JP2896723B2 - Automatic starter for vaporizer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carburetor for adjusting and controlling the amount and concentration of an air-fuel mixture supplied to an engine, and more particularly to a carburetor for automatically starting a properly enriched air-fuel mixture when the engine is started. The present invention relates to an automatic starter for a carburetor which can be supplied to an engine.

[0002]

2. Description of the Related Art A conventional starter for a carburetor is disclosed in the Shokai 6
There is 3-134152 publication. According to this, at the bottom of the starter plunger guide cylinder that slidably guides the starter plunger, a starter air-fuel mixture passage that opens below the fixed fuel level of the float chamber opens, and on the side wall of the starter plunger guide cylinder, A starter air passage leading to the atmosphere and a mixture passage leading to the engine-side intake passage from the throttle valve open,
The opening area of the starter mixture passage is controlled by a starter needle provided integrally with the starter plunger, and the opening area of the mixture passage and the starter air passage is controlled by the outer surface of the starter plunger. On the other hand, the opening and closing operation of the starter plunger with respect to each of the passages is as follows.
The heat-expandable material in the thermowax expands and contracts in response to a change in the temperature of the engine atmosphere including the heater. That is, when the engine ambient temperature is low, the operating rod is most retracted and the starter plunger is disposed at the upper position, and the starter air passage, the starter mixture passage, and the mixture passage are fully opened to form the mixture passage. The starting mixture is supplied to the engine, while the engine is started to start the warm-up operation, and the operating rods are protruded as the temperature rises, thereby gradually closing each of the passages with a starter plunger to start and mix. At the end of the warm-up operation of the engine, the operating rod is most protruded, and the passages are closed to automatically stop the supply of the starting air-fuel mixture.

[0003]

According to such a conventional automatic starter for a carburetor, the opening / closing operation of each passage of the starter plunger involves the expansion and contraction of a thermo-expandable material such as paraffin or olefin enclosed in thermowax. It is determined by one factor due to shrinkage and is controlled relatively straightforward, and it takes a lot of development time to select the thermal expansion and contraction material in order to meet the starting mixture required by the engine. Met. In addition, when the same automatic starter is applied to different engines, a lot of development time is required for a conformity test for the engines. In addition, the protrusion of the operating rod of the thermowax needs to be controlled to a constant protrusion under a constant temperature condition. According to this, it is necessary to prepare a constant temperature chamber in which the constant temperature condition is controlled and to maintain a constant. However, it is necessary to perform an adjusting operation or the like for adjusting the operating rod to the protrusion size, which is not preferable in terms of manufacturing.

In view of the above problems, the automatic starter for a carburetor according to the present invention is directed to automatically starting a mixture for start-up and a mixture for warm-up operation suitable for the ambient temperature of the engine from the carburetor toward the engine. The main purpose is to provide controlled supply.

[0005]

According to the automatic starter for a carburetor of the present invention, in order to achieve the above object, an intake passage penetrates the inside and the intake passage is opened and closed by a throttle valve operated by a driver. A controlled carburetor body, a float chamber body disposed opposite the carburetor body to form a float chamber with a constant fuel level stored therein together with the carburetor body, and directing fuel in the float chamber to an intake passage. And a first chamber and a second chamber are separated by a partition wall, and a first chamber and a second chamber are divided by a partition wall. The chamber communicates with the first chamber via a communication passage, a valve seat is opened at an end of the communication passage on the second chamber side, and a first fluid inflow passage through which the first fluid flows into the second chamber is opened. A second fluid inflow passage into which the second fluid flows into the first chamber; A valve body having an opening to the outlet, a movable core disposed opposite to a fixed iron core having a solenoid wound therearound and disposed facing a valve seat in the second chamber, and an end of the movable iron core integrally formed. An electromagnetic control valve comprising a valve portion formed and configured to control opening and closing of a valve seat, a movable core spring for elastically pressing and biasing the movable core valve portion toward the valve seat, and an engine for detecting a temperature state of the engine The control circuit receives the output of the temperature sensor and the output of the intake air temperature sensor that detects the temperature of the intake air that is taken in by the carburetor, and outputs a control signal to the electromagnetic control valve. The carburetor is opened and connected below a certain fuel level, the second fluid inflow passage is opened to the atmosphere, the mixed fluid outflow passage is opened to the engine-side intake passage from the throttle valve, and the engine atmosphere is connected to the mixed fluid outflow passage. Mixed fluid when the temperature is below a certain temperature It is obtained by placing a normally-closed thermal responsive valve for opening the Detchi.

