JP2528903Y2 - Automatic starter for vaporizer - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an automatic starter for a carburetor in which the opening of a choke valve and the opening of a first idle of a throttle valve at the start of an engine are automatically controlled in accordance with the ambient temperature of the engine. About.

[0002]

2. Description of the Related Art Conventionally, in the above carburetor, a thermowax is connected to a choke valve so that the choke valve is opened as the engine temperature rises, and the rotation of the choke valve is transmitted to a throttle valve by a cam. There is a configuration in which the first idle opening degree is controlled by using the control unit. (See JP-A-60-219441)

[0003]

[Problems to be Solved by the Invention] In the conventional carburetor, the choke valve and the throttle valve are controlled by a single thermo-wax, which is low cost and highly practical. Since only the wax is controlled, only the choke valve is controlled solely in accordance with the engine temperature, and the optimum air-fuel mixture is necessarily supplied in accordance with the start and warm-up operation state of the engine. However, as a result, there are drawbacks such as poor starting and a trouble in warm-up operation of the engine.

The present invention provides a carburetor that automatically and appropriately controls a choke valve and a throttle valve during startup and warm-up operation, thereby simplifying engine start-up and smoothing warm-up operation. The purpose is to:

[0005]

The carburetor according to the present invention is connected to a thermowax which expands and contracts in accordance with the temperature of the engine atmosphere. And a choke valve connected to the throttle control lever with a play of a fixed amount of rotation and energized in conjunction with a cell switch of the engine. And a solenoid that closes by the amount of the play.

[0006]

According to the above means, the throttle control lever is rotated by the thermowax in accordance with the engine ambient temperature, and the first idle opening of the throttle valve is adjusted. At the same time, the choke valve is rotated in conjunction with the throttle control lever, and the opening of the choke valve is adjusted. Then, when the cell switch is turned on to start the engine, the solenoid is energized, and the choke valve is closed by a certain degree of opening by the solenoid to supply a high concentration air-fuel mixture. When the cell switch is turned off after the start of the engine, the choke valve is opened again by the constant opening degree, slightly lowering the concentration of the air-fuel mixture and smoothly performing the warm-up operation. After that,
The thermo wax expands according to the ambient temperature of the engine,
The first idle opening is gradually lowered, and the choke valve is opened in conjunction with this.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 (A) is a side view showing one side of the vaporizer of the present invention, and FIG. 1 (B) is a side view showing the other side of the vaporizer of the present invention.

Reference numeral 1 denotes a vaporizer main body. The main body 1 is provided with an intake passage 2 therethrough. In the intake passage 2, a throttle valve 4 is disposed downstream of the venturi 3,
A choke valve 5 is arranged upstream of the venturi 3. A first throttle lever 7 is fixed to one outer end of the throttle shaft 6 of the throttle valve 4, and a spring 8 for urging the throttle valve 4 in a closing direction is disposed on the throttle lever 7. Further, an idle adjustment screw 9 which is in contact with the first throttle lever 7 and adjusts an idle opening is disposed on the carburetor body 1. A second throttle lever 10 is fixed to the other outer end of the throttle shaft 6, and a throttle control lever 11 for linking the second throttle lever 10 to the opening side of the throttle valve 4 is rotatably disposed. You. The throttle control lever 11 is connected to a thermo wax 12 which expands and contracts according to the engine atmosphere temperature, and rotates the throttle control lever 11 according to the engine atmosphere temperature.
The first idle opening of the throttle valve 4 is adjusted by interlocking the second throttle lever 10.

The thermo-wax 12 has a wax body 14 and a heater 15 pressed and arranged in a wax case 13, and a piston 16 that moves linearly in accordance with expansion and contraction of the wax body 14 is arranged in the wax body 14. A retainer 17 connected to the throttle control lever 11 is urged against the piston 16 by a spring 18 and pressed against the piston 16. The heater 15 is connected to a generator 19 of the engine, and is energized only during operation of the engine.

