JPH0723557Y2 - Vehicle speed control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a vehicle speed control device capable of controlling a vehicle speed without deteriorating a drive feeling.

[Problems to be Solved by Conventional Techniques and Inventions] As is well known, in recent years, vehicles whose maximum speed is regulated may be used for leisure purposes, and various speed control devices for these vehicles have been proposed. Has been done.

For example, in Japanese Utility Model Laid-Open No. 59-73544, an engine is provided with a governor device, and an actuator that is actuated according to a load is provided in the governor device, so that the engine speed at which a certain load is applied to the engine is reached. A technique is disclosed that can be configured to reduce

However, according to this prior art, when the engine is loaded with a certain amount or more, the engine speed is reduced regardless of the vehicle speed. Therefore, as shown in FIG. Although there is a margin in the output of the vehicle, there is a risk that the rotation speed will be reduced and it will be difficult to start, and it will be difficult to suppress the increase in speed when running on level ground where the load does not increase so much. , The speed of the vehicle cannot be regulated accurately.

Further, in Japanese Utility Model Laid-Open No. 59-21060, a technology is provided in which a governor device is provided with a flip-flop circuit and the control lever opening of the governor device is corrected according to the combination state of transmission gears provided in the vehicle. Is disclosed.

However, this prior art cannot be used when the vehicle is not provided with a transmission, and the use range must be limited.

To deal with these problems, for example, the actual Kaisho 60-152056
Japanese Patent Laid-Open Publication No. 2003-242242 discloses that a communication pipe having a valve body is provided between an intake pipe and an exhaust pipe of an engine, and when the vehicle speed exceeds a certain level, the valve body is opened to perform exhaust gas recirculation to reduce the engine output. However, according to this prior art, a large amount of exhaust gas recirculation is performed at the time of sudden acceleration when the engine speed rapidly rises, which leads to misfire and drive of the vehicle. There is a problem that the feeling is deteriorated.

[Object of the Invention] The present invention has been made in view of the above-described circumstances, and it is possible to effectively use the output of the engine regardless of the presence or absence of a transmission, and the drive feeling is not deteriorated. An object of the present invention is to provide a vehicle speed control device capable of accurately controlling the vehicle speed.

[Means for Solving the Problems] In a vehicle speed control device according to the present invention, a control lever that controls a throttle valve opening in conjunction with a governor device connected to an output shaft via a governor cable is provided at one end of the throttle shaft. The throttle lever, which is fixed to the throttle shaft, is swingably arranged on one end side of the throttle shaft on the same axis as the accelerator, and the control lever and the throttle lever are connected via an elastic body. It is characterized by being set up.

[Operation] With this configuration, when the throttle lever disposed on the axis of the throttle shaft is rotated by the operation of the accelerator, the control lever connected to this throttle lever via the elastic body is rotated. Then, the throttle valve is opened via the above-mentioned throttle shaft to which this control lever is fixed. Further, when the rotational speed of the output shaft increases and reaches the set vehicle speed, the governor device rotates the control lever via the governor cable against the urging force of the elastic body. Then, the throttle valve is rotated in the valve closing direction and stopped at a position where the rotational torque of the governor device is balanced.

[Embodiment of the Invention] Hereinafter, an embodiment of a vehicle speed control device according to the present invention will be described with reference to the drawings.

1 to 6 relate to an embodiment of the present invention. FIG. 1 is an exploded perspective view of a main portion of a vehicle speed control device, FIG. 2 is a side view of the speed control device, and FIG. 3 is a governor chamber. 4 is a sectional view of the vehicle, FIG. 4 is a view taken along the line IV-IV of FIG. 3, and FIG.
FIG. 6 is a characteristic diagram showing the engine output on the vertical axis and the engine speed on the horizontal axis.

In these drawings, reference numeral 1 is an engine, and an intake pipe 1a of the engine 1 is provided with a carburetor 3 which is interlocked with an accelerator pedal 2 which is an example of an accelerator.
On the other hand, a transmission is provided adjacent to the engine 1, and an input shaft 4a of the transmission 4 and the engine 1 are provided.
The crankshaft 1b is connected to the crankshaft 1b via the clutch 1c.

Further, an output shaft 4b is arranged in parallel with the input shaft 4a in the transmission 4, and the output shaft 4b and the input shaft 4a are continuously connected via a plurality of transmission gears 4c. It is possible to change the combination of the transmission gears 4c with the shift lever 6 provided in the seat. The output shaft 4b is connected to the axles 5b and 5c of the vehicle via the output gear 5a and the like.

