JPS5830112Y2 - Automatic starting device for multiple carburetors - Google Patents

Description

[Detailed description of the invention] The present invention is an automatic system for a multiple carburetor that automatically opens and closes the starting valve according to the suction pipe negative pressure (and engine temperature, etc.) after the engine has started, and automatically adjusts the supplied air-fuel mixture. Relating to a starting device.

The carburetor is equipped with an automatic starting valve adjustment device that supplies a rich air-fuel mixture when starting the engine, and operates the starting valve according to the suction pipe negative pressure to dilute the supplied air-fuel mixture as the engine speed stably increases after the engine is started. An automatic starting device is the most effective automatic starting device for a carburetor, but the present invention does not require installing the above-mentioned starting valve automatic adjustment device to each carburetor in a multiple carburetor.
The starting valve automatic adjusting device is a starting valve automatic adjusting device having a negative pressure operating rod that is provided with a negative pressure that guides the negative pressure in the suction pipe and is slidably operated by the negative pressure in the negative pressure chamber, and the starting valve of each carburetor. A starting shaft of a horizontal device is provided, which fixes a starting valve actuating lever for opening and closing operations and is installed in communication with each carburetor, and the starting shaft is interlocked with the negative pressure actuating rod of the starting valve automatic adjustment device. By doing so, all of the multiple carburetors can be made into automatic starting device carburetors that automatically adjust the starting valves in accordance with the suction pipe negative pressure using the - starting valve automatic adjusting devices.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The automatic starting device according to the present invention will be explained with reference to an attached embodiment diagram.

This embodiment shows the automatic starting device according to the present invention for three sliding throttle valve type carburetors equipped with plunger type starting devices.

Plunger type starter device 11 for each carburetor body 1.2.3
, 12, 13, a starting shaft 4 is slidably mounted horizontally in communication with the outside of each carburetor 1, 2.3.

14, 15, and 16 are the starting shafts 4 provided in each carburetor.
This is the bearing.

The starting shaft 4 is equipped with starting devices 11, 12, 1 for the husband's carburetor.
The actuating levers 20, 21, 22 of the starting plunger actuating rods 17, 18, 19 of No. 3 are fixed.

An automatic starting valve adjustment device 5 is attached to the upper part of the central carburetor 2 (or to a bracket attached to the carburetor, or to an engine part other than the carburetor near the carburetor).

The automatic starting valve adjustment device 5 is connected to a suction pipe (not shown) through a negative pressure pipe 51, and is provided with a negative pressure chamber 54 having operating diaphragms 52 and 53.

The diaphragms 52 and 53 are normally tensioned by a coil spring 55 provided between them, that is, within the negative pressure chamber 54.

A bowl-shaped set plate 56 is attached to the diaphragm 53.

Further, a negative pressure operating rod 57 is attached to the outside of the diaphragm 52 (outside the negative pressure chamber 54).

Further, on the opposite side of the negative pressure chamber 54 of the diaphragm 53, there is provided a temperature-sensitive negative pressure chamber 58 that senses the engine temperature and communicates with the suction pipe through a negative pressure pipe 61 via a temperature-sensitive valve 6 that opens when the temperature rises and closes when the temperature falls. Although the diaphragm 53 is normally pressed toward the negative pressure chamber 54 by a spring 59, the diaphragm 53 is held in a fixed position by a restraining rod 60 fixed to the diaphragm 53.

The connecting lever 7 is pivotally supported on a pin 72 provided on a bracket 11 attached to the head of the carburetor 12, the upper tip of which rotatably supports the tip of the negative pressure operating rod 57, and the lower The tip engages freely with the starting shaft 4.

With the structure described above, when the engine is started, the negative pressure actuating rod 57 of the automatic starting valve adjustment device 5 is pushed by the spring 55 and fully protrudes outward (to the left in the figure), so that the engine starts. Move the shaft 4 to the right and move the starting plunger operating rod 1.
7, 18, 19 are fully opened by operating levers 20, 21, 22 (positions shown).

Therefore, if the engine is started in this state, a rich mixture for starting will be supplied to the engine, and when the engine starts, negative pressure will act on the suction pipe, so negative pressure will act on the negative pressure chamber 54 of the automatic starting valve adjustment device 5. Then, the diaphragm 52 is drawn toward the diaphragm 53, and the negative pressure operating rod 57 slides to the right, causing the starting shaft 4 to slide to the left.

The actuating lever 20, 21.22 therefore pushes the starting plunger actuating rod 17, 18, 19 to the left, slightly closing the starting plunger and diluting the feed mixture.

When the engine rotation becomes stable and the rotation speed increases, the suction pipe negative pressure (absolute value) increases, further diluting the air-fuel mixture.

However, since the diaphragm 53 is provided with a set plate 56, the diaphragm 52 is attached to the set plate 56.
It is held in a position where it is in contact with the tip of No. 6.

That is, the supplied air-fuel mixture is maintained at a constant concentration after startup.

Then, when the engine temperature rises and exceeds a certain temperature,
The temperature-sensitive valve 6 opens and the suction pipe negative pressure comes to act on the temperature-sensitive negative pressure chamber 58 of the automatic starting valve adjustment device 5, and the diaphragm 53
(actuates to the right), thus actuating the diaphragm 52 to the right and starting plunger actuating rods 17, 18, 1.
9 to the left to dilute the supplied mixture, and the starter pusher is fully closed to make the supplied mixture a normal mixture.

The above embodiment is a case of a multiple carburetor with three sliding throttle valve type carburetors, and the starting valve device is a Granger type starting valve device, but the number of carburetors may be any number. Of course, it can be implemented in the same manner in the case of a butterfly throttle valve type carburetor, and in addition, when the starting valve device is a butterfly type starting valve, the leftward operation of the starting shaft 4 (starting valve automatic adjustment device 5) The actuating levers 20, 21, 22 may be connected to the starting valve shafts so that the starting valve opens when the negative pressure in the negative pressure chamber 54 is applied.

As described above, according to the device according to the present invention, the starting valves of all the multiple carburetors are controlled by the - starting valve automatic adjustment devices.
It can be automatically adjusted according to the negative pressure in the suction pipe, making it advantageous to install a multiple carburetor in the engine with an automatic adjustment type of starting valve based on the negative pressure in the suction pipe, and also making it inexpensive to manufacture. It's something you get.

[Brief explanation of the drawing]

The attached drawings show an example of a triple sliding throttle valve type carburetor equipped with a plunger type starter equipped with an automatic starter according to the present invention. 1.2, 3... Carburetor main body, 4... Starting shaft, 5... Starting valve automatic adjustment device, 11, 12
, 13... Starting device, 20.21.22...
...Actuation lever, 57...Negative pressure actuation rod.

Claims (1)

[Scope of utility model registration request] The starting shaft of a single or integrally connected horizontal device that fixes the operating lever that opens and opens the starting valve of each carburetor and is installed over all carburetors, and the negative pressure that slides due to the negative pressure in the suction pipe. A starting valve automatic adjustment device equipped with a guard rod is provided, and the starting shaft and the negative pressure operating rod are interlocked to adjust the opening and closing of the carburetor starting valve in accordance with the operation of the negative pressure operating rod. An automatic starting device for a multiple carburetor characterized by: