KR0145677B1 - A structure of engine mounting for a vehicle - Google Patents

Abstract

To actively absorb vibrations of the engine according to the magnitude of the vibration frequency to improve ride comfort;

In mounting an engine of a vehicle to a vehicle body using a mount bush formed of a rubber member which is an elastic body, the rubber member of the mount bush is formed to have different spring characteristics according to the direction input from the outer circumference, and according to the vibration frequency of the engine. In order to absorb the vibration of the engine at the most ideal spring constant, it provides a mount structure of the automobile engine that can be rotated by the forward and reverse motors controlled by the ECU.

Description

Mount structure of the car engine

1 is an exploded perspective view of a mount bush to be applied to the present invention.

2 is an assembled cross-sectional view of the present invention.

3 is a cross-sectional view of a conventional bush.

* Explanation of symbols for main parts of the drawings

1: Mount Bush 2, 3: Inner, outer tube

4: Rubber member 5: Thick thickness part

6, 8: elastic groove 7: thin thickness

10, 15: Bracket 1 2

13: Pinion 14: Forward, reverse motor

[Industrial use]

The present invention relates to a mount structure of an automobile engine, and more particularly, to a mount structure of an automobile engine capable of actively absorbing vibration of an engine to improve ride comfort.

[Prior art]

In general, the engine, which is the power source of a car, periodically changes its center gear by vertical movement of the piston and connecting rod, and generates inertial force of the reciprocating part that occurs in the cylinder axial direction. Therefore, the vibration causes of these vibrations overlap the left and right and up and down direction is generated.

In addition, the vibration of the engine as described above is generated larger than the engine with a small number of cylinders and the engine with a large number of cylinders, it is generated larger than at a high speed at low speed, such vibration of the engine is transmitted to the vehicle body to feel the ride of the car To make it worse, the rubber mount exerting elastic force is applied to the engine mount portion to prevent the engine vibration from being transmitted to the vehicle body.

As described above, the conventional mount bush that attenuates transmission of the engine's own vibration to the vehicle body is simply formed by interposing an elastic rubber member 50 between the inner and outer pipes 51 and 52 as shown in FIG. In addition, the elastic grooves 53 are formed at both sides at predetermined positions of the rubber member 50.

The elastic groove 53 is a spring constant of the portion orthogonal to the spring constant of the portion where the elastic groove 53 is formed.

[Problem to solve]

However, as described above, the mount bush having a constant spring constant passively absorbs a vibration frequency that varies according to the engine operating conditions under the same conditions, so that effective vibration absorption is not achieved. The problem is that it doesn't help much.

Therefore, the present invention was created to solve the above problems, and an object of the present invention is to provide a mount structure of an automobile engine to actively absorb the vibration of the engine according to the magnitude of the vibration frequency to improve the riding comfort. will be.

[Means to solve the problem]

In order to realize this, in the present invention, when mounting an engine of an automobile to a vehicle body using a mount bush formed of a rubber member that is an elastic body, the rubber member of the mount bush is formed to have different spring characteristics according to a direction input from an outer periphery. In order to absorb the vibration of the engine at the most ideal spring constant according to the vibration frequency of the engine, the mount structure of the automobile engine is provided so that the mount bush can be rotated by the forward and reverse rotation motors controlled by the ECU.

The mount bush is interposed between the inner and outer tubes, the rubber member is an elastic body, the inner tube is disposed eccentrically from the center to one side of the rubber member, the thickness of the rubber member is different in size radially based on the inner tube The present invention provides a mount structure of an automobile engine in which a plurality of elastic grooves are formed and other elastic grooves are formed in a thin thickness portion.

The elastic groove in the above provides a mount structure of an automobile engine formed of three in the thick thickness, one in the thin thickness.

The mount bush is integrally formed with an uneven portion having a predetermined length in the circumferential direction of the outer circumferential surface of the outer tube, and the uneven portion thereof is exposed to the outside through a long hole formed in a cylindrical portion of the bracket connected to the engine and controlled by the ECU. It provides a mount structure for an automobile engine that is adapted to engage with the pinion of a rotating motor.

[Action]

When the engine is started by the above configuration, the ECU transmits a signal suitable for the forward and reverse motors in consideration of the vibration engine speed of the engine.

Then, the forward and reverse motors rotate the pinion while driving the forward and reverse directions according to the signal of the ECU, thereby driving the uneven parts engaged with the engine mounts so as to rotate the whole.

In this way, when the mount bush is rotated by the forward and reverse rotation motors, the spring constant of the mount bush is changed by the same direction as the weight of the engine, but the vibration of the engine is absorbed by the changed spring constant.

That is, by adjusting the spring constant of the mount bush to most effectively absorb the vibration according to the number of revolutions of the engine, the most effective dust is achieved is transmitted to the vehicle body with the engine vibration minimized to improve the ride comfort .

[Example]

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention that can specifically realize the above object will be described in detail.

