JPS6085005A - Vehicle level adjusting device - Google Patents

Abstract

PURPOSE:To automatically adjust the level of a vehicle such as, for example, a sport car, to a level suitable for ride-on and -off, by controlling the feed and, discharge and shut-off valves for actuators upon detection of a stop of the engine. CONSTITUTION:A microcomputer 67 receives outputs from a door sensor 75, an I.S. 74, a shift lever sensor 76, a PB sensor 77, vehicle level sensors 78, 79 at wheels, a mode switch SW80 and a vehicle level adjusting SW81. The microcomputer 67 controls the level of the vehicle in accordance with a predetermined program on the basis of the above-mentioned data. Further, when the microcomputer 67 processes signals from the I.S. 74, the door sensor 75 and the PB sensor 77 to judge a stop of the vehicle, a stop of the engine and ride-on and -off, it controls hydraulic oil feed, discharge and shut-off valves 42a through 45a for vehicle level adjusting actuators so that the level of the vehicle is automatically regulated to a level suitable for ride-on and -off.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an Li height adjustment device used in vehicles such as automobiles.

Improper inventions and their problems When driving at high speeds, vehicles such as sports cars where maneuverability is important, the vehicle height is generally set lower than that of a normal sedan. In vehicles such as limousines, where comfort is important, the vehicle height is set 5 times higher than that of a normal sedan.Therefore, in these vehicles, it is difficult to get in and out of the vehicle ( There is a problem with 't's fault.

OBJECT OF THE INVENTION An object of the present invention is to improve the vehicle height when getting out of a vehicle, such as a sports car or limousine, where there is a relatively large difference between the vehicle height suitable for driving and the vehicle height suitable for getting on and off. An object of the present invention is to provide a height adjustment device for a vehicle that is suitable for riding a vehicle and is configured to automatically adjust the height of the vehicle.

Another object of the present invention is to automatically adjust the vehicle height to a height suitable for getting on and off when getting off D1, and to automatically adjust the vehicle height to a height suitable for running the vehicle when the vehicle is running again. An object of the present invention is to provide a height adjustment device for a vehicle.

Structure of the Invention These objects, according to the present invention, are: (1) a hydraulic fluid source, a hydraulic accelerator which increases and decreases the vehicle height by supplying and discharging the hydraulic fluid, and the hydraulic fluid source and the actuator; 3IT circuit means connected in communication;
an on-off valve installed in the middle of the OQ oil passage means between the driving fluid source and the actuator, a drain passage means for discharging the working fluid in the actuator, and the drain passage. a second on-off valve provided in the middle of the means; a control means for controlling opening and closing of the first and second on-off valves; and a first detection stage for detecting whether or not the engine is being operated. , 1i, and a second detection means for detecting the height, and the control means maintains the first and second on-off valves in a closed state when the vehicle height is not adjusted;
When the first detection means detects that the operation of the first engine is started or stopped, the first and second on-off valves are opened in response to the detection, and then the first detection is performed. When it is detected that the inner convex is in the predetermined state 1 or 2, the closed valve is closed in response to the above. an adjustment device, and Q) a working fluid source, and a fluid that increases or decreases the vehicle by supplying and discharging the working fluid; a set of accelerators; the working fluid source and the 1-L eater; A first opening/closing valve provided in the middle of the passage means between the working fluid source and the accumulator, and a passage means for communicating and connecting the working fluid in the accumulator to the an exiting drain passage means, a second on-off valve provided in the middle of the drain passage means, and a control means for controlling opening and closing of the first and second on-off valves; and a second detection means that detects the vehicle height. The valve is maintained in a closed state, and when the first detection means detects that the operation of the engine has stopped, the first and second on-off valves are activated in response. When the vehicle height is detected to be in the predetermined first state, one of the valves is opened, and then the second detection means opens the one valve in response to The opening/closing valve of the J-engine is opened and maintained in that state, and when the first detecting means detects that the J-engine has started operating, the operation is performed. When the second detecting means detects that the vehicle height has reached a predetermined second state, the second detecting means responds to the said first and second on-off valves. This is achieved by a vehicle height adjustment device configured to close the other open/close valve that was opened.

