JPS5876323A - Supporting device for car power plant - Google Patents

Abstract

PURPOSE:To obtain a sufficient resistivity against vibration even at the time of acceleration or deceleration by providing a sideways-placed engine with connecting pipes respectively connecting between the upper and the lower liquid chamber of an oil cylinder and the lower and the upper liquid chamber of another cylinder on both sides of the engine. CONSTITUTION:Against great vibration at the time of acceleration or deceleration, mount bushes cannot restrain it within clearances S1-S4. Brackets 17 and 18 are brought in contact with contact plates 24, 25, 34, and 35, and pistons 22 and 32 are operated via piston rods 23 and 33. Then, since operation liquid is introduced into a liquid chamber H3 from a liquid chamber H2 via a connecting pipe 20, the piston 32 is moved in a direction C. A free piston chamber 27 and a gas chamber 30 are provided under a cylinder 21. Consequently, when the piston 22 is moved in a direction A, the pressure in the liquid chamber H2 is increased to push down the free piston 27, and pistons 22 and 32 can be moved smoothly.

Description

[Detailed description of the invention] The present invention is an automobile power plant support device.

In particular, it relates to a support device for a horizontal engine.

Due to its arrangement relative to the vehicle body, a horizontally mounted engine requires a special support structure to provide vibration isolation during no-load and low-load operation, as well as vibration isolation during acceleration and deceleration.

The present invention was proposed in view of the above circumstances, and provides vibration isolation during no-load and low-load operation.
The purpose of this device is to provide an automobile power plant support device that exhibits a sufficient vibration-proofing effect even during acceleration and deceleration. The front and rear oil cylinders are inserted with a small gap between the arm members protruding on both sides of the vehicle and the opposing vehicle body side, and the upper and lower fluid chambers of one of the oil cylinders. An embodiment of the present invention is described with reference to the drawings. FIG. 1 is a plan view thereof; 2 is a side view of FIG. 1, FIG. 3 is an explanatory view of the operation of FIG. 2, and FIG. 4 is a longitudinal sectional view showing a modification of the Ω cylinder shown in FIG. 3.

In the above diagram, l is a transverse engine (hereinafter referred to as power plan) with a clutch and transmission 2), 3 is a toe board, 4 is a front end cross, and 5
1 is a center member, 6 and 7 are brackets protruding from the vehicle body B, 8 is a bracket protruding from the transmission 2, 9 is a mount bush inserted between brackets 7 and 8, and 10 is an engine. Bracket 11 protrudes from l, bracket lO and bracket 6
12 is a bracket protruding from the center member 5; 13 is a bracket protruding from the side of the engine 1; 14 is a bracket 12.1;
The mount bush inserted between 3 and 15 is the engine l.
A rear mount unit 16 is inserted between a bracket 17 protruding from one side of the engine and the center member 5, and a rear mount unit 16 is inserted between a bracket 18 protruding from the other side of the engine l and the center member 5. Front mount unit, 19
are the liquid chambers H1 and 70. of the rear mount unit 15. a communication pipe 2 communicating with the liquid chamber H4 of the mount unit 16;
0 is a communication pipe that communicates the liquid chamber H2 of the rear mount unit 15 with the liquid chamber H3 of the front mount unit 16. 21 is a piston 22. A cylinder into which a piston rod 23 and a free piston 27 are inserted.The piston 22 divides the upper part of the cylinder 21 into two liquid chambers H1 and )I2, and the free piston 27 divides the lower part of the cylinder 21 into a liquid chamber H2 and a gas chamber 30. 2 minutes. Reference numerals 24 and 25 denote abutting members that protrude parallel to the upper part of the piston rod 23, and the bracket 17 has gaps Sl and S2 between the abutting members 2 and 25, respectively.
It is facing 4.25. 26 is an orifice drilled in the piston 22; 28 is a stopper protruding from the inner surface of the cylinder 21 to give the free piston 27 an upper limit stroke S5; 21 to 30 cooperate to form the rear mount unit 15.

31 is a piston 32. Piston rod 33°
in the cylinder that interpolates.

The piston 32 divides the upper part of the cylinder 31 into two liquid chambers H3 and H4. %34.35 is a contact member that projects parallel to the upper part of the piston rod 33, and the bracket 18 has gaps 83 and S4. The abutting members are 34° and 35° respectively.
36 is an orifice bored in the piston 32, and 31 to 36 cooperate to form the front mount unit 16.

In such a device, the power plant P is supported on the vehicle body side bracket 7.6 via the mount bushings 9.11 by the platters 8.10 on both ends, and the mount bushes 14 on the lower part. By being supported by the center member 5 through the Also, vibrations of the power plant P can be sufficiently absorbed during low-load operation, and the purpose of vibration isolation can be achieved.

However, such a mount M″L 91 1
11 and 14 cannot withstand large vibrations of the power plant due to reaction force transmitted from the drive system during acceleration and deceleration, and furthermore, an exhaust pipe connected to the power plant.

Supply pipes for fuel, cooling water, etc., and various operation wires.

It is also necessary to suppress the displacement of the transmission operating rod to some extent, but this can be done by making the mount bushes 9, 11, and 14 hard so as to exhibit a vibration-proofing effect and durability during acceleration and deceleration of the power plant. Vibration isolation during load and low load operation becomes impossible.

The present invention solves this problem by using a rear mount unit and a front mount unit.

First, the input is small during no-load and low-load operation, so
Brackets 17 and 18 were installed on mount units) 15 and 16. Clearance S l + 82 +
Since it vibrates within 83 + 84, bracket 17
．． The vibration of 18 is not transmitted to the pistons 722, 32,
Elastic member of mount bush 9. It is absorbed only by It,14.

Next, in response to large vibrations during acceleration and deceleration, the mount bushings 9, 11.14 have a clear space S1, 82.
It is no longer possible to suppress the vibration inside S3, 84, and the bracket 17.18 is moved to the abutment plate 24. 25. 34.
'35, and press the piston rod 23°3 in the following manner.
3, the piston 22.32 will be actuated.

f-1, that is, in Figure 3, first, the power plan)
Describing the case where P rolls in the R direction, the piston 22 moves A through the contact plate 25° and the piston rod 23.
move downward in the direction. , 5 Then, the working fluid flows from the fluid chamber H2 through the communication pipe 2o and into the fluid chamber H3, so that the piston 32 moves in the C direction.

Concerning the liquid chambers H1l and H4, the hydraulic fluid flows out from the liquid chamber H4, contrary to the above.

Assuming that the cylinders 15 and 16 have the same size, the diameter of the piston rod 23 and 33 is d.

The cross-sectional area is Al, and the diameter of the piston is 22.32.

The cross-sectional area is A2, and for simplicity, Oriswiss 26.3
6 does not act, the volume change of the liquid chamber H1 is V1=SAX (A2-AI), the volume change of the liquid chamber H2 is V2=-8, AXA2, and the volume change of the liquid chamber H4 is V4=-Vl.

In addition, SA is the stroke of the piston rod 23.

Based on the above relationship, the stroke SB of the piston 32 in the C direction can be obtained as the following formula.

Therefore, the volume change of the liquid chamber H3 (3) is as follows.In order for both pistons to act smoothly, v2 + v is required.
It is necessary that 3=0, and this relationship is realized as follows.

That is, a free piston 27 is provided at the bottom of the cylinder 21.
Since a gas chamber 30 is provided, when the piston 22 moves in the input direction, the pressure in the liquid chamber H2) increases and pushes down the free piston 27.The amount of hydraulic fluid flowing out from the liquid chamber H2 is -(A2-A1)2, so the pistons 22.32 can move smoothly.

Although the above description has been made regarding the displacement of the rear mount unit 15 in the A direction, substantially the same effect is performed in the direction opposite to A and with respect to the front mount unit 16.

At that time, the piston 22.32 has an orifice 26.3.
6 is provided to prevent sudden oil lock and also to obtain sufficient damping.

In this way, when the puffy brand P tries to roll, the two mount units 15 and 16 mutually work to suppress the rotation of the power plant P.

Furthermore, regarding the bouncing of the power plant P, when the power plant P moves in the D direction, the pistons 22 and 32 move upward through the contact plates 24 and 34.

Here, since the sum of the volumes of the liquid chambers HI, H2, H3, and H4 is constant, the volume of the gas chamber 3o increases by the amount that the piston rod 23.33 moves upward.

The movable amount of the free piston 27 is set to 85, and the stroke of the piston 22. is Sp in the above equation, and bouncing can be suppressed.

At this time, it is possible to obtain damping by providing a drilling device in the communication pipe 19, 20, and by using a cushioning material such as rubber for the stopper 28, sudden locking can be alleviated.

In the case of bouncing of the power plant P in the direction opposite to D (downward), the gas chamber 30 is reduced by the amount that the piston rod enters the cylinder, so it is substantially the same as above, but the compression of the gas chamber 30 is In this case, a mechanical stopper similar to the stopper 28 may be provided, or a gas reaction force may be used to act as a stopper.

In the above embodiment, the piston and piston rod diameter of each mount unit are the same, but by making the piston and piston rod diameter different in each mount unit, the displacement during acceleration and deceleration is It also becomes possible to control various things.

Furthermore, as shown in Figure 4, a spring force can be applied to the top surface of the piston to balance the pressure in the gas chamber and determine the position of the piston. A spring may also be applied.

In short, according to the present invention, elastic members each inserted between the front and rear ends of a horizontal engine and the opposing vehicle body side;
The front and rear oil cylinders are inserted with a small gap between the arm members protruding on both sides of the engine and the opposing vehicle body side, and the upper and lower fluid chambers of one of the oil cylinders. The lower liquid chamber of the other oil cylinder above the liquid chamber respectively.

By providing a communication pipe that communicates with the upper liquid chamber, an automobile power plant support device is obtained that exhibits a sufficient vibration-proofing effect during no-load, low-load, and acceleration/deceleration, and therefore the present invention is industrially advantageous. It is extremely useful.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing one embodiment of the present invention, and Fig. 2 is a plan view showing an embodiment of the present invention.
3 is a side view of the figure, FIG. 3 is an explanatory view of the operation of FIG. 2, and FIG. 4 is a longitudinal sectional view showing a modification of the cylinder of FIG. 3. 1. Engine, 2. Clutch and transmission, 3. Toe board, 4. Front end cross, 5. Center member, 6.7. Bracket, 8.
bracket. 9. Mount bush, 10. Bracket. 11...Mount bush, 12...Bracket, 13
-・Bracket, 14・・Mount bush, 15・・
Rear mount unit, 16...front mount unit. 17+ 18...Bracket, 19,20...Communication pipe, 21...Cylinder, 22...Piston. 23...Piston rod, 24.25...Abutting member, 2
6. Orifice, 27. Free piston, 28.
Stopper, 30... Gas chamber, 31... Cylinder, 32...
·piston. 33... Piston rod, 34. 35... Contact member, 3
6. Orifice, sub-agent patent attorney Masafumi Tsukamoto

Claims (1)

[Scope of Claims] Elastic members inserted between the front and rear ends of a horizontally mounted engine and the opposing vehicle body side, arm members protruding from both sides of the engine, and the vehicle body side facing each other. The front and rear oil cylinders are inserted with a small gap between them, and the upper liquid chamber of one of the oil cylinders. An automobile power plant support device characterized in that the lower liquid chamber is provided with a lower liquid chamber and an upper liquid chamber (with a communicating pipe) of the other oil cylinder.