JP2561752Y2 - Mechanical shock absorber - Google Patents

Description

[Detailed description of the invention] [0001] The present invention relates to a vehicle suspension system,
More particularly, it relates to a mechanical shock absorber. [0002] BACKGROUND OF THE INVENTION Shock absorbers are used with automotive suspension systems
And absorbs unwanted vibrations that occur during operation. This
Shock absorbers to absorb unwanted vibrations
Generally connected between the vehicle body and the suspension
You. One piston is located inside the shock absorber
Connected to the car body via the piston shaft
You. The piston absorbs shock when the shock absorber is compressed
To restrict the flow of brake fluid in the operating chamber
Therefore, the shock absorber can generate a braking force,
Is transmitted from the suspension system to the vehicle body if there is no shock absorber
It works to suppress the vibration that is caused. Of the brake fluid in the working chamber
The more restrictive the flow or piston, the more
The braking force generated by the shock absorber increases. When selecting the amount of braking generated by a shock absorber
In addition, three vehicle performance characteristics are often considered. Riding
Comfort, maneuverability, and grounding performance. Riding comfort
In many cases, the spring constant of the main spring of the vehicle and also the seat
It is a function of spring constant, tire, and shock absorption. Maneuverability
Is related to changes in vehicle attitude (ie, roll
And pitch and swing). For optimal maneuverability
Prevents excessive sudden changes in body attitude during rotation, acceleration and deceleration.
Requires a relatively large braking force. Grounding performance
It is generally a function of the contact area between the tire and the ground. Contact
Great braking power is needed to optimize ground performance
This is because when traveling on uneven roads, the contact between the wheels and the ground
This is to prevent the touch from being lost longer than necessary. [0004] Ride comfort, car maneuverability and grounding performance
In order to optimize, generally produced with shock absorber
Various braking forces corresponding to the input frequency from the road
Is desirable. The input frequency from the road is a car
When it is almost equal to the natural frequency of the body (for example, about 0-2Hz)
Generally generates a large braking force as a shock absorber
Excessive body posture during cornering, acceleration and deceleration
Those that do not cause a sudden change are desirable. road
When the input frequency from is between 2-10Hz, the shock absorber
Gives a smooth ride with a small amount of braking power,
It is desirable to be able to follow road changes. road
Input frequency from the vehicle
(E.g., approximately 10-15 Hz)
To get a comfortable ride, have a relatively small braking force.
On the other hand, the contact between the wheel and the ground is lost more than necessary
It is desirable to have enough braking force to prevent
Good. [0005] The braking characteristics of the shock absorber are selectively changed.
One method is described in U.S. Pat. No. 4,597,41.
No. 1. In this example, one solenoid valve
Use to select the auxiliary opening that opens to the basic valve of the shock absorber
Open and close. Therefore, the basic valve is the working chamber of the shock absorber
The internal pressure is adjusted to control braking. Shock absorption
Another way to selectively change the braking characteristics of the collector
Method uses a pressure sensor, and the compression-rebound cycle of the shock absorber
The number of times, and also attached to the wheel support
The accelerometer measures the vertical speed of the car body.
The braking characteristics of the shock absorber change according to the vertical speed of the vehicle.
Will be updated. [0006] Selectively changing the braking characteristics of the shock absorber
Yet another method is described in British Patent GB2147 683 A.
Are listed. In one embodiment of this reference example, the valve circle
Use a plate to transfer the brake fluid between the top and bottom of the working chamber.
The flow path in the valve body to be moved is covered. The valve disc
The support is biased against the valve body and this
A part of the support member is disposed in the pressure chamber. The pressure chamber
Through the lower part of the working chamber and the first flow path, and the upper part of the working chamber
It is connected through the second flow path. Braking flowing through the second flow path
The flow of the liquid and thus the pressure in the pressure chamber acting on the support
An auxiliary valve plate is provided for adjustment. The auxiliary valve plate
It is arranged on the second flow path and is arranged on the valve body below the auxiliary valve plate.
It works in cooperation with the placed coil. The coil is excited
Then, the magnetic flux generated by the coil biases the auxiliary valve disc.
To deflect the auxiliary valve disk, and the second flow path and the working chamber
Enlarge the opening between the parts. Therefore the coil is the auxiliary valve circle
Move the plate to a position where more liquid flows through the second flow path
When deflected, the pressure of the brake fluid in the pressure chamber drops, and the support
Reduce the force transmitted from the material to the valve disc. Lower working chamber
The pressure inside deflects the valve plate and consequently flows through the flow path
The amount of brake fluid that increases is increased. [0007] SUMMARY OF THE INVENTION Accordingly, a first object of the present invention is to provide an automobile car.
Braking of body movements and also of the wheels and axles of the vehicle
To provide a mechanical shock absorber that can simultaneously realize
It is. [0008] Another object of the present invention is to turn a car.
Rolling, pitching or shaking during rolling, accelerating or decelerating
To provide a mechanical shock absorber capable of resisting the tendency to
And Still another object of the present invention is to provide a road within an acceptable range.
Securing the frictional force between the road surface and car tires to brake the car
Mechanical shock absorbing device capable of maintaining speed and deceleration performance
Is to provide an installation. Another object of the present invention is to provide a different driving ring.
Adjustable car body according to the environment and different driving habits
To provide a mechanical shock absorbing device capable of generating various braking characteristics
That is. A further object of the present invention is to provide different types of
High flexibility when mounted on a car
Providing a new and improved direct-acting fluid shock absorber
That is. In this regard, in connection with the purpose of the present invention,
Stated mechanical shock, relatively low cost and relatively easy to maintain
It is to provide an absorption device. A more specific object of the present invention is to provide a
Depending on various operating conditions, the flow of the brake fluid through various flow paths
To control the braking force generated by the device by controlling
Using a solenoid, a new modification that satisfies the characteristics described above
It is to provide an improved shock absorber. [0013] Still another object of the present invention is as follows.
Is to provide a shock absorber as described in which braking
The force is calculated according to the pressure difference between the two parts of the working chamber of the device.
It is to provide a shock absorber controlled by a computer. Another object of the present invention is to provide a vehicle body having a braking force.
Mechanical control controlled by the computer in response to the vertical motion of
It is to provide a shock absorbing device. [0015] Still another object of the present invention is to provide braking.
Power is controlled by the computer and the computer
Program to achieve different braking characteristics
It is to provide a mechanical shock absorbing device that can be obtained. [0016] FIG. 1 shows four preferred embodiments of the present invention.
A shock absorbing device 20 is shown. The shock absorbing device 20
The operation state in the conventional automobile 22 which is schematically drawn is shown.
It is shown as forgotten. The car 22 is a rear suspension 2
4 which extends laterally and can operate the rear wheels 28 of the vehicle
And a rear axle 26 for support. Axle 26
Is a operable pair of shock absorbers for the car 22
Device 20 or similarly connected by a helical coil spring 30
I have. Similarly, the vehicle 22 has a front suspension 32,
It extends laterally and operably supports the front wheel 36
Front axle 34 for the vehicle. The front axle 34 is operable
The second pair of shock absorbing devices 20
And a helical coil spring 38. Shock absorption
The collecting device 20 is provided on the non-spring portion of the automobile 22 (that is, in the front
And rear suspensions 32 and 24) and a spring-loaded part
That is, it works so as to attenuate the relative movement with the vehicle body 39).
