magnetic field formed in the coil 300 is transmitted to the inside and the outside of the metal members such as the bearing 400 and the conductor 200 to turn the valve on and off. In other words, the opening and closing of the valve which regulates the fluid flow is performed by the formed magnetic force.

On the other hand, the method of detecting the rotation speed of the cooling fan cooling the engine is possible by checking the rotation speed of the conductor 200 provided with the metal block formed in the uneven | corrugated form. The conductor is combined with an oil seal (not shown) so that the rotation speed of the cooling fan corresponds to the rotation speed of the conductor 200.

The Hall effect center or the Hall sensor 750 may be disposed near the metal block 210 of the conductor, so that the rotation speed of the conductor can be determined by the pulse of the detected signal (see FIG. 14). When the space between the blocks of the conductor and the Hall sensor are close to each other (Fig. 14), the signal is not detected. When the block and the Hall sensor are adjacent, the signal is detected.

DETAILED DESCRIPTION Hereinafter, detailed description will be made with reference to the accompanying drawings of the present invention.

2 is a perspective view of a control device according to a preferred embodiment of the present invention, FIG. 3 is an exploded view of FIG. 2, FIG. 4 is a conductor, first and second housings and bobbins, and FIG. 5 is a first and second housings in FIG. 4. Photograph of the bobbin, Figure 6 is a photo of the parts corresponding to the right photograph in Figure 5, Figure 7 is a perspective view of the bobbin, Figure 8 is a view for explaining the coil winding portion shape of the bobbin, Figure 9 covers the coil Figure 10 is a view for explaining the structure of the cap, Figure 10 is a view for explaining the internal structure of the PCB part housing on which the PCB is mounted, Figures 12 and 13 are comparative drawings before and after overmolding to form a second housing, Figure 14 It is a figure for demonstrating valve operation | movement and hall sensor operation | movement.

2 and 3, the other parts of the present invention are sequentially coupled to the main shaft 800 connected to the crankshaft (FIG. 1). A valve 100 is formed at the top to control the flow of oil, and the operation of the valve is performed by the magnetic force generated by the coil 300 wound on the bobbin 350.

The bobbin in which the coil is wound is mounted in the first housing 500 made of metal, and the first housing is surrounded by the second housing 600 made of plastic.

The first housing serves to protect the coils, bobbins and magnetic field transfers therein.

A conductor 200 that is coupled to a cooling fan (not shown) and rotates is formed at an upper portion of the second housing 600.

The power is supplied from the outside through a pin formed in the connector part housing 610 to operate the valve 100, and thus the rotation speed of the conductor 200 by the Hall sensor 750 mounted to the PCB part housing 630. Since the rotation speed signal of the cooling fan is detected and transmitted to the ECU, the rotation speed of the current cooling fan is appropriately controlled according to the engine overheating state.

Referring to FIG. 4, the conductor 200, the first and second housings 500 and 600, and the bobbin 350 are shown. The blocks 210 corresponding to the uneven shape of the conductor are positioned in the conductor accommodation space 660 between the outer circumference of the first housing 500 and the inner circumference of the second housing 600. As can be seen in FIG. 14, the conductor functions to direct the magnetic field generated in the coil to the valve 100. In addition, the function of detecting the rotational speed of the cooling fan by using the principle that the signal is detected only when the block 210 is approaching the hall sensor 750 near the rotation.

Referring to FIG. 5, before and after coupling states of the first and second housings 500 and 600 illustrated in FIG. 4 may be determined. Referring to FIG. 6, there is shown an exploded view of the combined picture portion on the right side of FIG. 5, wherein a bearing 400 is formed through the center of the first housing 500, and the bearing is an outer frame 405 and a bearing. And a rolling portion 420 and a bearing side portion 410.

The bearing side part 410 should be formed so that the sealing jaw 355 protruding above the bobbin 350 of FIG. This corresponds to a structure for preventing the injection of the injection into the bearing 400 during the overmolding process of forming the second housing formed by the plastic injection.

Detailed structures of the bobbin and the cap 320 refer to FIGS. 8 and 9.

The coil 300 is wound around the bobbin, and the coil winding surface 351 is formed in a hill and valley shape so that the coil winding is uniform. That is, as shown in the enlarged view of the right side of FIG. 8, several are adjacent to each other in an arc shape corresponding to the cross section of the coil to form a winding surface.

9 shows a cap 320 surrounding the coil after the coil is wound around the bobbin. The bobbin terminal mounting portion 353 to which the bobbin terminal 638 is coupled is formed at the upper side. The bobbin terminal mounting portion is fitted into the receiving hole 530 of the first housing.

On the other hand, one side of the bobbin can help to align the starting point by making a groove in the diagonal direction to facilitate the coil winding.

After winding the coil, the cap 320 is overlaid. These caps are intended to prevent the windings from being misaligned or coil breaks and shorts.

The cap 320 has a structure in which two semicircles are coupled to each other, and the two semicircular components around the hinge portion 326 are rotated so that the coupling members 322 and 324 at their ends are coupled to each other.

The coupling member is preferably formed of a slide locking structure, which is a hook 322 and a structure 324 for accommodating the hook, and the hook receiving structure is preferably formed in two or more so as to be variably coupled according to the amount of coil.

The coil may be made of aluminum in addition to copper wire. In particular, aluminum-based coils have the effect of cost reduction, heat generation reduction, and load reduction.

A molding hole 327 is formed in the middle of the body of the cap 320. In this hole, when the second housing is formed by overmolding, the injection molding is settled in the molding hole to be hardened, and the injection molding is formed in the molding hole 327, so that the cap 320 is displaced.變 位) to effectively prevent the cause.

12 and 13 correspond to a view after the second housing 600 is formed and a view before formation. FIG. 13 is a perspective view corresponding to an inverted photograph of the right side of FIG. 5, and the second housing 600 in the state of FIG. 12 by overmolding the plastic injection molded product after being disposed in the mold frame together with the pin 637 as shown in FIG. 13. To form.

During the overmolding process, the molding hole 520 of the first housing, the space between the bobbin and the first housing, and the molding hole 327 of the cap are filled with the plastic injection molding to maintain the bobbin and the first housing gap.

That is, when overmolding the second housing 600, the connector part housing 610 to which the external connector is coupled and the PCB part housing 630 to which the PCB is mounted are integrally formed, and the insert terminal (see FIG. 11) is formed in the second housing 600. The integral structure is completed by being buried in the housing.

10 and 11, after the second housing is completed, the hall sensor 750 and the PCB 700 are mounted on the PCB part housing 630 on one side of the second housing, and the cover 637 is placed on the upper part of the second housing. After the epoxy 638 is injected around the cover 637 to completely seal the PCB, electrical insulation and waterproof functions. It is preferable that a separate partition 631 (FIG. 11) is formed so as not to flow into the PCB during epoxy injection. Connector connecting portion (FIG. 11) outside the second housing 600 of the present invention is a technique that has not been presented before, the electrical components can be very stably protected against external impact from the vehicle body, and also excellent durability. . In addition, since the external connector can be directly bound to the connector part housing 610, the effect of increasing usability is remarkable.

The PCB consists of a device with a resistor, a high efficiency diode with low leakage current and high temperature performance, an automatic gain control for acquiring a high-precision PWM signal, and an integrated capacitor.

Hereinafter, unique functions and structures of the valve structure according to various embodiments of the present disclosure will be described.

In Fig. 1 , a normal valve is shown. The normal valve end is open or closed to interrupt the flow of the oil seal fluid.

Previously developed products have limitations on the selection of valve materials as a result of simulation of the valve operating force, and the effect of increasing the magnetic field is minimal. The magnetic force in the vertical direction was 1.1764 Newtons. In FIG. 22, simulation results showing the increase in the magnetic force of the fluxpass valve are shown.

FIG. 16 shows the overall magnetic field vector for the combination of FIG. 2. The magnetic field generated from the coil when the power is applied to the product is symmetric about the main axis 800, and is recycled while being transferred to the conductor 200 near the upper valve.

Refer to FIG. 18 to FIG. 22, the simulation result will be described and the structure of the flux path valve.

Referring to FIG. 22 , upper and lower plates 111 and 112 constituting the valve are coupled up and down, and a flux path 150 is formed under the lower plate 112.

When in the closed state, the horizontal portion, B portion of the fluxpath, is very close to the conductor 200.

In the open position, the A portion, the downward projection of the flux path, is very close to the conductor. In the closed state or the open state, the magnetic force line flows from the downward projection A to the conductor, and at the same time, the magnetic force flows from the upper and lower plates 111 and 112 to the conductor through the horizontal portion B.

 That is, the structure of the flux path 150 has a singularity in which the portion adjacent to the conductor 200 is different depending on the valve open and closed states.

18 and 20 , it is possible to grasp the flow state of the magnetic force. The simulation result of FIG. 21 shows that the vertical magnetic force of about 2.4 newtons in the valve open state and about 5.8 newtons in the closed state results in the generation of a higher vertical magnetic force F (z) than the normal type, and greatly improves the valve control ability. It is a form that can be made.

According to the present invention, since the rotation speed of the cooling fan can be precisely controlled according to the sensing signal of the engine temperature or the pressure sensor, there is an effect of overcoming the limitations of the optimum engine performance and engine fuel efficiency improvement. In addition, the cooling efficiency of the engine can be maximized, and the fuel efficiency of automobiles and pollution emissions such as NOx are reduced.

Hereinafter, a guide valve type as another embodiment of the valve will be described with reference to FIGS. 23 to 26.

The valve shape according to the present embodiment corresponds to a valve having a bar-shaped guide bent downward in a 'c' shape. This is called a guide valve.

If the valve is up, it is open; if it is down, it is closed.

The c-shaped bent portion is a very effective structure for concentrating toward the conductor without distributing the magnetic field to the outside. Due to the shape of the valve, the function of increasing the flow of the magnetic field is exerted, thereby exerting a force F (z) in the vertical axis direction of about four to eight times that of the normal type.

