KR102431498B1 - Reconfigurable engine mount for vehicles - Google Patents

Abstract

The present invention is a variable engine mount (1) for a vehicle that is excellent in noise and vibration (NVH), driving sensation (R&H) and ride performance by easily changing stiffness and hydro frequency, and the present invention is a cover part 100, a rubber part 200 ), the hydro part 300 and the bracket 400 are assembled by the coupling means 500, and the hydro frequency is changed by the rotation of each part to provide noise and vibration (NVH), driving sensation (R&H) and ride performance. was made to increase The coupling means 500 has a concentric circle on the inner lower portion and first and second coupling portions 110 and 120 having different inner diameters are formed, and a cover portion 100 having a third coupling portion 130 in the outer middle portion, In order to be coupled to the first coupling part 110 , the rubber part 200 having a first external screw 201 formed on the outside of the lower end thereof is coupled to the second coupling part 120 after the rubber part 200 is coupled. It consists of a hydro part 300 having a second male screw 301 formed on the outside, and a bracket 400 having a female screw 401 formed on the inside to be coupled to the third coupling part 130 .

Description

Reconfigurable engine mount for vehicles

The present invention relates to a variable engine mount for a vehicle. Specifically, the present invention relates to a variable engine mount for a vehicle that is excellent in noise and vibration (NVH), driving sensation (R&H) and riding performance by easily changing stiffness and hydro frequency.

In general, the engine of an automobile generates vibration and noise due to the vertical reciprocating motion of the piston and the connecting rod provided therein, the rotational inertia force of the crankshaft connected to the vertical reciprocating connecting rod, and the shaking generated in the longitudinal direction when the crankshaft rotates.

In order to prevent the vibration and noise generated for this reason from being transmitted to the vehicle body, the engine is mounted on the vehicle body by using an engine mount made of a rubber material having a predetermined elasticity.

However, the rubber engine mount exhibits excellent absorption and damping performance for high-frequency micro-amplitude vibrations among vibrations that occur during engine start-up, but is very vulnerable to low-frequency large displacement vibrations. There is a disadvantage that it cannot fully satisfy all of the vibrations of low frequency and large displacement.

Accordingly, a fluid-filled engine mount capable of absorbing and damping all vibrations over a wide range including high-frequency micro-amplitude vibration and low-frequency large displacement vibration input to the engine mount according to the operation of the engine is used.

In particular, in recent years, active mounts, semi-active mounts, and the like that can prevent NVH (Noise, Vibration, Hardness) from lowering have been widely used in order to improve fuel efficiency of a vehicle.

Various types of such semi-active mounts are disclosed in Korean Patent Publication Nos. 10-2013-0003749 and Korean Patent Publication Nos. 10-2013-0003751.

Usually, the semi-active mount is a method of controlling the dynamic characteristics of the mount in an ON/OFF method.

These semi-active mounts are divided into a volume-stiffness method and a bypass method, and the implementation method and the tendency of the appearing dynamic characteristics are different.

In general, a bypass method that exhibits low characteristics (about 0.6 copper magnification) in a low frequency region (20-40 Hz) is mainly used for diesel engines.

The reason is that the bypass method has the advantage of maximizing idle performance by having lower dynamic characteristics in the low frequency region compared to the volume stiffness method (the advantage of volume stiffness is lower high frequency dynamic characteristics compared to bypass, and the disadvantage is that the low frequency dynamic characteristics are higher than bypass).

Most commonly used bypass types use vacuum pressure (intake manifold), which has several disadvantages such as loss of layout or combustion back pressure.

On the other hand, compared to vacuum pressure, the electronic type uses the electromagnetic force generated by the vehicle, so there is no damage to the combustion pressure, so it does not affect the output. Its application is gradually increasing.

As an example, Korean Patent Publication No. 10-1628532 "Active engine mount for automobile" is disclosed.

The configuration will be described with reference to FIG. 1 as follows.

An upper body portion 12 having a main rubber 10 and an upper liquid chamber 11, a lower body portion 13 coupled to a lower portion of the upper body portion 12, and the upper and lower body portions 12 and 13 An orifice disk 16 that partitions an upper liquid chamber 11 and a lower liquid chamber 14 while being installed inside the and has an orifice 15 for inducing fluid flow between the upper and lower liquid chambers 11 and 14; The diaphragm 17 is installed in the lower part of the orifice disk 16 in the interior of (12, 13) and forms the lower liquid chamber 14, and the plunger 18 is installed in the lower body part 13 through the plunger 18. It includes a semi-active 19 that is in contact with the central part of the diaphragm and operates ON/OFF in an electromagnet type, is supported on the central part of the diaphragm side, is coupled to the bottom of the switching valve 21, and air between the switching valve 21 and the A fork 23 forming the chamber 22 is configured.

Therefore, in the active engine mount for automobiles configured as described above, a section arranged at the edge of the orifice 15 is covered while the ring-shaped excitation plate 24 is installed on the upper surface of the orifice disk 16, and with this The fluid inlet hole 25 is formed at the end of the edge section of the orifice 15 and the central section of the orifice 15 communicates with the upper liquid chamber 11 side, so that the fluid flows from the upper liquid chamber ↔ the center of the orifice ↔ the orifice ↔ It is possible to go back and forth between the upper liquid chamber 11 and the lower liquid chamber 14 while moving along the path of the fluid inlet hole ↔ the lower liquid chamber.

In addition, between the switching valve 21 and the fork 23, a sealed air chamber 22 that can serve as an air spring can be formed.

The switching valve 21 and the fork 23 as described above move up and down according to the plunger operation when the semi-active 19 is turned ON/OFF to open or close the hole 20 in the orifice disk 16. do.

However, the active engine mount for automobiles has problems in that it takes a lot of time to assemble and it is difficult to prepare a sample.

That is, it is necessary to change the hydro frequency for the development of mount rigidity and ride performance for NVH development.

As for the current tuning method, mount sample production with changed stiffness -> NVH development -> hydro tuning frequency change sample production -> ride development -> engine mount gap change sample production -> ride development -> NVH performance test.

At this time, in order to perform the performance test, there is a problem that a large number of engine mount samples are needed to verify various performances because performance evaluation is possible by changing only some of the mount design factors.

In addition, the consistency of the sample cannot be maintained, and in particular, it is difficult to change only to hydro because it must be kept the same due to the nature of the rubber.

In addition, a sample production period is required, which usually takes about two weeks to obtain a tuning sample.

In addition, it is difficult to develop integrated performance. In particular, there are many difficulties in selecting NVH and Ride performance integrated samples.

In addition, it is difficult to set the rubber secondary rigidity. In general, there is a problem that numerous trials and errors are repeated for detailed setting.

Accordingly, the present invention proposes a method of simply assembling a cover part, a rubber part, a hydro part, and a bracket for each specification, and then simply assembling it when evaluating the sample as a way to solve the above problems.

1. Korean Patent Registration No. 10-1428277 (Aug. 01, 2014)

1. Korean Patent Registration No. 10-1288995 (published on July 17, 2013)

1. Korean Patent Publication No. 10-2014-0044485 (published on April 15, 2014)

An object of the present invention is to provide a variable engine mount for a vehicle in which the engine mount is composed of a cover part, a rubber part, and a hydro part, and these are manufactured and assembled in a screw fastening method, so that the hydro damping value and frequency can be freely changed.

Another object of the present invention is to make it possible to change the front and rear stiffness because both the inside and outside of the engine mount cover are assembled using screws.

Another object of the present invention is that the diameter of the engine mount cover part can be changed and the upper and lower/front and rear gaps can be changed (by the rotation angle) so that excellent effects in noise and vibration (NVH) and driving sensation (R&H) can be obtained. is in

The above and other objects of the present invention can all be achieved by the present invention described below.

Variable engine mount for vehicle of the present invention,
The cover part 100, the rubber part 200, the hydro part 300 and the bracket 400 constituting the engine mount are assembled by the coupling means 500,
The coupling means 500 has a concentric circle on the inner lower portion, the first and second coupling portions 110 and 120 having different inner diameters are formed, the cover portion 100 having a third coupling portion 130 in the outer middle portion; and
a rubber part 200 having a first male screw 201 formed on the outside of the lower end to be coupled to the first coupling part 110; and
After the rubber part 200 is coupled, the hydro part 300 in which a second external screw 301 is formed to be coupled to the second coupling part 120 ; and

It is composed of a bracket 400 having a female screw 401 formed therein so as to be coupled to the third coupling part 130, and the gap between the cover part and the rubber part is adjusted by the rotation of each part, thereby changing the hydro frequency to reduce noise and noise. It is characterized by improving vibration (NVH), driving sensation (R&H) and riding performance.

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In addition, the first and second coupling parts 110 and 120 formed on the cover part 100 are made of a female screw, and the third coupling part 130 is a male screw.

In addition, the ribs 101 are formed on both sides of the inner side of the cover so that the gap with the rubber part 200 can be adjusted when the cover part 100 is rotated.