Functions and Effects of Light If such a configuration is used, when the engine is stopped, the first opening/closing valve will be 17i1 valve in the case of a vehicle such as a sports car, and in the case of a vehicle such as a limousine. The vehicle height is automatically increased or decreased by opening the second PI valve, and when the vehicle height reaches a medium height suitable for getting on and off, the LL and first opening/closing valves are set to 111, respectively. By activating the valve, the vehicle is maintained in that state, and the ease of getting in and out of the vehicle is automatically improved. Particularly, according to the latter configuration of the present invention, the ease of getting on and off the vehicle ↑1 is automatically improved.
Since the vehicle height is automatically changed to the second state suitable for running the vehicle when the vehicle runs again instead of J, the running performance of the vehicle is automatically improved.

In the vehicle height adjustment system according to the present invention, the working fluid may be a non-pressure fluid such as oil or a compressible fluid such as breathable air.

DESCRIPTION OF THE EMBODIMENTS FIG. 1 is a schematic diagram showing one embodiment of the vehicular ijji height adjustment neck strap according to the present invention. In the figure, 1 indicates a reserve tank as a working fluid supply source that stores oil as a working fluid, and 2 to 5 indicate the front right wheel and front left wheel of the vehicle, which are not shown in the figure, respectively. , shows actuators installed corresponding to the right rear wheel and the left rear wheel. In particular, in the illustrated embodiment, the actuators 2 to 5 include a cylinder 6 and a piston 7, which are respectively connected to the body of a vehicle and a recovery arm (not shown).
This is a Hyde 02J-matic cylinder consisting of a fluid pressurized tank 12 separated into a liquid chamber 10, a gas chamber 11, etc., communicating with a cylinder chamber 9 defined by a cylinder 6 and a piston 7 by a flamm 8. However, actuator 1. J. A temporary device such as a hydraulic ram device is acceptable, as long as it can increase or decrease the vehicle height by supplying, discharging, and discharging oil.

Reserve tank 1 is conduit 13, ) 1]-dihe-ida 1
/I, J, branched conduits 15 and 16.7 O-conduits 18 and 19, branched by divider 17, conduits 20 and 21, conduit 22, F[1-branched by divider 23 /C conduit 24 and 25 is connected to the cylinder chamber 9 of the rear cylinder 2-5.In the middle of the conduit 13 is an engine (not shown) that is driven by the reserve tank 1. A pump 26 supplies ++ to the actuators 2 to 5, and 1. is discharged from the pump 26. : By returning excess oil to the C-relief tank 1 through the return conduit 27, the maximum flow m of A-oil flowing in the downstream conduit 13 is controlled to a predetermined value V. The control valve 28 is numbered. Pump 26 and flowffi l1ill
Between the conduit 133 between the till valve 28 and the return conduit 27, the maximum force of the oil flowing in the conduit 13 between the relief valve 22G and the flow restriction till+ valve 28 is controlled 31+ in a predetermined manner. It has become so.

Also nv! ! Niha style fft ml III in the middle of 13
A valve 281=-/l]-divider 14 is provided with a valve 30 between the valve 281 and the divider 14. A predetermined amount of oil flowing in the flow-side conduit 13 is diverted to another fluid flow device 32 such as a basso steering device through the conduit 3'l,
The remaining oil is diverted to the conduit 133 on the lid flow side. 1 Sea urchins are turning. Furthermore, this flow 1-bly A Lite f
The valve 30 may be configured to divert a predetermined amount of oil flowing in the conduit 13 upstream thereof to the conduit 13 downstream thereof, and to divert the remaining oil to another fluid pressure device 32. .

