JPH0574488B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an engine mount structure for an automobile that mounts an engine to a vehicle body in such a manner that transmission of vibrations generated during operation of the engine to the vehicle body is alleviated.

(Prior Art) In order to reduce the transmission of vibrations generated during engine operation to the vehicle body, the engine installed in a vehicle is usually mounted on a vehicle body member at multiple locations via a mount member with elastic members attached. can be installed. When installing such an engine to a vehicle body member, it is especially important for vehicles that adopt a front engine/front wheel drive system (FR vehicles).
In addition, in automobiles (RR vehicles) that adopt a rear engine/rear wheel drive system, in order to install the engine while making effective use of the vehicle body space, for example, it is also described in Japanese Utility Model Application Publication No. 54-54026. The so-called horizontal mounting method, in which the engine is mounted horizontally to the vehicle body, is widely adopted, and the engine mounting members used when the engine is mounted horizontally are generally The engine is supported at three points, two on one end of the vehicle body in the direction in which the crankshaft of the engine extends, and one on the other end.

When the engine is supported at three points like this, the connection between the engine and the mounting part provided at one location on one side of both ends of the vehicle body in the direction in which the crankshaft extends is as shown in Figure 3 A, B, and C. It is assumed that various embodiments may be adopted as shown schematically.

Incidentally, while an engine is in operation, it generally generates vibrations that are accompanied by a movement of rotating around an imaginary axis of rotation that passes through it, but when the engine is supported at three points, for example, vibrations occur from above the engine. As you can see, two support positions at one end in the direction in which the engine crankshaft extends are said to sandwich the rotational axis, and one support position at the other end opposite these two positions is on the rotational axis. It is desired that the engine be placed in the vehicle body from the viewpoint of alleviating the transmission of engine vibrations to the vehicle body.

Considering each of the connection modes shown in FIGS. 3A to 3C in consideration of this point, in the connection mode shown in FIG. 3A, the bracket 54 whose one end is fixed to the cylinder block 52 of the engine 50 is The position supported by the mounting portion 56 extending from the vehicle body is located away from the rotational axis O of the engine 50 shown by the dashed line in FIG.

Further, in the connection mode shown in FIG. 3B, a timing belt cover 58 is provided to cover the timing belt, which is a power transmission means for transmitting the rotation of the crankshaft to the camshaft, in the cylinder block 52 of the engine 50. A bracket 54 extends from the end surface along the rotational axis O of the engine 50, and one end of the bracket 54 is supported on the rotational axis O of the engine 50 by a mounting portion 56 extending from the vehicle body. Since auxiliary equipment such as a water pump is disposed on the end face where the cover 58 is disposed, there is a problem in that it is difficult to fix the bracket 54 to the cylinder block 52.

Therefore, in order to solve the problem in the connection form shown in FIGS. 3A and 3B, the connection form shown in FIG. 3C has been proposed. Both ends of the bracket 60 are attached to a fixed engine side bracket 60, and a connecting mount member 62 that goes around the outer periphery of the timing belt cover 58 is arranged.
A bracket 54 is provided at the upper portion, and one end of the bracket 54 is supported on the rotational axis O of the engine 50 by a mounting portion 56 extending from the vehicle body.

(Problems to be Solved by the Invention) However, when the connection mode as shown in FIG. Since a relatively large-scale connecting mount member 62 extending around the outer periphery of the cover 58 is disposed, the number of parts required to mount the engine on the vehicle body increases and the cost accordingly increases. Furthermore, an undesirable weight increase is involved. Furthermore, since the connecting mount member 62 is disposed around the outside of the timing belt cover 58, it becomes difficult to attach and detach the timing belt cover 58, resulting in a problem that serviceability is impaired.

In view of the above, the present invention provides a power source for transmitting the rotation of the engine crankshaft to the camshaft when the engine is mounted and supported on the body of an automobile with the crankshaft extending along the shaft width direction. The end portion where the transmission means is disposed is connected to the mounting portion provided on the vehicle body via the mount member in such a way as to obtain a sufficient vibration damping effect, and the end portion is disposed between the engine and the mounting portion of the vehicle body. The mounting member that
An object of the present invention is to provide a small-scale automobile engine mount structure that can be easily attached to the end of an engine where various auxiliary equipment is arranged, and that does not impair the serviceability of the engine. .

(Means for Solving the Problems) In order to achieve the above-mentioned object, the engine mount structure for an automobile according to the present invention is designed to mount the engine on the vehicle body with the crankshaft thereof extending along the width direction of the vehicle. , located on the engine's rotation axis or in the vicinity thereof, facing one end surface of the engine where the power transmission means for transmitting the rotation of the engine and the crankshaft to the camshaft is arranged. The provided mounting portion is connected via a mount member, and the mount member, which is to be placed between the engine and the mounting portion of the vehicle body, is attached to each of the side portions that sandwich the rotational axis of the engine. a clamping part each fixed to a portion close to the one end face of the engine; a connecting part disposed between the one end face of the engine and the power transmission means disposed thereto and connecting the clamping parts; and a bracket part that protrudes from the bracket part and is supported by the mounting part provided on the vehicle body.

(Function) As described above, in the automobile engine mount structure according to the present invention, the connecting portion that connects the clamping portions fixed to the engine in both side views sandwiching the axis of rotation of the engine is connected to the end face portion of the engine. The bracket is disposed between the bracket and the power transmission means disposed therein, and one end of the bracket extending from the coupling portion is positioned on the rotational axis of the engine opposite to the end face of the engine on which the power transmission means is disposed. The end of the vehicle body where the power transmission means for transmitting the rotation of the engine crankshaft to the camshaft is located via a mount member that is supported by a mounting portion of the vehicle body provided at or near the mount member. Connects to the mounting part provided on the

Therefore, according to the automobile engine mount structure according to the present invention, the engine can be mounted on the vehicle body using a mount member that is small in size, easy to attach to the engine, and does not impair the serviceability of the engine. This means that the engine can be mounted on the vehicle body with the crankshaft extending along the vehicle width direction.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 and FIG. 2, which is a cross-sectional view taken along the line - in FIG. 1, schematically show an example of an engine mount structure for an automobile according to the present invention, together with a part of an engine connected to the vehicle body thereby.

In FIGS. 1 and 2, the crankshaft built into the cylinder block 10 of the engine 2 is mounted horizontally on the vehicle body with the crankshaft extending along the width direction of the vehicle. A camshaft pulley 4 is disposed on one end surface of the cylinder head 12 and cylinder head cover 14 in the extending direction, and the camshaft pulley 4 is equipped with a timing belt forming a power transmission means for transmitting the rotation of the crankshaft to the camshaft pulley 4. 6 is installed.
A water pump 8 and the like to which rotation of the crankshaft is transmitted via the belt 7 is disposed on the end face of the cylinder block 10 on the side where the timing belt 6 is disposed. Furthermore, the camshaft pulley 4
and a cylinder block 10, a cylinder head 12, and a cylinder head cover 14 mounted thereon.
A timing belt cover 9 is provided to cover the timing belt 6 disposed on one end side. A predetermined gap indicated by S in FIG.

An engine mount member 16 is attached to the upper end of the cylinder block 10 by bolts 18a and 18b. The engine mount members 16 are located on both side surfaces of the cylinder block 10 sandwiching the rotational axis O of the engine 2 (indicated by a dashed line in FIG. 2) near the end surface on the side where the timing belt 6 is disposed. bolt 18
It is arranged through the gap S formed between the clamping parts 19a and 19b fixed by the cylinder heads 19a and 18b, the end surface of the cylinder head 12 on the side where the timing belt 6 is arranged, and the back surface of the timing belt cover 9. It is formed by a connecting part 20 that connects the clamping parts 19a and 19b fixed to both side surfaces of the cylinder block 10, and a bracket part 22 extending from the center of the connecting part 20 along the rotational axis O of the engine 2. ing. In this example, the clamping part 1
The clamping part 19b of 9a and 19b is the connecting part 20
A connecting portion 20 with such a clamping portion 19b is fixed to the clamping portion 19a with a bolt 24. Further, the bracket portion 22 is also formed integrally with the connecting portion 20, and the end portion of the bracket portion 22 projects outward from the engine 2 through an opening 9a formed in the timing belt cover 9. This bracket 2
A bolt 32 is attached to the other end of the support plate member 28a coupled to the outer circumferential portion of the elastic mount member 28 of the mounting portion 30, which is configured with a cylindrical elastic mount member 28 at a position on the rotation axis O of 2. It can be attached by twisting it.

In this way, the engine 2 is supported at three locations: one at two locations on the vehicle body at one end in the direction in which the crankshaft extends, and one at one location on the vehicle body at the other end. In order to ensure that the engine 2 is mounted with three-point support, the engine 2 is supported at two locations sandwiching the rotational axis O of the engine 2 on one end side of the engine 2. 30, the engine mount member 16 connects the end of the engine 2 to a mounting portion 30 provided on the vehicle body at a position on the rotational axis O that is the center of vibration during operation.
Therefore, a sufficient vibration damping effect can be obtained. Then, such engine mount member 1
6, and connects clamping parts 19a and 19b fixed to both side surfaces of the engine 2,
Then, a connecting part 2 from which a bracket part 22 protrudes which is attached to a mounting part 30 provided on the vehicle body.
0 is assumed to be disposed through a gap S formed between the end surface of the engine 2 on the side where the timing belt 6 is disposed and the timing belt cover 9, and for example, the outer circumference of the timing belt cover 9. As a result, the engine mount member 16 is made relatively small-scale, and the end face portion of the engine 2 on the side where the timing belt 6 is disposed. Even if auxiliary equipment such as the water pump 8 is installed in the engine 2, it can be easily attached to the engine 2.

(Effects of the Invention) As is clear from the above description, according to the automobile engine mount structure according to the present invention, the engine is mounted and supported on the automobile body with its crankshaft extending along the vehicle width direction. In doing so, the end where the power transmission means for transmitting the rotation of the engine's crankshaft to the camshaft is arranged is mounted on the vehicle body at a position on or near the rotational axis of the engine via a mount member. It can be connected to the mounting part, and as a result, a sufficient vibration damping effect can be obtained. In addition, when connecting the end of the engine and the mounting part of the vehicle body, the mounting member disposed between the engine and the mounting part of the vehicle body has a small number of parts, and is relatively small and lightweight. In addition, it is possible to easily attach various auxiliary equipment to the end of the engine, and the serviceability of the engine is not impaired.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an example of an engine mount structure for an automobile according to the present invention together with a portion of the engine supported by the vehicle body, FIG. 2 is a sectional view taken along the line - in FIG. 1, and FIG. 3A , B and C are diagrams used to explain the manner in which a conventional engine and a vehicle body are connected. In the figure, 2 is the engine, 4 is the camshaft pulley, 6 is the timing belt, 9 is the timing belt cover, 10 is the cylinder block, 12 is the cylinder head, 16 is the engine mount member, 19a and 19b are the holding parts, and 20 is the connection. 22 is a bracket portion, and 30 is a mounting portion.

Claims (1)

[Claims] 1. One end surface of the engine, on which the engine and a power transmission means for transmitting the rotation of the crankshaft to the camshaft are arranged, so that the engine is attached to the vehicle body with the crankshaft extending along the vehicle width direction. and a mounting portion provided on the vehicle body, which is arranged opposite to the engine at a position on or near the rotational axis of the engine, and is connected via a mount member, and the mount member is , a clamping part fixed to a portion of each of the side surfaces of the engine sandwiching the rotational axis in the vicinity of the one end face part, and a clamping part disposed between the one end face part and the power transmission means to support the clamping part. An engine mount structure for an automobile, comprising a connecting part and a bracket part that projects from the connecting part and is supported by the mounting part.