JPS61291283A - Regulator for height of car of 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 Application Field) The present invention relates to a vehicle height adjustment device for a motorcycle. The present invention relates to a vehicle height adjustment device for a motorcycle that does not frequently operate near a certain value.

(Prior Art) Various vehicle height adjustment devices have been proposed for motorcycles using air suspension, which lower the vehicle height by removing air when the vehicle is stopped, and raise the vehicle height by injecting air when the vehicle is running.

For example, in the Japanese Patent Publication No. 59-32356 ``Vehicle Height Adjustment Device for Motorcycles'', when the running speed increases above a specified value, the pressure of the air sealed in the air suspension is increased, and when the speed falls below the specified value, the pressure of the air sealed in the air suspension is increased. A device has been disclosed that automatically adjusts the vehicle height according to the traveling speed by lowering the pressure of the air flowing into the vehicle.

(Problem to be solved by the invention) However, with the above-mentioned vehicle height adjustment device, the vehicle height was raised when the traveling speed exceeded a certain specified value, and lowered when the traveling speed was below the set value. When the vehicle runs at a speed close to this value, there is a problem in that the vehicle height increases and decreases frequently, resulting in poor running stability.

An object of the present invention is to provide a motorcycle that improves running stability by setting the vehicle speed at which the vehicle height is raised and lowered within a certain range, thereby preventing frequent operation near the set value. The purpose of the present invention is to provide a high-adjustment device.

(Means for Solving the Problems) In order to achieve the above object, the vehicle height adjustment device for a motorcycle according to the present invention opens the intake valve and injects air from a pressure source into the air suspension to adjust the vehicle height when the vehicle is traveling. Raise the
A vehicle height adjustment device for a motorcycle that lowers the vehicle height by opening an exhaust valve to remove air from the air suspension when the motorcycle is stopped, and a vehicle speed sensor that detects the traveling speed of the motorcycle.

When the output of the vehicle speed sensor reaches a vehicle height increasing vehicle speed during acceleration, the intake valve is opened to increase the vehicle height, and during deceleration, the output of the vehicle speed sensor is set to a value lower than the vehicle height increasing vehicle speed. It also includes a vehicle height control circuit that opens the exhaust valve to lower the vehicle height when the vehicle speed reaches a lower vehicle height.

(Example) Hereinafter, the present invention will be described in detail with reference to the drawings and the like.

FIG. 1 is a block diagram showing an embodiment of a vehicle height adjustment device for a motorcycle according to the present invention, and FIG. 2 is a diagram showing an air suspension used in the device according to the embodiment.

In FIG. 1, 11 is a compressor, 12 is a check valve, 13 is a relief valve, 14 is an accumulator, 15 is a pressure switch, and 16 is a relief valve.

The compressed air from compressor 1 is supplied to check valve 1.
2 to the accumulator 14. The accumulator 14 is a container for storing air under pressure, and the pressure inside the container is detected by a pressure switch 15. Based on the output of the pressure switch 15, the controller 4 controls the compressor 11. There is.

21 is a vehicle speed sensor, 22 is a vehicle height sensor, 23 is a pressure sensor, 31 is an intake valve, 32 is an exhaust valve, 4 is a controller, and 5 is an air suspension.

The vehicle speed sensor 21 is a sensor that detects the traveling speed of a motorcycle. The vehicle height sensor 22 is a sensor that detects the seat height of the vehicle body, so-called vehicle height, and here detects the displacement of the air suspension 5. The pressure sensor 23 is a sensor that detects the pressure of air supplied to the air suspension 4. The outputs of these sensors 21 to 23 are connected to the controller 4.

The intake valve 31 is a valve for injecting compressed air from the accumulator 14 into the air suspension 5, and the intake valve 32 is a valve for exhausting the compressed air from the air suspension 5. Intake valve 31. The exhaust valve 32 is opened and closed by a control signal from the controller 4.

In Figure 2, 50 is the rear suspension.

51 is the swing arm, 52 is the bush rod.

53 is a bracket, and 54 is a bell crank.

In this embodiment, the air suspension 5 that is controlled is only the rear suspension 50. This is because if air is controlled in the front four, the entire device becomes complicated and costs increase, and if air is filled, the friction of the oil seal increases, which may reduce ride comfort and running stability. This is because there is.

Next, the operation of the vehicle height adjustment device for a motorcycle according to the present invention will be explained.

FIG. 3 is a waveform chart for explaining the operation of the embodiment of the vehicle height adjustment device for a motorcycle according to the present invention.

Assume that the motorcycle that was stopped at time to starts to move and accelerates at time tl. Assuming that the output of the vehicle speed sensor 21 reaches the vehicle height increasing vehicle speed Vup at time tl, the controller 4 opens the intake valve 31 to inject air into the air suspension 5 to raise the vehicle height.

The vehicle height is once set to the loosely adjusted vehicle height H1, and then further adjusted to the optimum vehicle height H2 when the vehicle is running at a constant speed at time t3. The state of the suspension 5 at this time is monitored by the vehicle height sensor 22 or the pressure sensor 23, and the controller 4 controls the opening and closing of the intake valve 32 based on their outputs.

Assume that the vehicle is braked and begins to decelerate at time t4.

The output of the vehicle speed sensor 21 is the vehicle height decreasing vehicle speed V at time t5.
If the vehicle is down, the controller 4 opens the exhaust valve 32 to exhaust air from the air suspension 5, thereby lowering the vehicle height. Vehicle height lowering vehicle speed V down is
The vehicle height increase vehicle speed vup is set lower than the vehicle speed vup by a certain value. Therefore, the vehicle height lowering vehicle speed Vd.

Even if the vehicle speed increases again near wn, the vehicle height increases and the vehicle speed ■up
If the height is not reached, the vehicle height will not be raised.

The vehicle height is first lowered to just below the vehicle height at which the vehicle is stopped, and once it is confirmed that the vehicle has stopped, it is further lowered to the height at which the vehicle is at rest.

(Effects of the Invention) As explained in detail above, according to the present invention, by setting the vehicle speed at which the vehicle height is raised and lowered within a certain range, the vehicle height does not operate frequently near the set value. It is safer to drive.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of a vehicle height adjustment device for a motorcycle according to the present invention, and FIG. 2 is a diagram showing an air conditioner 7 and a pensicon used in the same embodiment device. FIG. 3 is a waveform chart for explaining the operation of the embodiment of the vehicle height adjustment device for a motorcycle according to the present invention. 11... Compressor 12... Check valve 13... Relief valve 14... Accumulator 15... Pressure switch 16... Relief valve 21... Vehicle speed sensor 22... Vehicle height sensor 23
...Pressure sensor 31...Intake valve 32...Exhaust valve 4.
... Controller 5 ... Air suspension 50 ... Rear suspension 51 ... Swing arm 52 ... Bush rod 53 ... Bracket 54 ... Bell crank patent applicant Suzuki Motor Co., Ltd. agent Patent attorney I Noro Hisashi Figure 2

Claims (1)

[Claims] A vehicle height adjustment device for a motorcycle that opens an intake valve when driving and injects air from a pressure source into the air suspension to raise the vehicle height, and when stopped, opens an exhaust valve to remove air from the air suspension and lower the vehicle height. A vehicle speed sensor detects the running speed of the motorcycle, and when the output of the vehicle speed sensor reaches a vehicle height increasing vehicle speed during acceleration, the intake valve is opened to increase the vehicle height, and when the vehicle speed is decelerated, the vehicle speed sensor is activated. and a vehicle height control circuit that opens the exhaust valve to lower the vehicle height when the output reaches a vehicle height lowering vehicle speed set to a value lower than the vehicle height increasing vehicle speed. Vehicle height adjustment device for motorcycles.