JPS6050009A - Characteristics control device in shock absorber mounting bush - Google Patents

Abstract

PURPOSE:To improve the steering stability as well as ride quality by providing a fluid pressure control valve to a hollow cylindrical body so that when the vehicle is stationary and is seated to its capacity the fluid supply mode may be maintained for a certain duration, and then the fluid circuit remains to be closed. CONSTITUTION:When the vehicle is stationary and is seated to its capacity, pressure sensors 60-62 are turned on, and ''YES'' signals SB-SD and ''vehicle speed zero'' signal SA from a vehicle speed judgment circuit 64 are respectively outputted to an AND circuit 71. Based on them, the AND circuit 71 outputs a ''YES'' signal SEX to a solenoid valve actuating circuit 74. Upon receiving the signal SE, the actuating circuit 74 energizes first and second solenoid valves 53, 54 to pressurize a hollow cylindrical body. After a certain duration, an output signal SF from a monostable multivibrator 75 is switched to ''low'' signal, and the solenoid valves 53, 54 are deactivated to maintain the inner pressure of the hollow cylindrical body at a pressurized condition. In this manner, suspension characteristics are automatically adjusted to the fully occupied vehicle condition, and the steering stability and ride quality can be improved.

Description

Detailed Description of the Invention (Industrial Field of Application) This light is applied to shock absorbers for vehicles, and the 1% suspension is used as a device for controlling the pressure of -i2 and raft installation. Buy something from Seki.

(Conventional technique Iho [) The above - Shiba Butshu is its main A・;i5ν', :8
By determining the elongation and shape of the living body of Oki 1, which is S material, by selectively embedding the insert part in the bending or bending body, the Lebrach damping characteristics or It is possible to change the spring characteristics. However, after the shock absorber is supported on the vehicle body, the damping characteristics of the bushing are uniquely determined, and in order to maintain this elasticity, the elastic body must be replaced.

The characteristics of the above-mentioned 1V suspension are usually set so that they can be adapted to driving conditions where the LH is often used.
Rir. Therefore, for example, when a 141-car is run with all regular passengers on board, the oscillations of the umbilical bushings are too small and the oscillations are too small, resulting in unstable steering and poor ride comfort. It rarely happens.

(Objective of the Invention) The H' point of this defense is to automatically change the characteristics of the @ rack bush when running for a limited number of military ambushes to the shape of ayu passed through a loop, thereby stabilizing the maneuverability. In addition, the present invention also provides a suspension bushing with a characteristic annoyance control system that can improve riding comfort.

(Authorization of the invention) In order to achieve the above purpose, this defense is constructed as follows. That is, a hollow bag body is provided inside the elastic body forming the suspension bush, and the characteristics of the bullet body can be changed by supplying or discharging pressure fluid into this rope body. It looks like this. The fluid pressure circuit of the hollow bag is provided with a pressure control valve that can selectively switch between supplying pressure fluid to the bag, discharging it, and closing the pump circuit. The control path 1111, which electrically controls this pressure control valve, is used when the vehicle is stopped,
And when the number of passengers is on board, the above pressure) 1-3 valves are set to 1f at a certain time.
11 is maintained in the supply state, and K (hy) is configured to issue a signal to keep the fluid pressure circuit closed.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

In No. 1M and No. 21 ¥1, which represent shock absorber mounting bushes (upper supports or (also called d strut mounts) ), and the sentence ``J oO'' is 1. A remanufactured connecting member 22 is connected, and a pole bearing 28 that supports the upper end of the piston rond (none of which is shown) of the shock absorber is fixed to this construction material 22.

The above-mentioned elastic body 26 is vulcanized and dried 6 to the supporting member 14 and the connecting member 22, respectively, and as is clear from the internal QCf'i No. 2v, there are multiple disturbances (13
1, four hollow portions 25 are formed in the shape hx. In these hollow parts 25, there are rubber-like push ring marks l.
A hollow bag body 66 having a length of 8 mm is formed from the material. In addition, each of these inner wall bag bodies 36i, J: SohachizogLl gold 3
8 years old, each cap 68 has an arrow extending from the outside of the support member 14,
There, the hose 26 is buried. these hoses 2
Pressure fluid such as oil is supplied to or discharged from each of the suppressors 66 through 6 .

