JP3311513B2 - Vehicle speed limiter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for limiting the speed of a vehicle such as a cart for beginners.

[0002]

2. Description of the Related Art Conventionally, in order to limit the maximum speed of a vehicle,
For example, there are known a method of limiting the speed by controlling an ignition system such as a misfire, a thinning out of an ignition, a retarded ignition at a set vehicle speed or a set number of revolutions, and a method of restricting the speed by regulating a throttle opening. Japanese Unexamined Patent Application Publication No. 62-55467 discloses the former technology, and Japanese Unexamined Patent Application Publication No. Hei 3-202646 discloses the latter technology.

[0003]

However, the method of controlling the ignition system as in the former is mainly intended for speed regulation at a high vehicle speed (high output). A sharp drop in engine output occurs, which reduces drivability.

Further, the latter method of regulating the throttle opening is intended for speed regulation at a relatively low vehicle speed (low output). However, the feeling of acceleration at the time of starting is poor, and the gradient of a road surface or the like is poor. The setting limit value is likely to change depending on the setting.

[0005]

In order to solve the above problems, the present invention provides a throttle opening of an engine mounted on a vehicle.
Both speed regulation by restriction and speed regulation by ignition system control
In addition to suppressing individual operation by using
An interlocking regulation mechanism that always mechanically interlocks speed regulation
Equipped . Further, the present invention provides an
Throttle opening adjustment means and ignition system for adjusting opening
Close proximity to the ignition system control execution means for executing the control.
The throttle opening adjustment means and the ignition system control.
Between the means and the throttle opening adjustment means
Throttle opening limiter that regulates throttle opening by
Stage and the ignition system control
And ignition system control operating means for operating the control means.
An interlocking regulating member provided at the end is provided so as to be movable.
By moving the movement regulating member, the throttle opening regulation and point
It was configured to perform both fire system control at the same time.

[0006]

The throttle opening is regulated and, when a desired speed limit (or engine speed) is reached, the ignition system is controlled to regulate the speed. For example, in order to obtain a desired speed limit, only the throttle opening is regulated. This makes it possible to increase the throttle opening as compared with the case in which the throttle opening is performed. Therefore, a feeling of acceleration or the like can be satisfied, and the speed limit does not change due to the gradient of the road surface.

In the case where the speed is regulated only by controlling the ignition system, when the desired limit speed is reached in a state where the throttle opening is large, the engine output sharply drops, but the throttle opening is regulated. Even if the speed limit is reached in this state and the ignition system is controlled, the output does not drop sharply as described above. For this reason, drivability is improved without causing discomfort due to sudden deceleration. Furthermore, the interlocking regulation department
The throttle opening restriction means and the ignition system control actuation means
Can be linked with a single mechanical operation, ensuring vehicle speed
Regulations can be enforced.

[0008]

An embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a side perspective view of a cart equipped with the vehicle speed limiting device of the present invention, FIG. 2 is a plan view of the same, FIG. 3 is a view taken in the direction of arrow 3-3 in FIG. 5 is a partial enlarged view of a sheet stopper, FIG. 5 is a sectional view taken along line AA of FIG. 4, and FIGS. 6 and 7 are configuration diagrams of the present apparatus. The vehicle speed limiting device of the present invention is applied to a cart 1, and as shown in FIGS. 1 and 2, the cart 1 is provided with a front bumper 3, a rear bumper 4, and a side bumper 5 in four directions in front, rear, and side of a body frame 2. , 5, a seat 6 that can be adjusted to slide forward and backward at the rear of the body frame 2, and an engine 7 to the right of the seat 6. Reference numeral 7a is a starter motor attached to the engine 7.

