JPS5843814A - Apparatus for adjusting height of vehicle - Google Patents

Abstract

PURPOSE:To simplify the constitution of a circuit, by providing two vehicle height detecting means for issuing vehicle height detected signals in the same level, and delaying only the output signal of the first vehicle height detecting means to judge discriminate the height of the vehicle. CONSTITUTION:The vehicle height detector 100 consists of photosensors 101, 102 comprising luminescent diodes and photo transistors, an output signal of the photosensor 101 is applied to a delay circuit 210 of the vehicle height adjusting and controlling apparatus, and an output signal (b) of the photosensor 102 and an output signal of the delay circuit 210 are applied to a vehicle height judging gate circuit 220. Thus when an output end Q3 of a counter CO1 of the delay circuit 210 and the output signal (b) of the photosensor 102 become H, the vehicle height is judged as high, while when the output end Q3 of the counter CO1 becomes H and the output signal (b) of the photosensor 102 becomes L, the vehicle height is judged as low.

Description

[Detailed Description of the Invention] A vehicle height adjustment device that detects the height between vehicle body frames with a vehicle height detector and controls the fluid pressure of a suspension system in correspondence with the detected vehicle height to maintain the vehicle height within a predetermined range. , regarding.

In this type of vehicle height adjustment, for example, US Pat.
As disclosed in Specification No. 05216 (1978 Class 280) K, a vehicle height image area is detected by a vehicle height detector,
The vehicle height adjustment control circuit processes the detection signal to obtain a signal that energizes the vehicle height adjustment drive system.This signal is given to the drive system, and when the vehicle height is "high" in the drive system, the suspension is activated. Decrease fluid pressure in the device and increase fluid pressure when it is "low". Therefore, in order to prevent repeated fluid pressure reduction operations when the detected vehicle height vibrates near the boundary between "medium" and "high", and when it vibrates near the boundary between "medium" and "low", In order to prevent repeated fluid pressure increase operations, the vehicle height adjustment control circuit generally includes one set of rise delay circuits for the vehicle height "high" signal processing system and the vehicle height "low" signal processing system. Teori,
In addition, in order to prevent continuous compressor operation when the vehicle height is hardly raised when the vehicle weight is large, we also provide continuous fluid pressure release (relief valve opening) when the vehicle height does not drop below that level. ) In order to prevent energization, the vehicle height adjustment control circuit (in the vehicle height adjustment control circuit), a set of energization time limit circuits is included in each of the vehicle height "high" signal processing system and the vehicle height "low" signal processing system.

That is, in the past, two sets of rise delay circuits, two sets of time limit circuits, and a large number of logic gate circuits connected thereto were required. Therefore, there are many electrical elements in the vehicle height adjustment control circuit. In contrast, in the above-mentioned US patent, one set of rise delay circuits is omitted and the remaining set is shared by the vehicle height "high" signal processing system and the "low" signal processing system, thereby reducing the number of electrical elements.

Another object of the present invention is to provide a vehicle height adjustment device including a vehicle height adjustment control circuit with fewer electrical elements.

In order to serialize this purpose, in the present invention, a first vehicle height detection means that generates a vehicle height detection signal of the same level for both vehicle height "high" which is higher than the target vehicle height and vehicle height "low" which is lower than the target vehicle height is provided. At least two vehicle height detection means including: an output signal of the delay means for delaying a vehicle height detection signal indicating "high" or "low" from the first vehicle height detection means and the other vehicle height detection means; The vehicle height is determined based on the combination with the signal from the vehicle. According to this, a single delay means is required and the number of logic gate circuits can be reduced.

Hereinafter, the present invention will be described in detail with reference to the drawings.

First, a vehicle height detector 100 according to an embodiment will be described. As shown in FIG. 1a, this is fixed to a vehicle body frame 10, and one end of a rotating shaft link 20 is connected to the vehicle height detector 100.
The other end of this link 20 is coupled to the outer case of the differential gear 30. 40 is an axle. A cross-sectional view of the vehicle height detector 100 is shown in FIG. 1b. Vehicle height detector 100
, an arc-shaped fold 1 is provided at the tip of the rotating shaft 108.
A light shield @tOS formed with 04 is fixed, and a link 20 is fixed to the other end. A printed circuit board 107 is fixed to the base 106.
7 sensors 101 and 102 are fixed to 07.

1st. The sectional view on line ■c-Ic of figure b is shown in figure 1C,
d and 1e. Figure 1C shows a state where the vehicle height is high, Figure 1d shows a state where the vehicle height is medium, and Figure 1e shows a state where the vehicle height is medium.
The figure shows a state where the vehicle height is low. Photo sensor 101, 10
2 are each composed of a light emitting diode and a phototransistor, and a folded back 104 of a light shielding plate 105 blocks light from the former to the latter.

FIG. 2 shows an embodiment of vehicle height adjustment control that is connected to the vehicle height detector 100 and controls opening and closing of a relief valve 240 for releasing air pressure from the suspension system 400 and a relay 303 for energizing the compressor 302. Device (210, 220)
shows. This vehicle height adjustment control device is composed of a delay circuit 210 and a vehicle height discrimination gate circuit 220. Delay circuit 21
0 is applied with the output signal a of the photosensor 101 which is the first vehicle height detection means, and the output signal a of the photosensor 102 which is the second vehicle height detection means is applied to the vehicle height discrimination gate circuit 220. 210 output signal is applied. In this embodiment, the photosensors 101, 102 connected to the vehicle height adjustment control circuit device (210, 220) produce outputs shown in Table 1 depending on the vehicle height.

(Note) H is a positive predetermined level, L is a ground level. The delay circuit 210 is composed of a counter COI and an inverter N0TI. Counter COI is Photo Insect 101
When the output signal a is H (vehicle height is "medium"), it is cleared and the output terminal Q is set to L.

Signal a fJ: L <Vehicle height is “high” or “low”)
When this happens, clock pulse counting is started, and when a predetermined number of clock pulses have been counted, the output terminal Qa is set to H.

When Q3 becomes HK, the output of inverter N0TI is inverted to L, so C0UNTENABLE of counter C01 becomes L to stop counting and hold output terminal Q at H. AND gate ANIK is the output terminal Q3 of counter CO1
The signal and the output signal of the photosensor 102 are applied,
And gate AN2 has a counter.

A signal obtained by inverting the signal of the output terminal Q of the COI and the output signal of the seventh otosensor 102 by an inverter NoTK is applied. Output terminal Q of counter COI and photo sensor 1
．． When the output signal of 02 is IK, the vehicle height is determined as "high", and the output of ANI is HKtx, and the amplifier A
Solenoid pulp (relief pulp) 2 via MPI
40 to lower the pressure and lower the vehicle height. The output terminal Q of the counter COI becomes H, and the photosensor 102
When the output signal of the inverter N0T2 becomes L, the output of the inverter N0T2 becomes H, and the vehicle height is determined to be "low", and the AN2
When the output of
03, electric power is supplied to the motor 301, and the compressor 302 is driven.1. □Raise the i-mini. When the vehicle height reaches the target vehicle height "medium", the counter CO1 is cleared, its output terminal Q becomes LK, and the AND gate ANI is cleared.
The outputs of AN2 and AN2 both become L, and raising or lowering of the vehicle height is stopped. 400 is a suspension device for adjusting the vehicle height.

Next, another embodiment of the present invention will be described with reference to FIGS. 3a to 3d and 4F. In this embodiment, two photosensors 101.
102, but the folded back 104a of the light shielding plate 105
104b configuration with vehicle height "high", "medium high", "medium low"
and [A] produces output signals (shown in Table 2) corresponding to the four stages of illusion.

Figures 3a to 3a show the vehicle height detector 1'<) O IC.
3A, 3B, 3C, and 3D show vehicle heights of "high" and "medium high", respectively.

Indicates "medium low" and "1" states.

FIG. 4 shows the vehicle height control device (211, 221).

The delay circuit 211 is composed of a transistor QI, a counter COI and an inverter N0TI, and the vehicle height discrimination gate circuit 221 is composed of a transistor Q2t, an inverter N0T2
．． R/S flip 70 tube F, Noah game) N
OR1, N0R2, and R/S flip-flop F2 (NOR3, N0R4).

Vehicle height control (1) to (vD) shown in Table 2 will be explained below.

+1) When the vehicle height is "high", the output signal a of the photosensor 101, which is the first vehicle height detection means, becomes H, which is inverted by the transistor Q1, and the clear terminal of the counter CO1 becomes L. When the clear terminal of COI becomes L, it starts counting clock pulses, and when a predetermined clock pulse is counted, the output terminal Q of the counter COI becomes H,
R/S flip-flop F, IF, set manual S
becomes H (set). On the other hand, the output signal of the photosensor 102, which is the second vehicle height detection means, becomes L, which is inverted by the transistor Q2 and applied to the reset input (R) of the R/S flip-flop F2, so that the reset input of F2 becomes H, and , the output of transistor false is inverter No.
R/S flip-flop F via F2.

Glue set input (F applied to the field, reset input (R
) yells at L. When the reset input of R/S flip-flop F becomes L, s When the reset input of F2 becomes H, R/S flip-flop
The S flip-flop F is set and its output becomes H, and sFt is reset and its output becomes L. When the output of F becomes HK, it is determined that the vehicle height is high, and the solenoid pulp 240 is driven and opened via the amplifier AMPI, thereby lowering the vehicle height.

(11) When the vehicle height changes from "high" to "medium/high", the output signal of the photosensor 101 changes from Bf)'-H to L. The counter COI is cleared, and the output terminal Q3 becomes L, and the flip-flops F and IF2 The set signal (S) becomes L. The reset signal (R) of F, , F2 does not change, and the output of Fl becomes H and the output of F becomes L to lower the vehicle height. However, the vehicle height becomes "high" and the counter COI vehicle height is “high” before counts a given clock pulse
When it becomes "junior high school" from - counter COI is cleared (
Similarly to iii), do not adjust the vehicle height.

(iii) When the vehicle height changes from "medium-low" to "medium-high", the output signal bfJ''hH of the photosensor 102 becomes L and resets the flip-flop F2.When the vehicle height is "medium-low", the output of the photosensor 102 changes from bfJ''hH to L. The signal S is high and resets the flip-flop F. - Rickshaw height “medium low”
In "middle/high", the output signal a of the photosensor 101 becomes L, and the human power S for setting flip-flop F and F2 becomes L, so the outputs of F and IF2 both become L, and the vehicle height is not adjusted.

(iv) When the vehicle height changes from "medium high" to "medium low", the output signal of the 7-position sensor 102 changes from L to H and resets the flip-flop F1. When the vehicle height is "medium high", the output signal of the photosensor 10j is L, and the flip-flop F2 is reset. -7 output signal a of the automatic sensor 101 in the case of ``-blade wheel height r medium-low'' and ``medium-high''
becomes L, and the setting force S of the flip-flop F, , F2 becomes L, so F,.

The outputs of F2 are both L, and the vehicle height is not adjusted.

(V) When the vehicle height changes from "low" to "medium-low", the output signal a of the photosensor 101 changes from H to L, the counter 001 is cleared, and the output terminal Q becomes L, and the flip-flops F, , F2 The set signal (S) becomes L.

F, , F, glue set signal (6) does not change (VO
Similarly, the output of F increases and the output of F becomes H, raising the vehicle height. However, the vehicle height became "A" and the counter COI
before the vehicle counts the predetermined clock pulses, the vehicle height is
The counter COI is cleared when it becomes "from town to r medium low".
Similar to V), do not adjust the vehicle height.

(vl) When the vehicle height becomes r(UK), the output signal a of the photosensor 101 becomes H, which is inverted by the transistor Q1, and the clear terminal of the counter COI becomes L.

When the clear terminal of C゛01 becomes L, clock pulse counting starts, and when a predetermined clock pulse is counted, the output terminal Q3 of the counter COI becomes H, and the set input S#'-H of the flip-flops F, F2. (set)
becomes. On the other hand, the output signal of the food sensor 102 becomes H, which is inverted by the transistor Q2, and applied to the flip-flop F and the glue setting input R, and the glue setting input becomes L, and the output of the transistor Q becomes the inverter N.
It is applied to the reset human power R of the flip-flop F through OT, and the glue set human power R becomes H. flip 7
0, when the glue set input becomes H and the reset manual power of F2 becomes L, the flip-flop F1 is reset and the output becomes L, and the flip-flop F2 is set and the output becomes H. When the output of F2 becomes H, amplifier AM
Relay 303 is driven via P2, power is supplied to motor 301, and compressor 302 is driven to raise the vehicle height.

