KR20130028188A - Active hood system for vehicle - Google Patents

Abstract

PURPOSE: An active hood device for a vehicle is provided to absorb impacts applying to pedestrians by ascending the front end of a hood with the rear end of the hood in order to push up the pedestrians when the vehicle and the pedestrians collide. CONSTITUTION: An active hood device for a vehicle comprises a main frame(10), a hood latch assembly(20), and a latch actuator(30). The main frame is fixed on the vehicle body. The hood latch assembly is mounted on the main frame to be lifted. The hood latch assembly locks and unlocks the front end of the hood. The latch actuator ascends the latch assembly depending on the control signal of a controller which receives impact detecting signals from an impact detecting sensor. The latch actuator is mounted in between the main frame and the hood latch assembly. The latch actuator comprises an electromagnet assembly(60) to assist the operation of the latch actuator.

Description

Active hood system for vehicle

The present invention relates to an active hood device for automobiles, and more particularly, to an active hood device for automobiles that can reduce the injuries of pedestrians by raising the front end of the hood together with the rear end of the hood during a pedestrian collision.

In general, an engine compartment is provided at the front of the vehicle, and the engine compartment is opened and closed by a hood.

In the vehicle, the hood not only functions to open and close the engine room but also shields the engine room to block engine noise, and the left and right sides of the rear end are coupled to the upper part of the engine room via the hood hinge assembly to center the hood hinge assembly. Rotate to open and close the engine room.

However, the hood is known to cause serious injury to pedestrians when a pedestrian collides, and an active hood system is used to secure a space for absorbing the impact energy of a pedestrian between the hood and the engine room when a collision occurs. It is becoming.

The active hood device raises the rear end (or hood hinge assembly) of the hood to protect the pedestrian in the event of a collision.It is a pedestrian protection device that cushions pedestrian shocks and reduces injuries. When the sensor of the front bumper detects a pedestrian collision, the controller operates the actuator according to the detection signal of the sensor to raise the rear end of the hood to secure a buffer space between the hood and the engine room.

Referring to the configuration of the active hood device with reference to the drawings, as shown in Figure 1, the collision detection signal of the pedestrian collision detection sensor 40 and the collision detection sensor 40 for detecting a pedestrian collision mounted on the vehicle bumper side And a controller 42 for driving the hinge actuator 50 to be mounted to the vehicle body part in the engine room at the rear left and right sides of the hood 44 so as to lift while supporting the hood hinge assembly (not shown). It comprises a hinge actuator 50.

At this time, when the controller 42 receives the collision detection signal of the collision detection sensor 40 to drive the hinge actuator 50, the hood hinge assembly is raised by the driving of the hinge actuator 50, and at the same time the hood The rear end of the hood 44 to which the hinge assembly is coupled is pushed up to cushion the pedestrian.

However, the conventional active hood device has a disadvantage in that the pedestrian buffering function and the injury reduction function are somewhat deteriorated because only the rear end of the hood is raised to push up only a part of the body of the pedestrian.

Therefore, the present invention was created to solve the above problems, and is configured to raise the front end portion of the hood together with the rear end portion of the hood during a pedestrian collision, thereby pushing up and buffering the pedestrian while the entire area of the hood is raised. In addition, the object of the present invention is to provide an active hood device for automobiles that can further improve pedestrian protection by reducing pedestrian injury.

It is also an object of the present invention to provide an active hood device for an automobile that can easily restore the front end of the hood after the crash accident to its original state.

In order to achieve the above object, the present invention is to raise the front end of the hood during a pedestrian collision accident,

A main frame fixed to the vehicle body;

The main frame and hood latch assembly is mounted to the main frame so as to raise the hood latch assembly for locking and releasing the front end of the hood according to the control signal of the controller that has received the collision detection signal of the collision detection sensor. In the active hood device for a vehicle comprising: a latch actuator mounted between,

The latch actuator,

It is provided between the mainframe and the hood latch assembly, and provides an active hood device for an automobile comprising an electromagnet assembly for assisting the operating force of the latch actuator for raising the hood latch assembly with the repulsive force generated between the electromagnet.

