JPH07238868A - Engine auto starter device - Google Patents

Abstract

(57) [Abstract] [Purpose] The auto starter device can be made compact and lightweight, the assembly is easy and the degree of freedom in design can be improved by eliminating the heat dissipation cover provided on the outside of the case body. To get A structure is characterized in that a gap 6 is formed between a case body 1 of an auto starter device and a holder 2 holding a thermo element S, and the gap is filled with a heat radiation preventing member in the form of air, liquid or solid. It is a thing. As the heat radiation preventing member, there are oil, urethane resin, styrofoam, rubber and the like having low thermal conductivity in addition to air. The second means is to keep the wiring 12 extending from the case body of the auto starter device for energizing the heating element 4 or the wiring retaining ring 11 fitted in the opening of the case body for supporting the wiring, the heat retaining means. Was set up.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of an auto starter device used for engines of motorcycles, scooters, automobiles, and the like, and more particularly, the auto starter device can be made simple and small and the thermoelement heat The present invention relates to an auto starter device for an engine, which is also excellent in keeping the expansion body warm.

[0002]

2. Description of the Related Art An engine in which gasoline is mainly used as fuel, and fuel and air are mixed at a predetermined mixing ratio by a carburetor attached to the engine and supplied into a cylinder, has a good startability on a cold morning. In order to do so, many are equipped with an auto starter device. When the engine temperature is low, this auto-starter device operates a valve to improve the ignitability of the mixture of fuel and air in the cylinder, and to operate the auxiliary fuel passages arranged in parallel in the mixture passage. This is for opening the fuel supply port and further supplying the fuel to the air-fuel mixture flowing through the air-fuel mixture passage to increase the fuel concentration. Then, when warm-up operation is performed and the engine temperature rises above a certain level, the valve is operated to close the fuel supply port, and the fuel concentration of the air-fuel mixture is automatically returned to normal.

As an auto starter device that performs such an operation, the applicant of the present invention has filed Japanese Patent Application No. 5-253360.
There is one proposed in the issue. In this auto starter device, the operation of the valve that opens and closes the fuel supply port is performed by a thermoelement that has a built-in thermal expansion body that expands and contracts due to changes in temperature. That is, the piston of the thermoelement is slid by expansion and contraction of the thermal expansion body, and the sliding of this piston operates the needle valve to open and close the fuel supply port. According to this auto starter device, when the engine is started, since the temperature near the thermal expansion body is low, the thermal expansion body is in a contracted state, and the piston is retracted to keep the needle valve away from the fuel supply port. The fuel supply port is open to the auxiliary fuel passage side. After the engine has warmed up to a certain degree, it is necessary to forcibly close the fuel supply port with a needle valve, but this auto starter device has a heating element on one end side of the thermo element and turns on the key switch. By doing so, the heating element is energized to generate heat, expand the thermal expansion body, and move the needle valve together with the piston. This allows
The fuel supply port is closed and fuel supply is stopped.

If the heat retention near the thermal expansion body of the auto starter device is poor, when the engine is stopped and restarted several minutes later, the thermal expansion body contracts in spite of the warming of the engine. However, there is a problem that the fuel supply port is opened and an excessive amount of fuel is supplied to the mixture passage, which rather deteriorates the startability. Therefore, in the conventional auto starter device, the outside of the case main body is covered with the heat radiation prevention cover. However, if the outside of the case body is covered with the heat radiation prevention cover, there is a problem that the auto starter device becomes large, the number of assembling steps increases, and the cost increases. Further, the conventional auto starter device has a problem that the total length of the auto starter device is inevitably long because the heating element is provided on the rear end surface of the thermoelement. Such an increase in the size of the auto starter device impairs the degree of freedom in designing, and there is a problem that the size of the accessory case is limited particularly in a small scooter having an accessory case under the seat.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and eliminates the heat radiation prevention cover provided on the outside of the case body, thereby making the auto starter device compact, lightweight and easy to assemble. An object of the present invention is to obtain an engine auto-starter device capable of improving the degree of freedom in design and improving the heat retention property in the vicinity of the thermal expansion body of the thermoelement to improve the startability at the time of restart. To do. Further, it is an object to obtain an auto starter device which can shorten the total length of the auto starter device and can be easily assembled by improving the structure of the heat generating means.