That is, as shown in FIG. 3, the seat 6 is provided at its lower end with two pipe portions 6a parallel to the front-rear direction, and the pipe portions 6a slide on the two vehicle body frames 2 extending in the vehicle front-rear direction. 4 and a flange portion f is formed on one side of the pipe portion 6a as shown in FIG. 4 and FIG. 5 which is a cross-sectional view taken along line AA of FIG. The eccentric circular portion 28a of the stopper member 28 is rotatably supported by a shaft 29 inserted through the flange portion f.
When the handle portion 28b of the stopper member 28 is lifted, a gap is formed between the eccentric circular portion 28a and the frame 2, and the seat 6 slides without resistance, and the handle portion 28b
When b is lowered, the eccentric circular portion 28a comes into contact with the frame 2 to prevent the movement of the seat 6. Also, axis 2
9 by providing a return spring 28c
The eccentric circular portion 28a is always in contact with the frame 2,
When the seat 6 moves rearward, the handle portion 28b is rotated downward by friction between the eccentric circular portion 28a and the frame 2, so that an automatic locking effect can be obtained.

The driving force of the engine 7 is transmitted to the rear wheels 8 by the power transmission mechanism 9 shown in FIG. 1, and the steering of the steering handle 10 is performed by the tie rod 1 shown in FIG.
1, transmitted to the front wheel 13 via the knuckle arm 12. The throttle opening is located on the right front of the body frame 2.
An accelerator pedal 14 as adjusting means is provided, and two-foot brake pedals 15 are provided near the front center. A throttle cable 17 is provided between the accelerator pedal 14 and the engine 7, and the accelerator pedal 14
, The throttle valve 17 (FIG. 6) in the carburetor 18 is operated by the throttle cable 17.

FIG. 6 is a view showing an example of the configuration of the present apparatus, in which the accelerator pedal is viewed from the side, and FIG. 7 is a view in which the accelerator pedal is viewed from the back, in a state in which the vehicle speed is limited. The interlocking regulation mechanism 21 includes an interlocking regulation member 23 slidable along a fixed member 22 on the vehicle body side, and a limiter switch 2 as an ignition system control executing means connected to an ignition unit control circuit 25.
And a throttle opening restricting means for restricting the depression amount of the accelerator pedal 14 at one end of the interlocking restricting member 23.
With the pedal stopper portion 23a of the stage are provided, the point freely abut against the limiter switch 24 to the other end
A switch pressing portion 23b is provided as a fire system control operating means . In the figure, reference numeral 27 denotes a guide member for guiding the slide of the interlocking regulating member 23 .

Then, the interlocking regulating member 23 is slid to the left as shown in FIG.
a is located below the accelerator pedal 14, the vehicle speed limit is on, and the accelerator pedal 1 shown in FIG.
The tip of the stopper bolt 26 of the fourth bracket 14a abuts on the pedal stopper 23a to limit the amount of accelerator depression. That is, the opening of the throttle valve 19 is limited.

At this time, the switch pressing portion 23b is separated from the limiter switch 24. When the switch pressing portion 23b and the limiter switch 24 are separated from each other, the ignition unit control circuit 25 operates and the ignition control is performed. Is performed. Therefore, the interlocking regulation member 2 is changed to the configuration shown in FIG.
When 3 is set, the opening limit of the throttle valve 19 and the thinning control of the ignition are simultaneously performed. For example, if the opening of the throttle valve 19 is limited to 50%, and the ignition thinning rate is set to 25% at this time, it is possible to limit the vehicle speed favorably (improve drivability).

FIG. 8 is a view showing a state in which the vehicle speed is not limited. When the interlocking regulating member 23 is slid rightward and the pedal stopper 23a is separated from below the stopper bolt 26 of the accelerator pedal 14, the accelerator pedal 14 Can be depressed by a full stroke, and the switch pressing portion 2
3b depresses the limiter switch 24 to deactivate the ignition unit control circuit 25. That is, at this time, the thinning of the ignition is not performed at the set vehicle speed, and the normal limiter operation (ignition control for preventing the normal engine speed from over-rotating) is performed.

The operation of the above-described vehicle speed limiting device will be described. Now, for example, if it is desired to limit the speed to 24 km / H, and the engine output corresponding to the speed of 24 km / H is about 20%, and if the vehicle speed is regulated only by the throttle opening, a 20% throttle The acceleration is set to the accelerator depression amount (about 20%) at which the opening can be obtained. In this case, the acceleration at the time of starting is slow and slow, and the speed is slower than 24 km / H on a slight uphill.

