JPH04121294A - Height adjusting device for motorcycle - Google Patents

Abstract

PURPOSE:To perform proper height adjustment without using a vehicle speed sensor by adjusting the time constant of an integrating circuit with the output of a stop state judging circuit detecting the connection of a main clutch and the neutrality of a transmission for judgment. CONSTITUTION:A control unit 61 has an integrating circuit 64 processing the signal of a height sensor 11, a height judging circuit 65 and a motor control circuit 66, and the first means consisting of the neutral switch 62 of a transmission and the clutch switch 63 of a main clutch and the second means consisting of a main stand switch 17 and a side stand switch 18 are used as the means to detect whether a vehicle is stopped or running. When the transmission is neutral and the main clutch is connected, a stop state judging circuit 69 judges that the vehicle is stopped, and the second means judges whether both stands are erected or not. A time constant adjusting circuit 68 is adjusted while the vehicle is stopped, the resistance value of the integrating circuit 64 is decreased to reduce the time constant, and the responsiveness is improved.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a vehicle height adjustment device for a motorcycle.

(Conventional technology) The responsiveness of the vehicle height adjustment device is increased when the vehicle is stopped when passengers are getting on and off or loading and unloading luggage, or when driving at low speeds on uneven roads, but it is unnecessary at high speeds when there are large disturbances and vibrations that are applied to the vehicle body. In order to avoid this adjustment, it has been known to adjust the time constant of an integrating circuit that processes a signal from a vehicle height sensor depending on the vehicle speed (Japanese Patent Laid-Open No. 60-209314).

(Problem to be Solved by the Invention) In the above-mentioned conventional technology, the vehicle height is adjusted according to the vehicle speed during the entire period of stopping and driving, so when driving in a city where there are many speed changes, the vehicle height adjustment device is not necessary. The adjustment motor operates frequently, consumes a large amount of power, and requires a vehicle speed sensor in addition to the vehicle height sensor. The present invention
The objective is to perform practically appropriate vehicle height adjustment without using a vehicle speed sensor.

(Means for Solving Three Problems) Means for solving the above problems in the present invention includes a vehicle height adjustment section that adjusts the height of the vehicle body, a vehicle height sensor that detects the distance between the wheels and the vehicle body, and the vehicle height sensor. A vehicle height adjustment device for a motorcycle having a time constant adjustment circuit that adjusts the time constant of an integral circuit that adjusts the vehicle height according to a signal of the vehicle, which detects a clutch signal that detects engagement of a main clutch and a neutral state of a transmission. The present invention is characterized by comprising a stop state determination circuit that determines based on a signal from a neutral switch, and a time constant adjustment circuit that adjusts the time constant of the integrating circuit based on the output of the stop state determination circuit. Two to four means are added as appropriate.

(Function) In the above means, when the main clutch is engaged and the transmission is in neutral, when the vehicle is stopped, the time constant is adjusted to a small value by the clutch switch and the neutral switch to increase responsiveness, and when the vehicle is started, the time constant is adjusted to a small value to increase responsiveness. Both switches are reversed, increasing the time constant and reducing responsiveness.

According to the means of claim 2, when the vehicle is stopped with the stand up, the control device becomes inactive to save power consumption, and according to the means of claim 3, when the vehicle is stopped without using the vehicle speed sensor, the vehicle is started. Immediately after, the responsiveness is high at low speed, and the responsiveness is lowered when the speed shifts to medium to high speed. According to claim (4), even if no sensor is provided on the main stand, full extension of the rear wheels is detected when the main stand is raised, and the control device is deactivated.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. 1st
2, 1 is a motorcycle in which the present invention is implemented, 2 is a main frame, 3 is a rear frame, 4 is a front fork that holds the front wheel 5, and 6 is a rear fork whose front end is attached to the main frame 2. It is pivotally mounted and holds the rear wheel 7 at the rear end.

A cushion 8 is provided between a support link 9 provided between the lower end of the main frame 2 and the swing arm 6 and a bracket provided on the main frame to support the weight and load of the vehicle.
0 is a vehicle height control section attached to the front of the vehicle body, which operates a vehicle height adjustment mechanism provided on the cushion 8 via a wire.

The first component is a vehicle height sensor attached to the rear frame 3, whose movable part is connected to the swing arm 6 by a link 12, and the output of the vehicle height sensor H is led to a control unit 14 via a relay 13. Also main stand 15
A main stand switch 17 and a side stand switch 18, which are opened and closed by each stand 15, 18, are provided on the frame portion facing the side stand 1B.

As shown in FIG. 3, the cushion 8 includes, in addition to a normal mechanism consisting of a hydraulic shock absorber 20 and a coil spring 21, a vehicle height adjustment section 22 that adjusts the position of one end of the coil spring 21.