100: valve 200: conductor
210: Block 300: Coil
320: cap 322,324: coupling member
326: hinge portion 327: molding hole
340: Bobbin Terminal
350: bobbin 353: bobbin terminal mounting portion
355: sealing jaw 357: winding groove
400: bearing 405: outer frame
410: bearing side part 420: bearing rolling part
500: first housing 520: molding hole
530: accommodation hole 600: the second housing
610 connector part housing
630: PCB part housing
660: conductor accommodation space
637: Cover 700: PCB 750: Hall sensor 800: Spindle

Claims (5)

In the engine cooling control apparatus for operating the valve by generating a magnetic force formed from a coil located on the outer circumference of the main shaft 800 connected to the crank shaft,
A valve 100 formed at an outer side of the main shaft and configured to control a flow of oil flowing into the oil seal;
A concave-convex conductor 200 positioned below the valve and rotating together with a cooling fan;
A plastic part including a connector part housing and a connector part housing and a neighboring PCB part housing formed near the uneven block portion of the conductor and having a hall sensor 750 therein, and having a pin connected to an external connector on one side thereof. A second housing 600 formed of;
Includes; the first housing 500 is equipped with a bobbin coil wound therein;
The hall sensor 750 and the PCB 700 are mounted on the PCB part housing 630 of one side of the second housing, and a cover 637 is formed on the PCB.
Epoxy is coated and sealed around the cover 637, but the partition 631 is formed inside the PCB part housing 630 for epoxy containing space so as not to flow into the PCB during epoxy injection.
The cooling fan speed is detected by the Hall sensor 750 according to whether the proximity block of the conductor 200 is detected.
The magnetic field generated from the coil is induced to circulate through the spindle central axis and the valves and conductors,
The bearing 400 is formed through the center of the first housing 500, and the bearing includes an outer frame 405, a bearing rolling part 420, and a bearing side part 410.
In the bearing side portion 410,
Protruding to the upper portion of the bobbin 350, the sealing jaw 355 formed in a ring shape is formed to be in close contact,
During the overmolding process of forming the second housing, the engine cooling control apparatus, characterized in that the injection molding is formed so as not to seep into the bearing (400).

delete The method according to claim 1,
The molding hole 520 on one side of the first housing 500, the space between the bobbin and the first housing, and the molding hole 327 of the cap 320 are filled by the plastic injection molding during the second housing formation. 1 Housing clearance is maintained,
The connector part housing 610 to which the external connector is coupled and the PCB part housing 630 to which the PCB 700 is mounted are integrally formed, and the insert terminal is buried in the second housing to form an integral structure. 2, the hall sensor 750 and the PCB 700 are mounted on the PCB part housing 630 on one side of the housing, and a cover 637 is formed on the PCB.
Epoxy is coated around the cover 637, but the epoxy 633 is formed inside the PCB part housing 630 so that the partition 631 is formed inside the PCB part housing 630. Engine cooling control device characterized in that.
In the engine cooling control apparatus for operating the valve by generating a magnetic force formed from a coil located on the outer circumference of the main shaft 800 connected to the crank shaft,
A valve 100 formed at an outer side of the main shaft and configured to control a flow of oil flowing into the oil seal;
A concave-convex conductor 200 positioned below the valve and rotating together with a cooling fan;
A plastic part including a connector part housing and a connector part housing and a neighboring PCB part housing formed near the uneven block portion of the conductor and having a hall sensor 750 therein, and having a pin connected to an external connector on one side thereof. A second housing 600 formed of;
Includes; the first housing 500 is equipped with a bobbin coil wound therein;
The hall sensor 750 and the PCB 700 are mounted on the PCB part housing 630 of one side of the second housing, and a cover 637 is formed on the upper part of the PCB, and epoxy is sealed around the cover 637 to be sealed. In order to prevent flow into the PCB during epoxy injection, a partition 631 is formed inside the PCB part housing 630 for an epoxy accommodation space.

The lower portion of the valve is further provided with a flux path 150 to increase the magnetic force, the flux path is formed of a horizontal portion (B) and the downward projection (A), the flux when the valve is closed (closed) The horizontal part of the path is close to the conductor 200, and in the open state, the downward protrusion of the flux path is close to the conductor, and the flow of magnetic force lines flows from the downward protrusion A to the conductor, and at the same time, the upper and lower plates 111 and 112. Engine cooling control device characterized in that the magnetic force flows to the conductor through the horizontal portion (B) in the. In the engine cooling control apparatus for operating the valve by generating a magnetic force formed from a coil located on the outer circumference of the main shaft 800 connected to the crank shaft,
A valve 100 formed at an outer side of the main shaft and configured to control a flow of oil flowing into the oil seal;
A concave-convex conductor 200 positioned below the valve and rotating together with a cooling fan;
A plastic part including a connector part housing and a connector part housing and a neighboring PCB part housing formed near the uneven block portion of the conductor and having a hall sensor 750 therein, and having a pin connected to an external connector on one side thereof. A second housing 600 formed of;
Includes; the first housing 500 is equipped with a bobbin coil wound therein;
The valve is provided with a bar-shaped guide bent downward in the 'c' shape, by the bent portion of the guide engine cooling control device to be concentrated toward the conductor without dispersing the magnetic field to the outside.

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