[0006]

A first means of the present application for solving the above-mentioned problems is to form a gap between a case body of an auto starter device and a holder for holding a thermoelement, and to form an air gap in this gap. It is characterized by being filled with a heat radiation prevention member in the form of liquid, liquid or solid. As the heat radiation preventing member, there are oil, urethane resin, styrofoam, rubber and the like having low thermal conductivity in addition to air. The second means is to provide heat retaining means on the wiring extending from the case body of the auto starter device for energizing the heating element or on the wiring holding ring fitted in the opening of the case body for supporting the wiring. It is characterized by that. As a specific heat-retaining means, an extension protruding along each of the wiring bundles is formed on the wiring retaining ring, the entire wiring bundle is covered with a protective tube, and the end of the protective tube on the connector side is welded to a bag. Formed into a shape. Each wiring was covered with a protruding portion along the wiring of the wiring retaining ring. The entire wire bundle projecting from the wire retaining ring was covered with a heat-shrinkable tube, and the heat-shrinkable tube was shrunk by heating.
A part or all of the exposed portion of the wiring was covered with a heat insulating cover from the outer wall edge of the main body surrounding the wiring retaining ring. The heat insulation cover was composed of a heat-shrinkable cover, and the heat-shrinkable tube was shrunk by heating. The third means relates to a heat generating means, and is composed of a hollow ring-shaped heat generating element fitted around the thermal expansion body on one side of the thermoelement and a pair of electrodes connected to the heat generating element. further,
The above-described first to third means may be combined to form an engine auto-starter device.

[0007]

According to the first means, a gap is provided between the case main body and the support member for the thermal expansion member, and this gap is filled with air or a heat radiation preventing material, so that the heat inside the case body does not enter the outside air. It can be prevented from being discharged, and the heat retaining property in the vicinity of the thermal expansion body of the thermoelement can be enhanced. Therefore, it is not necessary to provide a heat insulating cover outside the case body, and the structure of the auto starter device can be simplified and downsized. Also,
According to the second means, it is possible to reduce the amount of heat released to the outside air through the wiring extending from the outside of the case body to the outside or the wiring support ring fitted in the opening of the case body. It is possible to enhance the heat retaining property in the vicinity of the thermal expansion body of the thermoelement.

Further, according to the third means, the heating element is formed in a hollow ring shape so as to be fitted around the thermal expansion on one side of the thermoelement, and the heating element fitted on the one side of the thermoelement. Since the electrodes are connected to each other, the total length of the auto starter device can be shortened as compared with the case where the heat generating element is arranged between the thermo element case body. The first and third means can obtain the effect by themselves, but the combination of the first to third means can produce a higher effect by summing up the respective effects.

[0009]

Embodiments of the present invention will be described in detail with reference to the drawings. First, the above-mentioned first means will be described with reference to FIG. FIG. 1 is a partial cross-sectional side view for explaining the configuration of the auto starter device of the present invention. A screw portion 1c is formed in one opening 1a of the case body 1 of the L-shaped auto starter device, and the screw portion 1c is formed.
A cylindrical holder 2 is screwed onto the. A screw portion 2a that is screwed with the screw portion 1c of the case body 1 is formed on the outer periphery of the holder 2, and the outer diameter of the screw portion 2a is formed larger than the outer diameter of the body of the holder 2 excluding the screw portion 2a. There is. Therefore, when the holder 2 is screwed onto the case main body 1, a gap 6 is formed between the inner peripheral surface of the case main body 1 and the outer peripheral surface of the holder 2. The gap 6 blocks heat around the thermoelement S, which will be described later, from being directly transmitted from the holder 2 to the case body 1. The gap 6 is normally filled with air, but in addition to air, a solid heat insulating material such as urethane, styrofoam, or heat insulating rubber, or a liquid heat insulating material such as oil having low thermal conductivity may be filled. Good. By filling the gap 6 with such a heat insulating material, it is possible to effectively prevent the heat radiation from the case body 1.