Good. Although the automobile 22 is depicted as a passenger car,
The collector 20 can be used in other types of vehicles as well. FIG. 2 shows an impact according to an embodiment of the present invention.
An absorber 20 is shown. Shock absorber 20 is a long tube
Pressure cylinder 40, which is provided with the brake fluid storage working chamber 4
2. A vertically moving piston 4 is provided in the working chamber 42.
4 which is located on the auxiliary extension piston shaft 46
It is fixed to one end. The piston 44 has an annular groove 4
8 is cut off and the piston
Ring 50 is held. Piston ring 50 is fixed
When the piston 44 moves, the brake fluid is
Flow between the cylinder and the inner wall of the cylinder 40 is prevented.
The base valve, generally designated 52, is a pressure syringe.
It is located on the inner bottom of the
Used to control the flow of brake fluid to and from the sump 54
It is. The annular liquid reservoir 54 is provided between the outer wall of the cylinder 40 and a liquid reservoir tube or the like.
Is a cylinder 56 concentrically surrounding the outside of the pressure cylinder 40.
It is the space between the inner wall. Structure and operation of base valve 52
Is disclosed in U.S. Pat.
No. 1,626. The upper and lower ends of the shock absorber 20 are
Top and bottom caps 58 and 60
Provided. End caps 58 and 60 are liquid reservoirs
56 at both ends by suitable means such as welding, for example.
ing. The shock absorber 20 is provided with a dustproof device 62.
The upper end of the dust shield is shown at the upper end of the piston shaft 46.
Fixed. The preferred end fitting 64 is the piston shaft 4
6 attached to the upper and lower caps 60
The shock absorber 20 is connected to the body and axle members of the automobile 22.
It plays the role of being movably mounted between. This technology
As a skilled technician can understand,
The brake fluid in the pressure cylinder 40 operates during the reciprocating motion of Step 4.
Between the upper and lower portions of the chamber 42, the working chamber 42 and the reservoir 54
To move between. Control between the upper and lower parts of the working chamber 42
By controlling the flow of the hydraulic fluid, the shock absorber 20
Do not control the relative movement between the body of the motor vehicle 22 and the suspension.
Braking, thereby reducing riding comfort and road holding power
Both can be optimized. To achieve this goal,
44 is equipped with a new and improved valve
The piston controls the flow of the brake fluid between the upper and lower parts of the chamber 42.
It is selectively controlled during repetitive exercise. The details are as follows
This is explained below. According to the first embodiment proposed in the present invention,
For example, the piston 44 is constituted by a valve body 66, and this valve
The barrel has first and second plurality of flow paths 68,70. Flow
The paths 68 and 70 are the upper surface 72 of the valve body 66 and the lower surface of the valve body 66.
74. Each flow path 68 is controlled by a valve
Upper outflow end 76 and lower inflow end with a counterbore escape groove
It comprises a part 78. Similarly, each flow path 70 is a valve
Controlled lower outflow end 80 and counterbore relief grooved upper flow
It is constituted by an entrance end 82. The flow of the brake fluid between the upper and lower portions of the working chamber 42
Two valve discs 84 and 86 are provided as means for controlling
Have been. The valve discs 84 and 86 are central axes, respectively.
Are arranged adjacent to the upper surface 72 and the lower surface 74 of the valve body 66.
Is placed. The diameter of the valve disc 84 is the outflow end of the flow passage 68
76 is large enough to cover the
It is prevented from flowing in from the outlet end portion 76. One-way valve disc
Numeral 84 denotes an inflow end 82 of the passage 70 with a counterbore escape groove.
No, the brake fluid flows in from the inflow end 82 with counterbore escape groove
it can. The valve disc 84 also has a recess on the upper surface 72 of the valve body 66.
The first pressure chamber 90 is formed in combination with the portion 88.
Similarly, the diameter of the valve disc 86 is the same as the outlet end 8 of the passage 70.
0 covers, while the counterbore escape groove inflow end 78 is not covered
Made to size. Further, the valve disc 86 is
In combination with the second concave portion 92 on the lower surface 74, the second
Pressure chamber 94 is formed. The valve body 66 is held in the pressure cylinder 40.
The valve body 66 has a central hole 96 for
Stone struts 98 can be received. Piston support
The upper part 100 of the pillar 98 has a female threaded center hole 102
There is a lower part of the male threaded piston shaft 46
104 is screwed. Two radially extending channels 1
05 are arranged on the piston strut 98 and these
Radially extends from the power chamber 94 toward the center hole 96 of the valve body 66.
Communicating with the two flow paths 106. Channel 105, 1
06 is a state in which the brake fluid flows between the pressure chamber 94 and a solenoid described later.
Making it possible to flow. Piston support 96
Radially outwardly, and the outer diameter is larger than the diameter of the central hole 96.
Step 107 having a shape is included. Step 107 is a valve
Since it is arranged above the body 66, the step 107
Limiting the upward movement of the torso 66 relative to the piston post 98
I have. In addition, the piston lock nut 108 has a female thread
With a drilled hole 109,
The lower part 110 is screwed below the valve body 66.
The outer diameter of the piston stop nut 108 is the center hole 9 of the valve body 66.
6 is larger than the diameter of the nut 6, the nut 108
Prevents the stilt strut 98 from moving downwards.
You. The piston support 98 and the piston lock nut 108
Further, it serves to fix the most central portions of the valve discs 84 and 86.
doing. In this regard, the center of the valve disc 84 is
Radially expanding step 107 of ton strut 98 and valve body 6
6 and the upper surface 72. Furthermore, valve circle
The center of the plate 86 is the lower surface 74 of the valve body 66 and the piston stop.
It is sandwiched between nuts 108. The valve discs 84, 86 are connected to the surface 72 of the valve body 66,
A pair of coaxial series arrangements to hold down against 74
Provided spiral coil springs 112 and 114
I have. The spring 112 is coaxial with the
Radially spreading step 1 formed on ton support 98
16 and coaxially disposed adjacent to the upper surface of the valve disc 84
It is inserted between the intermediate holding plate 118. Intermediate holding plate
118 allows the spring 112 to be elastic and bendable
The valve disc 84 is pressed against the upper surface 72 of the valve body 66.
You. Similarly, the spring 114 is connected to the piston lock nut 108
Flange 120 radiating upward and next to valve disc 86
Between the intermediate holding plate 122 and the
Has been entered. Therefore, the spring 114 moves the intermediate holding plate 122
The valve disk 86 is resiliently and bendable through the valve body 6.
6 against the lower surface 74. According to the principles of the present invention, the piston 44 is
And the operation of the valve discs 84 and 86.
To form an electrically controllable flow control device
I have. The solenoid 124 has a housing 126, which
Coaxially disposed in a central hole 128 of the piston post 98
ing. Enclosure 126 was expanded with coil 130
An armature 132 having a counterbore 134 is arranged.
