JP2603092Y2 - Choke structure of internal combustion engine - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a choke structure for an internal combustion engine.

[0002]

2. Description of the Related Art A backpack working machine such as a backpack type power spreader is equipped with an internal combustion engine such as an air-cooled two-cycle gasoline engine as a power source. The internal combustion engine includes, for example, a manual start type using a recoil starter and an automatic start type equipped with an automatic starter device.

Conventionally, in a backpack working machine equipped with an internal combustion engine equipped with an auto starter device, an operator operates the auto starter device while carrying a body portion including the internal combustion engine to carry out the internal combustion engine. When starting the engine, since the operation of the manual choke lever provided on the aircraft body is difficult to reach and is difficult to access, by providing a separate choke remote control device,
The choke was remotely controlled.

[0004]

However, in the conventional method using the remote control device, there are cases where the reliability of the operation of the choke is poor, and the starting failure of the internal combustion engine is likely to occur. Was.

The present invention has been made in view of such circumstances , and it is possible to reliably start an internal combustion engine by an automatic starter device and to manually operate the internal combustion engine.
It is an object of the present invention to provide a choke structure for an internal combustion engine, which can be manually operated at the time of starting .

[0006]

In order to solve the above problems SUMMARY OF THE INVENTION The present invention according to claim 1 is a choke structure for starting an internal combustion engine capable of at Rutotomoni manually with <br/> auto starter A choke, a rotary solenoid that automatically closes the choke for a predetermined time when the auto starter device is operated, and automatically opens the choke after the predetermined time has elapsed, and manually controls the internal combustion engine. When starting with
A manual choke lever for manual operation of the
The front is provided between the moving choke lever and the choke
The choke is automatically activated by the rotary solenoid.
When the opening and closing operation is performed, the manual choke lever is
And a play space to make it inoperative, and the play space is
A fitting hole formed in a rotating shaft portion of the choke,
An engagement shaft portion inserted into the fitting hole of the manual choke lever
And between.

Further, the choke structure for an internal combustion engine according to the present invention according to claim 2, automatic choke, the choke
A rotary solenoid that opens and closes
A manual choke lever for manual operation of the
The front is provided between the moving choke lever and the choke
The choke is automatically activated by the rotary solenoid.
When the opening and closing operation is performed, the manual choke lever is
And a play space to make it inoperative, and the play space is
A fitting hole formed in a rotating shaft portion of the choke,
An engagement shaft portion inserted into the fitting hole of the manual choke lever
And between.

[0008] 請 choke structure for an internal combustion engine according to the present invention described in Motomeko 3, there is provided a connector described in claim 1 or 2, wherein the choke of closing by the rotary solenoid
It has a timer relay for controlling the operating time.

According to a fourth aspect of the present invention, there is provided a choke structure for an internal combustion engine according to the first, second or third aspect, wherein the rotary solenoid is a return spring.
It is a rotary solenoid equipped with .

[0010]

According to the first aspect of the present invention, the choke is automatically closed for a predetermined time by the rotary solenoid simultaneously with the operation of the auto starter device. Therefore, the intake air amount is reduced, and a rich air-fuel mixture is formed, so that the internal combustion engine can be reliably started even in cold weather. Then, when the predetermined time has elapsed, the choke is automatically opened by the rotary solenoid.

Further , according to the present invention described in claim 1,
The internal combustion engine can be started automatically
Alternatively, the internal combustion engine can be started manually,
The starting method of the internal combustion engine according to the situation of
Can be. Moreover, when the automatic starting method is selected
The choke automatically opens and closes,
If the start method is selected, the manual
The choke is manually opened and closed by the choke lever.
If you select any starting method,
Even in this case, the internal combustion engine can be reliably started. Sand
That is, when the internal combustion engine is automatically started,
Due to the action of the play space, the manual choke lever operates.
Does not work. Therefore, when the internal combustion engine is started automatically.
The closing operation is performed by the rotary solenoid.
The choke moves the manual choke lever to the operating position.
Closed by position holding action to hold
There are no inconveniences such as being left.

Further, according to the present invention as set forth in claim 1,
If the play space is formed in the pivot of the choke
And the fitting hole of the manual choke lever
Since it is provided between the engagement shaft portion inserted into the
Connection between the manual choke lever and the choke
Is compact, and therefore the internal combustion engine is mounted.
It can also contribute to downsizing of the entire equipment to be mounted.
You.

[0013] In the present invention as set forth in claim 2, the present invention also provides
The play space has the same function and effect as described above.

[0014] According to the present invention as set forth in claim 3, the b)
Control of the closing operation time of the choke by a rotary solenoid
The control is performed by the timer relay. Therefore,
When the choke is closed by the rotary solenoid
The interval can be set arbitrarily.