A thermoelement S, which is an operating body for operating the needle valve, is provided in the holder 2. A part of the thermoelement S is formed as a holding portion 3 having an outer diameter slightly smaller than the inner diameter of the holder 2, and the holding portion 3 is inserted into the through hole of the holder 2 and fitted therein. On one side where the holding portion 3 of the thermoelement S is provided,
A thermal expansion body Sa having a property of expanding and contracting according to a change in external temperature is provided. Furthermore, on one side of the thermoelement S, a heating means E having a heating element 4 for expanding the thermal expansion body Sa is provided. The heat generating means E is connected to a key switch (not shown) such as a scooter via the wires 12 and 12. When the key is inserted into the key switch to turn it on (engine startable state), the heat generating element 4 is energized. It is designed to generate heat.

The piston 7b operated by the expansion and contraction of the thermal expansion body Sa is guided by a piston guide 7a extending on the other side of the holding portion 3 so as to be able to move back and forth. The tip of the piston 7b projects from the end of the piston guide 7a,
It is connected to a pressing body 7 which is slidably fitted in the through hole of the holder 2. Reference numeral 8 is a coil spring 8 as an elastic member that constantly urges the pressing body 7 toward the retracted direction side (the case body 1 side), and the urging force of the coil spring 8 causes one side of the thermoelement S to be a bottom portion of the case body 1. It is pressed against and fixed to a predetermined position of the case body 1.

According to the above-mentioned mode, when the heat generating means E is energized to generate heat, the thermal expansion body Sa expands and the piston 7b expands, and the pressing body 7 resists the biasing force of the coil spring 8 from the case body 1. Move it in the protruding direction. As a result, the needle valve (not shown) closes the fuel supply port to stop the fuel supply. On the contrary, when the heat generating means E is de-energized, the thermal expansion body Sa contracts and the piston 7b contracts as the ambient temperature of the thermoelement S decreases. As a result, the pressing body 7 is pushed back into the holder 2 by the urging force of the coil spring 8, and the needle valve opens the fuel supply port to enable fuel supply.

Next, the second means, that is, the heat retaining means for the wiring or the wiring retaining ring will be described with reference to FIGS. Heat generating means E provided on one side of the thermoelement S
Wirings 12, 1 whose one ends are connected to the electrodes 10a, 10b of
2 extends to the outside of the auto starter device from the other opening 1b of the case body 1. Reference numeral 11 is a rubber or resin wiring retaining ring that is fitted into the opening 1b and supports the wirings 12, 12. Further, reference numeral 13 is an insulating protective tube that protects the wirings 12 and 12 from being damaged while gathering the wirings 12 and 12 together outside the auto starter device. The other ends of the wirings 12 and 12 are connected to a connector C and can be freely attached to and detached from a connector on the key switch side (not shown).

When the heating element 4 generates heat, a part of the heat is transmitted to the outside air through the electrodes 10a and 10b and the wirings 12 and 12. In order to achieve the object of the present application, it is preferable to reduce the amount of heat radiated from the wirings 12, 12 to the outside air as much as possible. Although heat radiation from the surface of the wiring holding ring 11 can be prevented to some extent by forming the wiring holding ring 11 from rubber or resin having low heat conductivity, the wiring holding ring 11 is released to the outside air through the wirings 12 and 12. The amount of heat cannot be reduced. Therefore, it is desirable to provide some kind of heat retaining means not only for the wiring retaining ring 11 but also for the wirings 12, 12. 2 to 6 show an embodiment of heat retaining means for reducing the amount of heat released from the wirings 12, 12 and the wiring retaining ring 11 as much as possible. 2 to 6, the same parts and members as those in FIG. 1 are designated by the same reference numerals.