You. Armature 132 sits axially upward with respect to valve body 66
The spiral coil spring 136 placed in the
Is pressed. The upper end of the spring 136 is counterbore 1
34 is pressed against the annular surface 138 in the
The lower end of 36 presses on the upper side of the sealing plate 140.
An O-ring or equivalent sealing member 142 is
Between the armature 132 and the brake fluid
Is prevented. The tubular ring 144 is the coil 13
0 and the sealing plate 140 and the coil 130 and the sealing plate
The distance from 140 is kept constant. The solenoid 124 also includes an annular ring of ferromagnetic material.
Armature 1 adjacent to the coil 130
32 and the housing 126. Cyclic phosphorus
146 completes the magnetic flux generated by coil 130.
To ensure proper operation of solenoid 124
ing. Further, the solenoid 124 has an annular container lid 148.
And disposed horizontally in the upper portion 150 in the enclosure 126.
Have been. The container lid 148 has a channel 152 in the center,
Through this, the brake fluid in the housing 126 is
Flows on one surface of the sa. Piston solenoid 124
Solenoi threaded to secure in post 98
A stopper plug 153 is provided. Solenoid stop
The plug 153 has a female thread at the lower part 110 of the piston support 98.
It is screwed into the cut part. Plug 153 is axial
Has a central hole 154 extending therethrough, through which the brake fluid
It flows between the sealing plate 140 and the lower part of the working chamber 42. The solenoid 124 cooperates with the sealing plate 140
The central channel 155 and the multiple
Control the flow of brake fluid between the number of radial channels 156.
You. When the solenoid 124 is in the non-excited state, the brake fluid is at the center.
Through the flow path 155 and the radially arranged flow path 156
Can flow. Armature when solenoid 124 is energized
132 moves downward against the force of the spring 136 to form a sealing plate.
Combined with 140, it is in the closed position. This state
Then, the armature 132 causes the liquid between the flow paths 155 and 156 to flow.
Prevent flow. O-ring or equivalent sealing member 158
Is provided on the armature 132, which is a solenoid
When 124 is excited, armature 132 and sealing plate 140
To prevent the flow of brake fluid during A reverse bias is applied to the valve discs 84 and 86.
Valve to allow liquid to pass through channels 155 and 156
Body 66 further has channels 160 and 162. Channel 1
60 extends axially from pressure chamber 90 to pressure chamber 94, while
The channel 162 extends radially from the channel 70 to the pressure chamber 94.
I have. The brake fluid in the pressure chamber 94 is radiated on the sealing plate 140.
The flow path 106 in the valve body 66 and the flow path 156
It can flow through the channel 105 in the ston strut 98
So that two flow paths are formed in the valve body 66
become. The first flow path makes the brake fluid from the upper part of the working chamber 42.
It flows to the lower part of the moving chamber 42. In this regard, the first
The flow path supplies the brake fluid in the upper part of the working chamber 42 from the vertical flow path 70.
The gas flows into the pressure chamber 94 via the flow path 162. Therefore, the pressure chamber 9
The brake fluid in 4 is a flow arranged radially on the sealing plate 140.
The passage 105 in the piston post 98 and the valve body 66
Flow through the internal flow path 106. Solenoid 124
Pass through the radially arranged flow passages 156 if
The brake fluid flowing through the sealing plate 1
40 and the solenoid stop plug 153
It may flow through central hole 154. In the second flow path, the brake fluid flows between the lower part of the working chamber 42 and
It allows flow to and from the pressure chamber 90. About this point
In the second flow path, the brake fluid in the lower part of the working chamber 42 is softened.
Sealing plate passing through central hole 154 of solenoid stop plug 153
140 to the central channel 155.
If the solenoid 124 is not energized, the center hole 15
4 flows radially on the sealing plate 140.
Flow path 156, flow path 105 in piston post 98
And the pressure chamber 94 via the flow passage 106 in the valve body 66.
Can flow to Next, the brake fluid flows from the pressure chamber 94 to the pressure chamber 90.
It may flow through the channel 160. The leakage of the brake fluid in the pressure chamber 90 is prevented.
An annular stop seal 164 is provided for this purpose. Annular stop
A seal 164 is located within the pressure chamber 90 adjacent to the valve disk 84.
The brake fluid in the pressure chamber 90 is located above the working chamber 42.
Prevents entering the department. The annular retaining ring 168
Positioned adjacent to the annular stop seal 164 in the pressure chamber 90
The seal 164 is deformed, and the pressure chamber 90 and the working chamber 4 are deformed.
2 prevents leakage of liquid between the upper part. same
In this way, the annular stop seal 170 is
It is arranged adjacent to the disk 86. Annular stop sea
The brake fluid in the pressure chamber 94 is located at the lower part of the working chamber 42.
Used to prevent intrusion. Ring
Retaining ring 172 also has annular retaining seal 1 in pressure chamber 94.
64, and the seal 170 is deformed.
Liquid leakage between the pressure chamber 94 and the lower part of the working chamber 42 may occur.
And has prevented. The operation of the shock absorber 20 according to the present invention is the sixth.
The position of the armature 132 is shown in FIG.
Whether the shock absorber 20 is compressing or repelling,
And depending on whether you want a hard or soft stroke
Is determined. When a soft compression stroke is required, as shown in FIG.
The solenoid 124 remains unenergized,
The brake fluid at the lower part of the working chamber 42 is a solenoid stop plug 153.
Central hole 154 and channels 155 and 156 of sealing plate 140
To flow passage 105 in piston post 98 through
Can be. Next, the brake fluid is applied to the flow path 10 in the piston support 98.
5 to the pressure chamber 90, the flow path 106 in the valve body 66
Can flow through force chamber 94 and channel 160
You. The flow of the brake fluid into the pressure chamber 90 depends on the pressure in the pressure chamber 90.
Is higher than the pressure in the upper part of the working chamber 42,
A pressure difference occurs on the surface. This pressure difference is reversed by the valve disc 84.
The brake fluid and allow more brake fluid to flow than is normally allowed.
The road 68 can be passed. A large amount of brake fluid
8 so that the soft compression stroke
realizable. If a rigid compression stroke is required, use a solenoid
124 is energized as shown in FIG.
The brake fluid is distributed radially from the central channel 155 to the sealing plate 140.
It is prevented from flowing to the placed flow channel 156. Working chamber
The lower portion of the brake fluid flows into the pressure chamber 90 in this manner.
Is prevented, the pressure inside the pressure chamber 90 becomes
2 It becomes almost equal to the pressure at the top. Brake fluid in pressure chamber 90
Is not generated on both sides of the valve disc 84,
The reverse biasing force acting on plate 84 flows through channel 68
Except for what is created by the brake fluid, it is gone. Follow
The valve disc 84 is controlled so that a small amount of liquid flows through the flow path 68
A rigid compression stroke is realized. When it is necessary to issue the rigidity, the solenoid 1
Reference numeral 24 denotes a non-excited state as shown in FIG.
Biases armature 132 to the raised position
You. Flow paths 70 and 16 in the valve body 66 from the upper part of the working chamber 42
The brake fluid flowing into the pressure chamber 94 through 2 is a piston support.