In addition, the cover part 100 performs the upper and lower front and rear gap tuning, the rubber part 200 performs front and rear, up and down direction stiffness tuning, and the hydro part 300 serves for damping value and frequency tuning, respectively, and the bracket 400 is It is characterized in that it is fastened to the vehicle body by screws.

In addition, the rubber part 200 and the hydro part 300 is characterized in that it is assembled in a storage tank (not announced) containing the fluid.

In addition, it is characterized in that it further includes an O-ring (320) for preventing leakage between the rubber part 200 and the hydro part 400.

The variable engine mount capable of changing the engine mount characteristic value of the present invention can obtain the following effects.

First, the engine mount consists of a cover part, a rubber part, and a hydro part, and by manufacturing and assembling each of them in a screw fastening method, the hydro damping value and frequency can be freely changed.

Second, since both the inside and outside of the engine mount cover are assembled using threads, the front and rear stiffness can be changed.

Third, it is possible to change the diameter of the engine mount cover part and to change the up/down/front/rear gap (by rotation angle), so the noise and vibration (NVH) and driving sensation (R&H) are excellent.

1 is a view showing a cross-section of a conventional vehicle engine mount.
2 is an exploded cross-sectional view of the variable engine mount for a vehicle according to the present invention.
3 is an assembled cross-sectional view of the variable engine mount for a vehicle according to the present invention.
4 (a) (b) is a cross-sectional view showing the cover part and the rubber part constituting the variable engine mount for a vehicle according to the present invention,
(a) is a view showing the state of the gap with the rubber part before rotation of the cover part,
(b) is a view showing the state of the gap with the rubber part after the cover part rotates.

Hereinafter, based on the accompanying drawings, the present invention will be described in detail so that those of ordinary skill in the art can easily implement it. However, the present invention may be embodied in various different forms and is not limited to the embodiments described herein.

In order to clearly describe the present invention, parts irrelevant to the description are omitted, and the same reference numerals are assigned to the same or similar elements throughout the specification.

In addition, the terms or words used in the present specification and claims should not be construed as being limited to their ordinary or dictionary meanings, and the inventor appropriately defines the concept of the term in order to best describe his invention. It should be interpreted as meaning and concept consistent with the technical idea of the present invention based on the principle that it can be done.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 2, the variable engine mount 1 for a vehicle of the present invention is basically composed of a cover part 100, a rubber part 200, a hydro part 300 and a bracket 400, which are coupled means ( 500) is combined.

The cover part 100 has a concentric circle on the inner lower part and first and second coupling parts 110 and 120 having different inner diameters and a third coupling part 130 are respectively formed in the outer middle part, and the first and second coupling parts are respectively formed. The parts 110 and 120 are made of a female screw, and the third coupling part 130 is made of a male screw.

At this time, the ribs 101 are formed on both sides of the inside of the cover part 100 so that the gap with the rubber part 200 can be adjusted when the cover part 100 is rotated.

That is, as shown in FIG. 4, the cover part 100 is rotated 90° as shown in FIG. When , the gap (a-1) between the rib 101 and the rubber part 200 becomes smaller.

Therefore, it is possible to adjust the gap by the rotation of the cover part 100 and fluctuation of the vertical position.

The rubber part 200 is formed of a rubber material, so that it is possible to implement a damping effect on the road surface excitation of the engine mounted device according to the present invention.

The rubber unit 200 includes an insulator rubber 210 having a first liquid chamber 211 and a core 220 having a bolt 221 on the insulator rubber 210 to transmit an external load to the engine mount. do.

In addition, a first male screw 201 for screw-fitting the first coupling part 110 formed inside the cover part 100 is formed on the outside of the rubber part 200 .

As shown in FIG. 3 , the rubber part 200 is also driven by a gap (a) difference with the cover part 100 caused by rotation in a certain direction inside the cover part 100, that is, up and down movement. The sense (R&H) can be freely changed, and the resulting noise and vibration (NVH)(b) stiffness can be freely changed.

After the rubber part 200 is coupled to the outside of the hydro part 300 , a second male screw 301 is formed to be coupled to the second coupling part 120 formed inside the cover part 100 .

A bellow having a second liquid chamber 302 is integrally formed in the hydro unit 300, and a membrane 310 is integrally formed on the upper surface of the second liquid chamber to reduce vibration transmitted to the engine mounting. is formed with

At this time, it is preferable to assemble the rubber part 200 and the hydro part 300 in water in order to maintain the performance of assembling the hide part 300 .