The hydraulic shock absorber 2o is of a type in which a piston with a throttle slides inside a cylinder 23, and a connecting portion 24 on the piston side is connected to the support link 9, and a connecting portion 25 on the cylinder side is connected to the supporting link 9.
is connected to the vehicle body frame.

The vehicle height adjustment section 22 is composed of an outer cylinder 26 having a double structure with the cylinder 23, and a cylindrical piston 27 inserted between the two cylinders 23 and 26. A coil spring 2'' is interposed between the catch seats 28 of the outer cylinder 2B, and a hydraulic hose 29 is installed inside the outer cylinder 2B.
is connected, and the hydraulic pressure of the drive unit 1o is introduced.

Inside the cylinder 23, there is an air chamber 3 with a free piston 3o.
1 and an oil chamber 32, a piston 33 having a throttle passage is inserted into the oil chamber 32, and a passage 35 communicating with both sides of the piston 33 is provided in the piston rod 34.
A needle 37 for adjusting the opening degree of the nozzle 36 is inserted into the passage 35.

An adjusting cam 38 is used to move the needle 37 forward and backward.
is rotatably held by a support plate 39 fixed to the connecting portion 24, the cam 38 is biased by a return spring 40, and a wire 42 is connected to one end of the fan-shaped arm 41, the other end of which is connected to the steering wheel. Lever 43 attached to the handle (Figure 2)
is connected to.

Therefore, by rotating the lever 43, the cam 38
The damping force is adjusted by rotating the needle 37 to raise and lower the needle 37 and adjusting the opening of the orifice 36 to adjust the oil flow rate.

The vehicle height adjustment drive unit 10 for inserting or discharging oil into the outer cylinder 26 via a hydraulic hose in order to adjust the vehicle height is equipped with a hydraulic device 45 shown in FIG. The oil pipe 29 is connected. A piston 47 is inserted into the cylinder 46 to form an oil chamber 48, a threaded cylinder 49 is brought into contact with the lower surface of the piston 47, and a threaded rod 5D is screwed into the internal thread of the threaded cylinder 49. A groove 51 is cut in the outer surface of the threaded cylinder 49 in the longitudinal direction, and a stopper pin 51a is engaged with the groove 51.
6 has an upper limit switch 52 and a lower limit switch 53 attached to it, and the 18th limit shown in FIG.
The switch is activated when engaged with W52a or the lower limit groove 53a.

In FIG. 4(a), a case 54 is fixed to the lower end of the cylinder 46, and a gear 55 is supported by a shaft 56.
is connected to the screw rod 50 so as to rotate integrally therewith, and a worm 57 that meshes with a gear 55 is driven by a motor 58.

Therefore, when the motor 58 is established or reversed, the threaded rod 50
rotates to raise and lower the threaded cylinder 49, change the volume of the oil chamber 48, change the volume of the outer cylinder 26 of the vehicle height adjustment part 22, and change the protrusion amount of the ring piston 27, thereby connecting the connecting parts 24 and 25. Adjust the vehicle height by changing the interval.

The drive section 10 includes, for example, a control unit 6 shown in FIG.
1. The control unit 6I has a vehicle height sensor 11 and a main stand switch 17 as input signals.
, a signal from the neutral switch 62 indicating the neutral position of the transmission and a clutch switch 6 indicating the on state of the main clutch are provided in addition to the signal from the side stand switch 18.
3 signals are given.

The control unit 61 includes an integrating circuit 64 that processes a signal from the vehicle height sensor 11, a vehicle height determination circuit 65, and the adjustment motor 58.
These circuits are controlled so that the responsiveness is high when the vehicle is stopped, and the responsiveness is low when the vehicle is running. As means for detecting whether the vehicle is stopped or running, a first means using the neutral switch 42 of the transmission and a clutch switch 63 of the main clutch, and a second means using the main stand switch 17 and the side stand switch 18 are used. It will be done. The first means determines that the vehicle is stopped by the stop state determination circuit when the transmission is in neutral and the raw clutch is engaged, and the second means determines whether or not both stands are upright. Determine whether

A time constant adjusting circuit 68 for adjusting the time constant of the integrating circuit 64 is adjusted, and the resistance value of the integrating circuit is reduced to reduce the time constant and improve responsiveness.