98 through the passage 105 in the valve body 66
Flow into the flow passage 156 radially arranged on the sealing plate 140
Can be Since the armature 132 is biased upward,
The brake fluid flowing into the radially arranged flow path 156 operates.
The central channel 155 in the sealing plate 140 is
Flow through the central hole 154 of the solenoid stop plug 153
Can be Therefore, the pressure in the pressure chamber 94 is
Since the pressure is almost equal to the pressure, the
There is no pressure difference between the two sides of the valve disc 86. Thus the valve disc
The reverse bias force acting on 86 is applied to the brake fluid passing through the flow path 70.
That's just what happens. Reverse acting on valve disc 86
Bias force occurs when solenoid 124 is excited
The flow of the liquid through the flow path 70 is restricted.
As a result, a rebound issue is generated. Issuance process
Is required, the solenoid 124 is connected as shown in FIG.
Excited, central flow path 155 and radially arranged flow path 1
Restrict the flow of brake fluid between 56. Therefore, the pressure chamber 94
Inflow from the upper part of the working chamber 42 through the flow paths 70 and 162
The brake fluid stays in the pressure chamber 94. Therefore, in the pressure chamber 94
Is higher than the pressure in the lower part of the working chamber 42. Valve disc
A pressure differential is created on both sides of the 86, resulting in a valve circle
The reverse bias force acting on the plate 86 causes a larger amount of brake fluid
It works in the direction of flow through the flow channel 70, and thus is
Is generated. According to the principle of the present invention, the shock absorber 20
Further, a pressure sensor 180 is provided, and the upper and lower portions of the working chamber 42 are provided.
Used as a tool to measure the pressure difference between the brake fluid contained in
Can be The pressure sensor 180 has a
Inside the central hole 128 of the ston rod 46 and the piston post 98
Between the step portion 184 formed to protrude
Is mounted on the annular member 182 which is disposed
You. The annular member 182 has a shaft and a shaft 186 extending radially.
And a flow path 188 in the direction of the annular member 182.
It penetrates one side. The radially extending flow path 186 is axial
At the center of the flow path 188 and the flow path 186 extending radially.
I'm in contact. The outer part of the radially extending channel 186
In communication with a channel 190 formed on the piston post 98
I have. The pressure sensor 180 covers the axial flow path 188
The brake fluid above the working chamber 42 is
Channels 190 and 186 are provided on first surface 192 of sensor 180.
Can flow through. Further, the brake fluid at the lower part of the working chamber 42 is
Central hole 154 of solenoid stop plug 153, sealing plate 14
0, the central passage 155, the counterbore 134 of the armature 132
And through the flow path 152 in the enclosure cap 148,
The second surface 194 of the sensor 180 may flow. The structure described above
Thanks to the first and second surfaces 192 of the pressure sensor 180
And 194 are the brake fluid in the first and second portions of the working chamber 42.
Is in contact with the liquid. Therefore, the pressure sensor 180
A signal indicating the differential pressure of the brake fluid in the upper and lower portions of the working chamber 42
Can be generated. A device for measuring the movement of the body of the automobile 22;
And an accelerometer 196, which is
It is arranged on the material 182. Accelerometer 196 is annular
Since the accelerometer 196 is fixed to the member 182,
It moves with the ston bar 46, and thus with the body of the car 22.
Can be Therefore, the accelerometer 196
Can generate electrical signals corresponding to the vertical acceleration of the vehicle
You. Performing numerical integration of the output from accelerometer 196
The vertical velocity of the body of the automobile 22 is also obtained by
It is. From the pressure sensor 180 and the accelerometer 196
The electric power for exciting the solenoid 124 according to the output
Shock absorber 20 as a device for generating a dynamic control signal
Also has a signal processing circuit, which is generally number 19
8 and is disposed within the piston post 98. No.
One of the plurality of conductors 200 extends through the annular member 182.
And a signal processing circuit 198, a pressure sensor 180, and an acceleration.
196 in total. As shown in FIG.
The signal processing circuit 198 is generally designated by the numeral 202.
Pressure sensor 180 and acceleration before sending to a remote computer
The output from the meter 196 is amplified. Computer 202
According to the electric signal output from the signal processing circuit 198
Also one of several stored programs described below
It is therefore used to generate the A and B outputs.
The computer 202 operates according to whether the compression process is soft or rigid.
A high or low A output is generated. Computer as well
202 indicates that the counter is electrically high or low depending on the flexibility or rigidity.
A low B output is generated. From computer 202
A and B outputs of the solenoid drive indicated by reference numeral 204
It is supplied to the solenoid 124 through the circuit. Solenoi
Drive circuit 204 is the same as the output from computer 202.
The output from the signal processing circuit 198 is connected to the solenoid 124 as described above.
To convert to voltage levels used to excite
Used for The second plurality of conductors 206 is a computer
The output of the signal 202 and the signal from the signal processing circuit 198 are
Supply to the solenoid drive circuit 204 through the linear member 182
Used to As shown in FIG. 11, the driving circuit 204
A comparator 208, which is provided by the signal processing circuit 198;
An output signal and an adjustable voltage source represented by a variable resistor 210
And the signal from. From the signal processing circuit 198
The signal supplied to the drive circuit 204 at the output of the
Is a voltage proportional to the pressure difference between the upper part and the lower part. Working chamber
42 Lower pressure is higher than upper pressure
(Ie, the repulsion process), the signal processing circuit 198
Output voltage is the voltage given from the variable resistor 210
Exceed. When this condition occurs, a logic high output is applied to comparator 2
08 output. The lower pressure of the working chamber 42 is
42 Compared with signal processing circuit 198 if lower than upper pressure
The voltage supplied to the resistor 208 is given from the variable resistor 210.
Below the voltage that can be applied. In this case, the logic low voltage is compared
Output from the detector 208. The power supplied to various logic gates described later
In order to make the pressures equal, the output of comparator 208 is a resistor.
Inverter 214 through resistor 212 and resistor 216
And connected to the ground potential. Resistors 212 and 216
Indicates that the voltage supplied to the inverter 214 is
Signals equivalent to those of the other components in the drive circuit 204 described below.
It works to be within the range that can be output. Comparator
The output of 208 is also connected to capacitor 218
This is because relatively high frequency noise occurs at the output of comparator 208.
It serves as a filter to prevent the Inverter 2
The output of 14 is NOR gate 220 and AND gate 22
2 are connected. NOR gate 220 and AND gate
Port 222 also has an A output from computer 202 and a B output.
Inputting output. A output and B output are also XO
A output and XOR gate also supplied to R gate 224
The output from 224 is provided to AND gate 226.
The outputs from gates 220, 222 and 226 are OR gates.
Connected to the OR gate 228
The output follows the table below. [Table 1] Here, P indicates that the solenoid 124 has a pressure sensor.
The output from the support 180 is positive (that is, the piston 44
(During firing). [0037] [Outside 1] Indicates that the output from the pressure sensor 180 is not
Excited when positive (ie piston 44 is compressing)
Indicates that 1 is when the solenoid 124 is compressed and rebounded.
Indicates that both are excited. 0 indicates that the solenoid is inactive during both compression and rebound.