In order to maintain the speed of 24 km / H only by controlling the ignition system, for example, if the throttle opening reaches 24 km / H during starting with a high output of about 70% or more, the speed suddenly increases to 2 km.
The engine output is reduced to about 0% (a sharp decrease of about 50%), which causes discomfort due to sudden deceleration and poor drivability.

Therefore, when both are used together as in the present invention,
The throttle opening can be made larger than the throttle opening corresponding to the desired speed limit (for example, about 50%),
The acceleration at the start can be sufficiently satisfied. In addition, the engine output is large, so it can maintain 24km / H even on a slight uphill.

In addition, even if the ignition system is controlled at the time when the speed limit is reached, the engine output does not suddenly decrease by about 50%, and good drivability can be maintained.

The sliding of the interlocking regulating member 23 may be mechanically operated by, for example, a link, a cable, or the like, or may be performed by other known means. The slide operation may be manually performed according to the above, and fixed by the fixing member 30 shown in FIGS. Further, it goes without saying that the control of the ignition system may be retarded ignition, misfire, or the like instead of thinning out the ignition as in the embodiment.

[0020]

As described above, the vehicle speed limiting device of the present invention uses ignition system control and regulation based on the throttle opening in combination, so that the drivability mainly when the vehicle speed is limited to a low vehicle speed (low output). It is possible to improve the prevention of discomfort due to sudden deceleration and the feeling of acceleration at the time of starting, and to stabilize the vehicle speed limit value. In addition, the ignition system control and throttle opening regulation should be linked by a single mechanical operation.
The vehicle speed can be reliably regulated.

[Brief description of the drawings]

FIG. 1 is a side perspective view of a cart equipped with a vehicle speed limiting device of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a view taken in the direction of arrow 3-3 in FIG. 2 (an enlarged view of a sheet).

FIG. 4 is a partially enlarged view of a sheet stopper.

FIG. 5 is a sectional view taken along line AA of FIG. 4;

FIG. 6 is a view showing an example of the configuration of the present device, in which an accelerator pedal is viewed from a side.

FIG. 7 is a view of the accelerator pedal viewed from the rear, showing a state in which vehicle speed is limited.

FIG. 8 is a view of the accelerator pedal as viewed from the rear, showing a state where vehicle speed limitation is not performed.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Cart, 14 ... Accelerator pedal, 17 ... Throttle cable, 21 ... Interlocking regulation mechanism, 23 ... Interlocking regulation member,
23a: pedal stopper portion, 23b: switch pressing portion,
24: limiter switch, 25: ignition unit control circuit.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification code FI F02P 9/00 304 F02P 9/00 304H (72) Inventor Hajime Tabata 1-4-1, Chuo, Wako-shi, Saitama (56) References JP-A-60-56134 (JP, A) JP-A-62-55467 (JP, A) JP-A-59-174346 (JP, U) JP-A-59-184336 (JP, U) ) Fully open sho 60-77748 (JP, U) Fully open sho 50-14926 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F02D 41/00-41/40 F02D 13 / 00-28/00 F02D 9/00-11/10 F02D 29/00-29/06 F02D 43/00-45/00 F02P 5/00-5/16

Claims (2)

(57) [Claims] 1. A device for limiting the speed of the vehicle, this device includes a speed control by the speed regulation and ignition system control by the throttle opening degree limit of the engine mounted on the vehicle
Together with each other to suppress individual operation.
A vehicle speed limiting device comprising an interlocking regulation mechanism for always mechanically interlocking these speed restrictions. 2. The interlocking restriction mechanism controls a throttle opening degree.
Throttle opening adjustment means and ignition system control for adjustment.
The ignition system control execution means for performing
These throttle opening adjustment means and ignition system control execution means
Between the throttle opening adjustment means
Throttle opening restriction means for restricting the throttle opening;
Perform ignition system control by separating from ignition system control execution means
And an ignition system control operating means for operating the means.
The interlocking regulation member provided for
Throttle opening regulation and ignition system control by moving members
And that both of them are performed at the same time.
The vehicle speed limiting device according to claim 1.