JPS6078884A - Car speed response type car height adjusting type motorcycle - 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 (Industrial Field of Application) The present invention provides an automatic motor vehicle equipped with a mechanism that automatically adjusts the vehicle height of the vehicle and the tilt angle of the front vehicle to appropriate values according to the vehicle speed. (Regarding bi.

(Prior Art) Conventionally, vehicle height adjustment for O-1 to P-I was performed by changing the height of the cushion mechanically or by increasing/decreasing the pressure of fluid. At first, these vehicle height adjustments were made by manual IJJ based on the type of road the vehicle was riding on, for example paved or unpaved, or the rider's weight.

However, the above adjustments are made exclusively by mechanics and cannot be easily performed by ordinary riders.Therefore, it was hoped that a vehicle height control device would be invented so that even ordinary riders could easily make these adjustments. 8480).

However, the above-mentioned vehicle height adjustment is performed only when the motorcycle is stopped, and cannot be adjusted depending on the driving condition while the motorcycle is running. However, when considering the actual running of a motorcycle, it is necessary to adjust the vehicle height based on not only the above-mentioned static conditions such as road conditions and rider conditions, but also dynamic conditions such as the constantly changing running speed. That is, the forces applied to the front and rear cushions differ greatly between high-speed and low-speed driving. When driving at high speeds, air resistance applied to the front reduces the load on the front wheels and increases the load on the rear wheels. Therefore, even when there is no disturbance from the wheels, the front cushion will stretch and the rear cushion will contract, compared to a stationary state, and the motorcycle will be in a forward-uphill state. This tendency becomes stronger as the speed increases, and not only increases running resistance but also greatly reduces running stability at high speeds.

(Object of the Invention) In view of the above-mentioned drawbacks, the present invention adopts pneumatic type cushions for the front and rear cushions, and uses a control device to supply air to the cushions from an air compressor, or to supply air to the cushions. By releasing ! 'F! To provide a motorcycle in which an appropriate vehicle height and longitudinal inclination angle of the vehicle body can always be obtained depending on the speed.

(Structure and operation of the invention) As shown in FIG. 1, which is a block diagram illustrating the gist of the invention, the present invention detects the vehicle speed by means of a vehicle speed detecting means attached to the output shaft of the engine 1-. The value of the vehicle speed is input to the control device, and the control device looks up the control pressure values of the front cushion 2 and rear cushion 3 corresponding to the vehicle speed from a data table stored in advance based on the input, and then The actual pressure of the cushion 2.3 is detected by a pressure detection means attached to the pneumatic circuit, the detected value is input to the control device, and compared with the control pressure value, the air compressor and solenoid valve are controlled as necessary. do,
The actual pressure is adjusted to be equal to the control pressure value, so that the optimal vehicle height and longitudinal inclination angle of the vehicle body for the vehicle speed can always be obtained.

Embodiments of the present invention will be described below with reference to the drawings.

Figure 2 is a configuration diagram showing the configuration of an embodiment of the present invention;
Figures (a), (b), and (c) are flowcharts showing the vehicle height adjustment process of the present invention.

In the figure, 1 is a vehicle speedometer as a vehicle speed detection means, 2 is a front cushion, 3 is a rear cushion, 4 is a three-way solenoid valve, 5 is a three-way joint, and 6 is a three-way solenoid valve. , 7 is a two-way (ON-OFF) type solenoid valve, 8 is a pressure gauge as pressure detection means, 9 is an air compressor, 10 is an A/D converter, and 11 is a control device such as a microcomputer. . And front cushion 2
and the rear cushion 3 is a three-way solenoid valve 4 for branching.
, a two-way solenoid valve 7 for air IF circuit cutoff, and a three-way solenoid valve 6, one of which is open, connected to the air compressor 9 by pneumatic piping. ing. In addition, a pressure gauge 8 is installed between the solenoid valve 4 for branching and the solenoid valve 7 for cutting off the pneumatic circuit via a three-way joint 5 (=J), and the speed gauge 1 is connected to the output shaft of the engine unit or Attached to the axle.-Sumo wrestler f!a rl: +Speed meter 1 and pressure meter 8 are A/D converter 10
It is electrically connected to the microcomputer 11 via 1. A solenoid valve 4.6.7 and an air compressor are also electrically connected to the microcomputer 11. Although not shown in the figure, the microcomputer 11 mainly includes a microprocessor 1la and a memory 1a.
1b and an interface 11c.

The vehicle height adjustment mechanism, which is connected by the pneumatic piping and electrical wiring, functions as follows.

In other words, the number 4n of the A-log suspension detected by the vehicle speedometer 1 is A/
The signal is converted into a digital signal by the D converter 10 and input to the microcomputer 11. The above microcomputer 1
The vehicle speed Vn input in 1 is measured 10 times per unit time,
The microprocessor 17a calculates the average vehicle speed n for that unit time.
Once calculated, the solenoid valve 7 for cutting off the air circuit is closed.
At the same time, the microcomputer 11 issues a command to operate the solenoid valve 4 so that the rear cushion 3 and the pressure gauge 8 are connected.
issued by. Thereafter, an analog signal indicating the actual pressure of the rear cushion from the pressure gauge 8 is converted into a digital signal by the A/D converter 10 and inputted to the microcomputer 11. At this time, the input of the actual pressure is
At the same time, flag C=0 is inputted so that it can be recognized that it is the same. Then, a table lookup is performed based on the average vehicle speed 11 calculated above from a data table (P-table) indicating pressure values corresponding to vehicle speeds stored in the memory 11b of the microcomputer 11 as data in advance to find the corresponding one. Control pressure value (pl
, Pfn and Pα> and compare the detected actual pressure P+ of the rear cushion 3. If the detected actual pressure P1 of the rear cushion 3 is insufficient, the air compressor 9 and the rear cushion The electronic valves 6 and 7 are operated so that the air compressor No. 3 is connected, and the air compressor (No. 9) is started. Then, the actual pressure P1 of the rear cushion 3 is repeatedly measured, and the actual pressure P1 is
When the control pressure value reaches a certain allowable range (Prn+Pα), a command is given to close the solenoid valve 7, the circuit between the air compressor 9 and the rear cushion 3 is closed, and the air compressor 9 is stopped. If the pressure exceeds the control pressure value prn, the air compressor tree 9 is stopped and the solenoid valve 6 is activated to release the rear cushion 3 into the atmosphere.
The process of adjusting the control pressure to the above control pressure value Pro while releasing air is repeated until the control pressure value reaches a certain allowable range (p
rn+Pα), the solenoid valve 7 is operated to close the pressure adjustment of the rear cushion 3.