In the embodiment shown in FIG. 2, the wiring holding ring 11 'is provided.
A convex portion 11a ′ is provided on the outer surface of the protective tube 13 and the wirings 12 and 12 are supported through the convex portion 11a ′, and the protective tube 13 is wrapped around the wiring 12 and 12 and has one side fitted to the convex portion 11a ′. 'Is provided. Convex portion 11
The a'and the protective tube 13 'are joined by an adhesive or a heat welding method, and the other end is melted and closed in the vicinity of the connector C. The protective tube 13 'hides the wirings 12 and 12 to enhance the aesthetic appearance and prevents the wiring 1 from being twisted or broken.
The main purpose is to protect 2,12,
It is possible to reduce the heat radiation from the wirings 12 and 12 by using a material having a high heat retaining property such as urethane or by increasing the thickness thereof. Furthermore, protective tube 1
By filling the 3'with a heat insulating material having excellent flexibility such as cotton, styrofoam, or urethane, it becomes possible to more effectively suppress the heat radiation from the wirings 12, 12.

In the heat insulating means of the embodiment shown in FIG. 3, the convex portion 11a "of the wiring retaining ring 11" is extended along the wirings 12 and 12 to the vicinity of the protective tube 13. Also,
In the embodiment shown in FIG. 4, the individual wirings 12, 12 are covered with a heat-shrinkable heat radiation prevention cover 15, and a protective tube 13 ″ is provided on the outer side thereof.
The heat radiation prevention cover 15 for covering the connector may be extended to the connector C, but as shown in FIG.
A gap 13a "may be provided between the protective tube 13" and the protective tube 13 ".

Further, in the embodiment shown in FIG. 5, a bag-shaped protective tube 16 made of rubber, urethane, heat-shrinkable tube, etc., which covers the wires 12, 12 together from the outside of the wire holding ring 11 of the case body 1, is provided. It is provided. According to this embodiment, not only the heat radiation from the wirings 12 and 12,
There is a feature that heat radiation from the surface of the wiring retaining ring 11 can be reduced. Although a space 16a is formed between the protective tube 16 and the wirings 12, 12, the space 16a is filled with not only air but also styrene foam, urethane, rubber or the like having high heat retention. As a result, higher heat retention can be expected.

The embodiment shown in FIG. 6 is a combination of the embodiment shown in FIG. 5 and the embodiment shown in FIG.
2, 2 and 12 are covered with a heat-shrinkable heat radiation prevention cover 15, and a protective tube 16 made of a rubber tube, a heat-shrinkable tube or the like is further provided around the heat-shrinkable heat radiation prevention cover 15. Further, the covering material for collecting the wirings 12, 12 is also the same as the protective tube 13 ″ shown in FIG. 4. The heat retaining means in this embodiment is the heat retaining effect of the heat retaining means of FIG. 4 and the heat retaining means of FIG. It is possible to obtain the heat retaining effect combined with the heat retaining effect.In this way, by appropriately combining the heat retaining means shown in the embodiments of FIGS. Will be able to get.

Finally, the heating means, which is the third means, will be described with reference to FIGS. 7 and 8. 7 and 8 are views for explaining the structure of the heat generating means E, FIG. 7 is an exploded perspective view of the heat generating means E, and FIG. 8 is a main part showing a state in which the heat generating means E is attached to the rear end of the thermoelement S. It is an expanded sectional side view. As shown in FIG. 7, the heat generating means E in this embodiment.
Is a hollow ring-shaped heating element 4 that can be externally fitted to the rear end of the thermoelement S, a cylindrical storage holder 9 having a bottom for housing the heating element 4, and an inner wall surface of the storage holder 9. One electrode 10a that is in contact with the outer circumference of the heating element 4;
It is composed of the other electrode 10b arranged so as not to come into contact with the electrode 10a at the bottom of the storage holder 9.