Here, the electromagnet assembly, the first electromagnet is fixed to the hood latch assembly and provided to be raised and lowered integrally with the hood latch assembly; And a second electromagnet fixed to the main frame and disposed below the first electromagnet, wherein the first electromagnet and the second electromagnet are N poles and S poles, respectively, by the current applied under the control of a controller. It is characterized in that it is provided to have a polarity of.

In addition, the controller generates a repulsive force by controlling the application of current so that the opposite ends of the first electromagnet and the second electromagnet disposed up and down when receiving a collision detection signal of the collision detection sensor in the case of a pedestrian collision accident have the same polarity. It features.

In addition, the controller is characterized in that the attraction is generated by controlling the application of current so that the opposite ends of the first electromagnet and the second electromagnet disposed up and down when the hood latch assembly and the front end of the hood of the hood is restored downward .

Accordingly, the active hood device according to the present invention is configured to raise together the rear end of the hood and the front end of the hood during the pedestrian collision, thereby pushing up and buffering the pedestrian while the entire hood area is raised. This improves the pedestrian protection of the entire area of the hood, thereby reducing the pedestrian injury significantly compared to the prior art.

In addition, the front end of the hood has an advantage that can be easily restored by the force of the electromagnet after the crash.

1 is a view showing the configuration of a conventional active hood device for automobiles.
2 is a view showing the configuration of an active hood device for a vehicle according to the present invention.
3 and 4 are perspective views showing the latch actuator of the active hood device for a vehicle according to the present invention.
5 and 6 are a front view and a rear view showing a latch actuator of the active hood device for a vehicle according to the present invention.
Figure 7 is a rear view showing the hood lock and release operation of the normal hood latch assembly in the active hood device for a vehicle according to the present invention.
8 and 9 are a front view and a rear view showing an operating state of the latch actuator for raising the front end portion of the hood in the pedestrian collision accident in the active hood device for automobiles according to the present invention.
10 is a rear view showing an operating state of a latch actuator for restoring the front end of the hood after the crash in the active hood device for a vehicle according to the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains.

The present invention relates to an active hood device for an automobile, wherein a latch actuator is added to an existing hinge actuator so that the rear end of the hood is raised by the existing hinge actuator in the event of a pedestrian collision, and the front end of the hood is also provided by the latch actuator. The configuration is to increase, the main focus is to increase the pedestrian shock buffering effect and pedestrian injury reduction effect.

2 is a view showing the configuration of an active hood device for a vehicle according to the present invention.

As shown, the active hood device for a vehicle according to the present invention, a collision detection sensor 40 mounted on the side of the vehicle bumper to detect the pedestrian collision, in order to raise the rear end of the hood 44 during a pedestrian collision accident, collision detection A controller 42 for receiving a collision detection signal of the sensor 40 and outputting a control signal for raising the rear end of the hood 44, and a hood hinge assembly mounted to the vehicle body in the engine room on both sides of the rear end of the hood 44. It includes a hinge actuator (50) provided to support (not shown) to raise the hood hinge assembly in accordance with the control signal output from the controller 42.

In addition, the active hood device for automobiles according to the present invention locks and unlocks the front end of the hood 44 in order to raise the front end of the hood 44 together with the rear end of the hood in the event of a pedestrian collision. It further comprises a latch actuator 30 provided to raise the hood latch assembly 20.

In addition, when the controller 42 receives the collision detection signal of the collision detection sensor 40, the controller 42 simultaneously raises the control signal for raising the front end of the hood 44 together with the control signal for raising the rear end of the hood 44. It is provided to output.

That is, the controller 42 operates the hinge actuator 50 and the latch actuator 30 together in the event of a pedestrian collision, thereby allowing the front and rear ends of the hood 44 to rise together.

In the present invention, in order to raise the front end of the hood 44, the hood latch assembly 20 is mounted on the vehicle body so as to be able to lift and lower, and in the event of a pedestrian collision, the hood latch assembly 20 is used by the latch actuator 30. Raise.