[0015] According to the present invention as set forth in claim 4, the b.
By the return spring of the solenoid
The choke is automatically opened. Therefore,
Simplified configuration and can contribute to cost reduction
You.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a partially omitted exploded perspective view showing a choke structure of an internal combustion engine for a backpack working machine according to one embodiment of the present invention, FIG.
FIGS. 3A and 3B are explanatory diagrams showing an open / closed state of a choke by a rotary solenoid, and FIGS. 3A and 3B are FIGS.
FIGS. 3A and 3B are explanatory diagrams showing a state of a manual choke lever corresponding to FIGS. 3A and 3B, FIG. 3C is an explanatory diagram showing a choke closing operation state by a manual choke lever, and FIG. It is a whole perspective view of a power spreader.

First, referring to FIG. 4, the power spreader includes an internal combustion engine 20 such as an air-cooled two-cycle gasoline engine as a power source, a blower 21 which is driven to rotate by the internal combustion engine 20, and a power source. It comprises a medicine tank 22 arranged above the blower 21, a fuel tank 23 arranged below the internal combustion engine 20, a carburetor 1, an air cleaner 2, and the like. The internal combustion engine 20
Can be automatically started by the auto starter device 15 or manually started by the recoil starter 17.

The carburetor 1 is mounted on the internal combustion engine 20.
For example, a float type or a diaphragm type disposed between the fuel tank 23 and the oil-mixed gasoline supplied from the fuel tank 23 and the purified air supplied from the air cleaner 2. Are mixed to create an air-fuel mixture required for the operation of the internal combustion engine 20.

Next, referring to FIG. 1, the air cleaner 2 includes a main body 2a adjacent to the carburetor 1 and a lid 2b adapted to the main body 2a. The body 2b is adapted to the main body 2a and accommodates a filter element (not shown).

In the main body 2 a of the air cleaner 2, an air flow path 3 serving as a flow path of purified air to the carburetor 1 is formed.

The yoke 4 disposed in the air cleaner 2 has a cylindrical rotation support shaft portion 5, 6 projecting outward from the lid 2b and the main body 2a of the air cleaner 2. I have one. The choke 4 is rotatably supported by the air cleaner 2 by the pivot shaft portions 5 and 6. A choke piece 4a is formed on the rotating tip side of the choke 4, and the choke piece 4a
The air flow path 3 is opened and closed.

In the rotation support shaft portion 5 of the choke protruding outward from the lid 2b of the air cleaner 2,
A rotary shaft 11 of a rotary solenoid 7 with a return spring is inserted. The energization time to the rotary solenoid 7 is controlled by a timer relay 8.
The timer relay 8 and the rotary solenoid 7 are connected to the auto starter device 15 via a power line 9. Although not shown in detail, the auto starter device 15 includes a starter controlled by a starter switch 16, a battery, and the like.

On the other hand, the main body 2 of the air cleaner 2
The engagement shaft portion 13 of the manual choke lever 10 is inserted into the rotation support shaft portion 6 of the choke 4 protruding outward from a.

As shown in FIG. 2, the cross-sectional shape of the rotary shaft 11 of the rotary solenoid 7 and the shape of the fitting hole 12 of the rotary support shaft portion 5 of the choke 4 on the rotary solenoid 7 side are mutually different. They have a matching semi-circular shape and are integrally engaged. Therefore, the rotation of the rotary shaft 11 of the rotary solenoid 7 is directly transmitted to the choke 4 via the rotation support shaft portion 5, whereby the choke 4 is driven to open and close. In FIG.
(A) shows a state where the choke 4 is opened by the rotary solenoid 7, and (B) shows a state where the choke 4 is closed by the rotary solenoid 7.

On the other hand, as shown in FIG.
The fitting hole 14 provided in the rotation support shaft portion 6 on the side of the manual choke lever 10 is semicircular, whereas the engagement shaft portion of the manual choke lever 10 inserted into the fitting hole 14 13 has a sector shape that is smaller than the semicircle of the fitting hole 14 by a predetermined angle. As a result, a play space S is formed between the fitting hole 14 and the engagement shaft 13. The play space S is for disabling the manual choke lever 10 when the choke 4 is automatically opened and closed by the rotary solenoid 7.

In FIG. 3, (A) shows the state of the manual choke lever 10 corresponding to FIG. 2 (A), that is,
2 shows a relationship between the choke 4 and the manual choke lever 10 when the choke 4 is opened by the rotary solenoid 7. FIG. 3B shows the state of the manual choke lever 10 corresponding to FIG. 2B, that is, the choke 4 and the manual choke lever when the choke 4 is closed by the rotary solenoid 7. 10 is shown. As is clear from these figures, since the play space S is provided, the choke 4 by the rotary solenoid 7 is formed.
Irrespective of the opening and closing drive of the manual choke lever 10
The engaging shaft portion 13 is immovable, and thus the manual choke lever 10 is immovable. That is, the opening / closing operation of the choke 4 by the rotary solenoid 7 is not transmitted to the manual choke lever 10 side.

FIG. 3C shows a state in which the choke 4 is closed by operating the manual choke lever 10. At this time, the rotating shaft 11 of the rotary solenoid 7 that is not energized rotates together with the choke 4.

In the above configuration, when the internal combustion engine 20 is started by the auto starter device 15, the operator turns on the starter switch 16. Then, the auto starter device 15 operates, and a predetermined time (for example,
Power is supplied to the rotary solenoid 7 for 1 to 3 seconds. As a result, the rotary shaft 1 of the rotary solenoid 7
1 is driven, and the choke 4 is closed. Therefore, the amount of intake air by the internal combustion engine 20 decreases,
Since the rich mixture is temporarily supplied to the internal combustion engine 20, the internal combustion engine 20 can be reliably started even in cold weather.

When the predetermined time has elapsed, the operation of the timer relay 8 for controlling the closing operation time of the choke 4 by the rotary solenoid 7 causes the power supply to the rotary solenoid 7 to be cut off, and the rotary solenoid to be turned off. 7 is returned to the original state by the return spring, and the choke 4 is automatically opened via the rotary shaft 11.

When the choke 4 is opened and closed by the rotary solenoid 7, the manual choke lever 10
Is immovable.

On the other hand, when the internal combustion engine 20 is to be started manually, the operator swings the manual choke lever 10 to the state shown in FIG. After closing 4, the start operation of the internal combustion engine 20 may be performed using the recoil starter 17.

[0033]

According to the present invention as set forth in claims 1 to 4,
For example, both automatic and manual starting of the internal combustion engine
Can be performed selectively according to the situation at that time.
Even if the start method of misalignment is selected, ensure that the engine starts
In addition to the manual choke lever and choke
The structure of the connection between the
Contributes to the downsizing of the whole equipment on which
Can be.

Furthermore, according to the present invention as set forth in claim 3,
For example, when the choke is closed during automatic start of the internal combustion engine
There is an advantage that the interval can be set arbitrarily.
According to the invention, the configuration is simplified, which also contributes to cost reduction.
This has the effect of being able to

[Brief description of the drawings]

FIG. 1 is a partially omitted exploded perspective view showing a choke structure of an internal combustion engine for a backpack working machine according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing an open / closed state of a choke by a rotary solenoid.

FIG. 3 is an explanatory view showing an open / closed state of a choke by a manual choke lever.

FIG. 4 is an overall perspective view of a power spreader as an example of a backpack working machine.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 4 Choke 6 Rotating support shaft part 7 Rotary solenoid (rotary solenoid with return spring) 8 Timer relay 10 Manual choke lever 13 Engagement shaft part 14 Compatible hole 15 Auto starter device 20 Internal combustion engine S Play space

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ identification code FI F02M 1/08 F02M 1/08 A (58) Investigated field (Int.Cl. ⁷ , DB name) F02M 1/02 F02M 1 / 08-1/14 F02D 11/04 F02D 11/10

Claims (4)

(57) [Scope of request for utility model registration] [Claim 1] When Ru an auto starter (15)
Both are choke structures of an internal combustion engine (20) that can be manually started , and the choke (4) and the choke (4) are automatically closed for a predetermined time when the auto starter device (15) is operated. rotary solenoid allowed to automatically opening operation the choke (4) after the elapse the predetermined time with allowed to operate as (7), the internal combustion engine
When manually starting (20), use the choke
Manual choke lever (1) for manual operation of (4)
0), the manual choke lever (10) and the choke
(4) provided between the rotary solenoid
The choke (4) is automatically opened and closed by (7).
When being squeezed, push the manual choke lever (10)
A play space (S) for disabling the play space.
The interval (S) is placed on the pivot (6) of the choke (4).
The fitting hole (14) formed and the manual choke lever
(10) An engaging shaft portion inserted into the fitting hole (14).
(13), a choke structure of the internal combustion engine provided between the two . 2. A choke (4) and said choke (4)
Rotary solenoid that automatically opens and closes (7)
And a manual choke for manually operating the choke (4).
And the manual choke lever (10).
And the choke (4) and the rotary
The choke (4) is automatically activated by the solenoid (7)
The manual choke lever is
And (10) a play space (S) for disabling (10).
In addition, the play space (S) is supported by the pivot of the choke (4).
A fitting hole (14) formed in the shaft (6) and the manual switch
Inserted into said fitting hole (14) of the yoke lever (10)
Of the internal combustion engine provided between the engagement shaft portion (13)
Chalk structure. 3. The front by said rotary solenoid (7).
Timer relay for controlling the closing operation time of the choke (4)
The internal combustion engine according to claim 1 or 2, comprising: (8).
Institutional chalk structure. 4. The return solenoid according to claim 1, wherein said rotary solenoid is a return sprocket.
Claim: A rotary solenoid with ring (7).
4. The choke structure for an internal combustion engine according to 1, 2, or 3.