JPH0478484B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pressure data processing method for a vehicle height adjustment device capable of performing manual and automatic vehicle height adjustment.

Vehicle height adjustment devices are installed in vehicles such as automobiles and motorcycles, and adjust the vehicle height by operating a pressure source or exhaust valve to supply and discharge high-pressure air to a vehicle height adjustment gas chamber provided in a suspension system. It is possible to maintain an appropriate ground clearance by changing the height arbitrarily or constantly.

By the way, such a vehicle height adjustment device is generally capable of performing manual vehicle height adjustment and automatic vehicle height adjustment based on the operation of a selection means. Normally, in manual vehicle height adjustment, the internal pressure state in the gas chamber is detected by a pressure sensor, the pressure data is processed by a control device consisting of a computer, and the pressure information is displayed on an attached digital pressure display. The driver adjusts the pressure according to his/her preference while viewing this pressure information, thereby adjusting the vehicle height. Therefore, in manual vehicle height adjustment, it is necessary that the vehicle height adjustment device be able to start and stop in response to the operator's senses and to be responsive. On the other hand, in automatic vehicle height adjustment, when the vehicle height changes due to an increase or decrease in load due to loaded luggage, etc., the vehicle height data is transmitted to the control device based on the vehicle height data provided by the vehicle height sensor. The vehicle height is automatically adjusted so that the vehicle height matches the standard vehicle height.
In this case as well, during vehicle height adjustment, the internal pressure state of the gas chamber is detected by the pressure sensor and displayed on the pressure display after predetermined data processing. Therefore, in such an automatic vehicle height adjustment device, since the vehicle height usually fluctuates frequently during driving, it is preferable that the response is slow, as opposed to a manual vehicle height adjustment device.

The inventor of the present invention has created the present invention in order to effectively solve the above-mentioned needs for a vehicle height adjustment device.

An object of the present invention is to execute a data processing method according to the manual type or automatic type in a vehicle height adjustment device capable of performing manual type vehicle height adjustment and automatic type vehicle height adjustment. On the other hand, in the case of automatic vehicle height adjustment, the amount of data detected is increased to increase the accuracy of the displayed pressure value, and accurate adjustment is performed while reducing responsiveness. It's about making it happen.

The feature of the present invention is that manual and automatic vehicle height adjustment can be selectively performed, and when adjusting the vehicle height, the internal pressure of the vehicle height adjustment gas chamber is measured as an average value and displayed on the display. In the adjustment device, manual vehicle height adjustment shortens the time interval for calculating the above average value and calculates the average value with less pressure data, while automatic vehicle height adjustment shortens the time interval for calculating the above average value and calculates the average value using a large amount of pressure data. The reason is that the average value is calculated.

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

FIG. 1 shows a configuration diagram of a vehicle height adjustment device according to the present invention, and FIG. 2 shows a system diagram of the same adjustment device. In this embodiment, it is configured as a vehicle height adjustment device for a motorcycle.

In FIGS. 1 and 2, reference numeral 1 denotes a compressed air generator, which is comprised of a compressor 2 that compresses atmospheric air to generate high-pressure air, and a dryer 3 that removes moisture from the high-pressure air. Reference numerals 4 and 4 indicate front forks at the front of the vehicle, and 5 and 5 indicate rear suspensions at the rear of the vehicle, each of which has a gas chamber (not shown) formed therein that expands and contracts its length in the axial direction to change the vehicle height. ing. The compressed air generator 1 and the gas chambers of the front forks 4, 4 and the rear suspensions 5, 5 are connected by an air pipe 6, and there is a part in the middle of the air pipe 6 as shown in the figure. A control valve unit 13 is provided which includes solenoid valves 7 and 8 which are front and rear switching valves, a relief solenoid valve 9 which is an exhaust valve for opening to the atmosphere, a pressure sensor 10, a pressure limiter 11, and further includes a check valve 12. .

In the above configuration, the compressor 2 and the solenoid valves 7, 8, and 9 are operated based on commands from a control device 14 composed of, for example, a CPU. That is, by opening the solenoid valve 7 and closing the solenoid valve 8, the compressor 2
When activated, high-pressure air is supplied to each gas chamber of the front forks 4, 4 to raise the vehicle height at the front of the vehicle, and the solenoid valves 7, 8 are kept in the same state as above, and the relief solenoid valve 9 is activated. If you open and close the front forks 4 and 4 intermittently,
High-pressure air is gradually released from each gas chamber, lowering the vehicle height. Conversely, if the solenoid valve 8 is opened, the solenoid valve 7 is closed, and either the compressor 2 or the relief solenoid valve 13 is operated, high-pressure air is supplied and discharged to the gas chambers of the rear suspensions 5, 5, and the vehicle height at the rear of the vehicle is increased. Adjustments can be made. Note that when the vehicle height is not adjusted, both the solenoid valves 7 and 8 are closed, the compressor 2 is stopped, and the relief solenoid valve 9 is in a closed state.

Generally, the loads applied to the front and rear parts of a vehicle are different, and therefore the pressure settings of the high-pressure air supplied to each gas chamber are also different between the front and rear parts. Therefore, the vehicle height adjustment at the front and rear of the vehicle is performed separately, and the solenoid valves 7 and 8 are used to select the front and rear.
It is.