On the other hand, the first detected actual pressure P1 is the control pressure](a
If it exceeds Prn, the detected IC actual pressure P
1 is within a certain allowable range (prn+pα) of the control pressure value, and if it is within the certain allowable range (P ro + pα), the pressure adjustment of the rear cushion 3 is completed. In addition, if the above-mentioned certain tolerance range (prn+pα) is exceeded, the solenoid valve 7 is operated to release the rear cushion 3 into the atmosphere.
Detection of the actual pressure P1 is repeated while releasing air,
The actual pressure P+ is within a certain allowable range of the control pressure value (Prn+P
When α) is reached, a command is given to close the solenoid valve 7, and the pressure adjustment of the rear cushion 3 is completed.

When the above series of operations, that is, pressure adjustment of the rear cushion 3, is completed, it is determined whether the series of processes starts adjusting the front cushion 2 next or ends the adjustment of both cushions based on the value of 7 lag C. be judged. That is, when C=0, it indicates that only the adjustment of the rear cushion 3 has been completed, and then the adjustment of the front cushion 2 is started. In such a case, first close the solenoid valve 7, then switch the branch solenoid valve 4 from the reaction 3 side to the front cushion 2 side, connect the front cushion 2 and the pressure gauge 8, and set the control pressure of the rear cushion 3 (6P + 11 is replaced with the control pressure value pfn of the freon 1 to cushion 2, and then a flag value C=1 is set indicating that the control process is applied to the front cushion 2.Subsequently, the actual pressure P2 of the front cushion is set. is read by the pressure gauge 8, and the actual pressure P2 is compared with the control pressure value pfn, etc. Control proceeds according to the same control process as in the case of the rear cushion 3 described above. When the adjustment process is completed, a flag value C is determined, which determines whether the series of adjustment processes that have been completed are for the rear cushion 3 or the front cushion 2.

That is, if C=1 at this time, it indicates that the pressure adjustment of the rear cushion 3 and the front 1 to cushion 2 has been completed, and -F indicates the number of times the vehicle speed has been read.
N is reset to N=0, and the vehicle height adjustment is completed. The one-cycle vehicle height adjustment process described above is always repeated at a constant rate, and the vehicle height and longitudinal inclination angle are adjusted to be the most appropriate for the vehicle speed at that time. Note that one cycle of the series of vehicle height adjustment processes described above is performed in seconds.

Further, although the above control is performed using a microcomputer, it is of course possible to use a control device of other means. Furthermore, depending on the type of solenoid valve selected, it is also possible to easily perform the same operation as described above with a single solenoid valve.

<Effects of the Invention> As explained above, the motorcycle according to the present invention always automatically obtains the vehicle height and longitudinal inclination angle of the vehicle body that are adapted to the vehicle speed, so that the running stability at high speeds is superior to that of conventional motorcycles. At the same time, it can be used as a comfortable motorcycle by lowering the air pressure in the cushion at low speeds.

As described above, the present invention automatically adjusts the vehicle height and vehicle body to the optimum inclination angle depending on the speed, so both experienced riders and relatively inexperienced riders can safely drive on the highway. becomes possible.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the structure of the vehicle height adjusting means which is the gist of the present invention, FIG. 2 is a block diagram showing the structure of the vehicle height adjusting means according to an embodiment of the present invention, and FIG. Figure 3 (a) < b) (
c> is a flowchart showing the process of adjusting the vehicle height. 1...Vehicle speedometer, 2...Front cushion, 3...
・Rear cushion, 4.6.7... Solenoid valve, 5...
Three-way joint, 8... Pressure gauge, 9... Air compressor, 10... A/D converter, 11... Control device.

Claims (1)

[Claims] In a motorcycle that adopts pneumatic cushions for the front cushion and rear cushion, there is provided a detection means for detecting the vehicle speed of the motorcycle, a detection means for detecting the air pressure of a cylinder for adjusting the vehicle height, and a detection means for detecting the air pressure of a cylinder for adjusting the vehicle height, and a detection means for detecting the vehicle speed corresponding to the detected vehicle speed. Pneumatic front and rear cushions that raise and lower the height of the motorcycle; an air compressor that supplies air to the front and rear cushions; One or more solenoid valves are used to adjust or branch the air pressure of the vehicle, and the front and The control pressure value of the rear cushion is looked up from a pre-stored data table, compared with the actual pressure of the cushion detected by the detection means, and air is supplied so that the actual pressure is equal to the control pressure value. Alternatively, a vehicle speed-responsive vehicle height adjustable motorcycle characterized by being equipped with a vehicle height adjustment mechanism consisting of a control device P, etc., which commands the air compressor and solenoid valve to discharge the air.