This indicates that the excitation is performed. Therefore, the A output from the computer 202 and the
Drive circuit 2 when both B and B outputs are low
04 is the output of the solenoid 124 from the pressure sensor 180
Control to respond directly to. Similarly, A output and B output
When both forces are high, the drive circuit 204 is a solenoid
So that 124 follows the inverted output from pressure sensor 180
Control. If only the B output is high, the driving circuit 20
4 excites solenoid 124 while only A output is high
The solenoid 124 is not energized.
You. The output from the OR gate 228 is a drive controller.
230 input pin 1. The drive controller 230
NPN Dali for external power to drive solenoid 124
Control the base current supplied to the transistor 234.
Used to control. The drive controller 230 is initially
When a sufficiently large current flows through the transistor 234, the armature 132
Is pressed against the sealing plate 140. Armature 132 is sealing plate 1
Upon hitting 40, the drive controller 230 switches to the solenoid 124
To the armature 132 at the position of the sealing plate 140
Decrease to the value you want to keep. Drive controller 230
Power pin 7 of controller 230 is powered by a nominal 5 volt power supply.
Bus (V_cc)It is connected to the. Timer of controller 230
Pin 8 is also connected to V through resistor 236_ccAgain to the power bus
The capacitor 238 is connected to the ground potential. Usually
The values of the arrestor 236 and the capacitor 238 are determined by the solenoid 12
4 is driven first and then the current flowing through the solenoid 124 is
Determine the time to reduce flow. The output pin 2 of the controller 230 is a transistor
234 and one of the substrates of the capacitor 240.
Has been continued. The second substrate of the capacitor 240 is a controller
230 connected to COMP pin 3 of capacitor
40 stabilizes the circuit while the solenoid 124 is energized
ing. The SENSE input pin 4 of the controller 230 is connected to the resistor 2
42, the emitter of transistor 234 and a resistor
244 is connected to the ground potential. Resistor 2
Reference numerals 42 and 244 indicate that the solenoid 124 maintains the excited state.
It is responsible for building the minimum current needed to Da
Ide 246 is also the emitter of transistor 234,
The transistor 234 is connected to the ground potential.
Is the forward bias voltage of the diode 246.
Pressure (about 0.7 volts). Seo
When the current to the solenoid 124 is reduced, the transistor
To prevent 234 from inducing kickback,
An iodine 248 is provided. Zener diode
248 indicates that the voltage applied to the diode is
8 when the breakdown voltage (about 35 volts) is exceeded
The current from 124 flows. Therefore, the diode 248
The voltage supplied to the collector of the transistor 234 is 35
Inductive kick added to transistor 234
The impact of the back is reduced. From accelerometer 196 and pressure sensor 180
The supplied information is obtained by using the method shown in FIG.
Used for braking. The initial state is the compression stroke
And the anti-issuing process and the anti-issuing process are shown in step 250 in the figure.
So that the solenoid 124 is in the compression stroke.
It is in non-excited state and is in excited state during the counter-issuing process.
doing. From the accelerometer 196 at step 252
Is read by the computer 202 and the output of the
At 4, the acceleration value is added to the previous acceleration value, and the vertical
Direction speed (V_body) Is obtained. Step 256
Computer 202 was obtained from accelerometer 196
The magnitude of the speed is a predetermined value (V_o),this
Is usually a value of 0.05 m / s.
Make a decision. Vertical speed (V_body) Is predetermined
Determined value V_oIn the following cases, step 258 is shown.
As shown, the solenoid 124 maintains the non-excited state during compression
Then, it is in an excited state during the repulsion. If car 22
The magnitude of the vertical velocity of the body is a predetermined value
V_OIf so, the computer 202
In the step 260, the body of the automobile 22 is
Determine whether it is moving toward or downward. S
As shown in step 262, the vertical velocity (V_body) Is positive
, Indicating upward movement, the solenoid 124
During both the contraction and rebound strokes, the magnet is de-energized and
Achieve an issuance process and a soft compression process. If the vertical speed (V
_body) Is negative, the computer 202 proceeds to step 26.
As shown in FIG. 4, when the solenoid 124 is compressed and rebounded,
Excitation. Soleno according to steps 250-264
When the response of the id 124 is determined, the process proceeds to step 26.
6 or other initial steps in another way.
Return to step 250. By using this method,
The shock absorber 20 has a vertical motion cycle of the body of the automobile 22.
The maximum braking force is generated when it is approximately equal to 1.5 Hz. Due to the natural frequencies of the wheels 28 and 36
In order to minimize the body vibration of the
The computer 202 operates the solenoid 124 by the method shown in FIG.
Used to control. The upper and lower portions of the working chamber 42
Is first read in step 268.
In step 270, a subsequent pressure measurement determines the wheel
At a time interval approximately equal to the frequency (usually 10-15 Hz)
Done. The pressure difference value is then reduced in step 272.
A according to the above equation^TwoUsed to determine the value of (Equation 1) Where P_tIs the working chamber 42 at time t
Shows the differential pressure between the upper and lower part of the. T is the natural frequency of the wheel of the automobile 22
Shows the selected period (usually 10-15 Hz). In step 274, A^TwoIs A_O
^TwoThis value is compared to the value of
When the piston speed exceeds 0.4 m / s
It shows a value for setting the shock absorber in a rigid state. Most understand
A_o ^TwoOptimizes specific riding comfort characteristics
You can also choose to do so. A^TwoIs A_o ^Twoof
If it is greater than the value, the solenoid
Id 124 is energized during compression to achieve a rigid compression stroke.
On the other hand, during the rebound, the non-excited state is maintained and the
Has been realized. A^TwoIs A_o ^TwoLess than or equal to
In this case, the operation of the solenoid 124 changes its initial state.
Hold without. Next, the process proceeds to step 268.
Return via the initial step of 278 or other method
You. By using this method, the shock absorber 20
The frequency of the vertical motion of the wheels of the automobile 22 is 10 to 15 Hz.
Maximum braking can be performed when approximately equal to the value. When the piston 44 and the piston rod 46
To prevent excessive axial movement during rebound
The method shown in FIG. 14 is used. Step 28
At 0, the pressure difference between the upper and lower parts of the working chamber 42 is recorded.
Is recorded. In step 282, the value of the differential pressure is measured.
The computer 202 causes the shock absorber 20 to
Determine if you are shrinking or repelling. Step 284
The shock absorber 20 is being compressed and the solenoid 12
4 is excited to realize the rigid compression stroke,
Via the initial steps of Step 286 or other methods
And return to step 280. If the compression stroke is
Stone speed V_PISTONIn step 288
The pressure difference recorded by the sensor 180 to the computer 202
Compare with the stored pressure / piston speed conversion table
Can be Piston speed V_pistonIs the absolute value of
A predetermined value V as shown in 90_o(Tour 0.4
m / s), the solenoid 124 is non-excited.
In step 292, a rigid compression stroke is realized.
Processing then proceeds to step 286 or other initial steps of the method.
After that, the process returns to step 280. Piston speed V
_pistonIs the predetermined value V_oSmaller than
If not, the process may begin at step 286 or another method.