The operation of the control unit 61 will be explained with reference to FIG. 6. When the main stand switch 17 and the side stand switch 18 are turned on, a control stop determination circuit 69 (to be described later) is activated, and control is started as shown in FIG.
Changes as shown in . During this time, the clutch switch 63 is turned off before starting as shown at 5, and after the transmission is switched from the neutral position to the gear position as shown at L2, the clutch switch 63 is turned back on and the vehicle starts moving. is turned off, the transmission is switched, and the vehicle speed is increased as shown by Ll. When the neutral switch 62 is on and the clutch switch 63 is also on, the stop state determination circuit 67 determines the stop state, and the time constant adjustment circuit 68 determines that the integration circuit 64 is in the stop state.
The time constant is reduced as shown by L4. In this state, the vehicle height is maintained at a predetermined level while quickly responding to vehicle height change factors such as boarding, loading of luggage, and uneven road surfaces.After starting, the time constant indicated by the L4 line is large. This slows down the response and prevents it from following disturbances or sudden vibrations. Therefore, the vehicle height after the vehicle starts is maintained substantially constant as shown by line L6, and unnecessary vehicle height adjustments are avoided.

Next, in the embodiments shown in FIGS. 7 and 8, compared to the previous embodiments, a delay circuit 71 for the signal from the clutch switch 63 is provided in the stop state determination circuit 47 of the control unit 70, and
The signal from the circuit 67 is transmitted to the control stop determination circuit 49 via another delay circuit 72, and the circuit 49 disables the motor control circuit. In this embodiment, since the on-signal of the clutch switch 63 is delayed, the timing of increase in the time constant is delayed. Therefore, when there are few disturbances or sudden signals when driving at low speed immediately after starting, a small time constant is used to increase responsiveness as desired. The vehicle maintains the vehicle height of 1. and also runs with a large time constant for a predetermined period of time after starting. After the time has elapsed, the delay circuit 72 activates the control stop circuit 69 to disable the motor control circuit 66.

As a result of the above, the vehicle height is adjusted to a positive value at low speeds with relatively few disturbances, the number of adjustments is reduced at high speeds with many disturbances, and the vehicle height adjustment is automatically discontinued after a certain period of time, so overall The number of adjustments can be reduced and the life of parts can be extended.

Next, in the embodiment shown in FIG. 9, the main stand switch 17 shown in FIG.
1 will act on your behalf.

When the main stand 15 is raised, the swing arm 6 is lowered and the vehicle height sensor 11 is fully extended, and when a signal of this state is input for a certain period of time, the main stand state determination circuit 76 raises the main stand 15. It is determined that the motor control circuit is inoperable, and acts on the control stop determination circuit 49 together with the signal from the side stand switch 18 to disable the motor control circuit.

(Effects of the Invention) As described above, the present invention utilizes the neutral switch and clutch switch of the transmission as sensors for determining whether the vehicle is stopped or running, so it has the advantage of not requiring a vehicle speed sensor. Since the time constant does not change even when the vehicle speed changes, the number of adjustments required is reduced and the durability of the parts is improved.

[Brief explanation of drawings]

Fig. 1 is a side view of a motorcycle embodying the present invention, Fig. 2 is a plan view, Fig. 3 is a longitudinal sectional view of the vehicle height adjustment device, and Fig. 4 (
(a) is a longitudinal cross-sectional view of the vehicle height adjustment drive unit, (b) is a cross-sectional view, (C) is an action explanatory diagram, and Fig. 5 is a configuration diagram of the control circuit.
FIG. 6 is an explanatory diagram of its operation, FIGS. 7 and 8 are other control circuit configuration diagrams and operation explanatory diagrams, and FIG. 9 is yet another control circuit configuration diagram. 8...Cushion (vehicle suspension system) 10...Vehicle height adjustment drive unit ■1...Vehicle height sensor 22...Vehicle height adjustment unit 62...Neutral switch 63...Clutch switch 64...・Integrator circuit 67... Stop state judgment circuit 68... Time constant adjustment circuit 69... Control stop judgment circuit Application for permission Honda Motor Co., Ltd. Kingai Kitamura 3 people Figure 3 Figure 6 Figure 4 Diagram (C)

Claims (1)

[Claims] 1. A vehicle height adjustment section that adjusts the height of the vehicle body, a vehicle height sensor that detects the distance between the wheels and the vehicle body, and an integral circuit that adjusts the vehicle height based on the signal from the vehicle height sensor. A vehicle height adjustment device for a motorcycle that has a time constant adjustment circuit that adjusts a constant; and a time constant adjustment circuit that adjusts the time constant of the integration circuit based on the output of the stop state determination circuit. 2. The control is stopped by a control stop judgment circuit when the main stand or side stand is raised.
The vehicle height control device for a motorcycle according to claim 1. 3. The vehicle height adjustment device for a motorcycle according to claim 1 or 2, wherein the output of the stop state determination circuit is guided to the control stop determination circuit through a delay circuit to stop the control. 4. The vehicle height control device for a motorcycle according to claim 1, wherein the control is stopped by a control stop determination circuit when the maximum value of the vehicle height sensor indicating full extension of the rear wheel continues for a certain period of time.