[0006]

The state of the engine temperature and the intake air temperature are detected by the engine temperature sensor and the intake air temperature sensor and input to the control circuit.
The control circuit determines an optimal valve opening time according to the engine atmosphere temperature state, and the signal is output from the control circuit to the electromagnetic control valve. On the other hand, the thermoresponsive valve keeps the mixed fluid outflow passage open below a certain temperature. When the valve opening signal determined by the control circuit is applied to the solenoid of the electromagnetic control valve in a state where the ambient temperature of the engine including the engine is low, the valve portion of the movable iron core opens the valve seat and flows into the first fluid inflow passage. Fuel is supplied to the air flowing through the first chamber via the valve seat. First
In the room, the air and fuel are mixed to form an air-fuel mixture, and the air-fuel mixture is sucked into the engine-side intake path from the throttle valve via the thermoresponsive valve and the mixed fluid outflow path, thereby starting and warming up the engine. Driving is performed automatically.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of an automatic starter for a vaporizer according to the present invention. FIG. 1 is an overall configuration diagram as a first embodiment including a cross-sectional view showing an entire automatic vaporizer starter. C is a vaporizer, V is an electromagnetic control valve, and U is a control circuit.

[0008] The vaporizer C comprises the following. Reference numeral 1 denotes a carburetor body in which an intake passage 2 passes through in a horizontal direction. A throttle valve shaft 3 is rotatably supported in the intake passage 2 across the intake passage 2. A throttle valve 4 that opens and closes is attached, and a throttle valve lever 5 that is rotationally operated by a driver via an accelerator wire W is fixedly disposed at an end of a throttle valve shaft 3 that protrudes from the carburetor body 1. You. In addition, 6
The throttle valve return spring has one end locked to the carburetor body 1 and the other end locked to the throttle valve lever 5 to apply a rotational force in the closing direction to the throttle valve 4 (clockwise in FIG. 1). It is. G is a stop screw screwed to the carburetor main body 1 and is disposed in contact with the throttle valve lever 5 to adjust and hold the opening of the throttle valve 4 at an idling opening suitable for idling operation. . In a state where the driver does not operate the accelerator wire W at all (idling operation corresponds to this), the throttle valve lever 5 comes into contact with the stop screw G, and the throttle valve 4 operates by the spring force of the throttle valve return spring 6. At the idling opening.

A float chamber main body 7 is arranged to face the lower concave portion of the vaporizer main body 1, and a float chamber 8 is formed by the vaporizer main body 1 and the float chamber main body 7. A constant fuel liquid level is always formed by a valve seat and a float valve (not shown). A main nozzle serving as a fuel system F for supplying the fuel in the float chamber 8 to the intake passage 2 is opened in a venturi portion 10 in the middle of the intake passage 2. A low-speed injection hole serving as a fuel system F is opened in the passage 2A to supply the fuel in the float chamber 8 into the intake passage 2A.

Next, the electromagnetic control valve V will be described with reference to FIGS. FIG. 2 is a longitudinal sectional view of the electromagnetic control valve, and FIG.
3 is a cross-sectional view of a main part taken along line AA of FIG. In the description, the terms upper, lower, left, and right refer to the figures, and are not limited thereto.

Reference numeral 20 denotes a valve body having the following structure. A bottomed first chamber 22 is formed below the upper end 21 of the valve body 20, and a bottomed second chamber 24 is formed above the lower end 23, and the bottom of the first chamber 22 and the second chamber 24 are formed. 2
It is separated from the bottom of the chamber 24 by a partition wall 25. First
A second fluid inflow passage 26 into which the second fluid flows is opened on the left side of the chamber 22, and a mixed fluid outflow passage 27 is opened on the right side of the first chamber 22. A first fluid inflow passage 28 into which the first fluid flows is opened on the left side of the second chamber 24, and a communication passage 29 communicating the first chamber 22 and the second chamber 24 is formed in the partition wall 25. Is established. A cylindrical valve seat 30 is disposed at an open end of the communication passage 29 toward the second chamber 24. Thus, the second room 2
4 is connected to the first chamber 22 via the valve seat 30 and the communication passage 29.