After the initial step, the process returns to step 280. If the shock absorber 20 is
When the computer 202 is determined to be in the repulsion state, the computer 202
As shown in step 294, the solenoid 124
Judge whether it is about to be issued. Anti-issuance is rigid
And processing may be the initial steps of step 286 or other methods.
Then, the process returns to step 280. Anti-issue is flexible
And the piston speed V_pistonIn step 296
The pressure difference between the upper and lower parts of the working chamber 42 is calculated by a computer.
Compare with the pressure / piston speed conversion table stored in 202
Required. The piston speed as shown in step 298
Degree V_pistonIs a predetermined value V_oThan
Is larger, the computer 202 proceeds to step 300.
Magnetizes the solenoid 124 in the non-excited state and
Manifest. If piston speed V_pistonThe size of
Predetermined value V_oIf it is smaller than
Via step 286 or other initial steps of the method
Return to step 280. By using this method
The shock absorber 20 absorbs the vertical movement of the wheels of the automobile 22 to absorb the shock.
Maximum braking in case of over-compression or over-extension of the collector 20
realizable. A second embodiment of the present invention is shown in FIG.
ing. In this embodiment, the valve body 302 has a recess 306.
Upper surface 304 with recesses and lower table with recesses 310
And a surface 308. Between the upper and lower parts of the working chamber 42
The valve body 302 further includes a first and a second
It has two vertical channels 312 and 314. Channel 3
12 and 314 are the upper surface 304 of the valve body 302 and the valve body 3
02 through the lower surface 308. Each channel 3
12 is the valve controlled outlet section 316 and opposes it
And a counterbore-escape grooved inlet portion 318. same
Similarly, each flow path 314 has an outlet section 320 controlled by a valve and its
And a counterbore relief grooved inlet portion 322 opposed thereto.
Have been. The flow of the brake fluid between the upper and lower working chambers 42
Two valve discs 324 and 326 are provided as control means.
Is provided. Valve discs 324 and 326 are aligned
The upper surface 304 and the lower surface 308 of the valve body 302 respectively.
And are arranged adjacent to each other. The diameter of the valve disc 324 is the flow path
312 is large enough to cover the outflow end 316 of 312
This causes the brake fluid to flow in from the outflow end 316
Is prevented from doing so. On the other hand, the valve disc 324 is
The inflow end 322 with the counterbore escape groove is not covered,
The liquid can flow in from the counterbore escape grooved inflow end 322. valve
Disc 324 also has a recess on upper surface 304 of valve body 302.
Combined to form a first pressure chamber 328. Same
The diameter of the valve disc 326 is equal to the outflow end 320 of the flow path 314.
Is large and does not cover the inflow end 322 with the counterbore escape groove.
Made to size. Further, the valve disc 326 is attached to the valve body 302.
With the second recess 310 on the lower surface 308 of the
Thus, a second pressure chamber 330 is formed. The valve body 302 is held in the pressure cylinder 40.
The valve body 302 has a central hole 332 for axial extension.
The piston strut 334 can be received. Pi
Stone post 334 has a female threaded center hole inside
Male threaded pistol with a raised top (not shown)
The lower part of the shaft 46 is screwed. O-ring or equivalent
Of the valve body 302, the piston support 334,
To prevent the brake fluid from flowing between them.
Stopped. Two radially extending channels 340 are fixed
Are disposed on the support columns 334, and these are
Extends radially from the valve body 302 toward the center hole 332 of the valve body 302.
And two flow paths 340. More piston support
The post 334 also has two radially extending channels 346.
This extends from the pressure chamber 330 to the center hole 332 of the valve body 302.
To two radially extending channels 348. Flow
Channels 340-348 are filled with brake fluid in pressure chambers 328 and 330 and
So that it can flow between one of the solenoids described below.
You. The piston strut 334 extends further radially,
Step 34 having an outer diameter greater than the diameter of hole 332
9 is included. Step 349 is at the top of valve body 302
In step 349, the valve body 302
Restricting movement above the stone column 334
You. Furthermore, the piston lock nut 350 is threaded
With a hole 352
The lower part 354 and the lower part of the valve body 302 are screwed.
The outer diameter of the piston lock nut 350 is the center hole of the valve body 302
332, the nut 350 has a valve body 302
Prevent the piston post 334 from moving downwards
I have. Piston post 334 and piston lock nut 350
Also serves to fix the center of the valve discs 324 and 326.
I'm doing it. In this regard, the most central part of the valve disc 324
Is the radially extending step 349 of the piston post 334
And the upper surface 304 of the valve body 302.
Further, the center of the valve disk 326 is located on the lower surface 3 of the valve body 302.
08 and the piston lock nut 350. The valve discs 324 and 326 are arranged in the table of the valve body 302.
A pair of same to press against surfaces 304 and 308
Spiral coil springs 356 and 358 arranged in series on a shaft
Is provided. The spring 356 and the piston support 334
Coaxially, radially formed on piston post 334
Spreading step 360 and adjacent to the top surface of valve disc 324
It is inserted between the intermediate holding plate 362 arranged coaxially and
ing. The spring 356 is elastic via the intermediate holding plate 362.
The valve disc 324 over the valve body 302 so that it can be bent
It is pressed against the surface 304. Similarly, the spring 358 is fixed
Flange 364 radiating radially over locking nut 350
And an intermediate pusher disposed coaxially adjacent to the valve disc 326.
It is inserted between the base plate 366. Therefore, the spring 358
Is elastically and bendable by the intermediate holding plate 366.
And press the valve disc 326 against the surface 308 of the valve body 302
I have. Controlling the operation of the valve disks 324 and 326;
Pis to configure an electrically controllable flow control device
Ton 44 further includes first and second solenoids 370 and
372. Solenoid 370 has enclosure 374
This is located in the central hole 375 of the piston post 334.
Have been. The coil 376 is expanded in the housing 374.
Armature 378 having a counterbore 380
I have. The armature 378 moves upward along the axis with respect to the valve body 302.
The spiral coil spring 382 placed in the counterbore 380
Therefore it is pressed. The lower end of the spring 382 is counterbore
The spring 382 is pressed against the bottom of the hole 380.
Is pressed to the lower side of the sealing plate 384. same
Similarly, the solenoid 372 also has a containment 386, which
Solenoid 370 in central hole 338 of stone post 334
It is arranged below. The coil 3 is contained in the housing 386.
Armature 390 with counterbore hole 392 extended and 88
And are arranged. Armature 390 is attached to valve body 302
Spiral carp placed in counterbore 392 upward along the axis
It is pressed by the spring 394. Spring 394
Is pressed against the upper surface of counterbore 392
And the lower end of the spring 394 is on the upper surface of the sealing plate 396.
It is imposed. Axial direction of counterbore hole 380 of solenoid 370
There is an axial flow path 398 at the lower end of the
374 are arranged coaxially with the flow path 400. Likewise
At the upper end in the axial direction of the counterbore hole 392 of the
02, which is the same as the flow path 404 in the enclosure 386.
They are arranged axially. The pressure sensor 406 is
4 and 386 adjacent to flow paths 400 and 404.
