JPS5950804A - Leveling device of suspension for vehicle - Google Patents

Abstract

PURPOSE:To control a vehicle to be restored to its attitude and surely prevent the vehicle from its accident of tumbling or the like, by promptly correcting a change of car height due to centrifugal force at a drive of running on a curved road. CONSTITUTION:It is decided by timer circuits 17, 18 whether or not a signal output from comparator circuits 13, 14 is lasting for a length above the reference time. The timer circuit 17 comprises two inverter circuits IN1, IN2, resistors R1, R2, capacitors C1, C2 and a transistor TR1. If a piston 4a is moved by a distance l1 or more, that is, car height is decreased by the distance l1 by increasing a load on a vehicle, a signal of level ''1'' is output from the circuit 13 and respectively input to an AND circuit 19 and the timer circuit 17, as the result, charged electricity of the capacitors C1, C2 in the timer circuit 17 is discharged through the resistor R1, in this way, terminal voltages of those capacitors are decreased.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a leveling device for a vehicle suspension system 1.

In a single-installation vehicle of A'4, there are fluid pressure cylinders, which act as fluid pressure regulators, between the left and right ends of the axle and the vehicle body. When the center height changes due to the centrifugal force acting on the vehicle while driving, both cylinders automatically retract and extend until the end of the cylinder is activated by a chemical signal. A leveling device that maintains high capacity is in practical use.

By the way, 1/Belling 4 Qji'j I7 - ``2'' Since the change in vehicle height is detected from the distance between the entire vehicle body and the axle, it is possible to detect irregularities in the road surface.
C A change in vehicle height is detected even when the cylinder expands or contracts, but if the cylinder is leveled at that time, the tJ% effect of the cylinder will be suppressed, resulting in poor ride comfort on the center axis.

So, cousin, the expansion of the cylinder due to irregularities in the road surface is 1.
(Take advantage of the short 11 hours [7°C was detected in the vehicle body] only to be able to use the cylinder cylinder 17 Pelling system A-J).

Is there a certain amount of 11' in the above judgment? C2,
・Therefore, 1. (1 ri, -) 1 Due to the change in height due to centrifugal force, Zhongsen was H4. This resulted in the inconvenience that the vehicle FD4's position was the same and the vehicle was delayed.

1. In view of this point, we have developed a leveling neck system for vehicles and suspensions that can quickly compensate for changes in vehicle height due to centripetal force when driving around curves and completely restore the vehicle's posture. Provided (7).

IJ, below, the present invention will now be described with reference to all of the illustrated embodiments.

I''is l 12:l It is the leveling device according to the present invention that exceeds m'5c% of the suspension.
Please read the missing part 1. 1' of 21 circuits without controlling i debt: J', IMHp+Haru accept each.

Suspension fj'et+''■11,i shown in Figure 1
:r, S1 is connected to valve L, and there is an interposed T between vehicle body 2 and axle 3.
The pressure shock absorber is equipped with a cylinder 4 and a base part lT' of the cylinder 4, and a pressure absorber 5 connected to the force chamber. Due to the p movement of the piston 4a, the pressure of the gas sealed in the crystal f:da(eru4i'!function, a. Last name above 2 i1]
A spring action is applied to the cylinder 4, and [L (,'! Full power, ball).

゛respension for the car on the left side @6 in the same figure (t1°・"i is shown, but l:", :l is shown 1-
The right 1111 Tp wheel has the same suspension as the one in 1. I I! ! , one rack is installed.

Control circuit shown in FIG. 2=8. t, l:, height sensor "7. steering angle detector 8 and jlj ;・1<
According to the output signal of the 4-pin core 9], pc< 1rr 1 shown in 1 17 car 11+, magnetic valve j no l/noid river, 1
1) η selection drive-1 100 S d! S II
The same control circuit is applied to the right-hand span indicator 1t;.l!4<1 shown in the figure (not minus).

Soil part 1 height Senrift, from the above type 1hII3:
A rod 12KJ- is a body densimeter which is rotated by a rod 12KJ- protruding from f, rl', j, 'f, .
) tIf: 9j, I response [7] outputs a voltage eb'e.

The comparison circuits 13 and 14 respectively compare the output voltage eh of the disease sensor 7 with the reference voltages e□ and eL, and the comparison circuits 1. i l,' e lt ':' ell
When, 7), Jl; heavy, 1 time)'+414 tl
, e b ”-, -e Tom, respectively, p3 J!
l! 1/Bell "l" number 100 is output respectively.

What? "Two fertilizer standard frost", pressure eIT+ef, t"1, "-
The piston 4a of the cylinder 4 has a predetermined distance 1 shown in FIG.
．． ．． What is the output voltage of the sensor 7 when it moves downward by 13 degrees? -1 response (ㅅC exists.

The steering angle detector 8 and the vehicle speed detector 9t generate electric currents 1'T'' and 9t with values corresponding to the steering angle and vehicle speed.
, ICvt respectively, and the comparison circuit 15゜16I/yo, l: it-: output ■1 pressure er+e
It has the effect of outputting a signal of logic level ``1'' when V exceeds a predetermined value.

Timer circuit 17, 18tJ1, - γ circuit 1:
Based on the signals output from 1 and 14) W Q between 10 J!
1i47. +, l, CI/% 2) This is provided to judge whether or not it is true. 1. Or1. timer circuit 17
112 inverter circuits IN, , IN.

and resistor IT for setting the above reference time '5C, R+
, It? The timer circuit 18 also has a similar configuration, and the timer circuit 18 has a similar configuration. ri is fl'#
1) The piston 4a of the cylinder 4 is at the distance 1'
When the vehicle is moved to one side (below 1), that is, when the vehicle height is lowered to el, the logic level ``1'' is output from the circuit 1:l as shown in Fig. 3(a). , this signal is input to the t-t AND circuit 19 and the timer circuit 17, respectively. As a result, the capacitor C of the timer circuit 17
The charges stored at 8°C2 are discharged through the resistors tt and '6, and as a result, the terminal voltages of these capacitors decrease as shown in FIG. 2(b).

However, ψ1 of the second capacitor CI w C*. ① When the voltage decreases at the threshold η of the 7-harter circuit INx/pel v5, the AND circuit 19 outputs the signal shown in FIG.
: The solenoid river is visited. - When the spool of the solenoid valve 1 is moved to the right, the hydraulic oil of the pump P flows upward.
, is fitted into the upper pressure chamber of the cylinder 4, so the piston 4a is lowered and the vehicle height is compensated for.
be done.

In addition, (+'(The load is +vt filtered and
When it becomes tJ, from comparison circuit 14 A+i J,'
l! L/He/l, "1°" (7) Since the signal force is output, the other Lenoid 11 is energized, and the above-mentioned series; Parameter 4 is issued by the controller so that the height of 41 becomes lower. .

By the way, due to the unevenness of the road surface, the upper part of the piston 4a is raised.
Leaf is output, but when this signal is 1') 1 璋, l, 1,
Based on the above-mentioned cargo, it is smaller than the time width of the signal.

Therefore, in such a case, upper H1: capacitor CI of the timer circuit 17.

C2 released? +i, At the time when the guard started 1. Karasada Fundenza's Panting-Tunsho 11] Threshold Level Vs'
The output signal of the comparator circuit 13 falls during the time point t (reference time T+) at which the timer circuit 17 falls, and therefore the timer circuit 17 outputs the logic l/be/1"0" at 11'f.
'I' knee output will be output. Even if the piston 4a is bent by 1 due to the unevenness of the road surface,
5; tt) [The operation of the cylinder 4 due to unevenness of the road surface is prohibited.

Next, for example, the vehicle makes a right turn. Consider a pigeon coop.

In such a case, centrifugal force acts on the jlj vehicle, so the vehicle moves in the direction of action of the centrifugal force at $1Qlr<. In other words, the left [111
Earth Nl against the wheel + piston 4a of cylinder 4 is ``2! While #b (vehicle height lowers), the piston 75 of the cylinder moves as shown in the figure in the right fill.

1. The centrifugal force is proportional to the vehicle speed and the steering angle. Therefore, if the steering wheel + exceeds a certain level due to this centrifugal force, then F'ljl R1: Swing angle detector 8 and the output signal er of the vehicle speed detector 9,
If ey also has a magnitude greater than a certain value [7, the comparator circuits 35 and 16 each output a signal of logic level "1". Therefore, the output signal "1" 6 of the comparator circuit 15
・[Switch Green::11 Since the switch is closed, the ratio is
F Month 1 path I6σ) Output C1 ``l'' is the inverter circuit ■To 13 cases (7 in front 1.11 timer circle σ) l・Ranjisk 1' l? , , the transistor 'I' It is inputted to Jl, 7+, 14-.
Lol.