The hood latch assembly 20 is mounted to the main frame 10 fixed to the vehicle body in a liftable manner, and the latch actuator 30 has the main frame 10 and the hood so as to lift the hood latch assembly 20. It is installed between the latch assembly 20.

The main frame 10 has a shape in which a central portion thereof is bent into a c-shape, and a first slot 11 and a second slot 12 cut in a vertical direction in the central portion and both side portions thereof are formed therethrough. Both ends are assembled and fixed to the vehicle body side (body portion in the engine compartment at the front end of the hood).

The hood latch assembly 20 is disposed inside the mainframe 10 and is mounted to be lifted from the mainframe 10 by the operation of the latch actuator 30 in the event of a pedestrian collision.

Here, the configuration of the hood latch assembly 20 will be described with reference to FIGS. 3 to 6.

A body plate 22 serving as a skeleton of the hood latch assembly 20 is provided, and the body plate 22 is a rectangular plate body, and a striker 46 integrally formed with the hood 44 is separated from the top of the body plate 22. The first inserting portion 21 is formed to be inserted into the insert, and the front and both side surfaces of the first inserting pin 21 and the second guide pin 14 are integrally formed.

The first guide pin 13 of the body plate 22 is inserted into the first slot 11 formed on the front of the main frame 10 to be lifted, and at the same time the second guide pin 14 is the main frame 10 It is inserted into the second slot 12 formed on both sides of the liftable.

At this time, the subplate 24 having a smaller area is spaced apart from the rear surface of the body plate 22, and a second inserting portion 23 corresponding to the first inserting portion 21 is formed on the upper portion of the subplate 24. do.

In addition, the upper side of the body plate 22 is equipped with a hood release cable 48, the hood release cable 48 is mounted so that it can be pulled by the operation of the lever (not shown) mounted to the driver's seat.

In addition, the locking lever 26 is rotatably mounted in one of the spaces between the body plate 22 and the auxiliary plate 24. The upper end of the locking lever 26 is connected to the hood release cable 25, and is locked. The lower end of the lever 26 is hinged to one side of the auxiliary plate 24.

As a means for providing an elastic restoring force to the lock lever 26, the lower hinge fastening point of the lock lever 26 is elastically restored to rotate the lock lever 26 pulled by the hood release cable 48 and rotated. The first spring 27 is provided.

One end of the first spring 27 is fixed to the side end of the body plate 22, the other end of the second spring 27 is fixed to the upper end of the locking lever 26, the first spring 27 connected in this way ) Is elastically restorable when the locking lever 26 is pulled and rotated by the hood release cable 25, and becomes the elastic lever when the pull of the hood release cable 25 is released. Rotate to restore.

In addition, the latch plate 25 is rotatably mounted on the other side of the space between the body plate 22 and the auxiliary plate 24. The first inserting portion 21 and the second inserting portion are provided at one end of the latch plate 25. A third insertion portion 28 into which the striker 46 inserted through the insertion portion 23 is lockably inserted is formed, and the other end of the latch plate 25 is hinged to the other side of the auxiliary plate 24.

As a means for providing an elastic restoring force to the latch plate 25, a second spring 29 in the form of a tension spring is provided, and one end of the second spring 29 is fixed to the side end of the body plate 22. The other end of the second spring 29 is fixed to the other end of the latch plate 25.

The second springs 29 thus connected are tensioned when the latch plate 25 is rotated to the striker lock position and provide elastic resilience when the latch plate 25 is rotated to the striker lock release position.

On the other hand, the upper end of the lock lever 26, the locking hook 16 is formed integrally protruding, and the upper end of the latch plate 25, the locking jaw 15 to which the locking hook 16 is hooked is formed integrally protruding When the latch plate 25 is in the locked position of the striker 46, the locking hook 16 of the lock lever 26 is caught by the latching jaw 15 of the latch plate 25, thereby causing the latch plate 25 to be closed. It locks to prevent rotation.