The pressure sensor 406 is connected to the solenoid 37
The pressure between the brake fluid in zero and the brake fluid in solenoid 372
Force difference can be measured. The output from the pressure sensor 406 and the
Both outputs from the speedometer 408 are supplied to the signal processing circuit 198.
Before sending them to the computer 202.
Amplify the output. Next, the computer 202
And 372 for controlling the terminals 370 and 372.
The air control signal is issued via the solenoid drive circuit 204.
Live. The solenoid 370 cooperates with the sealing plate 384.
The central channel 410 and the multiple
Control the flow of brake fluid between the number of radial channels 412.
You. When the solenoid 370 is closed, the armature 3
Numeral 78 moves downward against the force of the spring 382 to
4 and the closed position. In this state, the armature 3
78 prevents the flow of brake fluid between channels 410 and 412
I do. Similarly, solenoid 372 cooperates with sealing plate 396
To be arranged on the central channel 414 and the sealing plate 396.
Control the flow of brake fluid between the number of radial channels 416.
You. When the solenoid 372 is open, the brake fluid is
4 and flow channels 416 arranged radially.
When solenoid 372 is closed, armature 390 is spring 394
Moves downward against the force of
Becomes In this state, the armature 390 is connected to the flow path 414.
416 is prevented. The solenoid 370 is connected to the upper part of the working chamber 42 and the shaft.
Directional flow path 422 and radial flow path 4 in piston post 334
24. The axial flow path 422 is a sealing plate
384 extend from the central flow path 410
We are in contact at its center. In addition, the solenoid 372
Lower part of working chamber 42 and center of solenoid stop plug 428
Communication is through a hole 426. Solenoid stop plug
428 is male threaded and below piston post 334
Part is screwed. The reverse bias is applied to the valve disks 324 and 326.
Valve body 3 for flushing fluid through flow passages 410-418.
02 further has channels 430 and 432. Channel 43
0 is radial from the pressure chamber 328 to the vertical flow path 312
On the other hand, the channel 432 extends from the pressure chamber 330 to the channel 314 while extending.
It is extending towards. Therefore, the brake fluid in the flow path 312 is
430 into the pressure chamber 328,
Brake fluid flows into the pressure chamber 330 through the flow path 432
it can. According to the present invention, two streams are provided in the valve body 302.
It will be appreciated that a path has been formed. The first channel is flow
The brake fluid that has entered the passage 312 flows into the upper part of the working chamber 42. This
More specifically, the first flow path is a vertical flow path 31.
2 flows into the pressure chamber 328 through the flow path 430.
To enter. Next, the brake fluid in the pressure chamber 328
A flow valve is provided in the radially arranged flow path 412 of the sealing plate 384.
The flow in the flow path 342 in the body 302 and the flow in the piston support 334
It flows through road 340. If the solenoid 370 is open
If any, the brake fluid in the radially arranged flow path 412
Are the second central flow path 410, the axial flow path 422 and the radiation direction.
It flows to the upper part of the working chamber 42 through the counter flow path 424. The second flow path forms the brake fluid in the vertical flow path 314.
It flows to the lower part of the moving chamber 42. Elaborate on this point
And the second flow path passes the brake fluid in the flow path 314 through the flow path 432.
To flow into the pressure chamber 330. Therefore, the pressure chamber 330
The brake fluid in the inside is directed to the radial passage 416 in the sealing plate 396.
The radial passage 346 in the valve body 302 and the piston strut
Flow through a radial channel 348 in
it can. If solenoid 372 is open, closed
The brake fluid reaching the radial flow path 416 of the plate 396 is
Through the flow path 314, the central flow path of the solenoid sealing plate 396
It may flow through 414 to the lower portion of the working chamber 42. It is possible to prevent the brake fluid from leaking in the pressure chamber 328.
An annular stop seal 434 is provided for this purpose. Ring
Stop seal 434 is adjacent to valve disk 324 in pressure chamber 328
The brake fluid in the pressure chamber 328 is disposed in contact with the working chamber.
42 is prevented from flowing into the upper part. Annular stopper phosphorus
436 is also located in the pressure chamber 328 and
34 is deformed between the pressure chamber 328 and the upper part of the working chamber 42.
Liquid leakage itself is prevented. In the same way,
In the pressure chamber 330 adjacent to the valve disc 326
Are located. The annular stop seal 438 is connected to the pressure chamber 330.
To prevent the brake fluid from entering the lower part of the working chamber 42.
You. Annular retaining ring 440 is also located within pressure chamber 330
And the seal 438 is deformed to work with the pressure chamber 330.
Prevent leakage of brake fluid between the lower part of the moving chamber 42 and
ing. When a large amount of fluid flows through the flow path 314,
Corresponding to the counter-issue, the solenoid 372 is closed and fluid is
Between the central flow path 414 and the radial flow path 416 of the sealing plate 396;
It prevents it from flowing between. Therefore, in the pressure chamber 328
Cannot flow into the lower part of the working chamber 42.
No. Accordingly, the pressure in the pressure chamber 330 increases, and the valve disc 32
6 to increase the reverse bias force applied. Next, the valve disk
326 deviates from the valve body 302 more than usual and
The flow of the brake fluid through the fruit flow path 314 increases. If Go
The solenoid 372 is open when a counter-issue is required.
And the pressure in the pressure chamber 330 is
It is almost equal to force. In this state, the valve disk 326
The reverse bias force applied to is reduced. Therefore a small amount of control
Only the fluid can flow through the flow path 314, and as a result
The issuance process can be realized. If a soft compression stroke is required, a solenoid
370 is closed and the central channel 410 and the sealing plate 384 are closed.
The flow of the brake fluid to and from the radial flow path 412 is prevented.
You. Liquid can flow between channels 410 and 412
Since there is no brake fluid in the pressure chamber 328,
Can not flow into the department. Brake fluid in pressure chamber 328
Is higher than the pressure above the working chamber 42,
The reverse bias force applied to the valve disc 324 increases, and the valve disc 324 is increased.
324 is greatly deflected. The amount of deflection of the valve disk 324
Increase the amount of brake fluid flowing through the flow path 312, and
Thus, a soft compression process can be realized. When a rigid compression stroke is required
, The solenoid 370 is opened and the pressure chamber 328 is closed.
The upper part of the working chamber 42 is communicated. Therefore, the pressure chamber 328
The pressure is almost equal to the pressure in the upper part of the working chamber 42,
The reverse bias force applied to plate 326 is limited. A third embodiment of the present invention is shown in FIG.
Where the first and second annular valve members 442
And 444 are provided. First and second annular valve members 442 and 44
Reference numeral 4 denotes a first pressure chamber 90 and a second pressure chamber 94 coaxially.
It is arranged in. Two annular stop seals 446 and 4
48 between the first annular valve member 442 and the valve body 66
It is arranged to prevent liquid leakage during Likewise
Two annular stop seals 450 and 452 are second annular valve members
Also between the 444 and the valve body 66 to prevent liquid leakage
It is arranged in. The first annular valve member 442 is a first pressure chamber
Opening 45 arranged between 90 and the upper part of the working chamber 42
4 Opening 454 is adjacent to the top of working chamber 42
And has an enlarged diameter portion 456 where a brake fluid filter is provided.
