SU1359469A1 - Fuel supply system - Google Patents

Abstract

The invention makes it possible to increase efficiency and reduce fuel by-passes while maintaining a continuous supply of fuel at a constant pressure. In the valve body 8, the spring-loaded spool 9 and the fuel accumulator 15 with the inlet port 16 are not adjusted. The accumulator 15 is placed in the backward cavity, released by the spool when it moves from the top position to the lowest position, and communicates with the pump discharge line 6 behind the pressure valve 5. In the pressure valve, the fuel acts on the upper end of the spool 9 and begins to move it, compressing the spring 12. A supply of compressed fuel forms in the accumulator 15, the volume of which is limited by the overflow opening 10 associated with the suction line II. At the moment of the start of the fuel transfer to line 11, the injection stroke is completed and under the action of the spring 12, the spool 9 closes the opening 10 and begins to force the fuel to the injector 7 during the entire suction stroke. 2 Il. € (L pue.Z

Description

a structure for use in fuel systems with a continuous supply of fuel with a constant fuel pressure to the nozzle, in particular in fuel systems of heaters and heaters of automobile engines.

The aim of the invention is to increase

improvement of efficiency and reduction of fuel by-pass while maintaining a continuous supply of fuel at constant power.

FIG. 1 is a schematic diagram of the fuel supply system; in fig. 2 is a schematic diagram of fuel supply systems;

The fuel supply system contains a single-plunger pump with a cam 1, under the action of which the suction valve 2, which is loaded with pin 3 and is installed inside the plunger 4, opens. with a spring-loaded spool 9 disposed therein, an overflow port 10 communicated with the pump suction line 11, a return spring 1 2 of the spool 9. The suction valve 2 is equipped with a rod 13, and the discharge valve 5 has a spring 14. the housing 8 is placed accumulator 15 the fuel c- inlet cavity 16. The spring body 8 of the spool 9 is provided with a drain hole 17.

The system works as follows.

When the cam 1 rotates, the suction valve 2 opens. Under the action of the spring 3, the plunger 4 moves and the fuel is sucked. Upon completion of the suction stroke under the action of the cam I, the plunger 4 compresses the spring 3 and the fuel present here opens the discharge valve 5 The fuel begins to flow through the discharge line 6 to the nozzle 7 and into the accumulator 15 placed in the pressure valve body 8. In the pressure valve housing 8, the fuel acts on the upper end of the spool 9 and begins to move it, compressing the spring 12 and forming a supply of compressed fuel in the accumulator 15, the volume of which is limited by the bypass opening 10 connected to the suction line 11. By

when the excess fuel starts to bypass the bypass hole 10 into the suction line and the injection stroke turns, the spool 9 will block the bypass opening 10 under the action of the spring 12 and displace fuel to the nozzle 7 during the entire stroke

suction,

With a specific prototype version of the system for a centrifugal nozzle with a flow rate of 15 kg / h at a pressure of 22 + 0.2 kgf / cm, the opening of the suction valve 2 during the rotation of the cam 1 was forced by the valve 13 (see Fig. 2) during the suction stroke and closing discharge valve 5 was produced by a spring 14.

The elements of the system had the following dimensions: the diameter of the suction valve is 2-10 mm; the diameter of the discharge valve 5-6.5 mm; the plunger 4 with a diameter of 10 mm; rod 13 with a diameter of 6 mm; 9 spool with a diameter of 5 mm; distance to the bypass hole 10 5.5 tO, l mm; The diameter of the bypass hole is 1 mm.

Thus, the considered system provides an increase in efficiency and a decrease in fuel by-passes while maintaining a continuous supply of fuel at constant pressure.

Claims (1)

Invention Formula A fuel supply system comprising a nozzle, a single-pump pump with a pressure valve connected to it, with a pressure valve, a fuel accumulator and a pressure control valve in the battery connected to the pump, arranged as a pump. in a housing with inlet and bypass openings of a spring-loaded spool, characterized in that, in order to increase efficiency and reduce fuel by-passes while maintaining a continuous supply of fuel under constant pressure, the battery is placed in the oversolded cavity of the pressure control valve body released by the spool, when it is relocated from the upper position to the lowest position, and communicates with the pump discharge line behind the discharge valve. Editor M. Bandura Compiled by V.Pavlyukov Tehred I.Popovich 6129/34 Circulation 504Subscribe VNIIPI USSR State Committee Inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab. 4/5 Production and printing company, Uzhgorod, st. Project, 4 fig1 Proofreader A.T. sko