KR100489106B1 - active type mount for a vehicle - Google Patents

Abstract

The present invention enables the damping force characteristic of the mount to be actively changed according to the behavior of the vehicle, thereby providing a suitable mounting characteristic corresponding to the movement characteristic of the vehicle to ensure a quieter and more stable ride.

Description

Active type mount for a vehicle

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mount for fixing a heavy object such as an engine or a transmission of a vehicle to a vehicle body, and more particularly, to a technique for actively changing its mounting characteristics according to the behavior of a vehicle.

The engine or transmission mount used in the related art is made of a simple rubber material, and there is a fluid-filled engine mount in which a liquid or gas is sealed inside the rubber material.

The fluid-enclosed engine mount is designed to change its damping force as the fluid inside moves according to the vibration characteristics of the vehicle, and thus has a wider operating range than a simple rubber material. In many cases, it is insufficient to provide an optimal damping force for the changing motor characteristics.

The present invention is to provide an active mount of the vehicle to ensure a quieter and more stable ride with an appropriate mounting function corresponding to the movement characteristics of the vehicle by allowing the mount's damping force characteristics to be actively changed according to the vehicle's behavior. Its purpose is.

An active mount of a vehicle of the present invention for achieving the above object includes an insulator having a space therein;

A high pressure gas container;

A supply pipe and a recovery pipe path communicating the internal space of the insulator from the high pressure gas container;

A check valve installed in the recovery line to block the flow of the high pressure gas from the high pressure gas container toward the insulator;

It is characterized in that it comprises a switching valve means for selectively switching the communication state between the supply line and the recovery line is operated by the negative pressure of the engine intake machine.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 shows the configuration of an active mount according to the present invention, and the mount function for mounting the engine or the transmission is in charge of an insulator 1 having a space therein, and an internal space of the insulator 1. It is provided with a high-pressure gas container (3) for providing a high-pressure gas, the supply line 5 and the recovery line (7) for communicating the internal space of the insulator (1) from the high-pressure gas container (3), respectively It is.

The recovery line 7 is further provided with a check valve 9 for blocking the flow of the high pressure gas from the high pressure gas container 3 toward the insulator 1, the supply line 5 and the recovery line ( 7 is provided with a switching valve means which is operated by the negative pressure of the engine intake machine and selectively switches the communication state between the supply line 5 and the recovery line 7.

In the present embodiment, the switching valve means is a diaphragm 11 which operates according to the magnitude of the negative pressure provided from the intake machine (surge tank, etc.) of the engine, and an internal valve spool according to the linear movement of the diaphragm 11. (13) was moved to include a spool valve (15) for switching the communication between the supply line (5) and the recovery line (7).

Looking at the operation of the present invention configured as described above are as follows.

In a state in which a negative pressure is relatively applied to the intake system of the engine, such as when the vehicle is driving at low speed, the driver does not step on the accelerator pedal much, or there is no sudden operation of the accelerator pedal, the state becomes as shown in FIG. 1.

That is, when the negative pressure provided from the engine intake machine (surge tank, etc.) is smaller than the elastic force by the spring 17 in the diaphragm 11, the spool valve 15 has a state as shown in FIG. In the supply line 5 is blocked and the recovery line 7 is a state in which gas can flow only in the direction from the insulator 1 toward the high-pressure gas container 3.

In such a state, the internal pressure of the insulator 1 has a relatively low state, thereby providing a relatively softer mounting characteristic to actively cope with low frequency vibration, and the pressure applied to the insulator 1. By the change, the high pressure gas inside the insulator 1 passes through the check valve 9 and is recovered to the high pressure gas container 3. If this condition persists, the high pressure gas container 3 is The pressure is higher than the internal pressure of the insulator (1), which means that the high pressure gas inside the insulator (1), which is strongly compressed by the behavior of the vehicle body, moves to the high pressure gas container (3) through the check valve (9). The pressure of the high-pressure gas container 3 is in the insulator 1 based on a state in which the insulator 1 is subjected to a general pressure, because it cannot move backwards. Than the pressure will be a major state.

When the driver suddenly presses the accelerator pedal in the above state or the vehicle is traveling at high speed, the negative pressure of the engine intake system increases, thereby overcoming the force of the spring 17 of the diaphragm 11 and of the spool valve 15. The valve spool 13 is pulled to the left in the drawing.

Therefore, the supply line 5 is opened and the recovery line 7 is blocked. In this case, the high pressure gas of the high pressure gas container 3 is supplied to the internal space of the insulator 1 so that the supply line 5 is opened. By allowing the insulator 1 to exert a stronger damping force, it provides a mounting characteristic that actively copes with high frequency vibrations.

As described above, according to the present invention, the damping force characteristic of the mount can be actively changed according to the behavior of the vehicle, thereby providing an appropriate mounting characteristic corresponding to the movement characteristic of the vehicle to ensure a quieter and more stable ride. .

1 is a view showing the configuration of an active mount according to the present invention, a view showing an operating state at a low speed or stable state of the vehicle,

FIG. 2 is a diagram illustrating an operating state of the active mount of FIG. 1 during high-speed driving or rapid acceleration of a vehicle.

<Brief description of symbols for the main parts of the drawings>

One; Insulator 3; High Pressure Gas Container

5; Supply line 7; Recovery pipeline

9; Check valve 11; Diaphragm

13; Valve spool 15; Spool Valve

Claims (2)

An insulator having a space therein; A high pressure gas container; A supply pipe and a recovery pipe path communicating the internal space of the insulator from the high pressure gas container; A check valve installed in the recovery line to block the flow of the high pressure gas from the high pressure gas container toward the insulator; Switching valve means which is operated by a negative pressure of an engine intake machine to selectively switch the communication state between the supply line and the return line; Active mount of a vehicle, characterized in that configured to include. According to claim 1, wherein the switching valve means A diaphragm operated according to the magnitude of the negative pressure provided from the intake system of the engine; A spool valve which moves an internal valve spool according to a linear movement of the diaphragm to switch a communication state between the supply line and the return line; Active mount of a vehicle, characterized in that comprises a.