S is an electromagnetic device having the following structure. Reference numeral 31 denotes a housing made of a bottomed cylindrical magnetic material having an open top, and a plate-shaped magnetic disk 3 made of a magnetic material is provided on a locking step 31A near an upper opening of the housing 31.
2 are arranged. A coil bobbin 34 around which a solenoid 33 is wound is disposed between the magnetic disk 32 and the bottom of the housing 31, and a fixed core 35 is disposed below the coil bobbin 34. A movable iron core 37 having a valve portion 36 is disposed at the upper end of the lever. Reference numeral 38 denotes a movable iron core spring contracted between the fixed iron core 35 and the movable iron core 37. The movable iron spring 38 separates the movable iron core 37 from the fixed iron core 35 and presses the valve portion 36 against the valve seat 30.

The magnetic pole disk 32 of the electromagnetic device S as described above is disposed on the lower end 23 of the valve body 20, and the upper open end of the housing 31 is swaged toward the valve body 20. According to this, the movable core 37 of the electromagnetic device S is housed in the second chamber 24, and the valve portion 36 provided at the upper end of the movable core 37 is
0. At this time, the movable iron core 37 is pressed upward by the elastic force of the movable iron core spring 38, so that the valve portion 36 comes into contact with the valve seat 30.

Reference numeral 39 denotes a pressing rod which reaches the vicinity of the valve seat 30 through the first chamber 22 and the communication passage 29 and is allowed to move in the vertical direction. The lower end of the pressing rod 39 faces the valve portion 36, The upper end of the pressing rod 39 is located on the upper end 21 of the valve body 20 and hermetically closes the upper opening of the first chamber 22 and is made of a diaphragm made of a rubber material or a curved thin metal material that allows vertical movement. Partition body 40 such as a spring disk
Oppose. The pressing rod 39 is elastically urged upward by the pressing rod spring 41. When no external force is applied to the pressing rod 39, the upper end of the pressing rod 39 presses the partition 40 and is locked. The lower end of the pressing rod 39 is
Are arranged facing each other without a gap.

Reference numeral 42 denotes a positioning member press-fitted into the outer periphery of the pressing rod 39. The positioning member 42 is provided between the sliding guide portion 42A, the outer peripheral portion of which is in sliding contact with the communicating passage 29, and the communicating passage 29. It has a plurality of communication grooves 42B in which long grooves are formed along the longitudinal axis line (the vertical direction in FIG. 2) and a flange diameter larger than the hole diameter of the communication passage 29 (in this example, four communication grooves 42B). When the pressing rod 39 moves downward, the locking flange 42C contacts the upper end 25A of the partition wall 25 to suppress the downward movement of the pressing rod 39 within a certain range. First flowing into the communication passage 29 through the valve seat 30
The fluid flows into the first chamber 22 through the communication groove 42B of the positioning member 42.

The control circuit U will be described. An engine temperature sensor 50 detects the temperature of an engine (not shown).
An intake air temperature sensor 51 is disposed near an engine such as a cylinder head, and detects an intake air temperature taken by the carburetor C. The intake air temperature sensor 51 is provided near the inlet of the intake passage 2 of the carburetor or in an air cleaner (not shown). Be placed. Then, when the output signals from the engine temperature sensor 50 and the intake temperature sensor 51 are input to the control circuit U, they first pass through the input circuit, the digital signals are directly converted, and the analog signals are converted into digital signals by an analog / digital converter. Is input to the microcomputer. The microcomputer performs arithmetic processing on the input signal, determines an optimal valve opening time according to the ambient temperature state of the engine including the engine, and outputs the result to the solenoid 37 of the electromagnetic control valve V through an output circuit.

The first fluid inflow passage 28 opens below the fixed fuel level in the float chamber 8 of the vaporizer C, the second fluid inflow passage 26 opens to the atmosphere, and the mixed fluid outflow passage 27 evaporates. The valve C is opened from the throttle valve 4 to the intake passage 2A on the engine side.
M is a heat-sensitive responsive valve arranged in the mixed fluid outflow passage 27, which keeps the mixed fluid outflow passage 27 open at a certain temperature or less and closes the mixed fluid outflow passage 27 at a certain temperature or more. For example, an electromagnetic valve that is opened and closed by a temperature sensor is used.

