JPH04203345A - Mount supporting structure of engine - Google Patents

Abstract

PURPOSE:To improve supporting rigidity of an engine mount arranged at one side by installing an auxiliary stay at the end surface of one side of a cylinder block. CONSTITUTION:An auxiliary stay 60 is protrudingly-installed in a fork form from a mount stay 50, and the mount stay 50 is installed at the outside peripheral part of one end of a cylinder block 10. Moreover, the auxiliary stay 60 is installed near the return passage 56 of a cylinder head 12 to improve the installation rigidity of the mount stay 50. The return passage 56 which guides return lubricating oil of a power transmission mechanism 28 is protruded outside from the cylinder head 12 to increase wall surface rigidity of the return passage 56 part. By increasing the installation rigidity of the auxiliary stay 60 like this, it is possible to increase the supporting rigidity of the engine mount installed on the mount stay 50 largely.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an engine mount support structure, and particularly to an engine mount support structure in which one of the engine mounts is disposed outside one end of the cylinder block. Regarding mount support structure.

(Prior Art) In general, as an engine mount support structure, a plurality (3 to 4) of mounts are arranged along the main axis of inertia of a power plant consisting of a combination of an engine, a transmission, etc. (Refer to the New Automobile Engineering Handbook published by the Society of Automotive Engineers of Japan in 1986: Volume 4, pp. 1-49).

By the way, when mounts are arranged along the principal axis of inertia in this way, one of the mounts is arranged at one end of the cylinder block (the side opposite to the transmission connection side) in a horizontal engine; There are pumps, belts, etc. on one end surface (side surface).

For this reason, conventionally, the mount has a single stay structure, which is attached to a thick wall portion on the outside of one end of the cylinder block.

(Problem to be Solved by the Invention) However, in the conventional engine mount support structure, since the mount stay is arranged at one end of the cylinder block, it is difficult to ensure sufficient bending rigidity. This results in a decrease in the support rigidity of the mount.

For this reason, the power plant shakes violently when idle vibration or engine shake occurs, which is a large amplitude region, and when such large shakes occur, the space for installing the engine is inevitably reduced to avoid interference with other parts. The problem was that this required a large amount of space, making the layout within the narrow engine room extremely difficult.

In view of such conventional problems, the present invention devises the end surface structure of one end of the cylinder block and provides an auxiliary stay on this end surface, thereby significantly improving the support rigidity of the engine mount disposed on the one end. The purpose of the present invention is to provide an engine mount support structure that is capable of supporting an engine.

(Means for Solving the Problems) In order to achieve the above object, the present invention includes a power transmission mechanism that interlocks a pair of camshafts arranged in a cylinder head, and a power transmission mechanism that interlocks a pair of camshafts arranged in a cylinder head, and a cylinder block in which this power transmission mechanism is arranged. In an engine mount support structure in which a mount stay is attached to the outside of one end, a lubricating oil return passage of the power transmission mechanism is formed in one end surface of the cylinder head by bulging out, and near the bulging return passage, It is constructed by attaching an auxiliary stay that serves as a support for the mount stay.

Further, it is preferable that the auxiliary stay is installed so as to straddle the lubricating oil return passage and the vicinity of a fitting portion of the water pump formed in the cylinder block.

(Function) In the engine mount support structure of the present invention with the above configuration, the lubricating oil return passage of the power transmission mechanism that interlocks the pair of camshafts is formed in a bulging manner on one end surface of the cylinder head. The rigidity near this bulged return passage can be increased, and an auxiliary stay that serves as a support for the mount stay is installed near this bulged part with increased rigidity, so the engine mount can be attached to the mount stay. Since it is supported by a highly rigid auxiliary stay, the supporting rigidity of the engine mount can be significantly improved.

In addition, since the auxiliary stay is installed across the lubricating oil return passage and the vicinity of the water pump fitting part formed in the cylinder block, the mounting rigidity of the auxiliary stay is increased by the reinforcement structure of this fitting part. It is possible to further increase the amount of

(Example) Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

1 and 2 show an engine mount support structure showing an embodiment of the present invention. FIG. 1 is a side view showing one end surface of the cylinder block 10 with the cover removed, and FIG. FIG. 2 is a cross-sectional view of a portion corresponding to line A-A of FIG.

A cylinder head 12 is provided at the upper end of the cylinder block 10, and a pair of left and right camshafts 16, 18 are disposed within the head cover 14.

A crankshaft (not shown) is transmitted to the camshafts 16 and 1.8 via a belt 20, and a chain 26 is wound around sprockets 22 and 24 provided on the camshafts 1.6 and 1.8, respectively. These sprockets 22, 24 and chain 26 constitute a power transmission mechanism 28.

The pair of camshafts 16 and 18 are rotated in synchronization with each other by the power transmission mechanism 28, and lubricating oil is sprayed onto the chain 26 from an adjuster 30 for tension adjustment. , this power transmission mechanism 28 is lubricated.

In addition, in FIG. 2, 31 indicates a valve timing adjustment mechanism.

On the other hand, a water pump 32 is disposed at one end of the cylinder block 10 between the crankshaft and the cylinder head 12, and this water pump 32 is a part of the cylinder block 10. It is fixed to the periphery of a fitting portion 34 (see FIG. 2) formed on the end surface 10a.

Therefore, the peripheral edge of the fitting portion 34 is connected to the water pump 32.
In order to attach the water pump 32, it has a thick wall structure, and its rigidity is increased to ensure the mounting rigidity of the water pump 32.

Note that 36 is a drive pulley for the water pump 32.

By the way, the engine is combined with a transmission (not shown) toward the back side of the paper in FIG. 1 to form a power plant.
This power plant is supported on the vehicle body side (not shown) through a number of engine mounts, and one of these engine mounts is attached to the periphery of the front side (left side in FIG. 1) of one end of the cylinder block 10. It can be attached to the part.

Reference numeral 50 denotes a mount stay of the engine mount (not shown), and this mount stay 50 is attached to a more rigid portion of the front peripheral edge of the cylinder block 10 via a mounting bolt 52.

Incidentally, an engine mount main body (not shown) is attached to the bolt 54 implanted in the mount stay 50.

In this embodiment, the return of the lubricating oil that lubricates the power transmission mechanism 28 is located below the power transmission mechanism 28 and on one end surface of the cylinder head 12 (on the front side of the paper in FIG. 1). The passage 56 is formed by bulging outward.

That is, a bolt 58 for connecting the cylinder head 12 and the cylinder block 10 is attached to the inside of the cylinder head 12 at a portion where the return passage 56 is formed, and the return passage is formed by avoiding the bolt 58. 56
By expanding the return passage 56, the passage area of the return passage 56 can be increased.

Further, by forming the return passage 56 in a bulging manner in this manner, the vicinity of the portion where the return passage 56 is formed has high rigidity.

Further, in this embodiment, an auxiliary stay 60 is provided integrally with the mount stay 50 in a bifurcated shape, and this auxiliary stay 60
is attached near the return passage 56 of the cylinder head 12.

The auxiliary stay 60 has a base end portion 60a and a tip attachment portion 60b.
The tip attachment portion 60b is attached to the lower portion of the return passage 56 via a pole 62.

The base end portion 60a is coupled to the distal end attachment portion 60b via a bolt 64, so that the auxiliary stay 60 becomes one rigid column and functions as a support for the mount stay.

Further, the tip attachment portion 60b is attached to the lower side of the bulging portion of the return passage 56, and at the same time, the return passage 56
A fitting portion 34 of the water pump 36 is present below the water pump 36, and the tip attachment portion 60b is attached to straddle the peripheral edge of the fitting portion 34.

With the above configuration, in the engine mount support structure of this embodiment, the engine mount disposed on the front side of one end of the engine (the side opposite to the mission salt (= side I side)) is This mount stay 5
The auxiliary stay 60 is protruded from the 0 in a forked shape, and the mount stay 50 is attached to the outer peripheral edge of one end of the cylinder block 10, and the auxiliary stay 60 is attached near the return passage 56 of the cylinder head 12. The mounting rigidity of the mount stay 50 is significantly improved through the auxiliary stay 60.

In particular, the return passage 56 is a passage for guiding the return lubricating oil of the power transmission mechanism 28, and is formed to bulge outward from the cylinder head 12, so that the wall surface rigidity of this return passage 56 portion is increased. .

Therefore, the rigidity of the auxiliary stay 60 is also increased, and as a result, the supporting rigidity of the engine mount attached to the mount stay 50 can be greatly increased.

Therefore, even if a large rocking force acts on a power plant supported by multiple engine mounts, the rocking of the power plant can be prevented with a small amplitude, reducing the space required to install the power plant. can do.

Further, the auxiliary stay 60 includes, in addition to the return passage 56,
Since it is attached across the periphery of the fitting part 34 of the water pump 32, the mounting rigidity of the auxiliary stay 60 can be further increased by the increased rigidity of the periphery of the fitting part 34. .

(Effects of the Invention) As described above, in the engine mount support structure according to claim 1 of the present invention, the lubricating oil return passage of the power transmission mechanism that interlocks the pair of camshafts is provided on one end surface of the cylinder head. By forming a bulge, it is possible to increase the rigidity near this bulged return passage, and an auxiliary stay that serves as a support for the mount stay is installed near this bulged part with increased rigidity. Therefore, the support rigidity of the engine mount can be significantly improved.

Therefore, the rocking of the power plant can be reliably controlled to the minimum necessary amplitude, and the space required for its installation can be reduced, making the layout in a narrow engine room easier.

Further, in claim 2 of the present invention, the auxiliary stay is attached to straddle the lubricating oil return passage and the vicinity of a fitting portion of the water pump formed in the cylinder block, so that the auxiliary stay Each of the supplements has the excellent effect of further increasing the mounting rigidity of the stay.

[Brief explanation of the drawing]

FIG. 1 is a side view of an engine with a cover removed showing an embodiment of the present invention, and FIG. 2 is a sectional view of a portion corresponding to line 8-A in FIG. 10...Cylinder block 10a...One end surface 12...Cylinder head 16.18...Camshaft 28...Power transmission mechanism 32...Water pump 34...Water pump fitting part 50. ...Mount stay 56...Lubricating oil return passage 60...Auxiliary stay

Claims (2)

[Claims] (1) An engine mount support structure comprising a power transmission mechanism that interlocks a pair of camshafts arranged in a cylinder head, and a mount stay is attached to the outside of one end of the cylinder block in which the power transmission mechanism is arranged, A lubricating oil return passage of the power transmission mechanism is formed in one end face of the cylinder head by bulging out, and an auxiliary stay serving as a support for the mount stay is attached near the bulging return passage. Engine mount support structure. (2) The engine according to claim 1, wherein the auxiliary stay is installed across the lubricating oil return passage and near a fitting portion of the water pump formed in the cylinder block. Mount support structure.