Another embodiment of the invention will now be described with reference to FIGS. 5a-5e and FIG. 6. In this embodiment, three vehicle height detection means, photosensors 101, 102, and 103 are provided, and the combination of their output signals is "vehicle height r height".
, "medium-high", "medium-medium", "medium-low" and "low", and the output signals shown in Table 3 are outputted in response to busy vehicles and busy conditions, respectively.

5a to 5e show cross-sectional views of the vehicle height detector 100 along the line IC-IC, and FIGS. 5a, 5b, 5c, and 5d
In Figures 5 and 5e, the vehicle height is "low."

F medium low”, “medium medium”, “medium high” and “high” states □
shows.

FIG. 6 shows the vehicle height control device (211, 222). The delay circuit 211 has the same configuration as that of the embodiment shown in FIG. 4, and the vehicle height determination circuit 222 includes transistors Q3, Q4 and R/S flip-flops F, F4. - Vehicle height control (1) to &i0 shown in Table 3 will be explained below.

(1) When the vehicle height is high, the output signal aIJ''-■ of the photosensor 101, which is the first vehicle height detection means, is inverted by the transistor Q, and the clear terminal of the counter CO1 becomes L. When the clear terminal of COI becomes L, it starts counting clock pulses, and when a predetermined number of clock pulses are counted, the output terminal Q of counter CO1 becomes H.
The set input S'h of the R/S flip-flops F3 and F4 becomes H (set). On the other hand, the output signal of the second vehicle height sensor 102 is H.
is inverted by the transistor Q, and the set input of the 7-live flip-flop F becomes L, F is set, and the output becomes H. 7 Otose 1 which is the third vehicle height detection means,
: The output signal C of the sensor 103 is ゛・, :[・t), which is inverted by the transistor can, the reset input of the flip-flop F becomes H, F4 is reset, and the output becomes L. When the output of F becomes HK, the solenoid pulp 240 is driven via the amplifier AM.Pl to lower the vehicle height.

(11) When the vehicle height changes from "high" to "medium high", the output of the 7-wheel sensor 101 changes from H to L, and the counter COI
is cleared, the output terminal Q becomes L, and the set signal C) of the seven rib flops F and F becomes L.

The reset signals e) of F3 and F4 do not change, and similarly to (i), the output of F becomes H and the output of F becomes L, lowering the vehicle height. However, before the vehicle height becomes "high" and the counter CO1 reaches the predetermined clock pulse, the vehicle height becomes "high".
The counter COI is cleared when it becomes "junior high school" from
Like the iiJ, the vehicle height is not adjusted.

(+ii) 7 when the vehicle height changes from “medium-medium” to “medium-high”
The output signal of the auto sensor 102 changes from L to H, and the reset input of the flip-flop F becomes L. on the other hand·
, :'1゜ Vehicle height "middle"~□, ), flip-flop F3
And the reset human power R of F4 becomes H, F, and F
4 is reset and the output becomes L, and the set human power S becomes L, so the outputs of F and F4 both become L, and the vehicle height is not adjusted.

(:V) When the vehicle height is "medium", the outputs of photosensors 102 and 103 are. becomes L, and flip-flops F3 and F4 are reset. When F and F4 are reset, both outputs become L and vehicle height adjustment is not performed.

(V) When the vehicle height changes from "medium-medium" to "F-medium-low", the output signal of the 7-position sensor 103 changes from L to H, and the reset input of the flip-flop F4 becomes L. - When the blade wheel height is "medium", the reset human power R of flip-flops F3 and F becomes H, F3 and F4 are reset and the output becomes L, and the set human power S becomes L, so F
Both the outputs of F3 and F4 become L, and the vehicle height is not adjusted.

(vil) When the vehicle height changes from "low" to "medium-low", the output of the photo sensor 101 changes from H to L, and the counter COI
is cleared and the output terminal Q becomes L, and the set signal (S) of the block F and F becomes L. F.

and F4 reset signal (Kai does not change and F4 is the same as the axis)
The output of 3 increases, and the output of F becomes H, raising the vehicle height. However, if the vehicle height changes from "low" to "medium-low" before the counter COI counts the predetermined clock pulses, the counter COI will be cleared and the vehicle height adjustment will be performed in the same way as (V). Not performed.

(vl; When the vehicle height is r, the output signal a of the photosensor 101 becomes H, which is inverted by the transistor Q1, and the clear terminal of the counter CO1 becomes L.

When the clear terminal of C01 becomes L, the clock pins A/, X
When counting starts and a predetermined clock pulse is counted, the output terminal Q3 of the counter COI becomes H, and the manual setting S of the flip-flops F and F becomes H (set). On the other hand, the output signal of the food sensor 102 is inverted, and is inverted by the transistor Q3, so that the input of the flip-flop F becomes H, and F is set, and the output becomes L. The output signal C of the photosensor 103 is H, which is inverted by the transistor Q, the reset input of the flip-flop F4 becomes L, F4 is set, and the output becomes H. When the output of F becomes H, the amplifier AMP
2, relay 303°' is driven, power is supplied to motor 301, and compressor 302 is driven to raise the vehicle height.

Next, another embodiment of the present invention will be described with reference to FIGS. 1C to 1E and FIG. 7.

Photo sensors 101 and 102 produce outputs shown in Table 1 depending on the vehicle height. FIG. 7 shows a vehicle height adjustment control device (212, 220) which is the same as the vehicle height adjustment control device shown in FIG. This vehicle height adjustment control device includes a delay and time limit circuit 212 and a vehicle height discrimination gate circuit 2.
Consists of 20.

The delay and time limit circuit 212 is composed of a counter CO1 that determines the delay time, a counter CO2 that determines the upper limit of the drive time, an inverter NOTI, an AND gate AN3, and an AND gate N0R5, and a vehicle height determination gate circuit 220.
has the same configuration as that of the embodiment shown in FIG. 2. In delay and time circuit 212.

The output of the sensor 101 is the counter CO1, which is the photo sensor 1.
The output signal a of 01 is H (when the vehicle height is "medium", it is cleared and the output terminal Q is set to L. When Q becomes L, the output of the inverter/N0TI becomes L. CLE of recounter CO2
The AR terminal becomes H, and the output terminal Q2 becomes L. Therefore, the output of NOR5 becomes L, and the AND gate AN
The outputs of I and AN2 are both L, and the vehicle height is not adjusted. The output signal a of the photosensor 101 is L (vehicle height is "
When the signal becomes high or high, the counter COI counts clock pulses for a predetermined period of time and outputs the signal to the output terminal Q, similarly to the embodiment shown in FIG.

When the counter CO2 is reversed from L to H, the clearing of the counter CO2 is canceled and C0UNT ENABLE becomes H. At this time, the output terminal Q of the counter CO2 and the inverter N0T
Since the output of I becomes L, the output of N0R5 becomes H, and when the output signal of the photosensor 102 is H (
When b is L (vehicle height "low"), the relief pulp 240 is driven to lower the vehicle height.
Drive 02 to raise the vehicle height.

At the same time, AN3 is opened and a clock pulse is applied to the counter CO2, and CO2 starts counting the clock pulses.The drive of the relief pulp 240 or the compressor 302 continues for a long time, and the clock pulse is applied to the counter CO2.
2 counts a predetermined number of clock pulses or the vehicle height reaches the target vehicle height "Medium" K (Noa Game) N0R
Since either of the inputs of the gates N0R5 becomes H and the output of N0R5 becomes L, the outputs of the AND gates AN1 and AN2 both become L, stopping raising or lowering the vehicle height. Similarly, the AND gate AN3 is closed and no clock pulse is applied to the counter CO2. Therefore, when the counter CO2 counts a predetermined number of clock pulses and the vehicle height stops raising or lowering, the vehicle height becomes "medium" and the counter CO2
Do not adjust the vehicle height again unless it is reset.

Next, another embodiment of the present invention will be described with reference to FIGS. 8 and 9.

The vehicle height adjustment control device shown in FIG. 8 is constructed by implementing the vehicle height adjustment control device shown in FIG. 2 using a microcomputer MPU. The output signals of the photosensors 101 and 102 are applied to the input ports 01 and 602 of M rU, respectively, and the output signals of the photosensors 101 and 102 are applied to the output ports 11 and 612, respectively. An amplifier AMP2 for driving is connected.