1 and 2 are exploded perspective views and assembly cross-sectional views of a mount bush to be applied to the present invention, with reference numeral 1 providing a mount bush.

The mount bush 1 is interposed between the inner and outer tubes (2) and (3), the rubber member 4 is an elastic body, the inner tube (2) is disposed eccentrically to the rubber member (4) to one side.

In the thick portion 5 of the rubber member 4, a plurality of elastic grooves 6 having different sizes are formed radially with respect to the inner tube 2, and the elastic groove 8 is formed in the thin thickness portion 7. Formed.

In forming the above-mentioned elastic grooves 6 and 8, in the present invention, it is illustrated that three are formed in the thick thickness portion 5 and one in the thin thickness portion 7, but the present invention is not limited thereto. No, his number increases or decreases according to the design conditions.

In this way, the inner tube (2) is eccentric and formed the elastic groove (6) (8) in a number of places, based on the position of the elastic groove (6) (8), the reference line (a) (b) ( The spring constant of the rubber member 4 with respect to the direction of c) is different, and in addition, it is different depending on the direction input from the outside.

In addition, an uneven part 9 having a predetermined length in the circumferential direction is integrally formed on a part of the outer circumferential surface of the outer tube 3 formed outside the rubber member 4, which is mounted by a driving bush 1 by a driving means described later. ) To rotate.

The mount bush 1 as described above is inserted into the cylindrical portion 11 of the bracket 10 connected to the engine not shown, the cylindrical portion 11 is fixed to the mounting bush (1) is inserted and fixed to rotate freely In this case, the long hole 12 is formed at a position corresponding to the uneven portion 9 so that the uneven portion 9 is exposed to the outside through the long hole 12 when the mount bush 1 is coupled. .

The length of the long hole 12 may be determined in consideration of the maximum rotation angle of the mount bush 1.

In addition, a forward and a reverse rotation motor 14 having a pinion 13 engaged with the uneven portion 9 on the shaft is disposed outside the long hole 12, and the forward and reverse rotation motor 12 is an engine. It is connected to the ECU which is an electronic control device for controlling the forward and reverse rotation motor 12 according to the number of revolutions of.

In the above, the ECU rotates the mount bush 1 according to a pre-input signal in consideration of the vibration generated in accordance with the rotational speed of the engine.

In addition, the inner tube (2) of the mount bush (1) is fastened and fixed as a fixing bolt (16) to the bracket (15) formed in the vehicle body.

In this way, when the engine of the vehicle is fixed to the vehicle body, it is mounted in the state shown in FIG. 2, and when the engine is started in this state, the ECU detects the vibration of the engine in relation to the engine speed, and accordingly, the engine speed is known accordingly. The correct signal is sent to the forward and reverse motor 14.

Then, the forward and reverse rotation motor 14 rotates the pinion 13 while driving forward and reverse in response to the signal of the ECU, thereby driving the uneven portion 9 engaged with the engine mount 1 to rotate as a whole.

When the mount bush 1 is rotated by the forward and reverse motors 14 as described above, the spring constant of the mount bush 1 is changed while the direction applied by the weight of the engine is the same. Is absorbed by.

As described above, by adjusting the spring constant of the mount bush 1 to most effectively absorb its vibration, according to the number of revolutions of the engine, the most effective dust is achieved and transmitted to the vehicle body in a state where the vibration of the engine is minimized, resulting in a ride comfort. This is to be improved.

[effect]

As described above, according to the present invention, the spring constant of the engine mount bush has different characteristics for each input direction, and by rotating the mount bush to absorb the most ideal spring constant according to the rotational speed of the engine, It is an invention that can actively absorb vibration according to the magnitude of the vibration frequency to improve the riding comfort.

Claims (4)

In mounting an engine of a vehicle to a vehicle body using a mount bush formed of a rubber member which is an elastic body, the rubber member of the mount bush is formed to have different spring characteristics according to the direction input from the outer circumference, and according to the vibration frequency of the engine. A mount structure of an automobile engine that allows the mount bush to be rotated by a forward and reverse motor controlled by an ECU so as to absorb engine vibration at an ideal spring constant. The method of claim 1, wherein the mount bush is interposed between the inner and outer tubes, the rubber member is an elastic body, the inner tube is disposed eccentrically from the center to one side of the rubber member, the thicker portion of the rubber member relative to the inner tube A mount structure of an automobile engine in which a plurality of elastic grooves of different sizes are formed radially and different elastic grooves are formed in a thin thickness portion. 3. The mount structure of an automobile engine according to claim 2, wherein three elastic grooves are formed in the thick thickness portion and one in the thin thickness portion. According to claim 1, Mounting bush is integrally formed with a concave-convex portion having a predetermined length in the circumferential direction of the outer circumferential surface of the outer tube, the concave-convex portion of the mount bush is exposed to the outside through the long hole formed in the cylindrical portion of the bracket connecting the engine Mounting structure of the car engine, which is engaged with the pinion of the controlled forward and reverse motors.