A first choke lever 22 is fixed to one outer end of a choke shaft 21 of the choke valve 5, and a spring 23 for urging the choke valve 5 in an opening direction is arranged on the choke lever 22. When the cell switch 25 of the engine is turned on, a solenoid 26 that is energized and rotates the choke valve 5 in the closing direction is connected by the rod 20. Also, at the other outer end of the choke shaft 21,
A second choke lever 27 is fixed, and a choke control lever 28 connected to the throttle control lever 11 by a connecting rod 31 is rotatably disposed. The choke control lever 28 is configured to rotate the second choke lever 27. Supporting pieces 29 and 30 for defining the amount of movement are provided. Therefore, since the choke valve 5 is urged in the opening direction, the second choke lever 27 abuts on the support piece 30 side of the choke control lever 28, and slightly opens the intake path 2. When the rotation of the throttle control lever 11 due to the expansion and contraction of the thermowax 12 is transmitted to the choke control lever 28 by the connecting rod 31, the second choke lever 27 is rotated and the opening of the choke valve 5 is adjusted. Reference numeral 34 denotes a battery provided in the engine.

Next, the operation of the above embodiment will be described. When the thermo-wax 12 expands and contracts according to the engine ambient temperature, the throttle control lever 11 is rotated to rotate the throttle valve 4.
Of the first idle is adjusted. Further, the choke control lever 28 is rotated in conjunction with the throttle control lever 11, and at the same time, the opening of the choke valve 5 is adjusted. When the cell switch 25 is turned on to start the engine, the solenoid 26 is energized, and the solenoid 2 is turned on.
6 causes the choke valve 5 to move to the second choke lever 27.
Is rotated and closed until it comes into contact with the support piece 29 of the choke control lever 28 to supply a high concentration air-fuel mixture. When the cell switch 25 is turned off after the engine is started, the choke valve 5
Is that the second choke lever 27 is the choke control lever 28
The intake path 2 is opened until it comes into contact with the support piece 30 to slightly lower the concentration of the air-fuel mixture. Thereafter, the thermo wax 12 expands in accordance with the ambient temperature of the engine, the first idle opening is gradually reduced, and the choke valve 5 is opened in conjunction with this.

FIG. 2 shows that the second choke lever 27 is provided with a stupid hole 32 and the connecting rod 31 is loosely fitted into this stuck hole 32 so that the solenoid 26 can close the choke valve 5 in the closing direction. An embodiment in which the rotation is allowed only by a fixed opening degree and an effect similar to that of the above embodiment can be obtained with a simple configuration will be described.

[0013]

As described above in detail, according to the present invention, a throttle control lever which is connected to a thermowax which expands and contracts in accordance with the engine ambient temperature and adjusts a first idle opening of a throttle valve, And a choke valve connected to the throttle control lever with a play of a fixed amount of rotation and energized in conjunction with a cell switch of the engine.When the energized, the choke valve is turned in the closing direction, and the choke valve is turned on. By providing a solenoid that closes by the play, the choke valve opening and the first idle opening of the throttle valve are controlled according to the engine ambient temperature, and only when the cell switch is turned on to start the engine, the choke valve is opened. Is closed by the specified opening to increase the mixture concentration. Control of the valve and the throttle valve is properly and automatically performed, starting can easily warm-up operation can be smoothly carried out with a good.

[Brief description of the drawings]

FIG. 1 (A) is a side view showing one side of the vaporizer of the present invention.

FIG. 1B is a side view showing the other side of the vaporizer of the present invention.

FIG. 2 is a side view showing another embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 carburetor body 2 intake path 4 throttle valve 5 choke valve 11 throttle control lever 12 thermo wax 26 solenoid 28 choke control lever

Claims (1)

(57) [Scope of request for utility model registration] A throttle control lever connected to a thermo wax that expands and contracts in accordance with an engine ambient temperature, and adjusts a first idle opening degree of a throttle valve; A choke valve connected to the throttle control lever, and a solenoid that is energized in conjunction with a cell switch of the engine and that rotates the choke valve in the closing direction when energized to close the choke valve by the play. Automatic starter for vaporizer.