JPS6071312A - vehicle height adjustment device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vehicle height adjustment device that is capable of smoothly driving an overloaded compressor. A device has been proposed that raises and lowers the vehicle height by forming gas chambers that change the height of the vehicle and selectively supplying and discharging high-pressure air to each gas chamber. Normally, in a motorcycle, the load applied to the front fork is different from the load applied to the cushion, and the load on the rear cushion side is larger, so the force resisting the load on the rear cushion is set to be larger. Therefore, the gas pressure of the rear cushion is set higher than the pressure of the gas sealed in the gas chamber of the front fork and the pressure of the gas sealed in the gas chamber of the cushion.

Incidentally, only one compressor, which is a means for supplying high-pressure air to each gas chamber of the above-mentioned suspension system, is provided per vehicle. Therefore, when supplying high-pressure air to the gas chamber of the front fork and the gas chamber of the rear cushion, it is not possible to supply high-pressure air to the gas chambers of the front fork and the gas chamber of the rear cushion at the same time because the sealed gas pressures are different, so a switching pulp is installed in the air circuit to selectively supply them separately. I have to do it.

However, when high-pressure air is supplied to the gas chamber of the front fork after adjusting the vehicle height by supplying high-pressure air to the gas chamber of the rear cushion, which has a high sealed gas pressure, the interior of the air pipe is in a high-pressure state due to the previous vehicle height adjustment. As a result, a high load is placed on the compressor, making it difficult to drive the compressor, resulting in the problem that the compressor cannot be driven smoothly.

An object of the present invention is to provide a vehicle height adjustment device that uses a compressor to supply high-pressure air to raise the vehicle height, so that the compressor can be driven smoothly even when an overload is applied to the compressor, and even when the compressor has a small capacity. The purpose is to make it possible to adjust the vehicle height appropriately.

The present invention is characterized by increasing the vehicle height by selectively opening the front and rear switching electromagnetic valves to supply high-pressure air from a compressor to each gas chamber for vehicle height adjustment formed in the front and rear suspension systems of the vehicle. In a vehicle height adjustment device that includes a solenoid valve for venting to the atmosphere between a front/rear switching solenoid valve and the compressor, when supplying high pressure air to the gas chamber, the electromagnetic pulp for venting to the atmosphere is opened and the compressor is overloaded. This is because the compressor is configured to operate when the condition is low.

An embodiment of the present invention will be described in detail below based on the accompanying drawings.

FIG. 1 shows the configuration of a vehicle height adjustment device according to the present invention, and FIG.
The figure shows the configuration of the control device. In this embodiment, it is configured as a vehicle height adjustment device for a motorcycle.

In FIG. 1, the air circuit system will first be explained. Reference numeral 01 is a compressed air generator, which is composed of a compressor 2 and a dryer 3. 4 is a switching valve unit, and switching solenoid valve 5
, 6. The switching valve unit 4 connects the air pipe 7 leading to the compressor 2 of the compressed air generator 1 to
Under predetermined control, an air pipe 9 leads to a vehicle height adjusting gas chamber provided in the front forks 8, 8 or an air pipe 11 leads to a vehicle height adjusting gas chamber provided in the rear cushion 10.10. It has the function of selectively communicating with the That is, when the solenoid valve 5 opens, the air pipe 7 communicates with the air pipe 9, and when the solenoid valve 6 opens, the air pipe 7 communicates with the air pipe 11. In the figure, 12.1
3 is a three-way socket.

In the middle of the air pipe 7, that is, between the compressor 2 and the switching valve unit 4, there is a check valve 14 and a relief solenoid valve 15 that releases the high-pressure air to the atmosphere, which controls the pressure in the switching valve unit side of the air pipe γ. A pressure sensor 16 that can measure the pressure is provided. In this embodiment, check valve 1
4. The solenoid valve 15 and the pressure sensor 16 are integrally constructed as a unit.

Next, the electric circuit system will be explained. 17 is a control device.

