JPH0726194Y2 - Anti-vibration support structure for vehicle engine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is designed to suspend and support an engine horizontally placed along the vehicle width direction from a vehicle body portion located above the center of gravity thereof. The present invention relates to an anti-vibration support structure for a vehicle engine.

(Prior Art) In general, an internal combustion engine has a center of gravity a as shown in FIG.
It is supported from a vehicle body frame c and the like by a plurality of anti-vibration rubbers b arranged below (Japanese Patent Publication No. 61-27615 and the like). Particularly, in consideration of the torsional rotational vibration of the engine d, the anti-vibration rubber b is obliquely arranged between the engine side bracket f and the frame side bracket g having the inclined mounting surface e along the rotational direction thereof, and the torsional rotation is performed. The vibration is configured to act in the shear direction. With this configuration, the engine d
It is possible to effectively damp the vibration associated with the torsional rotation of the.

(Problems to be solved by the invention) By the way, in a vehicle in which the engine d is laterally placed along the vehicle width direction such as a front-wheel drive vehicle, vibration and noise are generated in a low rotation range such as idling. There was a problem of fierceness. This is because at low engine speed, the engine d produces torsional rotational vibration around its center of gravity a, and the low frequency torsional rotational vibration that passes through the anti-vibration rubber b that removes vibration components of relatively high frequency. The component is through the frame side bracket g having the inclined mounting surface e, and the X direction and Z shown in the drawing.
This is because it is transmitted in the direction. In particular, when the vibration component in the Z direction is transmitted to the vehicle body frame c side, the vehicle body frame c
That is, the bending vibration of the vehicle body h is excited to worsen the vibration and noise in the low rotation speed range such as during idling.

(Means for Solving the Problem) The present invention provides a vibration isolating support structure for an engine of a vehicle in which the engine is laid laterally in the vehicle width direction, and has a buffer member at an intermediate portion and pivot pins at both ends. And a plurality of link members having an axis connecting the both pivot pins and set so as to pass through the center of gravity of the engine in the side section of the vehicle, the engine is positioned above the center of gravity of the engine. It is characterized by being suspended and supported on the body part.

(Operation) Next, the operation of the present invention will be described.

As shown in FIG. 1, by relatively supporting the engine 1 with respect to the vehicle body part 2 by the link member 3 provided with the buffer member 6, a relatively high vibration frequency component of the torsional rotational vibration of the engine 1 Can be reduced based on the damping action of the cushioning member 6 itself.

Then, the low-frequency vibration component (vibration component in both X and Z directions) passing through the buffer member 6 can be absorbed based on the rotation action of the link member 3 by the pin support, and both pivot pins 5, 5 of the link member 3 can be absorbed. Since the axis L connecting the two is set so as to pass through the center of gravity G of the engine 1 in the side cross section of the vehicle, the acting direction of the torsional rotational vibration is always perpendicular to the axis L. Does not generate a tensile force or a compressive force as the acting component force in the direction of the axis L, the drive transmission to the vehicle body part 2 due to the tensile force or the compressive force can be reduced, and the engine 1 in the low rotation range can be reduced. Vibration and noise can be suppressed.

Further, when the engine 1 is pivotally supported, the engine 1 is supported by being suspended from the body part 2 located above the center of gravity position G through the link member 3, so that the engine 1 is supported from below the center of gravity position G. Compared to, it is possible to easily and stably support.

(Embodiment) Next, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

First, the basic configuration of the present invention will be described with reference to FIG. As shown in the figure, reference numeral 1 denotes a horizontal type internal combustion engine arranged along the vehicle width direction.
Is suspended and supported via a link member 3 at a vehicle body part 2 located above the center of gravity G thereof. Both ends of the link member 3 in the axial direction are pivotally supported by brackets 4 fixed to the vehicle body part 2 and the engine 1 via pivot pins 5, respectively, and are rotatable relative to the vehicle body part 2 and the engine 1. Be connected. Especially, the pivot pins 5, 5 at both ends of the link member 3
Is the engine 1 in the side cross section of the vehicle with the axis L connecting them.
Is set so as to pass through the center of gravity G of the engine 1, and rotation of the engine 1 in the torsional rotation direction around the center of gravity G is allowed for the vehicle body part 2. Further, in particular, a plurality of link members 3 are arranged on the upper part of the engine 1 at intervals along the torsional rotation direction thereof, and the engine 1 is connected to the vehicle body part 2 by the link members 3.
Hangs on.

In this way, the buffer member 6 for damping the vibration is provided in the intermediate portion 7 of the link member 3 that connects the engine 1 and the vehicle body part 2 and hangs the engine 1 so as to pivotally support the engine body part 2. To be The main axis of the buffer member 6 is attached so as to coincide with the above-mentioned axis L, and the torsional rotational vibration of the engine 1 is configured to act in the shearing direction.

Further, the engine 1 is provided with a torque rod 9 so as to extend between the engine 1 and a fixed system 8 such as an adjacent vehicle body side wall. In particular, the torque rod 9 is paired above and below the center of gravity G of the engine 1. A pin body 11 is rotatably attached to a bracket 10 that is provided and horizontally extends between the vehicle body portion 2 and the engine 1 and the vehicle body portion 2.

By pivotally supporting the engine 1 with respect to the vehicle body part 2 by the link member 3 provided with the buffer member 6, a relatively high vibration frequency component of the torsional rotational vibration of the engine 1 is detected by the buffer member 6 itself. It can be reduced due to the damping action that it has.

Then, the low-frequency vibration component (vibration component in both X and Z directions) passing through the buffer member 6 can be absorbed based on the rotation action of the link member 3 by the pin support, and both pivot pins 5, 5 of the link member 3 can be absorbed. Since the axis L connecting the two is set so as to pass through the center of gravity G of the engine 1 in the side cross section of the vehicle, the acting direction of the torsional rotational vibration is always perpendicular to the axis L. Does not generate a tensile force or a compressive force as the acting component force in the axis L direction, and the vibration transmission to the vehicle body part 2 due to the tensile force or the compressive force can be reduced, so that the engine 1 in the low rotation range can be reduced. Vibration and noise can be suppressed.

Further, when the engine 1 is pivotally supported, the engine 1 is supported by being suspended from the body part 2 located above the center of gravity position G through the link member 3, so that the engine 1 is supported from below the center of gravity position G. Compared to, it is possible to easily and stably support. Further, the torque rod 9 can support a large torque reaction force at the time of starting the vehicle. In particular, since the torque rod 9 is horizontally stretched between the torque rod 9 and the fixed system 8, the torque rod 9 does not transmit the vibration component in the Z direction, so that the bending vibration of the vehicle body 12 can be suppressed also from this aspect. Has become.

Next, specific examples will be described.

In this embodiment, as shown in FIG. 2 to FIG. 4, a pair of left and right side members 13 of the vehicle body 12 and a dash panel 14 are provided as the vehicle body portion 2 located above the center of gravity G of the engine 1. Has been adopted. And the horizontally placed engine 1
Is suspended while being pivotally supported by a link member 3 having a cushioning member 6 interposed between the side member 13 and the dash panel 14. Especially the dash panel 14
The link member 3 that connects the engine 1 to the engine 1 has a center of gravity G of the engine 1.
It is arranged in the vicinity along the vehicle length direction. Other specific configurations are the same as those in FIG.

A pair of upper and lower torque rods 9 are provided between the internal combustion engine 1 and the brackets 4 and 10 attached to the dash panel 14 and the center member 15. Other configurations are the same as those in the above embodiment.

Incidentally, 16 is the transaxle, and C is the center of the crankshaft.

Of course, even in such an embodiment, the same effect as that of FIG. 1 can be obtained.

(Effect of the Invention) As described above, the anti-vibration support structure of the vehicle engine of the present invention is
In an anti-vibration support structure for a vehicle engine in which the engine is laid horizontally along the vehicle width direction, a cushioning member is provided in the middle portion,
A plurality of link members having pivot pins at both ends, and an axis connecting the both pivot pins passing through the position of the center of gravity of the engine in the side cross section of the vehicle Since it is characterized in that it is suspended and supported on the vehicle body portion located above, the following effects can be obtained.

First, low-frequency torsional rotational vibration of the engine can be effectively buffered and absorbed, and vibration and noise to the vehicle body in the low engine speed region can be suppressed.

Further, even if the structure in which the engine is pivotally supported by the link member is adopted by suspending and supporting the engine from the vehicle body part located above the center of gravity position through the link member, the engine is stably supported. Can be supported.

[Brief description of drawings]

FIG. 1 is a side view showing the basic structure of the present invention, FIG. 2 is a perspective view showing a vehicle body as a fixed system, FIG. 3 is a schematic side view showing a supporting state of an engine, and FIG. 4 is a schematic plan view thereof. FIG. 5 is a side view showing a conventional example, and FIG. 6 is a side view showing a bending vibration state of a vehicle body. 1 ... Engine, 2 ... Body part, 3 ... Link member, 6 ...
... Cushioning member, 9 ... Torque rod, G ... Center of gravity of engine.

Claims (1)

[Scope of utility model registration request] 1. A vibration-isolating support structure for an engine of a vehicle in which an engine is placed laterally along a vehicle width direction, a buffer member is provided at an intermediate portion, and pivot pins are provided at both end portions. The engine is suspended and supported by a body part located above the center of gravity of the engine by a plurality of link members that are set so that the axis connecting the support pins passes through the center of gravity of the engine in the side cross section of the vehicle. Anti-vibration support structure of vehicle engine characterized by.