JPH0557344U - Vaporizer speed limiter - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a speed limiting device capable of suppressing a vehicle speed to a set value or less without changing the output characteristics of an engine and without lowering drivability. [Structure] A throttle lever 12 connected to an accelerator operator, a throttle arm 19 connected to a throttle valve 5 and synchronized with the throttle lever via a spring are provided, and the throttle arm 19 is opened at a predetermined opening or more.
Is provided with a throttle control lever 24 for controlling the throttle valve. This throttle control lever is connected to a servo motor 28 which is driven by inputting operation parameters such as engine speed or intake air amount. The servomotor control circuit 30 is provided with a detection means 32 for detecting a vehicle speed, and a speed limit is set in advance in the control circuit to control the fully open opening of the throttle valve so that the vehicle speed becomes equal to or lower than a set value.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a speed limiting device that limits a vehicle speed to a set value or less.

[0002]

[Prior Art]

 2. Description of the Related Art Conventionally, as a speed limiter for a vehicle, particularly a motorcycle, the output has been reduced by throttling the manifold to reduce the output or by throttling the fuel system. (See JP-A-55-12241)

[0003]

[Problems to be solved by the device]

 However, the above method causes a problem such as insufficient horsepower, resulting in a decrease in output as a whole, and deterioration in drivability. An object of the present invention is to provide a speed limiting device capable of suppressing the vehicle speed to a set value or less without changing the output characteristics of the engine and without lowering the drivability.

[0004]

[Technical means for solving problems]

 According to the present invention, a throttle lever connected to an accelerator operator and a throttle arm connected to a throttle valve and synchronized with the throttle lever via a spring are provided, and the throttle arm is engaged at a predetermined opening or more. A carburetor in which a throttle control lever for controlling the throttle valve is provided, and the throttle control lever is connected to a servomotor driven by inputting and operating parameters such as engine rotation speed or intake air amount This control circuit is provided with a detecting means for detecting the vehicle speed, and the control circuit is set with a speed limit in advance to control the fully open opening of the throttle valve so that the vehicle speed becomes equal to or less than a set value.

[0005]

According to the above means, the throttle arm operates in synchronization with the throttle lever when the throttle valve has a predetermined opening or less. Therefore, in this opening range, the accelerator operator and the throttle valve are synchronized. Further, when the throttle valve becomes a predetermined opening or more, the throttle arm engages with the throttle control lever, and the throttle valve is controlled according to the engine speed or the intake air amount. Then, the vehicle speed detected by the detecting means is sent to the control circuit of the servo motor, and when the vehicle speed reaches a specified value, the control circuit stops the throttle control lever to suppress the rise of the throttle valve and keep the vehicle speed below the set value. Be done. If the vehicle speed continues to increase, the control circuit lowers the throttle control lever so as to decrease the throttle valve opening.

[0006]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. 1 is a vaporizer. An intake passage 3 is provided through the main body 2, and a venturi portion 4 of the intake passage 3 is provided with a throttle valve 5 which can move forward and backward from above. A main nozzle 6 is opened in the bottom wall of the intake passage 3 below the throttle valve 5, and the lower end of the main nozzle 6 communicates with the lower surface of the fuel chamber 8 via a main jet 7. A jet needle 9 is suspended from the throttle valve 5, and the jet needle 9 is inserted into the main nozzle 6.

A throttle lever 12 is rotatably arranged in the upper chamber 11 of the throttle valve 5. A shaft 13 of the throttle lever 12 is fitted to a bearing 14 formed on one side wall of the upper chamber 11, and a wire drum 15 is attached to an outer end thereof. A return spring 16 for urging the throttle lever 12 in the closing direction of the throttle valve 5 is arranged between the wire drum 15 and the carburetor main body 2. The wire drum 15 is connected to the accelerator operator 17 by a cable wire 16, and the throttle lever 12 is rotated in accordance with the operation of the accelerator operator 17. A throttle arm 19 is rotatably fitted to the indoor side end of the shaft 13, one end of a rod 20 is pivotally attached to the tip end side of the throttle arm 19, and the other end of the rod 20 is connected to the throttle valve 5. It is pivotally attached. A spring 21 for urging the throttle arm 19 in the opening direction of the throttle valve 5 is arranged between the throttle lever 12 and the throttle arm 19, and the throttle arm 19 is normally synchronized with the throttle lever 12.

Further, a throttle control lever 24 that engages with the throttle arm 19 at a predetermined opening of the throttle valve 5 or more is rotatably disposed in the upper chamber 11. The throttle control lever 24 has its shaft 25 fitted to a bearing 26 formed on the side wall of the upper chamber. An outer end of the throttle control lever shaft 25 is connected to a servo motor 28, which is driven by an output signal of a control circuit 30 which inputs and calculates an operating parameter such as an engine speed or an intake air amount. Therefore, when the throttle valve 5 has a predetermined opening or more, the throttle arm 19 is operated against the spring 21 by the throttle control lever 24, and the throttle valve 5 is controlled to the optimum state according to the program of the control circuit 30.

The control circuit 30 is provided with a vehicle speed detecting means 32. Further, a speed limit is set in advance in the control circuit 30, and when the speed detected by the detecting means 32 reaches a set value, the control circuit 30 stops the raising of the throttle control lever 24 and restricts the opening degree of the throttle valve 5. The vehicle speed is maintained at the set value. Further, when the vehicle speed becomes higher than a set value on a downhill or the like, the control circuit 30 lowers the throttle control lever 24 and lowers the throttle valve 5 to the set value.

[0010]

[Effect of the device]

 As described above in detail, according to the present invention, the throttle lever connected to the accelerator operator, the throttle arm connected to the throttle valve and synchronized with the throttle lever via the spring are provided, and the throttle opening is equal to or larger than the predetermined opening. A throttle control lever that engages with the throttle arm and controls the throttle valve is provided, and this throttle control lever is connected to a servo motor driven by inputting and operating parameters such as engine speed or intake air amount. In this carburetor, the control circuit of the servo motor is equipped with a detection means for detecting the vehicle speed, the speed limit is set in advance in the control circuit, and the throttle valve is fully opened to keep the vehicle speed below the set value. Since the engine is controlled, the vehicle output can be maintained without changing the output characteristics of the engine and without reducing the drivability. It can be suppressed to below the set value. Further, the speed limit can be easily changed only by changing the set value of the control circuit, so that various specifications can be easily accommodated.

[Brief description of drawings]

FIG. 1 is a top view showing an embodiment of a vaporizer of the present invention.

FIG. 2 is a vertical sectional view of the vaporizer of the present invention.

FIG. 3 is a flowchart showing control contents in the embodiment of the present invention.

[Explanation of symbols]

 1 carburetor 3 intake passage 5 throttle valve 12 throttle lever 19 throttle arm 24 throttle control lever 28 servo motor 30 control circuit 32 speed detecting means

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location F02D 29/02 311 C 9248-3G

Claims (1)

[Scope of utility model registration request] 1. A throttle lever connected to an accelerator operator, a throttle arm connected to a throttle valve and synchronized with the throttle lever via a spring are provided, and the throttle arm engages with the throttle arm at a predetermined opening or more. A carburetor in which a throttle control lever for controlling the throttle valve is provided, and the throttle control lever is connected to a servo motor driven by inputting operation parameters such as engine rotation speed or intake air amount. The speed limit of the carburetor is characterized in that the circuit is provided with a detecting means for detecting the vehicle speed, the speed limit is set in advance in the control circuit, and the fully opened opening of the throttle valve is controlled so that the vehicle speed becomes equal to or less than the set value. apparatus.