By controlling the supply and discharge of this pressure fluid, the elastic body 2
6's splash characteristics and damping characteristics can be changed.

Next, the fluid ratio circuit 50 that controls the supply and discharge of pressure fluid to and from the valley hollow bag 66 will be explained with reference to FIG. This fluid pressure circuit 50 includes a pump 51 for pumping pressure fluid (for example, oil). Reservoir tank 52. and 1st - magnetic 4
The pressure control valve A includes a r56 and a second electromagnetic valve 54. Both 1 that make up this pressure control valve A
- The magnetic valves 5 and 54 are arranged in series in the fluid pressure circuit 50. The 1'1E magnetic cell 56 constitutes the entire return path of the pressure fluid from the hollow bag body 66 to the reservoir tank 52 as shown in the figure in a non-oiled state. In the non-hydraulic straight light as shown in Figure 1, the second 2' inductor solenoid valve 54 closes the fluid pressure circuit 50 and closes this circuit 50 by bending. Therefore, depending on the combination of energization, energization, and de-energization of both electromagnetic valves 53 and 54, the pressure inside the hollow binding plate 66 changes as shown in the following table.

The following table shows the above pressure side 41 valves, 1, 1, and 1 for 53 and 54 valves. Flow (■jl military + non-IY4 '1pi
C system], ) 11 system 21 [11th circuit, 4th
This will be explained using figures. 1. This circuit B has four input terminals 56 to 59'iz, of which the pressure sensors 60 to 62 are connected to the Mioka input terminals 56 to 5B, and the remaining input terminal 59 is connected to the pressure sensors 60 to 62. The single sensor 66 is installed in a bale and one electric awn. Each of the pressure sensors 60 to 62 is, for example, a core cord sensor for the H2 seat (not shown), and can be turned on or off depending on whether an occupant sits on the seat or not, and can be turned on or off depending on whether an occupant sits on the seat or not.
Or, a pre-determined vehicle ridden by
At this time, all the sensors 60 to 62 are turned on. In short, these pressure sensors 60 to 62 are used to detect whether the vehicle is being loaded or unloaded by the occupants, and therefore, they can be replaced with, for example, an internal pressure sensor of a shock absorber.

Vehicle speed sensor 63! Usually, the blade is turned on and off with a rotation rate proportional to the rotation of the grinding stone, which is cut into the shaft of the blade.

j! ii degree A41 constant 1... road 64 is the vehicle tracing sensor 66
Converting the empty pulse train signal into heavy pressure/(MenoF/
2) Setting device 66 and the heavy pressure IR from the F/V converter 65 are set by the setting device 65.
High signal full output 1 when 'rtt pressure value from 6 exceeds
- I like Con Valley 1'67. The signal from this comparator 67 will hereinafter be expressed as 5A-C'. In addition, the system zero and low pressure of the above-mentioned regulator 66 is determined by our company when both MN and MN are stopped.
I am attending a cram school on the ground.

The pressure determination circuits 68 to 70, nj and 74 each have transistors TRI to TR3f, which output high and low signals in response to the ON and OFF states of the pressure sensors 60 to 62, respectively. .

These valleys (-:1 constant circuit 68~70'>j・etc. 1.・
The numbers will be hereinafter referred to as SB and SD.

The AND circuit 71 is for matching the above numbers SA and SD.
D is all high) When the input is made with the - symbol, lf is high:;
−′; Outputs +. A: and - from the AND circuit 71 will be expressed as SE hereinafter.

The valve VA circuit 74 is the multi-vibrator 7
5.76 (hereinafter referred to as C (abbreviated as "r (-stable)"), exclusive 'pjp 211 + sum circuit 77 (hereinafter referred to as "EXORJ
), and 1,1'! The asthma organ is 78.79% higher than Sakaki Seiren.

The monostable 75 is the output signal from the uIJ AND circuit 71.
When SE rises, 1tll high is output at a certain time. Next is this output No. 1g k SF. The other monostable 76 (G) outputs a full high signal depending on the fall of the above signal SE, and this output signal is represented by SG.
It outputs the exclusive disjunctive sum of the respective signals Sr and SG, and these output signals are coated with SH. The above amplifiers 78 and 79 are connected to the above in-sign SF'', 3
1), and the output signals SF' and SH' cause the second solenoid valve 54 and the first solenoid valve 56 to operate at 11, respectively.
Make them work.

