JPS6214361Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a vaporizer for snowmobiles.
This invention relates to a throttle valve closing device for a snowmobile carburetor, which forcibly closes the carburetor throttle valve when the throttle valve becomes unable to close due to freezing or the like.

Generally, a snowmobile has an accelerator lever attached to the handlebar, and by grasping and operating this lever with a hand, a throttle valve of a carburetor is opened and closed via a wire. By the way, since this snowmobile is used in a cold region, if the throttle valve does not close due to freezing, etc., or if the wire gets caught in the ice on the way and does not return, the accelerator lever will not close even if you release your hand. At the same time, the throttle valve of the carburetor does not completely return to the idle position and remains in an intermediate state, which causes the engine to maintain a high output and there is a risk that the snowmobile may run out of control.

Conventionally, as a countermeasure against this problem, the
There is a carburetor throttle valve antifreeze device disclosed in No. 54-38725. This system has a ring passage around the outer periphery of the carburetor body on which the piston-type throttle valve slides, through which heat-retaining fluid such as engine cooling water or exhaust gas circulates, and is used in winter in cold regions such as snowmobiles. This system is designed to insulate the carburetor body of an engine used in a device to prevent the throttle valve from freezing without changing the internal mechanism of the carburetor.

However, in the throttle valve antifreeze device shown in the above-mentioned Utility Model Application No. 54-38725, it is necessary to form and pipe a circulation path for heat-insulating fluid such as engine cooling water or exhaust gas around the outer periphery of the carburetor body. be.

Furthermore, as an example of the prior art for forcibly moving the throttle valve in the closing direction in the event of an abnormality in which the throttle valve does not return to the closing direction, a forced return device for a throttle valve described in Japanese Utility Model Application Publication No. 49-98636 is known. ing. This prior art example has a configuration in which an emergency push-down lever that forcibly pushes down and closes the throttle valve in the event of an abnormality in which the throttle valve does not return to the closing direction is connected to the rear wheel brake device via the lever and an emergency operation wire. be. However, in this prior art example, since the operating wire is connected to the rear brake device, in an emergency when the throttle valve does not return, the rear brake device must be operated, and therefore the throttle valve does not return. Since the rear wheel brake system is operated after determining that there is no brake, the time required to return the throttle valve is delayed, resulting in a longer idle distance. Furthermore, under normal conditions, the emergency activation push-down lever is always moved when the brake is operated.
A corresponding amount of brake operation force is required, and the brake operation force becomes heavy, resulting in poor operability.

The purpose of this invention was to take these circumstances into account. When the return spring cannot close the throttle valve due to freezing, etc., the solenoid motor is activated to extend the auxiliary spring and force the throttle valve to close. As a result, dangers such as the snowmobile running out of control can be avoided, and the solenoid motor is activated simply by releasing the throttle lever, so no operating force is required and operation is easy. An object of the present invention is to provide a throttle valve closing device for a snowmobile carburetor that can substantially eliminate idle running distance.

In order to achieve the above object, the throttle valve closing device for a snowmobile carburetor according to this invention is provided in a carburetor equipped with a piston-type throttle valve connected to an accelerator lever via a wire, and which closes the throttle valve in the throttle direction. A throttle valve return spring that is biased and an end plate that is biased toward the throttle valve by an auxiliary spring are provided, and the end plate is connected to a plunger of a solenoid motor via a wire, and the solenoid of the solenoid motor is connected to the plunger of the solenoid motor. A first switch and a second switch are interposed in parallel between the wire connections between the accelerator lever and the power source, the first switch being provided at a position facing the wire side end of the accelerator lever, and the second switch being provided at a position facing the wire side end of the accelerator lever. The accelerator lever is provided at a pin-side end portion of the accelerator lever, and the pin of the accelerator lever is fitted into an elongated hole of the mounting fitting, so that the position of the pivot point of the pin can be moved.

This invention will be specifically explained below with reference to the drawings.

1 and 2 show an embodiment of this invention. In these figures, reference numeral 1 denotes a snowmobile carburetor, and a piston-type throttle valve 4 is slidably disposed in a carburetor body 3 having a cap 2, and is adapted to adjust the opening degree of a ventilation passage 5. It is configured. A throttle valve return spring 6 is interposed between the throttle valve 4 and the cap 2, and an operating wire 8 whose one end is fixed to an accelerator lever 7, which will be described later, is fixed to the throttle valve 4. The accelerator lever 7
By pulling or relaxing the wire 8 in the operation, the throttle valve 4 is moved up and down in the carburetor body 3 against the tension of the return spring 6 or by the tension. ing.

Further, an auxiliary spring 9 is provided inside the return spring 6, and an end plate 9'
and the cap 2. One end of a wire 10 is fixed to this end plate 9', and the wire 10 extends outside the carburetor 1 and is fixed to a plunger 12 of a solenoid motor 11. Note that when the spring 9 is tensioned and compressed by the wire 10, the end plate 9' is configured so that it does not come into contact with the throttle valve 4 even when the throttle valve 4 is fully open; The throttle valve 4 is configured to be fully closed by being abutted against an end plate 9' by a spring 9. This solenoid motor 11 has a solenoid 14 equipped with a spring 13.
and the plunger 12, and when turned on, the plunger 12 is attracted into the solenoid 14 against the spring 13, and the wire 10 is pulled to contract the auxiliary spring 9 toward the cap 2 inside the carburetor body 3. and the solenoid 14 is turned off by the off operation.
The inner spring 13 causes the plunger 12 to project to the outside, relaxing the wire 10 and extending the auxiliary spring 9. The solenoid motor 11 is electrically connected to a magneto power generation mechanism 15 as shown in FIG. 1, and a first switch 16 and a second switch 17 are connected in parallel between the wire connections.

In FIG. 2, reference numeral 18 is a handle on the side of the snowmobile body, and an accelerator lever 7 is swingably attached to a mounting bracket 19 at the base of the handle 18 with a pin 20, opposite to the pin 20 of the lever 7. One end of the wire 8 from the carburetor throttle valve 4 is fixed to a remote position on the side, and by grasping the accelerator lever 7 with your hand and swinging it, the wire 8
The opening degree of the throttle valve 4 is adjusted by pulling or relaxing the throttle valve 4.

In the mounting bracket 19, the pin 20 of the accelerator lever 7 is fitted into a long hole 21 so that the pivot point of the pin 20 can be moved, and when idling, the accelerator lever 7 is pulled by the wire 8. to position the pin 20 below the elongated hole 21 and lower the entire accelerator lever 7, and when driving, use the hand grip of the accelerator lever 7 to position the pin 20 above the elongated hole 21, and lower the accelerator lever 7. It is configured to change its posture so that the entire body is lifted diagonally upward toward the mounting fitting 19 side. In the mounting bracket, a first switch 16 is provided at a position facing the wire side end 7a of the accelerator lever 7 during idling, and a second switch 17 is provided at a position facing the pin side end 7b during driving. ing.

In the figure, numeral 22 is a spark plug, and 23 is a wire tube.

In such a configuration, during normal idling, the accelerator lever 7 is pulled by the wire 8 (this wire 8 is pulled by the return spring 6), as shown by the solid line in FIG. In order to turn on the first switch 16 at the portion 7a, the solenoid motor 11 is turned on, the solenoid 14 is energized, and the plunger 1 is turned on against the spring 13.
2 into the solenoid 14 and pull the wire 10 to contract the auxiliary spring 9 toward the cap 2 inside the carburetor body 3. Next, when the accelerator lever 7 is grasped by hand and swung upward as shown by the dashed line A during driving, the accelerator lever 7 lifts up and releases the first switch 16 from the end 7a, and at the same time, the end 7a turns on. 7b, the second switch 17 is similarly turned on to maintain the on state of the solenoid motor 11 and to continue contracting the auxiliary spring 9. Therefore, the wire 8 is pulled in accordance with the swing angle of the accelerator lever 7, and the throttle valve 4 can be moved upward against the biasing force of the return spring 6.
At this time, the spring 9 is contracted and the end plate 9' does not touch the throttle valve 4, so the throttle valve 4 can slide without any problem.