The control operation of the MPU will be explained based on the flowchart of FIG.

First, clear the register R to be used (OK, set, enter ports 601 and 602, enter ports) 61
1 and 612 (output port)) Specify K to output port 1
1 and 612.

From input port 01,602 to photo sensor 101゜1
If the state of 02 is read and the two-person capo 601 is H, the vehicle height is "medium", so the output capo 611 and 612 are set to L, and the register R1 is cleared. If input port 01 is L, the vehicle height is "high" or "low", so the content of register R3, which is a register indicating the duration of vehicle height "high" or "high", is set to 1.
Update memory of the sum added to register R3, execute program timer to, check the contents of register R1 when time is over, and when it reaches a predetermined value, subtract 1 from the contents of register R1 and write the value to R4. (Update memory and enter capo)
Looking at the contents of 602, if it is H, the output port 11 is set to H and the relief valve is driven to lower the vehicle height, and if 602 is L, the output port 12 is set to H and the compressor 302 is driven.

FIG. 1O shows a control operation in which a function of setting an upper limit of the drive time is added to the control operation shown in FIG. 9. Register R2 is a register for determining the upper limit of the driving time, and monitors the driving time. The control operation is the same as that shown in FIG. 7 above.

As described above, according to the present invention, only the output signal of the first vehicle height detection means that generates the same level of vehicle height detection signal for vehicle heights "broad" and "i" is delayed, and then the vehicle height is By determining the circuit configuration, the circuit configuration can be simplified and the number of circuit elements can be reduced compared to conventional methods.Also, it can be configured using a microcomputer.
, , the operational flow can be simplified.゛4, Ili. □□Oh ゛゛, Figure 1a is a side view showing the installation status of the vehicle height detector, Figure 1
Figure b is a longitudinal sectional view of the vehicle height detector. Figure 1C, Figure 1d
The figure and FIG. 1e show the states of "high", "medium", and "I", respectively, on the IC-ICC line cross section of FIG. 1b. Figures 2, 4, and 6.

7 and 8 are circuit diagrams showing an embodiment of the vehicle height adjustment t++ control device of the present invention. 3a, 3b, 3c, and 3d are sectional views taken along the line 1c-rc in FIG. 1b, and show the vehicle height of the embodiment shown in FIG. 4.

"Medium high", "Medium (indicates Ll and "low" state. Fifth
Figure a.

FIGS. 5b, 5C, 5d, and 5e show vehicle heights of the embodiment shown in FIG.

FIG. 3 is a cross-sectional view showing "medium-high" and "high" states. 9th
The figure and FIG. 10 are for the microcomputer MP shown in FIG.
It is a flowchart showing the control operation of U.

10: Body frame 20: Link 30: De7 arencial gear 40: Axle: 1'.

100: Vehicle height detector 1oL102, 103: "7 Oto sensor (vehicle height detection means) 104: Bending 105: Light shielding plate 106:
Base 107: Printed circuit board 108 Two rotational axes 210.211: Delay circuit (delay means) 212 Two delay/time limit circuits (delay means) 220.221, 222:
Vehicle height discrimination gate circuit 240: Relief pulp 3o1
: Motor 302: Compressor 3o3: Relay 4
(10: Suspension system COI, CO2: Counter N
0TI, N0T2: Imperter ANI~AN3:
AND GATE N0RI~N0R5: NOAH GATE F
, ~F4: Clip 70 tube circuit MPU: Microcomputer start 2 diagram

Claims (1)

[Claims] (1) A vehicle height “high” higher than the target vehicle height and a lower vehicle height [
A vehicle height detector comprising at least two vehicle height detection means including a first vehicle height detection means that generates a vehicle height detection signal of the same level with respect to IN; 1, and a vehicle height determining means for determining the vehicle height based on a combination of the output signal of the delaying means and the signal from the other vehicle height detecting means. A vehicle height adjustment device comprising a vehicle height adjustment control device that adjusts the vehicle height based on the following. (2) The vehicle height adjusting device according to claim 1, wherein the delay means is a counter and the vehicle height detection signal from the first vehicle height detection means is connected to a clear terminal of the counter. (3) The vehicle height adjustment device according to claim 1, wherein the vehicle height adjustment control device is a microcomputer.