Furthermore, in the middle of the conduit 13, there is a first priority relay valve 30.
Pressure control (1 valve 33
and a check valve i34. The pressure control valve 33 detects the pressure of oil in the conduit 13 on the downstream side of the check valve 34, and detects the pressure (1) when the pressure (J) becomes less than or equal to the set upper limit Iff. −
If so, reserve tank 1 upstream of it
I: is connected in communication with the return conduit 35, and when the oil pressure in the downstream pipe 13 drops below the set lower limit value, it responds to The conduit 13 on the side is connected to the conduit 1ζ3 on the downstream side.The check valve 34 controls the flow of oil from the divider 14 to the pressure horn control valve 33. It's starting to look like this.

An accumulator 338 is connected to a connecting portion 336 located between the check valve 34 of the conduit 133 and the flow divider 14 through a conduit 37, and an accumulator 3811 is connected to the conduit 1 by an ear diaphragm 39. It is divided into a body chamber 4o and a gas chamber 41 (11111), and one person is placed in the air IA chamber 41, and the oil introduced into the liquid chamber 40 is added to the compressible fluid such as air. It is designed to be JI and accumulated JE.

Conduit 370) On the way, there is a 7i line between 1 company and 1'A1 valve 42.
is set up. The electric Mi 1ffl closing valve 42 is configured to open a l'jll valve and cut off communication with the -cs pipe 37 every time the solenoid 42a is energized once.

Between the conduit 18 and the conduit 20, between the conduit 21 and the conduit 16, and between the conduit 22 (functioning as a first valve and a second opening/closing valve, respectively). Normally closed electromagnetic switching valve with 9 f functions/13-・
45 are provided. The electromagnetic switching valve 433 has a first position Fia that cuts off communication between the conduit 18 and the conduit 20 and the return S pipe 46 connected to the tank 1 and the solenoid 43a. A second position 1i that connects the conduit 18 and the conduit 20 by performing
1), and a third position l1lIIC etc. which communicates and connects the return conduit 46 and the conduit 20, etc. Similarly, the electromagnetic switch 1t44 communicates between the conduit 19 and the conduit 21 and the return conduit/I-7 connected to the reserve tank 1.
First position 1i'ff to cut off communication with pipe 2-1
a, solenoid 4/1. When the conduit 19 and the dedicated casing 21 are connected to each other by being energized to the second position J, the return conductor 7x47 is connected to the conduit 21 in the third position C. The solenoid switching valve 4
5 is communication between the conduit 16 and the conduit 22 and the reserve tank 1
The communication between the return conduit 48 and the conduit 22 connected to
The conduit 16 and the conduit 22 are connected to each other by connecting the first position a where the solenoid 458 is energized and the conduit F'HI
At the first position, the return conduit 48 and the conduit 22 are switched to the third position Hc, in which the return conduit 48 and the conduit 22 are connected in communication.

In the middle of conduit 20, 21, 24, 25, there are 4
=J check valve devices 49 to 52 are installed LJ. Compare 4=J reverse 1
56 and (a bus passage 57- that bypasses these apertures)
In the middle of 60 there is a stage ( ) and each actuator 2 ~
Allow the oil to flow freely towards /"l 'J-2i,', [: -Even 2 □-5J: V) 'iu
The check valves 61 to G4, which block the flow of oil toward the Mi switching valves 43 to 45, are numbered "I". Further, in the middle of the conduit 25, there is provided a normally closed closed valve 65 which is closed when the solenoid 65a is energized. 70-
The oil is prevented from moving back t1 between the actuators 4 and 5 via the divider 23 and the conduit 25, thereby ensuring the roll stiffness f1 of the vehicle.

It should be noted that the O-dividers 14 and 17.23 have throttles 14a and 14b1, throttles 17a and 17b1, and throttles 2aa and 23b4j inside, respectively. Regardless of the case, the oil supplied to the upstream side of each is divided at a flow rate corresponding to the ratio of the effective passage cross-sectional area of the throttle.

The electromagnetic on-off valves 42, 65 and electromagnetic switching valves 43 to 45 shown in FIG. 1 are controlled by a control device 66 shown in FIG. The control device 66 includes a micro combi coater 67.

The microcomputer 67 is of a general construction, an example of which is shown in FIG.

This microcomputer 67 has a central processing unit 1.
~ (CI) tJ) 68 and lead nonremet ts (RO
M) 69, a random access memory (RAM>70), an input port device 71 and output ports 1 to 7V2, which are interconnected to a bidirectional common bus 73.

The device 71 has an ignition switch (t
:s, >74 is +! Check whether 11fa is enabled or not.
The signal from the 1 door sensor 1) 75 indicates whether the shift 1 lever is switched to the new 1 to natural (N> position or the parking (P) position). and a signal from the shift lever sensor 76 indicating whether the parking brake m:1 (P, B,) is in the operating position or not.
A signal from the sensor 77, a signal from the front wheel convex sensor 78 that detects the vehicle height of the front wheels, a signal from the rear wheel height sensor 79 that detects the vehicle height of the rear wheels, and a signal from the microcomputer 67.
A vehicle height adjustment switch (SW) installed inside the vehicle T and operated when adjusting the middle height in manual mode. 81, the data is converted into signals as appropriate, and signals are output to the CPU 68 and RAM 70 in accordance with the support of the CPU 68. ROM (39 is the normal driving of the vehicle (front wheel relay suitable for J and rear wheel medium height 12,
Front wheel height and rear wheel height 1-11 suitable for passengers,
Suitable for driving on rough roads, etc. The front wheel vehicle height and rear wheel height are memorized, and (lI) tJ68 adjusts the vehicle height to an indicator 82 provided in the passenger compartment based on the signals from each vehicle. and a signal indicating the tilting state of the vehicle body is outputted via the output boat device 72, and the solenoids 42a, 65a, 43
8, 44a, 4.5a F (D Tall
A signal indicating "1" is outputted via the output boat device 72.The vehicle heights 1-(1-18) may each have a predetermined range.

For example, when the mode changeover switch 80 is in the manual mode, the microphone 1-1 computer 67 adjusts the vehicle height while the pump 26 is operating based on the output from the center convex adjustment switch 81 operated by the driver. increase v
When performing IJ adjustment or adjusting the tilting state of the vehicle body by avoiding increasing the vehicle height of the front or rear wheels, energize the solenoid 42a and the solenoid 65a by turning 11-'i.
M ltiIFII Close the rfl valve 42, open the electromagnetic on-off valve 65, and open the solenoids 43a, 44a, 45.
a k: energize T m lti 9J switching valve 43~
45 to the second position A, and when adjusting the tilted state of the vehicle by increasing the vehicle height or increasing the middle height of the front or rear wheels while the pump 26 is stopped. To do this, energize the solenoid 65a to open the solenoid valve 6.
5 is opened, the solenoids 43a, 44a, and 45a are energized to switch the electromagnetic switching valves 43 to 45 to their second positions, and the vehicle height is further reduced regardless of whether or not the pump 26 is operated. When making adjustments or for front or rear wheels of the car ^
Reduce? When adjusting the tilting state of the vehicle body by energizing the solenoid 65a,
5 is opened, the solenoids 43a and 44aJ45a are energized, and the electromagnetic on-off valves 43 to 45 are moved to the third position w! tc
It is now possible to switch to .

Operation of the embodiment In the embodiment assembled as described above, the mode cut weave l-/
9-hand An Bummer 1"'i' J17Mod ζL Single Suspension T, when increasing the vehicle height while the pump 26 is operating, or increasing the vehicle height of the front or rear wheels. When adjusting the inclination state of the vehicle body, the microcomputer 67 opens the electromagnetic on-off valve 42 based on the driver's operation of the vehicle height adjustment switch ε11. is opened, and the solenoid switching valve 4
3 to 45 are switched to the second position, whereby the oil discharged from the pump 26 is sent under pressure to the cylinder chambers 9 of the actuators 2 to 5 through the conduit 13 and the like. Therefore, in this case, the oil in the accumulator 38 is not consumed, so that the accumulated pressure in the accumulator is prevented from decreasing to a pressure close to or below the lower limit set by the pressure control valve 33. Furthermore, when adjusting the height of the vehicle while the pump 26 is stopped, or when adjusting the inclination of the vehicle body by increasing the front or rear wheels, the microcomputer 67 controls the electromagnetic device 11. valve 65
is opened, and the electromagnetic switching valves 43 and 45 are switched to their second positions, whereby the oil accumulated in the accumulator 38 passes through the conduit 37 and the like to the actuator 2.
~5 cylinder chamber 9 under pressure. Furthermore, regardless of whether the pump 26 is operated or not, when adjusting the low yIAwI of medium and high heights or when adjusting the tilting state of the vehicle body by reducing the vehicle height of the front or rear wheels, the microcomputer 67 Electric! The ti1711 closing valve 65 is closed 1111 times, and the electromagnetic switching valve=43-45 is switched to its third position C, whereby the oil in the cylinder chamber 9 of the actuators 2-5 is transferred to the dedicated pipes 20-22, 24, 25 and Aperture 5
3 to 56, etc., and is discharged to the reserve tank 1.

Next, referring to Fig. 3 and Fig. 5, when the mode selector switch 80 is in the automatic mode, the vehicle height H is set to a height suitable for getting on and off (a height suitable for the eyes and turning tj of the vehicle). Width ^l
The operation of automatically adjusting to -12 will be explained using a case where the vehicle is a limousine (1-I + 12) as an example.

In the first step 1, it is determined whether the ignition switch 74 is closed or not, and if the ignition switch 74 is not opened, it is reset. When the ignition switch is closed, proceed to step 2 and raise the vehicle height! is increased to 1-Iz. In this case, the detail driver 0-chi 11 in Fig. 4
As shown in detail in FIG. 1, it is determined in step 21 whether the door is closed, and if the door is open, step 21 is repeated. When the door sensor 75 detects that the door is closed, the process advances to steps 22 and 23. In step 22, the output boat device 72 outputs a signal for energizing the solenoid 42a, thereby closing the electromagnetic on-off valve 42. In step 23, the output boat device 72 outputs a signal for energizing the solenoid 65a, thereby closing the electromagnetic on-off valve 65.

In the next step 24, it is determined whether or not the electromagnetic switching valves 43 and 45 are in the second position.
If 5 is not in the second position, proceed to step 25;
When the if magnetic switching valve/'1.2-45 is in the second position, step 25 is jumped and the process proceeds to step 26. In this case, the output boat device 72 determines whether or not the electromagnetic switching valves 42 to 45 are in the second position using the solenoid 43.
This is done depending on whether or not a signal is output to switch the 7t2...l111m valves 42 to 45 to their second positions. In step 25, the output boat device 7
By outputting a signal for energizing the resolenoids 43a to 45a, the electromagnetic switching valves 43 to 45 are switched to their second positions. As a result, oil is supplied from the reserve tank 1 to each actuator 2-5 through the conduit 138 by the pump 26, thereby increasing the vehicle height.

In step 26, it is determined whether the width m1-1 has become tl2. When it is detected by the front wheel height sensor 78 and the rear wheel height sensor 79 that lla has not reached 12, the process returns to step 21 and step 22-26 is returned to Ii1.Front wheel height sensor 78
When the rear wheel height sensor 79 detects that the vehicle height has reached 12, the output of the signal for energizing the stemoids 43a to 45a is stopped, and the electromagnetic switching valves 43 to 45 are set to the first position. In step 28, the output of the signal for energizing the solenoid 65a is stopped, so that the electromagnetic on-off valve 65 is closed.
In step 29, the output of the signal for energizing the solenoid 71.2a is stopped, so that the electric current 11.
The closing valve 42 is closed, thereby stopping the vehicle height increase adjustment.

Thus the car ^ becomes vehicle run 11: 'a L k vehicle height l
-12 and when the vehicle starts running at ft1l,
Proceeding to the next step 3, it is determined whether the mode selector switch 80 has been switched to the manual mode.

When the mode selector switch 80 is switched to manual mode, the process advances to step 4, and the vehicle height is adjusted to the desired vehicle height based on the driver's operation of the vehicle height adjustment switch 81, as in the case of manual mode operation described above. Ready for step 5. In step 3, mode selector switch 8
Even if it is determined that 0 has not been switched to manual mode, the process proceeds to step 5, and in step 5, it is determined whether or not the C ignition switch 74 is opened. . If the ignition switch 74 is opened and it is determined that the 1. : If so, proceed to step 6 and change the vehicle height 1-1 (-
A vehicle n reduction adjustment is performed that reduces the number of blind people.

In this step 6/I'1, as shown in detail in FIG.
) position or (L parking (I)) position. If the shift lever is not in the two-coatral or parking position, step 61 is repeated. When it is detected that the shift I-lever switch 7G has been switched to the re-shift lever 1-tral position or the parking position 11/, the process proceeds to step 62. In step 6, -C determines whether the parking brake is operated or not, and if the parking brake is not operated, the step 62 is repeated. When it is detected that the parking brake has been activated by the parking brake, step 6
Go forward 3. In step 63), it is determined whether the door is closed or open, and if any door is open, step 63 is repeated.

When the door lens 75 detects that the door to the garage is closed, the process advances to step 64. In step 6/l, the solenoid 65a is energized to operate the electromagnetic on-off valve 65 lft1.

In the next step 65, it is determined whether the electromagnetic switching valves 43 to 45 are in the third position C or not.

When the electromagnetic switching valves 43 to 45 are not in the third position C, the process proceeds to step 66, and when the electromagnetic switching valves 43 to 45 are in the third position C, the process jumps to step 66 and proceeds to step 67. At step 66, the electromagnetic switching valves 43 to 45 are switched to the third position C by outputting a signal from the device 72 to energize the solenoids 4.3a to 45a. In step 67, it is determined whether the vehicle height 11 has become 112, and the vehicle height 11 has been reduced to 1 by the front wheel height adjustment 78 and the rear wheel height adjustment 79.
When it is detected that the height is not -12, the process returns to step 61 and the front wheel vehicle, zero level 78 and rear wheel φ height V
When it is detected by 79 that the number 1 has become 112, the process advances to step 68. In step 68-C
When the energization to the solenoids 4.3a to 45a is stopped, the electromagnetic switching valves 43 to 45 are switched to the first position and closed, and in step 69, the energization to the solenoid 65a is stopped. Electromagnetic opening/closing due to being stopped?
65 is closed, and thereby the vehicle height 11 is maintained at 1-12 until the J carrot is restarted.

Hereinafter, the present invention will be described in detail with reference to specific embodiments, and the present invention will not be limited to such embodiments. It will be clear to those skilled in the art that embodiments of the following are possible.

[Brief explanation of the drawing]