As shown in FIG. 8, one side of the thermoelement S containing the thermal expansion body Sa is formed in a tapered shape whose outer diameter increases toward the other side, and the inner peripheral surface of the heating element 4 is A tapered surface that matches the taper is formed. Therefore, when the heating element 4 is externally fitted to the rear end of the thermo element S, the tapered surfaces are firmly coupled to each other at a certain position on one side of the thermo element S, so that the thermo element S
The mounting position of the heating element 4 with respect to is determined,
A reliable contact state with the thermoelement S is maintained. Electrodes 10a and 10b are connected to the heat generating element 4, and the electrodes 10a and 10b are connected to one ends of the wirings 12 and 12 for supplying power from the outside.

The heating element 4 fitted on one side of the thermoelement S is housed in a bottomed cylindrical housing holder 9 which is covered from one side of the thermoelement S. The storage holder 9 is made of plastic or non-conductive metal, and has a semi-arcuate electrode accommodating portion 9a that engages with the one semi-circular electrode 10a on its inner peripheral surface. The other disk-shaped electrode 10b is housed in the bottom portion 9b of the housing holder 9. Further, a stepped portion 9c is formed between the electrode housing portion 9a and the bottom portion 9b so that the electrodes 10a and 10b are not short-circuited, and the heating element 4 and the electrode wire 1 are formed on the stepped portion 9c.
0a and 0a are arranged. When the thermoelement S is attached to the case body 1, the thermoelement S
Is pressed against the bottom of the case body 1 by the urging force of the coil spring 8, so that one side of the thermoelement S and the other electrode 10b housed in the electrode housing 9b at the bottom of the housing holder 9 are in contact with each other. Thermo element S
Is usually made of a conductor such as aluminum or brass, so that the current from the electrode 10a can flow to the electrode 10b through one side of the heating element 4 and the thermoelement S. When the thermoelement S is a non-conductive body,
A conductor bypass may be provided separately from the electrode 10b to the heating element 4.

The form of the electrodes 10a, 10b is not limited to this as long as the heating means E can be energized, and the heating element 4 fitted on one side of the thermoelement S is used.
It is also possible to adopt a mode in which a pair of electrodes is directly connected to the outer peripheral surface of the. FIG. 9 shows another embodiment of the heat generating means in which a pair of electrodes are directly connected to the outer peripheral surface of the heat generating element.
It is the exploded perspective view. In the figure, reference numeral 4'is a heating element, reference numerals 10a 'and 10a' are electrodes, reference numeral 12 'is wiring connected to the electrodes 10a' and 10a ', and reference numeral 9'is electrodes 10a' and 10a 'and a heating element 4'. It is a bottomed cylindrical storage holder for storing.

The heating element 4'has an inner peripheral surface formed in a tapered shape similarly to the heating element 4 described in the above embodiment, and the electrode 1
0a 'and 10a' are the electrodes 10a described in the above embodiment.
Has a shape that is divided into two in the middle part.
When the heating means E'is assembled, the electrodes 10a ', 10a',
A gap is provided between the electrodes 10a 'and the electrodes 10a', 10
In order to prevent a'and the heat generating element 4'from rotating, the heat generating element 4'is formed with a projection 4a 'which engages with a cutout portion 9d' formed on the outer peripheral surface of the storage holder 9 '. There is. The electrode holding portions 9a ', 9a' of the holding holder 9'are formed on both sides of the inner wall surface of the holding holder 9 'sandwiching the notch 9d', and are housed in the electrode holding portions 9a ', 9a'. The electrodes 10a 'and 10a' can be brought into contact with the outer peripheral surface of the heating element 4 '.