Used to attach. Further to the opening 454
Has a limited diameter portion 458 adjacent to first pressure chamber 90
It is provided. The diameter of the enlarged diameter portion 456 is approximately
1.27 millimeters (0.05 inches), limited
The diameter 458 is approximately 0.33 millimeters (0.4 mm).
013 inches), but use any other suitable diameter
You will understand what you can do. The opening 454 is provided in the present invention.
The same operation as the flow channel 162 described in relation to the first embodiment.
To Further, the second embodiment of the present invention provides a flow path 460.
Which radiates from channel 105 toward channel 160
Extending in the direction. The channel 460 is the first embodiment of the present invention.
Has the same function as the flow path 106 described in relation to During operation, the brake fluid is opened when the solenoid 124 is open.
Flows into the channel 160 through the channel 460 depending on whether
I do. The brake fluid in the channel 160 is then supplied to the first pressure chamber 90.
Which biases the valve disc 72 to provide vertical flow.
The brake fluid flowing through the passage 68 is adjusted. Restriction of opening 454
Since the diameter portion 458 is relatively small, the inside of the first pressure chamber 90
The pressure is maintained at a relatively constant value during compression. At the time of rebound,
The brake fluid from the upper part of the working chamber 42 passes through the opening 454
It enters the first pressure chamber 90. The brake fluid entering the opening 452
From the first pressure chamber 90 to the second pressure chamber 94 through the flow path 160
Can flow. Is solenoid 124 open?
Depending on whether or not the brake fluid flows from the second pressure chamber 94 to the working chamber 42
Channels 460, 105, 155 and 156 at the bottom of
Can flow through the central hole 154,
Thus, the pressure in the second pressure chamber 94 is adjusted. The embodiment shown here satisfies the objects mentioned above.
It is clear that this is enough, but the present invention is within the scope of the invention.
Modification, modification, and alteration easily without departing from
It will also be understood. For example, one computer
To control the braking characteristics of many shock absorbers at the same time
Could be. Control the braking characteristics of the car 20
Could use another program for
And using the proposed programs individually is also collective
Could also be used. In addition, a pressure sensor and
It is possible to place both speedometers in the solenoid enclosure.
Will be able to. In addition, the solenoid can be
Open and close the flow rate by replacing with another device such as a member
It would be possible.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view of a mechanical shock absorbing device made according to an embodiment proposed by the present invention, showing an operating state incorporated in a typical automobile. FIG. 2 is a reduced side elevational view of the mechanical shock absorber shown in FIG. 1 with a part removed. FIG. 3 is an enlarged perspective exploded view of a piston according to the first embodiment of the mechanical shock absorbing device shown in FIG. 2; FIG. 4 is an enlarged perspective exploded view of a piston according to the first embodiment of the mechanical shock absorbing device shown in FIG. 2; FIG. 5 is an enlarged longitudinal sectional view of the piston according to the first embodiment of the present invention shown in FIG. 2; FIG. 6 is an enlarged sectional view of the piston shown in FIG. 5; FIG. 7 is an enlarged sectional view of the piston shown in FIG. 5; FIG. 8 is an enlarged sectional view of the piston shown in FIG. 5; FIG. 9 is an enlarged sectional view of the piston shown in FIG. 5; FIG. 10 is a diagram showing a procedure in which outputs from a pressure sensor and an accelerometer are used to operate a solenoid according to the first embodiment of the present invention shown in FIG. 5; FIG. 11 is a schematic diagram of a driving circuit shown in FIG. FIG. 12 is a flowchart showing a procedure for damping the movement of the vehicle body. FIG. 13 is a flowchart showing a procedure for minimizing non-spring load vibration of a wheel or a vehicle. FIG. 14 is a flowchart showing a procedure for preventing excessive movement of the piston in the axial direction during compression and rebound. FIG. 15 is an enlarged longitudinal sectional view of the mechanical shock absorbing device shown in FIG. 1; FIG. 16 is an enlarged longitudinal sectional view of the mechanical shock absorbing device shown in FIG. 1; [Description of Signs] 40 Pressure cylinder 44 Piston 98 Piston support 124 Solenoid 180 Pressure sensor 196 Accelerometer 198 Signal processing circuit

   ────────────────────────────────────────────────── ─── Continuation of front page    (56) References JP-A-61-249810 (JP, A)                 JP-A-60-151111 (JP, A)                 Special table Sho-61-500957 (JP, A)                 US Patent 4333668 (US, A)                 US Patent 3039566 (US, A)

Claims (1)

(57) [Rules for requesting registration of utility model] In the direct-operated hydraulic shock absorber for damping the body motion of the motor vehicle, a pressure cylinder forming a working chamber for storing the brake fluid has first and second portions, the said pressure cylinder first and and a second part piston disposed in front <br/> Symbol pressure in the cylinder between the piston support member communicating with said piston and mechanical, of the first and second portions of said working chamber Measures pressure difference between brake fluids and detects rebound and compression of the shock absorber
And, wherein said first electrical signal operates to generate in response to the pressure difference between the brake fluid to be stored in the first and second portions, the first sensor disposed in the piston support the member
Means and said measured vehicle body vertical speed of the vehicle, a second sensor means operable to generate a second electrical signal in response to the vertical velocity of the body of the motor vehicle, the first and second Control signal generating means for generating an electric control signal in response to the electric signal;
The control signal indicates whether the shock absorber is in a compressed or repelled state.
Depending on whether the vertical speed of the vehicle body exceeds a predetermined value.
And the first and second control chambers in response to the electric control signal.
Beauty said impact absorbing device which comprises an electric flow control means for regulating the flow of damping fluid between the second portion. 2. 2. The shock absorbing device according to claim 1, wherein the first
The sensor means, in communication with the first surface communicating with the brake fluid that has been stored in said first portion of said working chamber, the brake fluid that has been stored in said second portion of said working chamber Second
Impact absorbing device which comprises a pressure sensor and a surface of the. 3. 2. The shock absorbing device according to claim 1 , wherein the second
Wherein the sensor means comprises an accelerometer. 4. In the shock absorbing device according to claim 1, said electrical flow control means is constituted by a solenoid operated as the solenoid to regulate the flow of damping fluid between said first and second portions of said working chamber A shock absorbing device. 5. 5. The shock absorbing device according to claim 4, wherein the control is performed.
The signal absorbing means includes a signal processing circuit operable to amplify the first and second electric signals. 6. 6. The shock absorbing device according to claim 5, wherein the control is performed.
Signal generating means has said signal processing circuit electrically connected to a computer, the computer impact absorbing device, characterized in that it operates to make the output in response to the signal of the signal processing circuit. 7. 7. The shock absorbing device according to claim 6, wherein the control is performed.
Signal generating means further comprises a solenoid driving circuit, before
The solenoid drive circuit outputs the output of the computer,
A shock absorber operable to convert to the electrical control signal that can be used to excite the solenoid. 8. The shock absorber of claim 7, wherein the solenoid drive circuit is operable to convert an output of the signal processing circuit to the electrical control signal used to excite the solenoid. Absorber.