In the above configuration, J-car is stopped and MI
In case 4, each of the pressure sensors 60 to 62 is turned on, and the pressure determination circuits 68 to 70 of the pressure sensors 1 to 51 are turned on.
High signals SBj to SD1 shown by are output. At the same time] *S judgment: From the comparator 67 of the il road 64, the car]
is the output device. The AND circuit 71 inputting these high signals SA1 to SD1 outputs a fifth high signal 5E12. As a result, the 4-anchor pore 5 outputs the inertia 3F'1, which passes through the amplifier 78 and outputs 'ld+3'SF'1.
Therefore, do not energize the second turtle magnetic square 54.

With the 1.4 SF'1 from the monostable 75 mentioned above,
The BXOR 77 outputs the signal SH1, and the width amplifier 79
After that, it became the ship a SH'1 and became Hl, I Hlrer.
- Valve 56 is fully opened. This 2t et al. Gθ valve 53.54
According to the '7Ii, as is clear from the above table, the middle? ν
The internal pressure of the bag body 66 increases. Then, the above f (stable 7
The output signal SF1 from 5 becomes a low signal for a certain period of time as shown by jP, 5jQl, and each of the -jL control valves 53 and 54 becomes oil-free again. This makes it hollow! The internal pressure of each body 3 is maintained at the increased 1 inch.

After this, 畢n1η emits 11 (then the high signal SA1 from the previous 2 traces 1'j' judgment same 1 and each 64 becomes a low signal,
Along with this, the 1-cosa SE1 from the AND circuit 71 also changes to a low signal. Due to this, the high signal S from the monostable 76
G1 becomes an output term, and EXOR77 becomes high 16 again.
No. SH2 will be output. As a result, the amplifier 79 is bent and the output is n. 1st tun + j5 valve 5 by No. SH'2
Only 6 will be 1 yen'+Ui. This/kome, iii+
As is clear from the table of M, the internal pressure of the entire inner bag body 66 is not equalized. Then, the high signal SGi of the monostable 76 becomes a low signal after a certain period of time, and even if the first ζ:magnetic cell 56 becomes pregnant, the internal pressure of the inner wall bag body 66 is maintained to the increased level.

In this way, when carrying out heavy vehicle driving with one passenger capacity, the internal pressure of the hollow bag body 66 is kept high and the spring constant of the elastic body 26 of the 'H%ip bushing is increased, thereby improving steering stability. In addition, the riding comfort can be improved;
Although the case has been described in which there are four hollow bags 66, the number of hollow bags 66 can be increased or decreased freely, and for example, it is also possible to replace the hollow bags 66 with - number of hollow bags.

Of course, it is also possible to use a computer as the control circuit B mentioned above.

(Effects of the Invention) As described above, the present invention improves steering stability and riding comfort by improving the deflection constant of the suspension bush of the lock absorber when traveling at full capacity. can.

[Brief explanation of drawings]

The drawings show an example of the invention's 't < force, and Figure -81 shows the R
Figure 52 is a concave diagram of the ll-1 line 1υr of sheep 11-1, and Figure 6 is an outline of the bIE body pressure circuit.
: Figures 6 and 14 are circuit diagrams mainly based on the control circuit, and Figure 5 is a Guimchiard diagram showing the operation timing 'f!: due to temporal changes in the control circuit. 23... Elastic body 66...Hollow bag body 50...Fluid pressure circuit A...Pressure control valve B...Control circuit output F7Fj Person Toyota Motor Corporation representative Patent attorney Oka 1) Hidehiko

Claims (1)

[Claims] A shock absorber that has a hollow bag inside the elastic body and is made of a hollow material that changes the characteristics of the elastic body by supplying or discharging pressure and cables to the inside of the bag. 1, the fluid pressure circuit of the hollow bag body includes a pressure side valve that can selectively switch between supplying pressure fluid to the four bodies, and stopping (7) the H output or Iσ] path. The control circuit for controlling this pressure control (one-valve city-wide electricity) maintains the pressure control valve in a constant supply state of 1:11 when the vehicle is stopped and the maximum number of passengers is on board. Characteristics 1jlJ of the suspension bushing of the shock absorber, characterized in that the suspension bushing of the shock absorber is configured so that after the above-mentioned fluid pressure circuit is closed and held, the suspension bushing is brought out.