JPH0313464U - - Google Patents

Description

[Brief explanation of drawings]

Fig. 1 is a schematic sectional view showing a first embodiment of the multi-point fuel injection device according to the present invention, Fig. 2 is a schematic sectional view of the pressure dividing means, and Fig. 3 is the relationship between intake manifold pressure and adjusted fuel pressure _Pb . FIG. 4 is a diagram showing the relationship between the adjusted fuel pressure P _b and fuel injection amount Q ₆ , FIG. 5 is a diagram showing the relationship between intake manifold pressure and fuel flow rate, and FIG. 6 is a diagram showing the relationship between the intake manifold pressure and fuel flow rate. 7 is a schematic sectional view of the adjusting means; FIG. 8 is a sectional view of the essential parts showing the third embodiment of the present invention; FIG. 9 is a schematic sectional view of the adjusting means;
The figure is a cross-sectional view of the main part showing the fourth embodiment of the present invention.
Fig. 1 is a sectional view of a main part showing a fifth embodiment of the present invention, Fig. 12 is a schematic sectional view of a multi-point fuel injection device according to the prior art, diagrammatically showing a fuel flow path, and Fig. 13 is a sectional view of a main part of a fifth embodiment of the present invention. FIG. 3 is a schematic cross-sectional view of a constant flow rate supply means of FIG. 1...First channel, 2...First jet, 3...
First constant flow rate supply means, 12...Second flow path, 1
4...Fuel injection valve, 16...Upper chamber, 17...Lower chamber, 21...Third flow path, 22...Third jet, 2
3...Fourth jet, 24...Second constant flow rate supply means, 26...First fuel pressure regulator, 31...
...Pressure dividing means, 44...Fifth jet, 45...First solenoid valve, 48...Control unit, 50
... second jet, 51 ... second fuel pressure regulator, 53, 61 ... adjusting means, 64 ... sixth jet, 66 ... third solenoid valve.

Claims (1)

[Claims for Utility Model Registration] (1) A first flow path through which fuel supplied from the first fuel pressure regulator passes through the first jet and is returned as a constant fuel flow rate by the first constant flow rate supply means. The fuel is branched from the first flow path between the first constant flow rate supply means and the first jet, and the fuel is returned via the second jet and a second fuel pressure regulator having a lower set pressure than the first fuel pressure regulator. and an upper chamber provided for each cylinder to which the fuel pressure of the flow path on the downstream side of the first jet or the upstream side of the second jet is applied, respectively, injects fuel. The fuel injection valve is partitioned by a lower chamber and a diaphragm, and the fuel supplied from the first fuel pressure regulator is branched for each cylinder and introduced into the lower chamber via a third jet, respectively. a third flow path in which a constant fuel flow rate is returned from the second constant flow rate supply means via a fourth jet; and a third flow path in which the intake manifold pressure is divided according to the engine speed and applied to the first fuel pressure regulator; A multi-point fuel injection device comprising: a partial pressure means for controlling a set pressure; and a control unit for measuring engine rotational speed and controlling the partial pressure means. (2) The pressure dividing means includes a third fuel pressure regulator to which intake manifold pressure is applied, a fourth fuel pressure regulator having a lower set pressure than the third fuel pressure regulator, and a fuel pressure regulator that communicates with the third and fourth fuel pressure regulators. A passageway, a fifth jet provided in the passageway, and a first electric opening area adjusting means for adjusting an opening area of the passageway according to the engine speed, and the fifth jet and the first The multi-point fuel injection device according to claim (1) of the utility model registration, characterized in that the fuel pressure between the electrical opening area adjusting means and the first fuel pressure regulator is applied to the first fuel pressure regulator. (3) Scope of Utility Model Registration Claim (1) characterized in that, in place of the first constant flow rate supply means, a sixth jet communicating the first flow path and the second constant flow rate supply means is provided. ) or the multipoint fuel injection device described in (2). (4) Utility model registration claim (1) characterized in that an azimuth and means for supplying a constant flow rate with a variable set value are arranged in the flow path downstream of the first jet or upstream of the second jet. The multi-point fuel injection device according to any one of ) to (3). (5) Utility model registration claims (1) or (2) characterized in that adjusting means for returning the constant flow rate and the constant flow rate with a variable set value is arranged in place of the first constant flow rate supply means. The multi-point fuel injection device described in . (6) A passage bypassing the sixth jet,
The multi-point fuel injection device according to claim (3), which is a registered utility model, characterized in that a second electrical opening area means is provided as an adjusting means for returning the constant flow rate to a variable set value. (7) A utility model characterized in that adjusting means for supplying a constant flow rate with a variable set value is disposed in the fuel passage between the fifth jet of the pressure dividing means and the first electrical opening area adjusting means. Scope of registration claims (2)
The multi-point fuel injection device described in .