In addition, an O-ring 320 for preventing oil leakage is installed between the rubber part 200 and the hydro part 300 .

The bracket 400 is provided with a male screw 401 for screw-fitting to the third coupling portion 130 formed at an outer midpoint of the cover portion 100 .

The bracket 400 is fastened to the vehicle body by welding or bolts and nuts.

The coupling means 500 is composed of male and female screws respectively formed on the cover portion 100 , the rubber portion 200 , and the bracket 300 .

The coupling means 500 is not necessarily limited to screws, and various fastening methods other than screw fastening may be devised.

The variable engine mount 1 for a vehicle configured as described above is separately manufactured by the cover part 100, the rubber part 200, the hydro part 300, and the bracket 400, but these are attached to the coupling means 500 made of male and female screws. It is a structure that is joined by

That is, after screwing the male screw part 201 formed in the rubber part 200 to the first coupling part 110 formed inside the cover part 100, the second coupling part formed at the lower end of the cover part 100 ( 120), the male screw 301 formed in the hydro part 300 was screwed.

At this time, as mentioned above, the assembly of the hydro part 300 and the rubber part 200 is combined in a storage tank (not shown) containing the hydro liquid to increase the sealing property.

Next, the bracket 400, that is, the third coupling part 130 formed at the outer midpoint of the cover part 100, of the assembled vehicle variable engine mount 1 as described above is screwed with the female screw formed inside the bracket 400. Then, it is mounted on the vehicle body using bolts and nuts.

Therefore, the present invention can maintain the consistency of the sample by changing only some factors of the mount design factors to perform performance evaluation, and the problem of slow mass production because it is made of complex and various parts as in the prior art, and for performance testing.

In addition, the sample production period can be significantly reduced. Usually, it takes about two weeks to obtain a tuning sample, but the present invention can be made individually to shorten the time.

In particular, the present invention solves the problem of difficulty in selecting an integrated sample such as NVH and riding performance, and difficult to set the secondary rigidity of the rubber part, by using the gap adjustment between the cover part 100 and the rubber part 200 .

Although the present invention has been described with reference to the above preferred embodiments and the accompanying drawings, other embodiments may be configured within the spirit and scope of the present invention. Accordingly, it should be construed that the scope of the present invention is defined by the appended claims and not limited by the specific embodiments described herein.

1: Variable engine mount for vehicle
100: cover part
101: fat
110, 120, 130: coupling part
200: rubber part
201,301: male thread
210: insulator rubber
211: first liquid chamber
220: core
300: hydro part
302: second liquid chamber
310: membrane
400: bracket

Claims (7)

The cover part 100, the rubber part 200, the hydro part 300 and the bracket 400 constituting the engine mount are assembled by the coupling means 500,
The coupling means 500 has a concentric circle on the inner lower portion, the first and second coupling portions 110 and 120 having different inner diameters are formed, the cover portion 100 having a third coupling portion 130 in the outer middle portion; and
a rubber part 200 having a first male screw 201 formed on the outside of the lower end to be coupled to the first coupling part 110; and
After the rubber part 200 is coupled, the hydro part 300 in which a second external screw 301 is formed to be coupled to the second coupling part 120 ; and
It is composed of a bracket 400 having a female screw 401 formed therein to be coupled to the third coupling part 130, and the gap between the cover part and the rubber part is adjusted by the rotation of each part, thereby changing the hydro frequency to reduce noise and noise. A variable engine mount for a vehicle, characterized in that it improves vibration (NVH), driving sensation (R&H) and riding performance.
delete The method of claim 1,
The variable engine mount for a vehicle, characterized in that the first and second coupling parts (110, 120) formed on the cover part (100) are made of a female screw, and the third coupling part (130) is a male screw.
The method of claim 1,
A variable engine mount for a vehicle, characterized in that the cover is formed on both sides of the inner side of the cover so that the gap with the rubber can be adjusted when the cover is rotated.
The method of claim 1,
The cover part performs gap tuning in the vertical and longitudinal directions, the rubber part performs front-to-back and vertical stiffness tuning, and the hydro part serves for damping value and frequency tuning, respectively, and the bracket is a variable engine mount for a vehicle, characterized in that it is fastened to the vehicle body by screws.
The method of claim 1,
The rubber part 200 and the hydro part 300 is a variable engine mount for a vehicle, characterized in that it is assembled in a storage tank containing a fluid.
The method of claim 1,
A variable engine mount for a vehicle, characterized in that it further includes an O-ring (320) for preventing oil leakage between the rubber part 200 and the hydro part 400.

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