]・The run disk 1'll is cut, but the - end of the man yen-IJc is opened, so the other connector j':/re C, and the resistor R, are very strong.) ['Release 117. n〒>14 number 31'! l (
11) As shown by the dotted line, i of the condenser CI is 1;
'l'li good, the river goes low. This Yukon, soil 11
1°Ind circuit 1q output signal 1211 time t2'(<
t,)-”: tt, l: t):,su,-j4
) frme then/;'lj t 2' up 1414 syrin〃4σ) sleeve 11 work translation CFll: f work 1Fil+) starts. In other words: +l: Medium rise due to E mental force [11゛f to 11, 10 +' timer 111 ``817;
'ji semi-hourly opening time is changed from 1 to 1゛2, and this -
”, if on if “: f” + (! (4//, 'than the car height Nika I temple; 1 + Yaka trunk Niji Linda 4 sleeve i
[Operation begins.] .

・On the other hand, the timer time i'; s18 in the control circuit following the right side jli not shown in -1, 1, 1] right-hand circuit 1 times + 1; Kj is the cylinder for the right f11 large cylinder feed, and the cylinder P is opposite to the above Zi', Ill cylinder 4.
1 in a series of consecutive crab sleeves (iI: activated).

However, the vehicle posture interval 6i (when traveling on a curve) is performed very quickly.

In the above embodiment, the I-transistor TIt.

Although T R,' is operated as a main-off, Iz, the output signal evfiT of the vehicle speed detector 9 may be used for analog control of the transistor C).

In addition, the output type E of the ring detector 8 and the vehicle speed detector 9 is expressed as er and ey. To the rhinoceros that has grown bigger than it: ) 5 :/ cisp
T J, Tltl'ke off, t yo J:
ij,': The power j1 fn'+k may be used to apply analog control to those transistors i+1+.

Furthermore, the above criteria? I7. IE en, et,
11 consisting of resistors Rs, R4 and Rs
As shown in Figure 1, the fourth transistor TR1i is interposed in the first path, and the base of this transistor ↑ when closed.
1trT:, '5 (A switch element 21 may be provided in the upper row, and the switch element -r2ti may be closed by the output signal of the comparison circuit 15.
・1:,・・・When the centrifugal force of footrest −[− is applied to medium, M:li, upper ft+2 standard city, 11', e 11
.

The value of e l changes [7, as shown in the 2r figure] [Also, the distance M
I 1.12 is actually small i! Since the player will be bowed, the posture will be recovered more quickly. In this case as well, -Hni: ) Multiplying the output voltage er or Fi of the transistor T It, iS・y° ring angle detector 8, and the output voltage Iv, er of the vehicle speed detector 9 by the output voltage ey of the vehicle speed detector 9. It is possible to perform analog control on the result.

According to the present invention, it is possible to recover the posture of the vehicle by correcting the change in mid-height when traveling on a curve, thereby reliably preventing vehicle overturning accidents. I can do it.

[Brief explanation of the drawing]

Nf 1 is a conceptual diagram showing one embodiment of the zaspency 1-like IHh in the leveling device for unexploded Qfl;
t' + u, 1F spenge g/<& shown in PC mouth diagram
A block diagram showing one embodiment of a circuit for controlling V't k is shown in FIG. 3, which explains the operation and failure of the circuit shown in FIG. This is a circuit diagram partially showing an example of i1, f. 1. City, Magnolia, 2. Monkey, 3, 11th year of junior high school, 4.
...'Respension cylinder, 7... Quality sensor\8
・・Sphering angle detector, 9・Vehicle speed detector, river, 1
1...So17oid, 13.14, 15, ](
i...comparison circuit, 37, LR...timer circuit,
TR,,TIE,',Ttt,...Transistor. Figure 3 Figure 4

Claims (2)

[Claims] (1) Interposed between the left and right ends of the axle and the vehicle body.
A shock absorber for fluid fluid, a means for detecting a change in the vehicle height of the left and right sides of the offshore vehicle, and a means for detecting whether the left and right vehicle height changes are longer than the base time or not. A means for determining and complete provision for fully extending or retracting the hydraulic shock absorber on the side that is causing the vehicle height change when it is determined that the vehicle height change continues for longer than the reference time. Te junior high school 4
In the correction device, a means for detecting the centrifugal force acting on the vehicle is provided, and the magnitude of this centrifugal force is determined by J, (
1. A leveling device for a car rental/lease pension, characterized in that a means for completely changing the reference time in the l%r judgment means is provided. (2) A vehicle speed detector and a steering angle detector are provided, and based on the vehicle speed and steering angle detected by them, it is possible to calculate
t'L L, fi: 'l'>i'lClaims;
A leveling device for medium-sized vehicles as described in FS ().