On the other hand, one side of the transmission 4 is provided with a governor chamber 7 covered with a cover 7a, and one end of the output shaft 4b is inserted into the governor chamber 7 and is inserted into the governor chamber 7. The governor sleeve 8 is slidably mounted on the portion. A flyweight 8a for urging the governor sleeve 8 is rotatably provided on the output shaft 4b via a flange 8b. For example, the wheels 5b, 5c are rotated at a speed corresponding to 40 km / h. When it reaches, the flyweight 8a is expanded with the rotation of the output shaft 4b, the governor sleeve 8 is pressed by the flyweight 8a, and is slid with respect to the output shaft 4b.

Further, the governor shaft 9 is rotatably inserted through a boss 7b projecting inside the cover 7a, and one end of the governor shaft 9 is brought into contact with the governor sleeve 8 by a swing member 9a. Is fixed, and when the governor sleeve 8 is slid, the swing member 9a is urged by the governor sleeve 8 to cause the governor shaft 9 to move.
Is designed to be rotated.

The other end of the governor shaft 9 extends to the outside of the governor chamber 7, and one end of a governor lever 11 is fixed to this portion. Further, one end of a governor cable 12 is fixed to the other end of the governor lever 11.

A governor spring 11a, one end of which is locked to the transmission 4, is locked to the central portion of the governor lever 11, and the governor sleeve 8, the flyweight 8a, the governor shaft 9, the swinging member 9a, the governor lever 11, Also, the governor device is constituted by the governor spring 11a.

The governor cable 12 extends in the direction of the vaporizer 3. A control lever 14 is fixed to one end of a throttle shaft 13 to which a throttle valve 13a of the carburetor 3 is fixed, and the governor cable 12 is engaged with the control lever 14 so that the governor lever
When the control lever 14 is rotated when 11 is rotated, the throttle valve 13a is rotated in the valve closing direction.

A throttle lever 16 is swingably arranged on the throttle shaft 13 on the same axis, and one end of an accelerator wire 17 connected to the accelerator pedal 2 is provided on one side of the throttle lever 16. When the accelerator pedal 2 is engaged, the throttle lever 16 is rotated in the direction opposite to the rotation direction of the control lever 14, that is, in the opening direction of the throttle valve 13a. ing.

Further, the throttle lever 16 and the control lever 14 are connected by a spring 18 as an elastic body, and when the accelerator pedal 2 is operated to rotate the throttle lever 16 with respect to the throttle shaft 13,
When the control lever 14 is rotated via the spring 18 and the throttle valve 13a is rotated in the valve opening direction, while the governor lever 11 is rotated, the control force is resisted against the biasing force of the spring 18. The lever 14 is rotated so that the throttle valve 13a is rotated in the valve closing direction regardless of the rotation angle of the throttle lever 16.

Further, one end of a return spring 19 is engaged with the other side of the throttle lever 16,
Is constantly urged by the urging force of the return spring 19 in a direction opposite to the direction of rotation by the accelerator wire 17.

That is, when the foot is released from the accelerator pedal 2, the throttle lever 16 is returned by the return spring 19, and at the same time, the control lever 14 is also engaged with the throttle lever 16 and the throttle valve 13a is operated in the closing direction.

Next, the operation of the embodiment having the above configuration will be described.

When the engine 1 is started and the throttle lever 16 is rotated with respect to the throttle shaft 13 via the accelerator wire 17 by depressing the accelerator pedal 2, this rotation is transmitted to the control lever 14 by the spring 18. The control lever 14 is rotated together with the throttle lever 16.

Since the control lever 14 is fixed to the throttle shaft 13, when the control lever 14 is rotated, the throttle shaft 13 is rotated and the throttle valve 13a is opened, so that the engine speed of the engine 1 is increased. Is gradually increased.

Next, when the accelerator pedal 2 is operated and the clutch 1c is engaged while the transmission gear 4c is engaged with the combination of the first gear by the shift lever 6, the rotation of the output shaft 4b by the engine 1 causes the output gear 5a to rotate. Through wheels 5
It is transmitted to b and 5c and the vehicle is started. In this state, since the transmission gear 4c is meshed with, for example, the first combination, the rotation of the output shaft 4b does not reach the predetermined rotation speed even if the rotation speed of the engine 1 is increased. Even if the engine 1 is overloaded, the transmission of the output of the engine 1 is not hindered, and the output of the engine 1 is
It is transmitted to 5b and 5c.

Eventually, the speed change gear 4c is sequentially switched to, for example, a second gear or a third gear, so that the vehicle speed is increased. In this case, as shown in FIG. 6, the rotation speed of the input shaft of the transmission 4 varies depending on the shift switching of the transmission gear 4c. Therefore, in the case where the governor device is operated at a predetermined vehicle speed as in the present invention, the output of the engine is reduced. Can be effectively brought out.