Next, the operation will be described. The starting of the engine when the ambient temperature of the engine is equal to or higher than a certain temperature will be described. In this state, power is not supplied from the control circuit U to the solenoid 37 of the electromagnetic control valve V by signals from the engine temperature sensor 50 and the intake temperature sensor 51.
According to this, the movable core 37 is a movable core spring 38.
, And the valve portion 36 closes and holds the valve seat 30. Thus, the second fluid inflow path 28
Fuel that has flowed into the chamber 24 does not flow into the first chamber 22 through the valve seat 30 and the communication passage 29. On the other hand, the thermoresponsive valve M senses a temperature equal to or higher than a certain temperature and closes and holds the mixed fluid outflow passage 27. Therefore, when the engine is started, the mixture or air is not supplied to the carburetor through the mixed fluid outflow passage 27, and the engine is controlled by the throttle valve 4 of the carburetor C. An air-fuel mixture formed by air and fuel from a fuel system F that opens from the throttle valve 4 to the intake passage 2A on the engine side is supplied, and the engine is operated. Since the ambient temperature of the engine is in a high temperature state above a certain temperature, a rich mixture is not particularly required for starting. In order to increase the rotation of the engine from idling operation, the driver pulls the operation wire W to rotate the throttle valve lever 5 counterclockwise against the spring force of the throttle valve return spring 6 to rotate the throttle valve. 4 is opened to increase the amount of air flowing in the intake passage 2 and to suck out fuel corresponding to the increase in the amount of air from the fuel system F that opens to the venturi into the intake passage 2.
Thus, the rotation can be increased.

Next, the starting of the engine in a state where the ambient temperature of the engine is low will be described. In this state, a drive pulse for the energization time T1 is applied from the control circuit U to the solenoid 37 of the electromagnetic control valve V by signals from the engine temperature sensor 50 and the intake temperature sensor 51. According to this, the movable iron core 37 is attracted to the fixed iron core 35 against the spring force of the movable iron core spring 38, and the valve portion 26 is moved to the valve seat 30.
And the fuel flowing into the second chamber 24 is
The air is sucked into the first chamber 22 through the communication passage 29 and the communication groove 42 </ b> B of the positioning member 42, and the second air is sucked into the first chamber 22.
The air is mixed with the air flowing into the first chamber 22 through the fluid inflow passage 26 to form an air-fuel mixture suitable for low-temperature starting.
The thermal response valve G detects the low temperature state of the engine ambient temperature and opens the mixed fluid outflow passage 27. Thus, the mixture is sucked from the throttle valve 4 into the intake passage 2A on the engine side through the mixed fluid outflow passage 27, so that the engine can be started at a low temperature.

When the engine enters the warm-up operation state after the start, the engine temperature is particularly increased in proportion to the warm-up operation time.
The drive pulse of the energization time T2 output from the control circuit U to the solenoid 37 to which the signal of the temperature rise is input to the solenoid 37 is shorter than the energization time T1 at the time of the low temperature start, and according to this, the valve seat is The valve opening time of the valve 30 is shortened, and the amount of fuel sucked into the first chamber 22 via the valve seat 30 and the communication passage 29 also decreases. Thus, the concentration of the air-fuel mixture formed in the first chamber 22 can be automatically reduced, whereby the warm-up operation of the engine is performed automatically and satisfactorily.

When the temperature of the engine reaches a predetermined temperature or higher after the engine has completed the warm-up operation, the control circuit U cuts off the power supply to the solenoid 37 by signals from the engine temperature sensor 50 and the intake air temperature sensor 51. The movable iron core 37 is again urged upward by the movable iron core spring 38 so that the valve portion 36 closes the valve seat 30, while the thermosensitive valve G also closes the mixed fluid outflow passage 27. Thus, no air-fuel mixture or air is supplied to the carburetor C via the electromagnetic control valve V. The engine is operated by a mixture formed by air supplied through the throttle valve 4 and fuel supplied from the fuel system F.

As described above, the engine temperature gradually rises with the lapse of time from the low temperature start to the completion of the warm-up operation, and this temperature change is sensed by the engine temperature sensor 50, whereby the control circuit U From solenoid 3 of electromagnetic control valve V
7 can be supplied with an energizing time corresponding to the temperature condition, and the heat-responsive valve M closes the mixed fluid outflow passage 27 when the warm-up operation is completed, so that a rich air-fuel mixture can be supplied to the engine at a low temperature start. In addition, the concentration of the air-fuel mixture can be gradually reduced with the progress of the warm-up operation, and the low-temperature start and the warm-up operation after the start can be automatically and reliably performed.

Although the above description particularly focuses on the change in the engine temperature, the same control of the mixture concentration can be performed also on the change in the intake air temperature.