Regarding the vehicle height adjustment device having the above configuration, the manual/auto selection switch 15,
Operating means such as a manual front/rear selection switch 16, a manual up/neutral/down selection switch 17, a vehicle height sensor 18 that outputs vehicle height information, a brake sensor 19 that detects the brake state, and the internal pressure of the gas chamber of the front fork. and a display 21 that digitally displays the internal pressure of the gas chamber of the reaction. The output signals from each operating means, the vehicle height sensor 18, and the brake sensor 19 are sent to the control device 14.
The pressure data obtained from the pressure sensor 10 at the time of vehicle height adjustment is processed in the control device 14 and the pressure value obtained is output and displayed on the displays 20 and 21.

The vehicle height adjustment device becomes operable when other requirements such as that the brakes are not applied are satisfied based on a signal given from the brake sensor 19. The vehicle height adjustment method is manual/
The auto selection switch 15 allows manual vehicle height adjustment or automatic vehicle height adjustment. In the case of manual vehicle height adjustment, select either front side or rear side with switch 16, select either up or down with switch 17, and change the pressure display on indicators 20 and 21. The driver can adjust the vehicle height to his or her preference under certain pressure limits while visually checking the vehicle height. On the other hand, in the case of automatic vehicle height adjustment, the vehicle height is adjusted to the standard vehicle height based on the vehicle height information output from the vehicle height sensor 18 such as predetermined "OK", "HIGH", "LOW", etc. When the vehicle height changes, the vehicle height is always adjusted to maintain an appropriate standard vehicle height ("OK" state). In this case, the adjustment target is only the rear side, and the driver himself cannot be involved in adjusting the vehicle height.

In both the manual type and automatic type, it is the control device 14 that directly issues a control command signal to the object to be controlled. Not only in the manual type, but also in the automatic type, the control device 14 inputs an analog signal related to the pressure in the gas chamber from the pressure sensor 10 during vehicle height adjustment, and uses this signal at regular intervals. Pressure information is obtained by reading pressure data and taking the average value over a predetermined period of time.

In the case of manual vehicle height adjustment, data is processed as follows. In other words, the pressure values displayed on the indicators 20 and 21 are based on changes in the internal pressure of each gas chamber in order to adjust the pressure to the desired pressure to adjust the vehicle height on the front and rear sides according to the passenger's preference. It must be immediately responsive to By doing so, the compressor 2 or the relief solenoid valve 9 can be immediately stopped by looking at the pressure display values on the indicators 20 and 21, and the internal pressure of the gas chamber can be set in accordance with the passenger's wishes. Moreover, it becomes possible to make fine adjustments.
Therefore, in order to match the actual pressure in the gas chamber with the pressure displayed on the indicators 20 and 21, the averaging time is shortened in the process of calculating the average value of the pressures. This allows pressure information to be generated quickly using a small amount of pressure data, reducing the difference between displayed pressure and actual pressure, and achieving quick response.

On the other hand, in the case of automatic vehicle height adjustment, the vehicle height adjustment itself is performed based on vehicle height information from the vehicle height sensor 18, and the pressure information from the pressure sensor 10 is not involved in the vehicle height adjustment. The pressure information from the pressure sensor 10 is used only to show the passenger what the internal pressure of the gas chamber is after the vehicle height adjustment is completed. Therefore, automatic vehicle height adjustment does not require quick response in processing pressure data, but rather requires accurate pressure value display. Therefore, in the process of calculating the average value, the averaging time is increased and the number of data is increased to generate accurate pressure information. According to this, the vehicle is not affected by pulsation or the like caused by the displacement of the rear action 5 during running.

Although the above embodiment describes a pneumatic vehicle height adjustment device for a motorcycle, the present invention can be applied to various vehicle height adjustment devices.

As is clear from the above description, the present invention provides a vehicle height adjustment device that can selectively perform manual and automatic vehicle height adjustment and can also display the pressure in the gas chamber during vehicle height adjustment. Such data processing is performed depending on the manual type or the automatic type, and the manual type has the advantage of being able to exhibit quick response, while the automatic type has the advantage of being able to perform accurate measurement and display.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of a vehicle height adjustment device according to the present invention,
FIG. 2 is a system diagram of the vehicle height adjustment device. In the drawing, 2 is a compressor, 4 is a front fork, 5 is a rear action, 7 and 8 are solenoid valves for front/rear switching, 9 is a relief solenoid valve for opening to the atmosphere, 10 is a pressure sensor, 14 is a control device, and 18 is a vehicle height sensor. , 20 is a front pressure indicator, and 21 is a rear pressure indicator.

Claims (1)

[Claims] 1 In a vehicle height adjustment device that can selectively perform manual and automatic vehicle height adjustment, and that measures the internal pressure of the vehicle height adjustment gas chamber as an average value and displays it on a display when adjusting the vehicle height, manual vehicle height adjustment In the adjustment, the time required to obtain the above average value is shortened and the average value is obtained using less pressure data, while in the automatic vehicle height adjustment, the time required to obtain the above average value is lengthened and the average value is obtained using a large amount of pressure data. A pressure data processing method for a vehicle height adjustment device.