As an element on the input side of the control device 17, as a detection means -
A vehicle height sensor 18, a voltage abnormality detection sensor 19, a side stand release detection sensor 20, a main stand release detection sensor 21, a brake operating state detection sensor 22, and the pressure sensor 16 are provided, and a return type auto start switch is provided as an operating means. A switch 24 and a manual up/neutral @down selection switch 25 are provided. On the other hand, on the output side of the control device 17, the aforementioned compressor 2,
It is equipped with a relief solenoid valve 15 and each solenoid valve 5, 6 forming the switching valve unit 4, and a pressure sensor 16 and a solenoid valve 5, as a display element.
6.15 A lamp 26 that alerts you when an abnormality occurs, a lamp 27 that flashes only during automatic vehicle height adjustment, and a lamp 27 that separately displays the internal pressure of each gas chamber of the front fork 8 and rear cushion 10. A pair of pressure digital indicators 28 are provided. In the figure, 29 is a power supply terminal, and 30 is a system start switch. The system start switch 30 is normally kept closed, and by opening and closing it as necessary, the entire system of the vehicle height adjustment device can be reset.

The block diagram in FIG. 2 shows a specific electric circuit of the control system. A CPU 31 exists in the center, and around the CPU 31 there are an input interface 32 for sensors, etc., a vehicle height sensor input interface 33, and an analog input interface 34 to exchange signals with various external sensors, operating means, and loads. , A/D converter 35,
Load drive output circuit 36, lamp output circuit 37, pressure data output circuit 38, display data interface 39
etc. will be provided. In the figure, numeral 40 denotes a display panel on which display elements are arranged.Next, the operation of the vehicle height adjustment device having the above structure will be explained. This operation is performed under the control of the CPU 31.

First, the vehicle height must be adjusted if the side stand and main stand are released, the brakes are intact, and the voltage is normal.

When these conditions are satisfied and the ignition key is turned on to start the system, the solenoid valves 5, 6, 15 and pressure sensor 16 are first inspected to see if they are normal or abnormal.

In other words, open the solenoid valve 15 for about 2 seconds to open the air pipe 7 to the atmosphere, and then measure the pressure inside the air pipe 7 with the pressure sensor 16. If the measured pressure is zero, the manual type The vehicle height is now in a state where it can be adjusted, and if it is zero, the lamp 26 is turned on to issue a warning and the operation of the entire device is stopped.Before the above steps, select the solenoid valves 5 and 6 as appropriate. A step is incorporated in which the pressures in the gas chambers of the front fork 8 and the rear cushion 10 are separately measured by the pressure sensor 16 and displayed on the digital display 28 respectively. Such a step can be incorporated as part of the processing flow, or can be provided as a separate routine with separate interrupt means. Furthermore, for example, an average value is used for the displayed pressure value.

This vehicle height adjustment device can perform manual and automatic vehicle height adjustment, and the auto start switch 23
Unless it is turned on, the operating state is manual mode.

According to manual vehicle height adjustment, the vehicle height at the front and rear of the vehicle body can be selectively and arbitrarily changed under certain limits according to the load applied to the vehicle body. That is, in order to adjust the vehicle height at the front of the vehicle body, the solenoid valve 5 can be opened by setting the switch 24 to the front side, and on the other hand, to adjust the vehicle height at the rear right μ of the vehicle body, the switch 24 is set to the rear side. By setting @IJ, the solenoid valve 5 (or 6) opens and the compressor 2'75: (
The high-pressure air is supplied to each gas chamber through the air pipes 7, 9 (or 11), increasing the pressure in the gas chamber and raising the vehicle height. However, the upper limit for the pressure in the gas chamber is (
For example, the front fork is set at 1°Q My/c + A, and the rear cushion is set at 6.4 Kt/c)75, and the vehicle height must be adjusted below the upper limit.

The pressure state during adjustment is measured by the pressure sensor 16 at predetermined time intervals, and is displayed on the digital display 28 each time.
The driver can visually check the change in pressure in each gas chamber via the digital display 28, and can therefore adjust the vehicle height appropriately at will. On the other hand, the switch 25
When Rdownj is set, the solenoid valve 5 (or 6) opens and the relief solenoid valve 15 opens intermittently at regular time intervals, the high pressure air in each gas chamber is gradually discharged, and the vehicle height is gradually lowered. In this case as well, a lower limit is set; for example, in the case of the front fork 8, 0. OKPlCr&, and for the rear cushion 10, OM, /C2. The pressure state during adjustment is measured by the pressure sensor 16 in the same manner as described above, and the pressure value is displayed on the digital display 28. The driver sees this and adjusts the vehicle height.