Due to the rotation of the output shaft 4b, the flange 8b is attached to the output shaft 4b.
The fly weight 8a provided via the
The flyweight 8a causes the governor sleeve 8 to slide.

Then, the rocker member 9a is rocked by the governor sleeve 8, whereby the governor shaft 9 is rotated, and a rotating torque is generated in the governor lever 11. This governor lever 11
Since the governor spring 11a is provided in the vehicle, when the vehicle reaches a predetermined vehicle speed, the output shaft 4b rises above a predetermined number of rotations, and the governor sleeve 8 begins to be pressed by the flyweight 8a, the rotational torque of the governor lever 11 increases. Then, the governor lever 11 rotates by overcoming the force of the governor spring 11a. The governor cable 12 fixed to the governor lever 11 causes the throttle valve 13a to rotate in the valve closing direction via the control lever 14.

Therefore, the amount of intake air supplied to the engine 1 is limited, the output of the engine 1 is reduced, the engine speed is reduced, and the speed of the vehicle is reduced. At this time, the throttle lever 16 that interlocks with the accelerator pedal 2 is loosely fitted to the throttle shaft 13, and the throttle lever 16 and the control lever are connected through the spring 18 so that the accelerator pedal is Even if 2 is stepped on, the above-mentioned throttle shaft 13 by the governor device
It does not affect the rotation of the throttle valve in the closing direction.

When the rotation speed of the engine 1 decreases, the vehicle speed decreases, and the rotation speed of the output shaft 4b decreases, the rotation torque of the governor lever 11 decreases. Therefore, the governor spring 11a returns the governor lever 11 and the governor cable 12 simultaneously. Will be returned. As a result, the turning force of the throttle shaft 13 in the throttle valve closing direction by the control lever 14 is released, and the throttle shaft 13 moves the spring 18 according to the amount of rotation of the throttle lever 16 corresponding to the depression amount of the accelerator pedal 2. The throttle valve 13a is rotated by the urging force and is actuated again in the valve opening direction. In this way, the operation is repeated so as to maintain a constant speed.

In this way, the throttle valve 13 is configured so that the biasing force of the spring 18 and the governor spring 11a and the output shaft 4b.
When the rotating torque of the governor lever 11 generated by the rotation of the motor is stopped at a balance, the drive feeling is not deteriorated and the speed is accurately limited to 40 km / hour, for example.

In this embodiment, the vehicle speed control device according to the present invention is
Although the example provided in the vehicle having the transmission 4 has been described, the speed control device of the present invention can be installed in a vehicle not provided with the transmission 4.

In addition, the vehicle speed control device of the present invention can be provided not only in a leisure vehicle, but also in an on-road vehicle, for example.

[Effects of the Invention] As described above, in the vehicle speed control device according to the present invention, the output of the engine can be effectively used regardless of the load state, and the drive feeling is not deteriorated. This has the effect that it is possible to accurately regulate the vehicle speed.

Moreover, since the control lever and the throttle lever are arranged on the same axis line at one end of the throttle shaft and are continuously connected through the elastic body, and the control lever is continuously connected to the governor device through the governor cable,
The mounting position of the governor device is not restricted by the position of the control lever, so that a relatively free layout is possible and the space can be effectively used.

[Brief description of drawings]

1 to 6 relate to an embodiment of the present invention. FIG. 1 is an exploded perspective view of a main portion of a vehicle speed control device, FIG. 2 is a side view of the speed control device, and FIG. 3 is a governor chamber. 4 is a sectional view of the vehicle, FIG. 4 is a view taken along the line IV-IV of FIG. 3, and FIG.
FIG. 6 is a characteristic diagram showing engine output on the vertical axis and engine speed on the horizontal axis, and FIG. 7 is a characteristic diagram of engine speed and engine output according to the prior art. 1 …… Engine 2 …… Accelerator pedal (accelerator) 4b …… Output shaft 12 …… Governor cable 13 …… Throttle shaft 13a …… Throttle valve 14 …… Control lever 16 …… Throttle lever 18 …… Spring (elastic body) )

Claims (1)

[Scope of utility model registration request] 1. A control lever for controlling a throttle valve opening in conjunction with a governor device connected to an output shaft via a governor cable is fixedly provided at one end of the throttle shaft, and the control lever is provided at one end of the throttle shaft. On the same axis,
A vehicle speed control device characterized in that a throttle lever interlocking with an accelerator is swingably arranged, and the control lever and the throttle lever are connected in series via an elastic body.