Next, a configuration of the latch actuator of the present invention will be described with reference to FIGS. 8 and 9.

First, the lifting lever 33 is hinged to the main frame 10 to be rotatably mounted, and the first guide pin formed on the body plate 22 of the hood latch assembly 20 at one end of the lifting lever 33. A locking groove 31 into which the 13 is lockably inserted is formed.

In addition, the lifting lever (33) is pushed to the upper end of the pushing groove (32) for upwardly pushing the first guide pin (13) upwardly, and the hinge fastening point of the center of rotation of the lifting lever (33) The third spring 34 in the form of a coil spring provides an elastic restoring force for elastically rotating the lift lever 33 to raise the hood latch assembly 20 through the first guide pin 13.

In addition, the main frame 10 is mounted so that the stop lever 36 which normally restrains the rising lever 33 and releases the restraint in the case of a pedestrian collision is rotatable. One end of the stop lever 36 is connected to the main frame 10. The hinge is fastened to the hinge fastening point of the stop lever 36, and a fourth spring 38 having a coil spring shape that is elastically restorable upon rotation for release of the stop lever 36 is mounted.

At this time, the other end of the stop lever 36 is formed with a locking groove 35 to which the end of the lifting lever 33 is fitted.

In addition, the driving device 37 is mounted to push the locking groove 35 of the stop lever 36 at a predetermined position of the main frame 10 to release the locking lever, that is, to release the restraint. Preferably, the vertical end 39 is further integrally formed to be in close contact with the piston of the driving device 37 directly below the locking groove 35 of the stop lever 36 so as to be easily pushed.

The driving device 37 may be a piston operating method for rotating the stop lever 36 in the lock release direction by pressing the vertical end 39 of the stop lever 36 as the piston moves forward.

Piston actuated drive device 37 may be a gunpowder that the piston is advanced by the explosive force of the gunpowder, or a solenoid type that the piston is advanced by the solenoid (electromagnet).

Meanwhile, in the active hood device of the present invention, the latch actuator 30 is mounted between the main frame 10 and the hood latch assembly 20, and receives a collision detection signal from the collision detection sensor 40 during a pedestrian collision accident. In response to the control signal of 42, the hood latch assembly 20 and the electromagnet assembly 60 operative to assist in raising the front end of the hood 44.

The electromagnet assembly 60 is a component that assists the operation force of the latch actuator 30 for pushing up the hood latch assembly 20 upwards, and an auxiliary force for pushing up the hood latch assembly 20 upwards ( Additional force).

In more detail, the force that pushes up the hood latch assembly 20 upward, that is, the actuation force of the latch actuator 30, arises from the elasticity of the third spring 34. The elastic restoring force of the 34 acts as a force for elastically rotating the lifting lever 33, and the pushing end 32 is the first guide pin 13 when the lifting lever 33 is elastically rotated by the third spring 34. ) And the hood latch assembly 20 is pushed upward to raise the hood latch assembly 20, so that the front end portions of the striker 46 and the hood 44 are raised together.

Accordingly, the elastic restoring force of the third spring 34 becomes a force that raises the front end portions of the hood latch assembly 20 and the hood 44, that is, the actuation force of the latch actuator 30, wherein the electromagnet assembly 60 has a third force. The elastic restoring force of the spring 34 is assisted to raise the front end portions of the hood latch assembly 20 and the hood 44 quickly and reliably.

In addition, the electromagnet assembly 60 may serve to restore the front end portions of the hood latch assembly 20 and the hood 44 to the original state, that is, the state before the accident, after the pedestrian collision, which will be described in detail later. Let's do it.

The electromagnet assembly 60 is disposed on both the left and right sides of the hood latch assembly 20 inside the main frame 10, and the two electromagnet assemblies on both the left and right sides are respectively arranged up and down, namely, the two electromagnets 61 and 62. It consists of the 1st electromagnet 61 of the and the 2nd electromagnet 62 of the lower side.