When assembling the heating element 4 ', the storage holder 9', and the electrodes 10a ', 10a' shown in FIG. 9, the heating element 4'is fitted onto one side of the thermoelement S and the projection 4a is formed. The electrodes 10 are provided on both sides of the outer peripheral surface of the heating element 4'that sandwiches the '
a ', 10a' are arranged and the projection 4a 'is aligned with the notch 9d', and the heating element 4'and the electrodes 10a ',
10a 'is stored in the storage holder 9'. Then, the electrode 10 in which the wirings 12 'and 12' are connected from the notch 9d '
A part of a ', 10a' is extended. According to the heat generating means E ′ having such a configuration, the above-described embodiment (FIGS. 7 and 8) is used.
The thermoelement S like the heat generating means E in
There is no need to dispose the electrode 10b between the storage holder 9 and the storage holder 9, and there is a feature that it can be made more compact.

The operation of the auto-starter device of the present invention thus constructed will be described. As in the first embodiment shown in FIG. 1, the holder 2 holding the thermoelement S forms the case main body 1 with the gap 6 interposed therebetween. The holder 2 and the case body are simply inserted into the case body 1 by the guide 7a, the pressing body 7 and the holder 2 and the storage holder 9 containing the thermal expansion material 3, the heating element 4 and the like is arranged at a predetermined position. Since the air layer is formed between the thermoelement S and the heat expansion element 1, the heat retention in the vicinity of the thermal expansion body Sa of the thermoelement S is excellent.

FIG. 10 shows the effect of the present invention, in particular, the effect relating to heat retention in the case body, in comparison with the conventional auto starter device. In the table, the solid line shows the measurement result of the auto starter device of the present application, and the dotted line shows the measurement result of the conventional auto starter device. Further, the vertical axis of the table represents the temperature (° C.) near the thermal expansion body of the thermoelement, and the horizontal axis represents the elapsed time (minutes) after the energization state of the heating element was released.

Table 1 of FIG. 10 (a) shows the effect of the first means of the present application, that is, a gap is provided between the case body and the holder, and air is interposed in this gap. . As is apparent from the table, the temperature drop curve of the auto starter device of the present application has a small gradient, and the temperature difference in the case body increases after 10 minutes. Table 2 of FIG. 10 (b) shows the effect of the second means of the present application, that is, the wire or the wire retaining ring extending from the case body is provided with a heat insulating means. As in the case of the first means, the second means also has a small gradient of the temperature drop curve, and the temperature difference in the case body becomes large after 10 minutes. This means that the second means mainly reduces the amount of heat that is indirectly released to the outside through the wiring, but it is possible to obtain a considerable heat retaining effect only by this means. It represents. Therefore, the autostarter device in which the first means and the second means of the present application are combined is the sum of the heat retaining effects of the first means and the second means, so that a considerable heat retaining effect can be expected.

Further, since the heat generating means, which is the third means of the present invention, can be compactly integrated in the case body 1, the overall length of the auto starter device can be made small and compact. Further, since the heating element 4 portion is in close contact with the outer peripheral surface of the thermal expansion material 3, there is a feature that the heat transfer effect is excellent.

In the above embodiment, the heating element 4 is used.
Is a so-called general “thermistor” described in the specification of Japanese Patent Application No. 5-253360 by the applicant of the present application (for example, “Electronic Glossary” 199 published by Denpa Shimbun).
The same as that of the electrode 0a, but other materials, for example, a silicon rubber composition mixed with a predetermined amount of carbon fine particles or carbon powder,
Heat is generated by passing an electric current between the electrodes 10b, and when the temperature reaches a predetermined temperature, the electric resistance becomes large and the electrodes 10a and 10b are both heated.
It may be possible that the current does not flow in the meantime and the temperature of the heating element 4 can be maintained at a predetermined temperature. Regarding the structure of such a heating element composed of a silicone rubber composition and carbon fine particles or carbon fine particles, for example, JP-A-63-2
No. 07081 and Japanese Utility Model Laid-Open No. 62-161862. The heating element 4 made of a silicone rubber composition is relatively easy to manufacture, inexpensive and lightweight,
The feature is that you can select any shape.

