KR100192463B1 - Hydraulic engine mount - Google Patents

Abstract

The present invention relates to a liquid-enclosed engine mount disposed between an engine and a body of an automobile to control the vibration and shock of the engine to block transmission of vibration and shock to the body. In a liquid-filled engine mount consisting of an elastic member and a diaphragm coupled to the elastic member to form a liquid chamber filled with a working liquid, the liquid compartment partitions the liquid chamber into a main liquid chamber and a sub liquid chamber and has a flow path formed therein so that the working liquid flows. A liquid encapsulated engine mount comprising a member and rubber means fixed to the diaphragm member so as to partition the flow path formed on the diaphragm member and the liquid injection chamber to reduce the volume of the flow passage at low frequency vibration. Operation that flows from the liquid chamber by reducing the volume of the flow path when vibration occurs Attenuation value and the spring constant by increasing the friction force of the material is increased, so is the impact can be easily controlled than.

Description

Liquid-filled engine mounts

1 is a structural diagram showing the internal structure of a liquid-filled engine mount applied to a conventional example.

2 is a side view showing a side of a liquid-filled engine mount applied to a conventional example.

3 is a structural diagram schematically showing the internal structure during high frequency vibration of a liquid-filled engine mount applied to the present invention.

Figure 4 is a schematic diagram showing the internal structure during low frequency vibration of the liquid-filled engine mount applied to the present invention.

* Explanation of symbols for main parts of the drawings

10: elastic member 11: center boss

12: upper fastening member 20: diaphragm

30: coupling means 40: liquid chamber

41: main liquid chamber 42: sub liquid chamber

50 plate member 51 upper plate

52: lower plate 53: flow path

54: lower orifice 60: rubber means

61: upper orifice

The present invention relates to a liquid-enclosed engine mount disposed between an engine and a body of an automobile to control the vibration and shock of the engine to block transmission of vibration and shock to the body, and particularly, at low frequency vibration of the engine. And it relates to a liquid-enclosed engine mount that can effectively control the impact to improve the riding comfort while driving.

In general, liquid-filled engine mounts, which are disposed between an engine and a body of a vehicle to control the vibration and shock of the engine to block transmission of vibration and shock to the body, have been variously proposed in various forms.

An example of such a liquid enclosed engine mount is Japanese Utility Model Application Publication No. 4-30336, filed with a utility model filed on July 16, 1990 in Japan, and published on March 11, 1992.

Japanese Utility Model Application Laid-open No. Hei 4-30336, as shown in FIGS. 1 and 2, has a center boss having a connection bolt 4 'made of an elastic material and coupled to the engine 1' ( 3 ') is a fixed elastic member 2', a diaphragm 5 'made of an elastic material and coupled to an end of the elastic member 2' to form a liquid chamber 6 ', orifice and one side A trimming plate 7 'having a valve and disposed between the elastic member 2' and the diaphragm 5 'to divide the liquid chamber 6', and a bottom plate and having the bottom plate and the elastic member 2 '. ) And the trimming plate 7 'and penetrate the base 9' through the case 8 'supported by the base 9' and the connecting bolt 4 'fixed to the center boss 3'. And a stopper 10 'coupled to the cylinder, and a working liquid is filled in the liquid chamber 6'.

Such a conventional liquid-sealed engine mount has the liquid chamber 6 'because the orifice formed in the trimming plate 7' is constantly opened even when low frequency vibration or high frequency vibration occurs in the engine 1 '. The flow of working fluid filled in) was monotonous.

In addition, since the movement of the working fluid filled in the liquid chamber 6 'is monotonous, the impact cannot be more smoothly controlled when low frequency vibration occurs in the engine 1'.

In other words, the conventional liquid-sealed engine mount has a low-frequency vibration, so that when the low-frequency vibration occurs in the engine, the working fluid filled in the liquid chamber flows monotonously. There have been various problems such as lowering the reliability of the car due to the degradation.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and an object of the present invention is to improve riding comfort during driving by easily controlling low frequency vibrations by increasing the frictional force due to the flow of the working fluid when low frequency vibrations are generated in the engine. To provide a liquid-filled engine mount that can further improve the reliability of the vehicle.

In order to achieve the above object, the liquid-encapsulated engine mount according to the present invention is a liquid-encapsulated type consisting of an elastic member to which an upper fastening member is fixed, and a diaphragm which is combined with the elastic member to form a liquid chamber filled with a working liquid. An engine mount, comprising: a plate member in which the liquid chamber is divided into a main liquid chamber and a sub-liquid chamber and a flow path is formed so that the working liquid flows; It is characterized in that it consists of a rubber means fixed to the plate member to be reduced.

In the liquid encapsulated engine mount according to the present invention, when the low frequency vibration occurs in the engine, the volume of the flow path is reduced, so that the damping value is increased due to an increase in the frictional force of the working fluid flowing from the pouring chamber to the auxiliary liquid chamber. It will be easy to control.

Hereinafter, an embodiment of a liquid encapsulated engine mount according to the present invention will be described in detail with reference to the accompanying drawings.

3 is a structural diagram schematically showing the internal structure during the high frequency vibration of the liquid-filled engine mount applied to the present invention, Figure 4 is a schematic diagram showing the internal structure during the low frequency vibration of the liquid-filled engine mount applied to the present invention It is a schematic diagram.

In FIG. 3 and FIG. 4, reference numeral 40 denotes a liquid chamber filled with a working fluid that flows to control vibration and shock when vibrations and shocks occur in an engine, and an elastic member 10 made of an elastic material such as rubber. And a diaphragm 20 that flows to absorb vibrations and shocks when vibrations and shocks are generated in the engine.

In addition, the upper fastening member 12 coupled to the engine is integrally fixed to the elastic member 10 by the center boss 11.

In addition, the liquid chamber 40 formed by the elastic member 10 and the diaphragm 20 is the injection chamber 41 by the plate member 50 is formed with a flow path 53 through which a working fluid flows. It is partitioned into the liquid chamber 42.

In addition, at least one lower orifice 54 is formed in the diaphragm member 50 so that the working fluid of the liquid injection chamber 41 flows into the liquid injection chamber 42.

In addition, the diaphragm member 50 that divides the injection chamber 41 and the sub-liquid chamber 42 includes an upper plate 51 continuously penetrated in an arc shape so that the flow path 53 is formed, and The lower plate 52 formed with one or more lower orifices 54 is integrally coupled so that the working fluid of the pouring chamber 41 flows into the sub-liquid chamber 42.

In addition, in the diaphragm 50, the volume of the flow path 53 is reduced during low frequency vibration so that the attenuation value is increased by increasing the frictional force of the working fluid, and at the same time, the flow path 53 and the injection chamber The rubber means 60 which consists of an elastic material which partitions 41 is stuck.

In addition, the rubber means 60 fixed to the diaphragm member 50 includes one or more upper orifices 61 through which a working fluid passes so that the working fluid of the pouring chamber 41 flows into the flow path 53. ) Is perforated.

On the other hand, in Figure 30, the elastic member 10 and the coupling means for coupling the elastic member 10 and the diaphragm 20 so that the liquid chamber 40 is formed by the diaphragm 20. As a result, the lower fastening member 31 is fixed to the center of the vehicle so as to be fastened.

In addition, an air chamber 23 is formed between the coupling means 30 and the diaphragm 20 so that the diaphragm 20 flows flexibly.

Next, the effect of the liquid-sealed engine mount according to the present invention configured as described above will be described.

First, when the high frequency vibration is generated in the engine, the pressure applied to the injection chamber 41 is lowered, so that the rubber means 60 which partitions the injection chamber 41 and the flow path 53 is formed by an elastic force. As shown in FIG. 3, the plane remains substantially flat.

That is, the volume of the flow path 53 is not changed so that the working fluid of the injection chamber 41 is smoothly flowed into the sub-liquid chamber 42 through the flow path 53.

In addition, since the working fluid flowing through the flow path 53 flows smoothly, it is possible to smoothly control vibration during high frequency vibration.

On the other hand, when low frequency vibration is generated in the engine, the pressure applied to the injection chamber 41 is increased, so that the rubber means 60 is bent downward by the pressure as shown in FIG.

In addition, when the rubber means 60 is bent downward, the volume of the flow passage 53 partitioned by the rubber means 60 is reduced, thereby passing through the flow passage 53 from the pouring chamber 41. The frictional force of the working fluid flowing into the sub liquid chamber 42 is increased.

In addition, since the frictional force of the working fluid flowing from the pouring chamber 41 through the flow passage 53 to the sub-liquid chamber 42 is increased, the damping value and spring constant of the engine mount are increased, thereby more smoothly impacting. You can control it.

That is, during low frequency vibration, the frictional force of the working fluid flowing in the liquid chamber 40 is increased by decreasing the volume of the flow path 53, and the damping value and the spring constant are increased by increasing the frictional force of the working fluid. By effectively controlling the impact of the vibration it is possible to further improve the ride comfort of the car.

As described above, according to the liquid-filled engine mount according to the present invention, when the low frequency vibration occurs in the engine, the attenuation value and the spring constant are increased by increasing the frictional force of the working fluid flowing in the liquid chamber by reducing the volume of the flow path. The impact of low frequency vibration can be more easily controlled, and thus the reliability of the vehicle can be further improved.

Claims (5)

A liquid-sealed engine mount comprising an elastic member having an upper fastening member secured thereto and a diaphragm coupled to the elastic member to form a liquid chamber filled with a working liquid, wherein the working chamber is partitioned into a main liquid chamber and a sub-liquid chamber. And a rubber member fixed to the diaphragm member so as to reduce the volume of the fluid passage at low frequency vibration while dividing the diaphragm and the injection chamber formed in the diaphragm to flow the gas. Liquid-filled engine mount. The lower plate of claim 1, wherein the diaphragm member has an upper plate which is continuously penetrated in a generally circular arc shape to form the flow liquid, and a lower plate having one or more lower orifices so that the working fluid of the liquid injection chamber flows into the liquid storage chamber. Liquid-mounted engine mount, characterized in that the integrally coupled. The liquid-filled engine mount of claim 1, wherein at least one upper orifice is formed in the rubber means for passing the working fluid so that the working fluid of the pouring chamber flows into the flow path. The liquid-filled engine mount according to claim 1, wherein the flow path is configured to reduce the volume at low frequency vibration to increase frictional force in the working fluid to increase the spring constant and the damping value. The liquid-filled engine mount according to claim 1, wherein the flow path is configured to increase in volume during high frequency vibration, thereby lowering frictional force in the working fluid, thereby lowering spring constant and attenuation value.