Since the electromagnet assemblies 60 are disposed on both the left and right sides of the hood latch assembly 20, the first electromagnets 61 are arranged on both the left and right sides of the hood latch assembly 20, so that the total number of the first electromagnets 61 is two. Since it is arrange | positioned below each 1st electromagnet 61, it becomes two in total.

The two first electromagnets 61 are integrally fixed to both side portions of the hood latch assembly 20, more specifically, to both side portions of the body plate 22, the first electromagnet 61 and the hood latch assembly 20. ) Is moved up and down integrally.

In addition, the two second electromagnets 62 are disposed below the first electromagnets 61 and fixed to the main frame 10.

An electromagnet is a magnet that becomes magnetized when current flows and returns to its original non-magnetized state when disconnected. It is distinguished from a permanent magnet that always maintains its magnetization regardless of the supply of current. By using the principle that a concentric magnetic field is formed, there is an advantage that a very strong magnetic field cannot be obtained with a permanent magnet.

The simplest form of electromagnet is a solenoid made by winding a coil around a cylindrical iron core, and when a current flows through the coil, the electromagnet has polarities of the north pole and the south pole, similar to the permanent magnet. Since the second electromagnet 62 is the same as the general electromagnet, detailed description thereof will be omitted.

In each electromagnet assembly 60, the first electromagnet 61 and the second electromagnet 62 are vertically arranged to be provided such that the upper and lower portions have the polarity of the N pole and the S pole when a current is applied to the coil.

Therefore, when the end portions of the first electromagnet 61 and the second electromagnet 62 facing each other are the same pole, the repulsive force pushing each other acts to pull each other.

The two electromagnet assemblies 60 on both the left and right sides of the latch actuator 30 are driven according to the control signal of the controller 42, and a current is applied to the coils of the first electromagnet 61 and the second electromagnet 62 for magnetization. Coils of the first electromagnet 61 and the second electromagnet 62 may be connected to the controller 42 through connectors and external conductors (not shown).

Therefore, when the controller 42 controls the current applied to the first electromagnet 61 and the second electromagnet 62, the operation (repulsion and attraction) of the two electromagnet assemblies 60 can be controlled. 42 includes a current controller (not shown) for controlling the current supply of the first electromagnet 61 and the second electromagnet 62.

Therefore, when the controller 42 receives the collision detection signal of the collision detection sensor 40 in the case of a pedestrian collision accident, the current controller of the controller 42 applies current to the first electromagnet 61 and the second electromagnet 62, respectively. By magnetizing the two electromagnets, thereby driving the electromagnet assembly 60 to raise the hood latch assembly 20.

That is, in the case of a pedestrian collision accident, the current control unit of the controller 42 applies a current to each electromagnet coil so that the opposite ends of the first electromagnet 61 and the second electromagnet 62 have the same polarity, and by the repulsive force generated at this time The first electromagnet 61 allows the second electromagnet 62 to be pushed up so that the first electromagnet 61 and the hood latch assembly 20 are integrally lifted.

In this manner the electromagnet assembly 60 is driven by the controller 42 to provide an auxiliary force to lift the hood latch assembly 20.

In addition, in the preferred embodiment of the present invention, the electromagnet assembly 60 may be controlled to serve to restore and lower the front end portions of the hood latch assembly 20 and the hood 44 which are raised after an accident occurs.

To this end, the controller 42 converts the polarity of any one of the first electromagnet 61 and the second electromagnet 62 to a polarity opposite to that in case of an accident, wherein the first electromagnet 61 and the second electromagnet 62 It is to control the application of the current to the electromagnet coil so that the opposite ends of the have opposite polarities.

In this restoration operation, the current control unit of the controller 42 applies a current to the first electromagnet 61 and the second electromagnet 62, but applies either of the two electromagnets in the opposite direction of the current flow direction as in the ascending operation. In this case, the opposite ends of the two electromagnets 61 and 62 have opposite polarities, so that a pulling force, that is, attraction force between the electromagnets is generated.