Although the preferred embodiment of the present invention has been described, the auto starter device obtained by combining the first to third means shown in the above embodiment is the first to third embodiments.
It is possible to obtain the total effect of the effects of
Extremely useful.

[0031]

The auto starter device of the present invention does not require a covering cover for covering the entire case body, so that the number of parts can be extremely reduced. Moreover,
Since it is possible to prevent heat radiation from the wiring retaining ring that holds the wiring bundle in the opening of the case body, it has excellent heat retention,
When the engine is stopped and restarted a few minutes later, the problem that excessive fuel is supplied and the startability is deteriorated can be eliminated. Furthermore, since the heating element is formed into an annular shape and the electrode can be inserted into the inside of the holding member, and can be securely housed in the holding member, it can be formed compactly, easy to assemble, and the total length of the auto starter device can be shortened. The entire auto starter device can be downsized.

[Brief description of drawings]

FIG. 1 is a partial sectional side view of an auto starter device of the present invention.

FIG. 2 is a partial cross-sectional side view of an embodiment of the heat retaining means of the present invention.

FIG. 3 is a partial cross-sectional side view of another embodiment of the heat retaining means of the present invention.

FIG. 4 is a partial cross-sectional side view of another embodiment of the heat retaining means of the present invention.

FIG. 5 is a partial cross-sectional side view of another embodiment of the heat retaining means of the present invention.

FIG. 6 is a partial cross-sectional side view of another embodiment of the heat retaining means of the present invention.

FIG. 7 is an exploded perspective view showing the configuration of an embodiment of the heat generating means of the present invention.

8 is an enlarged cross-sectional side view of a main part showing a state in which the heating element portion of FIG. 7 is externally fitted to one side of the thermoelement.

FIG. 9 relates to another embodiment of the heat generating means of the present invention,
It is an exploded perspective view showing the composition.

FIG. 10 is a diagram showing the effect of the auto starter device of the present application, (a) is a graph showing the effect when a gap is provided between the case body and the holder, and (b) is a wiring extending from the case body. Alternatively, it is a graph showing the effect in the case where a heat retaining means is applied to the wiring retaining ring.

[Explanation of symbols]

 S Thermo-element Sa Thermal expansion body E, E'Heating means 1 Case body 2 Holder 3 Holding part 4 Heating element 6 Gap 7 Pressing body 7a Piston guide 7b Piston 9 Storage holding body 9a, 9b Electrode storage part 9c Stepped part 9d Notch Parts 10a, 10b Electrodes 11 Wiring retaining ring 12 Wiring 13 Protective tube

Claims (10)