Fig. 1 shows a schematic configuration diagram of one embodiment of the vehicle adjustment device according to the present invention, and Fig. 2 shows a control device for controlling the operation of the electromagnetic on-off valve etc. shown in Fig. 1. Zukaizu, Part 3
5 to 5 are flowcharts showing the operation of the IC vehicle height adjustment device 2 and the control device d shown in FIGS. 1 and 2. . 1... Reserve tank, 2-5... Actuator. 6...Cylinder, 7...Bis 1 Hen, 8...Gui 17 noram. 9... Cylinder chamber, 10... Liquid chamber, 11... Gas chamber. 12... Fluid pressurized tank, 13... Lead r<, 1/l
...Flow divider, 14a, 1/IJ...
Aperture, 15.1G...Conduit, 17...Frody bike, 17a, 171)...Aperture, 18-22...
) pipe, 23...flow divider, 23a, 23
1+-...Aperture, 2/1.25...Conduit, 26...
pump, 27...return conduit, 28...flow control valve,
29...Relief valve, aO...NO'1-GlyA safety valve, 31...jjlfT, 32...Other fluid pressure devices, 33...11 Force control valve, 3/l... ·non-return valve,
35...Return conduit, 36...Connection portion, 37...Conduit, 38...Accumulator, 39...Die~7 noram, 40...Liquid chamber. 41... Gas chamber, 42... Solenoid on/off valve, 42a...
・Solenoid, 43-415...Solenoid switching valve, 43a
~45a...Soleno, Ido, 46~? 4 B-1
u9ii) Answer S, 49-52... Check valve device with throttle, 53-56... Throttle. 57-60... Bypass passage, 61-64... Check valve. 65... Solenoid c11 valve, 65a... Solenoid,
66...11i head, 67...Microphone 1" double coater, 68...Central processing unit (CI) U)
,,69...Read only memory (ROM>,70...
...Random access memory (RAM), 71...Human powered boat device, 72...Output capo 1-head, 73...
・Combus, 74...ignition switch,
75...Door sensor, 76...Shift 1-lever hinge 1, 77...Parking brake sensor, 78...
・Front wheel height sensor, 79... Rear wheel height sensor, 80.
・・Side switch, switch, 81・Slight height adjustment switch, E32・・Indicator 4, 'J FI IJI
IIf one person to a self eii stock company? 1st Patent Attorney Masaki Akashi (Method) (Voluntary) Procedural Amendment i-nee>,:+ January 18, 1981 Commissioner of the Patent Office Kazuo Wakasugi 1, Matter (indication of i) 1985 Patent Application No. 193769 2 Name of the invention FlJ ia adjustment equipment for wide vehicles 3 Person in charge of making amendments A'1 Special Yf fli m1 Address Toyota-cho, Toyota City, Aichi Prefecture 1 Address Name (320) ToB Yuu Jidochu Co., Ltd. 4, Agent Address @1 (14 G, 1-5-19 Shinkawa, Chuo-ku, Tokyo, Subject of amendment Drawings

Claims (2)

[Claims] (1) Made! P, 13 Fluid source and hydraulic hydraulic actuator 1 that increases and decreases the vehicle by supplying and discharging working fluid.
- passage means for communicating and connecting the working fluid source and the actuator;
- A first on-off valve installed in the middle of the passage means in the evening room, a drain passage means for discharging the working fluid in the actuator, and a first on-off valve installed in the middle of the drain passage means. the second opening/closing valve, and the first and second opening/closing valves;
It has a control means for controlling the opening and closing of the Y1 valve, a first detection stage for detecting whether the engine is being operated or an old one, and a second detection means for detecting the middle and high temperatures, and the control means is for controlling the opening and closing of the y1 valve. When high adjustment is not being performed, the first and second on-off valves are kept closed, and the first detection means detects that the engine operation has been stopped. i refers to -t (one of the first on-off valves) and the second on-off valve is opened, and then the second detection means detects that the vehicle height has reached a predetermined state. In response to this, the opened on-off valve is closed!1
! Taegawa vehicle height adjustment device. (2) A working fluid source, a hydraulic actuator that increases or decreases the vehicle height by being supplied with working fluid, passage means for communicating and connecting the working fluid source and the actuator, and the working fluid source. a first on-off valve provided in the middle of the passage means between the actuator and the actuator, a drain passage means for discharging the working fluid in the actuator, and a first opening/closing valve provided in the middle of the drain passage means. a second on-off valve, a control means for controlling the opening and closing of the first and second on-off valves, and a first detection means for detecting whether or not the engine is being operated; and a second detection means, and the control means maintains the first and second on-off valves in a closed state when the mid-height V4 adjustment is not performed, and the first detection means controls the engine. When it is detected that the operation has been stopped, one of the first and second on-off valves is opened in response to the detection, and then the second detection means causes the second detection means to open the first and second on-off valves. 11 above in response to the detection of the condition.
fl valve is opened / j-7'j on-off valve is opened ur: This state is maintained, and when the first detection means detects that the operation of the engine has started, responds thereto. C. When the other of the first and second on-off valves is opened and the second detecting means detects that the height 11 is in a predetermined second state, in response to that, the above-mentioned 611 Close the other open/close valve I! A vehicle height adjustment device configured as follows.