When the throttle valve 4 freezes or the wire 8 gets caught during driving, when the accelerator lever 7 is released, the accelerator lever 7
does not swing downward in the lifted state, but descends to a free state as shown by the chain line B in FIG. Therefore, both the first switch 16 and the second switch 17 are turned off, the solenoid motor 11 is turned off, the solenoid 14 is demagnetized, and the spring 13 is turned off.
The plunger 12 protrudes to the outside, and the wire 1
0 to extend the auxiliary spring 9. Due to this extension of the auxiliary spring 9, the throttle valve 4, which is stopped midway inside the carburetor body 3, is abutted against the end plate 9' by the auxiliary spring 9, and is forcibly lowered by the extension force. It moves and closes, making it completely closed.

In this invention, in the above embodiment, two switches for turning on and off the solenoid motor 11 are connected in parallel, and the accelerator lever 7 is used to turn the solenoid motor 11 on and off. It may be one piece and manually operated independently.

As explained above, according to this invention, when the throttle valve does not close due to freezing or a wire getting caught, the auxiliary spring is expanded by the operation of the solenoid motor to forcibly close the throttle valve. In addition, the solenoid motor can be operated by simply releasing the accelerator lever; therefore, the solenoid motor is operated after determining that the throttle valve will not close, and other actions are required to close the throttle valve. Also, no operating force is required, and as a result, there is no time lag, and the distance traveled can be reduced, and there is an effect that safety can be achieved by avoiding dangers such as the snowmobile running out of control.

[Brief explanation of the drawing]

The figures show one embodiment of this invention, with FIG. 1 being an explanatory view showing a carburetor and an electric circuit diagram, and FIG. 2 being a side view showing a handle portion of a snowmobile. 1... Carburetor, 4... Throttle valve, 6... Return spring, 8... Wire, 9... Auxiliary spring, 10... Wire, 11... Solenoid motor, 7... Accelerator lever.

Claims (1)

[Scope of Claim for Utility Model Registration] A throttle valve return spring provided in a carburetor in which a piston type throttle valve is slidably disposed, and a throttle valve return spring provided to bias the throttle valve in a throttle direction, and a throttle valve return spring provided inside the return spring. an end plate that is biased toward the throttle valve by an auxiliary spring and forcibly closes the throttle valve; a mounting bracket having a long hole to which the accelerator lever is attached; and a mounting bracket fitted into the long hole of the mounting bracket. It is swingably attached to the mounting bracket via a pin, and the pin is fitted in an elongated hole so that the pivot point can be moved freely, so that it can be moved to an idling state position, a running state position, and a free state position. an accelerator lever that changes its posture; a wire connecting the throttle valve and the accelerator lever; and a solenoid connected to the end plate via a wire that is energized to pull the wire and apply the biasing force of the auxiliary spring. While resisting, the end plate is separated from the throttle valve, and the solenoid is demagnetized, causing the plunger to project and relax the wire, and the end plate is slid in the direction of the throttle valve by the biasing force of the auxiliary spring. A solenoid motor that fully closes the throttle valve is interposed in parallel between the connection between the solenoid of the solenoid motor and the power supply, and is turned on when the accelerator lever is in an idling position to excite the solenoid of the solenoid motor. , and a first switch that is turned on to similarly energize the solenoid of the solenoid motor when the accelerator lever is in the running position, and turned off to demagnetize the solenoid of the solenoid motor when the accelerator lever is in the free position. A throttle valve closing device for a snowmobile carburetor, characterized by comprising two switches.