At this time, the first electromagnet 61 fixed to the hood latch assembly 20 is pulled down toward the second electromagnet fixed to the main frame 10 during the restoration operation by the manpower generated, thereby lowering the hood latch assembly 20. ) And the front end of the hood 44 can be restored to the original position.

In the present invention, the above restoration operation may be set to be performed by a switch operation or automatically performed after a set time has elapsed after a crash accident, for example, when a driver or another operator operates a restoration switch (not shown) installed in a vehicle. The controller 42 receives the operation signal of the restoration switch and restores the electromagnet assembly 60, or at the time when the set time elapses after the collision accident occurs (after raising the latch actuator), the electromagnet assembly 60 is automatically operated. Restore operation.

The electromagnet polarity conversion is industrially used and technical matters for the circuit configuration of the current controller that applies current to two electromagnets at a specific time in the controller and converts the flow direction of the current applied to the electromagnet if necessary, so that it is fully implemented in the technical level of those skilled in the art. Where possible, detailed description thereof will be omitted herein.

Hereinafter, an operation state of the active hood device for a vehicle of the present invention having the above configuration will be described.

Usual hood Latch  Release behavior of the assembly

As shown in FIG. 7, the hood latch assembly 20 normally performs a hood lock and release operation.

When the lever mounted on the driver's seat is operated to open the hood, the hood release cable 48 is pulled at the same time as the hood release cable 48 pulls the upper end of the lock lever 26 so that the lock lever 26 is rotated. The first spring 27 is rotated about the hinge fastening point of the lower end while compressing the elastically restorable.

As the lock lever 26 is rotated as described above, the lock hook 16 formed at the upper end thereof is separated from the latching jaw 15 of the latch plate 25.

At the same time, the latch plate 25 is rotated from the position at which the striker 46 of the hood is locked to the lock release position by the elastic restoring force of the second spring 29, and the latch plate 25 is rotated to form the third inserting portion ( The hood 44 on which the striker 46 is mounted is opened by pushing the striker 46 inserted into the cylinder 28 upward.

Hood during pedestrian crash Latch  Upward operation of the assembly and hood

When the collision detection sensor 40 detects a pedestrian collision, the collision detection signal is received by the controller 42 as described above, and the controller 42 drives the hinge actuator 50 (see FIG. 1). ).

In addition, the hood hinge assembly (not shown) is raised by the hinge actuator 50 at this time, so that the rear end of the hood 44 coupled to the hood hinge assembly is raised.

In addition, the front end of the hood 44 as well as the rear end of the hood 44 is raised together. When the piston of the driving device 37 is driven forward according to the control signal of the controller 42, the piston is a stop lever ( Pushing the vertical end 39 of 36, the stop lever 36 is rotated (see Figs. 8 and 9).

At the same time, the restraint of the lifting lever 33 that is restrained by the locking groove 35 of the stop lever 36 is released, and the lifting lever 33 is moved upward by the elastic restoring force of the third spring 34. It turns.

At this time, as the first guide pin 13 of the body plate 22 inserted into the locking groove 31 of the lift lever 33 is pulled out, the pushing up end 32 of the lift lever 33 is the first guide pin ( 13) will be pushed upwards.

Accordingly, the first guide pin 13 formed on the front surface of the body plate 22 of the hood latch assembly 20 rises along the first slot 11 of the main frame 10, and at the same time, The two guide pins 14 are raised along the second slot 12 of the main frame 10, so that the entire hood latch assembly 20 is raised.

As the hood latch assembly 20 rises, the striker 46 is pushed up together, and as a result, the front end of the hood 44 in which the striker 46 is installed is raised to serve to cushion the pedestrian.

As described above, while the lifting lever 33 is rotated to push up the first guide pin 13, the controller 42 is connected to the first electromagnet 61 and the second electromagnet 62 of the electromagnet assembly 60. Under control, a current is applied to assist in the forward lift operation of hood latch assembly 20 and hood 44.