In the above, when the switch 25 is in the neutral position, the vehicle height adjustment is not performed, and when the switch 25 is set in the neutral position while the vehicle height is being adjusted, the adjustment is stopped. Further, when the switch 25 is in either rupJ or rdownj, the vehicle height adjustment is determined in the initially selected state and does not change even if the switch 24 is switched back and forth. When the vehicle height adjustment is completed, solenoid valve 5 (or 6
) is closed, and then the solenoid valves 5 and 6 are closed as described above.
15 and a pressure zero test regarding the performance of the pressure sensor 16 is performed. A zero pressure test is performed every time a vehicle height adjustment is made.

As mentioned above, since only one compressor 2 is installed in the vehicle, the height adjustment of the front and rear of the vehicle is performed separately. The foregoing front/rear switch 24 is used to select this. In a normal vehicle height adjustment operation, after raising the vehicle height by filling the gas chamber of the rear cushion 10, which is subject to a large load, with high pressure air, the switch 24 is turned to adjust the vehicle height on the front fork 8 side. Make it second. In such a case,
When driving the compressor 2 to supply high-pressure air to the gas chamber of the front fork 8, control is performed to temporarily open the relief solenoid valve 15 for opening to the atmosphere. By doing this, the pressure in the air circuit increases due to the vehicle height adjustment on the rear side of the vehicle, and even if the compressor 2 is in a state of overcapacity, the internal pressure is lowered by opening the solenoid pulp 15, so the compressor 2 smooth life startup can be performed.

The present invention can also be applied to the case where the vehicle height is increased when the compressor 2 is driven as described above, and furthermore, it can be always performed when the compressor 2 is driven.

Automatic vehicle height adjustment is performed to automatically adjust the vehicle height to an appropriate height while the vehicle is running or stopped. In this vehicle height adjustment device, automatic vehicle height adjustment is applied only to the rear part of the vehicle body, that is, the rear cushion 10, and when the auto start switch 23 is turned on and the automatic vehicle height adjustment is performed. . According to automatic vehicle height adjustment, a reference vehicle height that is an appropriate vehicle height is determined in advance, and based on the signal detected by the vehicle height sensor 18 based on this reference vehicle height, the vehicle height is determined to be "OK".
", rHIGHJ, rLOW", etc. are made by the control device, and the required vehicle height adjustment is performed depending on the situation. and compressor 2 is rLOW
When the judgment of J is made, the vehicle is driven to raise the vehicle height, but the solenoid valve 15 can also be opened at this time.

As described above, the present invention is of course applicable to vehicle height adjusting devices used in other types of vehicles such as automobiles, and vehicle height adjusting devices using gases other than air and electromagnetic valves other than solenoid valves.

As is clear from the above description, according to the present invention, in a vehicle height adjustment device that needs to be driven even when the compressor is in an overcapacity state, the compressor can be driven smoothly, and the This makes it possible to smoothly and quickly adjust the vehicle height, and even with a small capacity compressor, the vehicle height can be adjusted appropriately.

[Brief explanation of the drawing]

Fig. 1 11 is a configuration diagram of the vehicle height adjustment device according to the present invention, Fig. 2
The figure is a block circuit diagram of the control device. In the drawing, 2 is a compressor, 4 is a switching valve unit, 5.6 is a switching solenoid valve, 8 is a front fork, 10 is a rear cushion, 15 is a relief solenoid valve, 16 is a pressure sensor, and 17 is a control device.

Claims (1)

[Claims] The front and rear switching solenoid valves are selectively opened to supply high-pressure air from the compressor to each gas chamber for vehicle height adjustment formed in the front and rear suspension systems of the vehicle, increasing the vehicle height. In the vehicle height adjustment device comprising an electromagnetic pulp for venting to the atmosphere between the gas chamber and the compressor, the compressor is operated while the electromagnetic valve for venting to the atmosphere is opened when high pressure air is supplied to the gas chamber. A vehicle height adjustment device featuring: