Aisan Kogyo Kabushiki Kaisha

Other

Toyota Jidosha Kogyo Kabushiki Kaisha

Akira Tokuda

Shigetaka Takada

Ryozo Ito

Hitoshi Hirano

Kastuyoshi Fukaya

Yoshiro Iwama

A method for controlling the air-fuel ratio in a carburetor which prevents fuel from flowing into an air bleed passage at nearly fully closed position of the tapered needle valve fitted with the air bleed passage by controlling the step motor connected to the needle valve so as to maintain the minimum amount of bleed air at a constant level. In another aspect, at nearly fully closed position of the needle valve, this invention is effective to prevent fuel from flowing into the air bleed passage by continously driving the step motor in a direction of its fully closed position to axially vibrate the needle valve so that the minimum amount of bleed air may be maintained at a constant level. In a further aspect, at nearly fully closed position of the needle valve, this invention is effective to determine the relation between the amount of stroke of the needle valve and the amount of bleed air to flat characteristics by continuously driving the step motor in a direction of the fully closed position of the needle valve so that the minimum amount of bleed air may be maintained at such a level that the fuel is prevented from flowing into the air bleed passage.

Method for controlling the air-fuel ratio in a carburetor of an internal

A method of driving a valve in an injector for an internal combustion engine which intermittently injects liquid fuel by the valve reciprocally moving by attraction force of a solenoid coil and repulsive force of a spring and an apparatus for carrying out the method. An armature secured to the valve to be attracted by the solenoid coil and/or an iron core of the solenoid coil is made of a permanent magnet. The pulse shape of an electric current to be applied to the solenoid coil is made in the form of a stepped wave in which the electric power in the initial stage of application is larger than that in the later stage. An inverse pulse for inversely exciting the solenoid coil is formed to give the permanent magnet of the armature repulsive force upon fall of the pulse wave of the electric current applied to the solenoid coil.

Fuel injector for an internal combustion engine

A carburetor for use with a stratified charge rotary piston engine including a first supply system having a main fuel supply system and a slow/idle fuel supply system and adapted to supply a fuel-air mixture and a second supply system adapted to supply only air, wherein a second slow/idle supply system is provided to supply an additional fuel when an engine is operating in a slow speed or idling condition and/or the exhaust gas temperature of the engine is below a predetermined value.

Carburetor

Growing community of inventors

Nagoya, Japan

Akira Tokuda