At this time, the current controller of the controller 42 applies a current so that the end portions of the first electromagnet 61 and the second electromagnet 62 facing each other have the same polarity, and the hood is generated by the repulsion between the two electromagnets 61 and 62. The first electromagnet 61 fixed to the latch assembly 20 rises from the second electromagnet 62, and the lifting force of the first electromagnet 61 assists the lifting force of the hood latch assembly 20 and the hood 44. This results in a rapid ascent operation.

Hood after pedestrian crash accident Latch  Restoration operation of assembly and hood

When the user operates the restoration switch or when the set time has elapsed after the collision has occurred, the restoration operation of the electromagnet assembly 60 is performed under the control of the controller 42, wherein the current control unit of the controller 42 is configured to perform a first operation. An electric current is applied to the electromagnet 61 and the second electromagnet 62, and the second electromagnet 62 (or the first electromagnet) is applied with a current in a direction opposite to the flow direction of the current applied during the collision accident.

Accordingly, end portions facing each other of the first electromagnet 61 and the second electromagnet 62 have opposite polarities to each other, thereby generating attraction, and causing the hood latch assembly 20 to generate attraction between the two electromagnets 61 and 62. The first electromagnet 61 fixed thereto is pulled toward the second electromagnet 62 and lowered.

As a result, the front end of the hood latch assembly 20 and the hood 44, which were raised during the accident by the lowering of the first electromagnet 61, are lowered together and restored to the original position.

The embodiments of the present invention have been described in detail above, but the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are provided. Also included in the scope of the present invention.

10: mainframe 11: the first slot
12: second slot 13: the first guide pin
14: second guide pin 15: locking jaw
16 locking hook 20 hood latch assembly
21: first insertion part 22: body plate
23: second insertion portion 24: auxiliary plate
25 latch plate 26 locking lever
27: first spring 28: third insertion portion
29: second spring 30: latch actuator
31: locking groove 32: pushing up
33: hood lifting lever 34: third spring
35: locking groove 36: stop lever
37: actuator 38: fourth spring
39: vertical stage 40: collision detection sensor
42: controller 44: hood
46: Striker 48: Hood Release Cable
50: hinge actuator 60: electromagnet assembly
61: first electromagnet 62: second electromagnet

Claims (6)

In order to raise the front end of the hood in the event of a pedestrian collision,
A main frame fixed to the vehicle body;
The main frame and hood latch assembly is mounted to the main frame so as to raise the hood latch assembly for locking and releasing the front end of the hood according to the control signal of the controller that has received the collision detection signal of the collision detection sensor. In the active hood device for a vehicle comprising: a latch actuator mounted between,
The latch actuator,
And an electromagnet assembly installed between the mainframe and the hood latch assembly to assist the actuation force of the latch actuator for raising the hood latch assembly with the repulsive force generated between the electromagnets.
The method according to claim 1,
The electromagnet assembly,
A first electromagnet fixed to the hood latch assembly, the first electromagnet being provided to be movable up and down with the hood latch assembly;
And a second electromagnet fixed to the mainframe and disposed below the first electromagnet.
The first electromagnet and the second electromagnet are the active hood device for a vehicle, characterized in that the upper and lower portions are provided with a polarity of the N pole, S pole by the current applied under the control of the controller.
The method according to claim 2,
When the controller receives a collision detection signal of the collision sensor in the case of a pedestrian collision accident, the controller generates a repulsive force by controlling the application of current so that the opposite ends of the first electromagnet and the second electromagnet disposed up and down have the same polarity. Active hood device for cars.
The method according to claim 2,
The controller generates an attractive force by controlling the application of current so that opposite ends of the first electromagnet and the second electromagnet disposed up and down when the hood latch assembly and the front end of the hood are restored have opposite polarities. Active hood device for.
The method of claim 4,
And the controller controls the flow direction of the current applied to any one of the first electromagnet and the second electromagnet to be opposite to that of the pedestrian collision accident.
The method according to claim 1 or 2,
The electromagnet assembly is an active hood device for a vehicle, characterized in that provided on each of the left and right sides of the hood latch assembly.

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