[Claims] 1. A thermostat in which a thermal expansion body (Sa) that expands and contracts due to an external temperature change is built in one side, and a piston (7b) provided on the other side is moved forward and backward by the expansion and contraction of this thermal expansion body. An element (S) and a heat generating means (E) provided on the one side of the thermoelement for forcibly moving the piston, and the heat generating means is energized when the engine is started. In the auto starter device for closing the fuel supply port of the auxiliary fuel passage arranged in parallel in the mixture passage for supplying the mixture to the engine by causing the piston to move, and the case body of the auto starter device (1 ) And the outer wall of the holder (2) which is attached to the case body and holds the thermoelement at a predetermined position in the case body, and a gap (6) is provided between the inner wall and the outer wall of the holder (2). Auto starter system for an engine, characterized in that filled with liquid or solid insulation. 2. A thermal expansion body that expands and contracts due to a change in external temperature is built in one side, and a piston provided on the other side due to expansion and contraction of the thermal expansion body advances and retreats a thermoelement.
A heat generating means provided on the one side of the thermoelement for forcibly moving the piston, and energizing the heat generating means when the engine is started to heat the heat generating means and move the piston. In the auto starter device for closing the fuel supply port of the auxiliary fuel passage communicating with the air-fuel mixture passage for supplying the air-fuel mixture to the engine, the wiring (12) for supplying power to the heat generating means from the outside of the case body is used. The wire retaining ring (11) supported by the opening (1b) of the case main body and the wire extending from the wire retaining ring to the outside of the case main body are provided to the wire or the wire retaining ring in order to keep the heat. An automatic starter device for an engine, comprising: 3. The heat retaining means is provided on the wiring retaining ring (11),
Form an extension (11a ') protruding along each of the wirings (12) and cover the entire wiring with a protective tube (13'), weld the end of the protective tube on the connector (C) side, and seal the bag. The engine auto-starter device according to claim 2, wherein the auto-starter device is formed into a shape. 4. The engine auto-starter device according to claim 2, wherein the heat retaining means is extended along each of the wirings in the projecting portion (11 ″). 5. The heat retaining means covers the entire wiring projecting from the wiring retaining ring with a heat-shrinkable tube (15), and heat-shrinks the heat-shrinkable tube. The engine auto-starter device described in. 6. The heat insulating means covers a part or all of an exposed portion of the wiring from an outer wall edge of a body surrounding the wiring retaining ring with a heat insulating cover (16). The engine auto-starter device described. 7. The engine auto-starter device according to claim 6, wherein the heat insulating cover is a heat-shrinkable cover, and the heat-shrinkable tube is shrunk by heating. 8. A thermoexpansion body that expands and contracts due to an external temperature change is built in one side, and a piston provided on the other side due to the expansion and contraction of this heat expansion body is moved forward and backward with a thermoelement
A heat generating means provided on the one side of the thermoelement for forcibly moving the piston, and energizing the heat generating means when the engine is started to heat the heat generating means and move the piston. In the auto starter device for closing the fuel supply port of the auxiliary fuel passage communicating with the air-fuel mixture passage for supplying the air-fuel mixture to the engine, the heat generating means is fitted around the thermal expansion body on one side of the thermoelement. An auto-starter device for an engine, comprising a hollow ring-shaped heat generating element (4) and a pair of electrodes (10a, 10b) connected to the heat generating element. 9. The heat generating means is formed such that one side containing a thermal expansion body is tapered so that the outer diameter increases toward the other side, and is the same as one side of the thermoelement formed in the tapered shape. A hollow ring-shaped heating element (4) having an inner peripheral surface formed as a tapered surface having a gradient, and the heating element externally fitted in the vicinity of the thermal expansion body on one side of the thermoelement formed in the central portion are housed. Heating element housing (9b),
An electrode housing portion (9a) for housing one electrode (10a) formed in the inner wall surface and in contact with the outer peripheral surface of the heating element in the shape of a semi-circle,
An electrode housing portion (9b) for housing the other electrode (10b) formed on the bottom portion and in contact with one side of the thermoelement,
The heating element is covered from one side of the thermoelement,
It consists of a bottomed cylindrical storage holder (9) that stores one electrode and the other electrode, and that the other electrode stored in this storage holder and the heating element were connected so as to be able to conduct electricity. The auto starter device according to claim 8, which is characterized in that. 10. A thermal expansion body that expands and contracts due to a change in external temperature is built in one side, and a piston provided on the other side is forced forward and backward by a expansion and contraction of the thermal expansion body and the piston. Heat generating means provided on the one side of the thermoelement for moving the engine, the engine is started by energizing the heat generating means to heat the heat generating means and moving the piston. An auto-starter device for closing a fuel supply port of an auxiliary fuel passage communicating with a mixture passage for supplying a mixture to the heat insulating means according to any one of claims 2 to 7 and claim 8 or 9. The auto starter device for an engine according to claim 1, further comprising the heat generating means described above.