Fuel injector of engine for models and engine for models incorporated

Abstract

In a fuel injector magnetic core is inserted in the solenoid coil in the box. The fuel feeding passage is provided in the magnetic core. The movable valve body which moves up to the magnetic core magnetically is provided in the box. The valve body has a flow passage which communicates to the feeding passage. The valve body is forced to be pressed by the plate spring so as to be in contact with the valve box so as to close the fuel injection orifice. The check valve is provided on the fuel feeding passage. An air pressure of about 20 to 100 kPa generated in the crank chamber of the engine is applied to fuel in the box through the diaphragm. Fuel is introduced into the fuel injector without pressurization and confined by the check valve, and the fuel is pressurized using air which is not affected very much by the force due to acceleration. Fuel is fed stably even under severe operational conditions, the engine will not stall due to insufficient or excessive feeding of fuel. The fuel injector injects fuel in the movement direction of the model plane. The fuel injector is located ahead of the pressurized fuel tank in the movement direction of the model plane. The fuel injector is provided with the over pressure control valve for releasing the fuel to the outside when the internal fuel pressure increases and the negative pressure control valve for introducing the air pressure in the fuel tank into the internal when the internal fuel pressure decreases.