Further, according to the present invention, when the movable iron core 37 needs to be operated, when the lead wire or the like of the solenoid 37 is disconnected, or when the connection of the terminals is released, the pressing rod is pushed through the partition body 40. 39 is pressed downward against the spring force of the pressing rod spring 41 to move the movable iron core 3.
7 has become possible. That is, when the pressing rod 39 is pressed downward through the partitioning body 40, the pressing flange 39 is moved by the locking flange 42C of the positioning member 42 to the partition wall 25.
According to this, the lower end of the pressing rod 39 abuts on the valve portion 36 to move the movable iron core 37 including the valve portion 36 downward.
Is separated from the valve seat 30 to open the valve seat 30. Thus the second
The fuel in the chamber 24 can flow into the first chamber 22 through the valve seat 30, the communication passage 29, and the communication groove 42B of the positioning member 42, so that the air and the fuel are mixed in the first chamber 22. As a result, an air-fuel mixture is formed and supplied to the vaporizer C.

FIG. 4 shows another embodiment. FIG.
Only the differences will be described, and the same structures will be denoted by the same reference numerals and description thereof will be omitted. A plurality of vaporizers C are arranged. In this example, the first carburetor C1 and the second carburetor C
2 constitutes a dual vaporizer. First of the electromagnetic control valve V
The fluid inflow passage 28 is connected to the first vaporizer C1 by opening below the fixed fuel level of the float chamber 8 of the first carburetor C1. The distribution passages 80A and 80B branch off from the mixed fluid outflow passage 27 downstream of the heat-sensitive valve M, and one distribution passage 80A is connected to the engine-side intake passage 2A from the throttle valve 4 of the first carburetor C1. Distribution path 80B
Is communicated from the throttle valve 4 of the second carburetor C2 to the intake passage 2A on the engine side. And each distribution path 80A, 80B
The control jets 81A and 81B are arranged at the same time.

According to the above, the control of the air or the air-fuel mixture supplied from the electromagnetic control valve V and the heat-sensitive responsive valve M is the same as that of the first embodiment. Since the air-fuel mixture was supplied to the devices C1 and C2 via the distribution paths 80A and 80B, the structure was simplified, the manufacturing cost could be reduced, and the degree of freedom in mounting on the engine could be increased. This effect is further improved by increasing the number of vaporizers, such as triple and quadruple units. Also, each distribution path 80
According to the arrangement of the control jets 81A and 81B in the A and 80B, in the case where it is difficult to supply uniform air or air-fuel mixture due to a difference in the length of the distribution paths 80A and 80B or a difference in the opening position in the direction of gravity. Control jet 8
By properly selecting 1A and 81B, uniform supply to each vaporizer can be performed.

[0027]

According to the automatic starter for a carburetor according to the present invention, the following effects can be obtained. As the time elapses from the low temperature start to the completion of the warm-up operation, the temperature of the engine gradually rises, and this temperature change is sensed by the temperature sensor, whereby the control circuit sends the temperature condition to the solenoid of the electromagnetic control valve. A drive pulse with an energization time commensurate with the above can be applied, so that a rich air-fuel mixture can be supplied to the engine via a mixed-fluid outflow path at a low-temperature start, and the air-fuel mixture concentration gradually increases as the warm-up operation progresses. Further, when the warm-up operation was completed, the supply of air or air-fuel mixture to the carburetor from the mixed fluid outflow path could be stopped, so that the cold start and the warm-up operation after the start could be performed automatically and reliably. Things. In addition, since the starting air-fuel mixture is controlled by driving the electromagnetic control valve with a drive pulse output from the control circuit without using the thermowax, problems of development efficiency and versatility due to the thermowax can be eliminated, and the number of work steps can be reduced. Was achieved. One end of the electromagnetic control valve is located in the communication passage and is opposed to the valve portion, and the other end is resiliently urged to a compartment that is in the first chamber and hermetically covers the opening of the first chamber. In the state where it is necessary to operate the movable iron core according to the provision of the pressing rod to be brought into contact with the solenoid, and in a state where current cannot be supplied to the solenoid, the movable iron core is forcibly operated by operating the pressing rod to operate the valve unit. Can be separated from the valve seat and the valve seat can be opened, so that an emergency function can be possessed, and the reliability of the device can be further enhanced. According to the arrangement of a plurality of carburetors and the connection of the intake passage on the engine side from the throttle valve of each carburetor and the mixed fluid outflow passage on the downstream side of the thermoresponsive valve by a distribution passage, a single electromagnetic control valve Since the air-fuel mixture was supplied to a plurality of carburetors via the distribution path, the structure was simplified, the manufacturing cost could be reduced, and the degree of freedom of attachment to the engine could be increased. According to the arrangement of control jets in each distribution path, when the supply of uniform air or air-fuel mixture is difficult due to differences in the length of the distribution paths or differences in the opening position in the direction of gravity, the control jet is appropriately selected. By doing so, it is possible to perform a uniform supply to each vaporizer.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram as a first embodiment including a cross-sectional view showing the entire automatic starter of a vaporizer.

FIG. 2 is a longitudinal sectional view of an electromagnetic control valve used in FIG.

FIG. 3 is a cross-sectional view of a main part taken along line AA of FIG. 2;

FIG. 4 is an overall configuration diagram as a second embodiment including a cross-sectional view showing the entire automatic starting device for a vaporizer.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 carburetor body 2 intake path 2A intake path on engine side from throttle valve 4 throttle valve 7 floater chamber main body 8 floater chamber 20 valve body 22 first chamber 24 second chamber 26 second fluid inflow path 27 mixed fluid outflow path 28th 1 fluid inflow path 29 communication path 30 valve seat 35 fixed iron core 36 valve part 37 movable iron core 38 movable iron spring 50 engine temperature sensor 51 intake air temperature sensor C carburetor V electromagnetic control valve U control circuit 40 partition 39 pressing rod M heat sensitive Valve 80A, 80B Distribution path 81A, 81B Control jet G Stop screw

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F02M 1/04 F02M 1/08 F02M 13/02 F02M 19/00

Claims (4)

(57) [Claims] 1. A carburetor body 1 in which an intake passage 2 penetrates the inside and an intake passage 2 is controlled to be opened and closed by a throttle valve 4 operated by a driver. A floating body 8 for forming a floating chamber 8 in which a constant fuel level is stored together with the main body 1, and a fuel system F for supplying the fuel in the floating chamber 8 to the intake passage 2; During operation, the carburetor C in which the throttle valve 4 is kept at the idling opening by the stop screw G, the first chamber 22 and the second chamber 24 are divided by a partition wall 25, and the second chamber 24 and the first chamber are separated. 22 is communicated via a communication passage 29, a valve seat 30 is opened at an end of the communication passage 29 on the second chamber 24 side, and a first fluid inflow passage 28 into which the first fluid flows into the second chamber 24. And the second chamber in which the second fluid flows into the first chamber 22.
The valve body 20 having the fluid inflow passage 26 and the mixed fluid outflow passage 27 opened therein, and the valve body 20 is disposed so as to face the fixed iron core 35 around which the solenoid 37 is wound, and faces the valve seat 30 in the second chamber 24. A movable iron core 37 disposed, and a valve portion 36 formed integrally with an end of the movable iron core 37 to control opening and closing of the valve seat 30
An electromagnetic control valve V comprising a movable core spring 38 for elastically pressing and biasing the valve portion 36 of the movable core 37 toward a valve seat; and an engine temperature sensor 50 for detecting a temperature state of the engine.
And an output of an intake air temperature sensor 51 for detecting a temperature state of the intake air sucked by the carburetor C, and a control circuit U for outputting a control signal to the electromagnetic control valve V. The passage 28 is opened and connected below a constant fuel level of the carburetor C, the second fluid inflow passage 26 is opened to the atmosphere, and the mixed fluid outflow passage 27 is opened from the throttle valve 4 to the intake passage 2A on the engine side. An automatic starter for a carburetor in which a normally closed thermosensitive valve M for opening the mixed fluid outflow passage 27 when the engine atmosphere temperature is equal to or lower than a predetermined temperature is disposed in the mixed fluid outflow passage 27. 2. One end of the electromagnetic control valve has a communication passage 2
9 and disposed opposite to the valve portion 36, and the other end is resiliently biased and abuts against the partition body 40 whose other end is within the first chamber 22 and covers the opening of the first chamber 22 in an airtight manner. Push rod 39
The automatic starting device for a vaporizer according to claim 1, further comprising: 3. A plurality of carburetors are arranged, and an intake passage 2A on the engine side from the throttle valve 4 of each carburetor and a mixed fluid outflow passage on the downstream side of the thermosensitive valve M are disposed in distribution passages 80A and 80B. 2. The automatic starting device for a vaporizer according to claim 1, wherein the automatic starting device is connected to the carburetor. 4. The control jets 81A and 8 are provided in the distribution path.
The automatic starter for a carburetor according to claim 3, wherein 1B is disposed.