Ntn Toyo Bearing Co., Ltd.

Yoshinobu Yasuda

Kei Kimata

Tsugito Nakazeki

Isamu Yoshida

Masahiro Saruta

Ikuo Kinashi

Taugito Nakazeki

Saburo Ohshima

Yoshihiro Matsumoto

An air/fuel ratio compensating device is provided for association with an internal combustion engine having a fuel control valve, air suction pipe means and pedal accelerator means, the compensating device including an area flow metal system made up of a flow detection valve positioned upstream in the air suction pipe means and operatively associated with the fuel control valve, a flow control valve positioned downstream in the air suction pipe means in series with the flow detection valve and being operatively connected to the accelerator pedal means, the area flow meter system enabling the difference in pressure existing on opposite sides of the flow detection valve to be maintained at a predetermined value to insure that the amount of air flow is proportional to the opening area of the flow detection valve thus permitting a determination of the amount of air flow on the basis of the opened area of the flow detection valve, a feedback control mechanism for controlling the area control flow meter and including pressure sensitive amplifier means to detect and amplify the deviation of the difference in pressure, valve opening means connected to the amplifier means and operatively associated with the flow detecting valve for opening and closing the flow detection valve by the output from the amplifier means, and compensating means for compensating for the set value placed in the pressure sensitive amplifier means according to the operating conditions of the internal combustion engine.

Air flow measuring device for internal combustion engines

A fuel flow rate measuring device comprising a control rod axially movable in proportion to the rate of flow of air flowing through a suction pipe, a ball disposed in a taper bore and adapted to be moved in the taper bore by the control rod, the taper bore and the ball cooperating with each other to define a clearance which is variable in proportion to the rate of flow of the air, and a pressure regulator provided between a fluid inlet and outlet for keeping constant the fluid pressure difference across the clearance defined by the taper bore and ball.

Fuel flow rate measuring device

A gas flow measuring mechanism having a feedback control mechanism comprising a flow detection valve and a flow control valve which are in series with each other and placed in a channel, an area flowmeter for keeping constant the difference in the pressures existing on opposite sides of said flow detection valve and determining the amount of incoming air by the opening area of the flow detection valve, a pressure-sensitive amplifier mechanism for sensing the deviation of the difference in the pressures existing on opposite sides of the flow detection valve from a set pressure difference on the basis of the displacement of a pressure setting diaphragm, and a valve opening mechanism for controlling the opening and closing of the flow detection valve, wherein a bellows enclosing a gas at a reference temperature and under a reference pressure and having an effective area equal to (effective area of pressure difference setting diaphragm).times.(reference pressure difference at a reference temperature and under reference pressure).div.(pressure of enclosed gas) is interlocked to the pressure difference setting diaphragm so as to make density compensation.

A continuously operable fuel injection device comprises a sleeve having a substantially triangular measuring window communicating with the outlet port of a main body, the sleeve being inserted in the cavity of the main body, and a control spool having an annular groove communicating with the inlet port of the main body through an axially extending hole and axially slidably inserted in the sleeve, the substantially triangular measuring window cooperating with the annular groove of the control sleeve to form a variable orifice. By axially sliding the control spool, any desired flow rate can be obtained.

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Iwata, Japan

Yoshinobu Yasuda