JPS6111490Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an accelerator pump for a vaporizer that can prevent the generation of vapor.

In conventional accelerator pumps, the check valve on the discharge side closes when the engine stops, so the steam generated inside cannot escape, causing bubbles to form in the pump chamber and causing the accelerator pump to operate with that steam. There were disadvantages in that the vapor was discharged and no fuel came out, or the vapor acted as a damper and sufficient discharge pressure could not be secured and several operations were required to restore the complete state.

In view of the above-mentioned problems, the present invention aims to provide an acceleration pump in which a check valve on the discharge side is automatically opened when the engine is stopped, allowing municipal steam to escape from the pump nozzle, thereby preventing the generation of vapor. However, this will be explained based on an embodiment illustrated below. 1 is an intake cylinder of a carburetor, 2 is
3 is the throttle valve, 3 is the acceleration pump body linked to the throttle valve 2, and 4 is the acceleration pump body 3.
An inlet check valve 5 is provided in the suction side passage 3a of the acceleration pump body 3, and 5 is the discharge side passage 3 of the acceleration pump body 3.
b is a pump nozzle provided at the open end on the side of the intake cylinder 1; 6 is an outlet check valve provided in the discharge side passage 3b and has a pump weight 6a made of a permanent magnet; 7 is an engine key (not shown);
When the engine key is turned OFF, the pump weight 6a is repelled by the magnetic field generated in the iron core 7a when the engine key is turned on, and is demagnetized to attract the pump weight 6a to the iron core 7a, thereby opening the outlet check valve 6. This is a solenoid that is designed to open the valve.

Since the acceleration pump according to the present invention is constructed as described above, when the engine key is turned on, the magnetic field generated in the solenoid 7 causes the pump weight 6a to
is repelled and becomes a seated state. However, the seating force of the pump weight 6a at this time is naturally set to be much smaller than the fuel discharge pressure from the acceleration pump body 3, so when the acceleration pump body 3 performs the discharge operation, the pump weight 6a is pushed up. The outlet check valve 6 is opened. Therefore, when the engine is put into operation, the accelerator pump of the present invention is operated in conjunction with the throttle valve 2 in exactly the same way as the conventional accelerator pump. On the other hand, when the engine key is turned OFF, the engine naturally stops, but the solenoid 7 is also demagnetized, so the pump weight 6a is moved by its own magnetic force to the iron core 7.
a, automatically opens the outlet check valve 6, and maintains this state. Therefore,
Even if steam is generated within the accelerator pump body 3, the steam immediately escapes from the pump nozzle 5, making it easier for new fuel to flow in through the inlet check valve 4, thereby preventing the generation of vapor.

As described above, the accelerator pump according to the present invention has a very important advantage in practice that it can automatically prevent the generation of vapor.

[Brief explanation of the drawing]

The drawing is a vertical sectional view of an embodiment of a vaporizer accelerator pump according to the present invention. 1... Intake cylinder, 2... Throttle valve, 3...
...Acceleration pump body, 3a...Suction side passage, 3b...
...Discharge side passage, 4... Inlet check valve, 5... Pump nozzle, 6... Outlet check valve, 6a... Pump weight, 7...
Solenoid, 7a...iron core.

Claims (1)

[Scope of utility model registration request] An outlet check valve having a pump weight made of a permanent magnet, which is energized when the engine is running to repel the pump weight and make it sit, and when the engine is stopped, is demagnetized to attract the pump weight to the iron core. and a solenoid adapted to open the outlet check valve.