JPH01145226A - Power plant supporting device for automobile - Google Patents

Abstract

PURPOSE:To surely prevent the transmission of vibration and noise from a power plant in simple manners by arranging the center of gravity of the power plant in the vicinity of a plane including three mounts and allowing the line connecting the mounts to coincide with the rotary shaft of the power plant. CONSTITUTION:The first and second mounts 14 and 15 are installed on the right and left side members 12 and 13 in pairs which are arranged in an engine room 11. The third mount 15 is installed onto the reinforcing member 16 of a dashboard at the rear edge of the engine room 11. In this case, the first and second mounts 14 and 15 are arranged in the upper and lower parts in front of the center of gravity G of a power plant 18, and the third plant 17 is arranged at the equal height to the center of gravity G behind the power plant 18. The center of gravity G of the power plant 18 is arranged in the vicinity of the plane P including the mounts 14, 15, and 17. Then, the line connecting the mounts 14, 15, and 17 is allowed to coincide with the rotary shaft T of the power plant 18.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a support device for supporting a horizontally mounted power plant in an automobile in an engine room.

(Prior art) Generally, for example, front engine/front drive (
FF) type vehicles are equipped with a horizontally mounted power plant. This horizontal power plant is composed of an engine, a transmission, a differential gear, etc., and the engine shaft is oriented in a direction perpendicular to the direction of travel.

Therefore, compared to a vertically installed power plant, longitudinal vibrations are more likely to occur due to torque fluctuations, drive reaction force, road reaction force, etc. In order to prevent the generated vibrations and noise from being transmitted to the passenger compartment and deteriorating the riding comfort, a support device that effectively prevents the transmission of rotational vibrations is required.

Conventionally, many supporting devices for preventing the transmission of rotational vibrations of horizontal power plants have used torque lofts, such as one shown in FIG. 4, for example.

This consists of a sub-member 2 that extends in the longitudinal direction at the center of the lower side of the engine room 1, a front mount 4 that is attached to the sub-member 2 and supports the front side of the power plant 3, and a rear side of the engine room 1. a rear mount 6 that supports the rear side of the power plant 3; a sight mount 7 that supports the power plant 3 from one side; A transmission mount 8 supporting the transmission part of the power plant 3, and a torque rod 9 connected to the sub member 2 and the front or rear of the power plant 3, respectively. It consists of IO. Note that this is the F direction or the front in the figure.

(Problems to be Solved by the Invention) However, in the conventional support device, four types of mounts 4, 6, 7.8 and two types of torque rods 9. Since IO is used, there are problems in that the number of parts is large, assembly is difficult, and costs are high.

Furthermore, a sub member 2 is placed in the center of the lower part of the engine room l.
had to be specially arranged, resulting in problems such as an increase in vehicle weight and a complicated vehicle body structure.

The present invention has been made in view of the above problems, and its purpose is to provide a support device that has a simple structure and that reliably prevents the transmission of vibrations Σ and noise from a power plant. It is in.

(Means for solving the problems) Means for solving the above problems will be specifically explained based on FIGS. 1 to 3.

Left and right side members 12, 1 in the engine room 11
A first mount 14 and a second mount 15 are provided on each of the mounts 14 and 15, and a third mount 17 is provided on the dash panel reinforcement 16 at the rear of the engine compartment 11. The center of gravity G of the power plant 18 is located in the vicinity of a plane P including each of the mounts 14, 15.
, 15.17 so that the line connecting them coincides with the rotational axis T of the rotational vibration of the power plant 18.
Is, 17 is arranged.

(Function) In this way, there are three mounts 1 in the engine room 11.
When the power plant 18 is supported by arranging the mounts 14, 15, 17, each mount 14, 15, 17 always receives rotational vibration generated in the power plant 18 from the same direction, making it possible to efficiently suppress rotational vibration. can.

(Example) Next, an example of the present invention will be described based on FIGS. 1 to 3.

In the engine room 11 there are side members 12 and l on the left and right.
:l is provided, and a first mount 14 is attached to the right side member 12. Further, a second mount 15 is attached to the left side member 13. Furthermore, a third mount 17 is attached to a reinforcing member 16 that reinforces the dash board at the rear end of the engine room 11.

Then, to explain the arrangement positions of each mount 14, 15, 17, first, the first mount 14 is located on the power plant 1.
The second mount 15 is located in front of and above the center of gravity G of the power plant 18 (F direction is the front), the second mount 15 is located in front of and below the center of gravity G of the power plant 18, and the third mount 17 is located above the center of gravity G of the power plant 18. behind the 18 and the power plant 18
It is located at almost the same height as the center of gravity G.

Furthermore, the center of gravity G of the power plant 18 is located near the plane P including each mount 14, 15, 17, and each mount 14, 15, 17 in front view (FIG. 3).
17 and the rotational axis T of the rotational vibration of the power plant 18.
Place.

And each mount arranged in this way 14.15.1
When the power plant 18 is supported by the mounts 1 and 7, longitudinal vibrations generated in the power plant 18 due to torque fluctuations, drive fluctuations, or road reaction forces are absorbed by each mount 1.
4, 15, and 17 are always received from the same direction, and rotational vibration can be efficiently suppressed.

Therefore, transmission of vibrations and noise into the vehicle interior is effectively prevented.

(Effects of the Invention) As explained above in detail, the present invention uses three mounts, the center of gravity of the power plant is located near the plane containing each mount, and the straight line connecting each mount when viewed from the front is the power plant. By positioning each mount to match the rotational axis of the plant's rotational vibration, torque fluctuations,
It is possible to efficiently prevent rotational vibration in the longitudinal direction that occurs in the power plant due to drive fluctuations or road reaction forces.

Compared to conventional models, the number of parts can be significantly reduced, and since no special parts are required, the weight of the vehicle can be reduced, and one assembly process is easier, improving productivity. Also, there are effects such as reduction in manufacturing costs.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the inside of the engine room showing a power plant support device according to an embodiment of the present invention, FIG. 2 is a side view of the inside of the engine room shown in FIG. 1, and FIG. FIG. 4 is a side view of the inside of the engine room showing an example of a conventional power plant support device. 11...Engine room 12.13...Side member 14...First mount 15...Second mount 17...Third mount 18...Power plant

Claims (1)

[Claims] (1) A first mount and a second mount are provided on each of the left and right side members in the engine room, and a third mount is provided on the dash panel reinforcement at the rear of the engine room, and the power plant is mounted using each mount. The supporting device is such that the center of gravity of the power plant is located near a plane containing each of the mounts, and a straight line connecting each mount in front view coincides with a rotation axis of rotational vibration of the power plant, An automobile power plant support device characterized by having various mounts arranged.