RU2230923C1 - Electronic speed governor to control delivery of fuel by high-pressure fuel-injection pump - Google Patents

Abstract

FIELD: mechanical engineering; internal combustion engines.

SUBSTANCE: invention relates to electronic speed governors for high-pressure fuel-injection pumps of engines used in automotive and special application vehicles. Proposed electronic speed governor contains actuating mechanism and magnetic circuit with coil rigidly secured on fuel-injection pump housing. Armature and rack position pickup core of actuating mechanism are made integral with fuel-injection pump control rack or shaft-tie-rod arranged parallel to rack, being rigidly coupled with rack and controlling its motion. Perforation in form of slots or holes is made on cylindrical surface of armature. Invention provides decrease of weight, increase of armature current range and improved dynamic properties at reduced use of material.

EFFECT: improved reliability and increased service life of speed governor.

3 cl, 3 dwg

Description

The invention relates to engine building, in particular to the design of electronic regulators of fuel pumps of high pressure engines.

The effective performance of internal combustion engines depends on the reliability and durability of the fuel supply equipment, in particular the electronic regulators of high pressure fuel pumps, and the reliability and durability of the latter depends on the design of their actuator.

A known design of the electronic controller [1], the actuator armature of which is one of the main nodes, it moves the rail of the fuel pump in the right direction, providing the necessary fuel supply, that is, it continuously moves in a constant magnetic field.

The disadvantage of this design is the heating of the armature by eddy currents and the braking force created by them, which reduces the control current, and therefore, the dynamic properties are lost. Since a metal cup continuously moves in a constant magnetic field, eddy currents (or Foucault currents) form on its surface. The amount of heat is proportional to the surface area [2] penetrated by magnetic field lines. The magnetic field interacts with induction currents and creates a force that inhibits the movement of the rail, and this induction braking force requires additional energy to overcome it. As a result, the accuracy of regulating the fuel supply decreases and the armature heats up, which generally leads to a decrease in the reliability and durability of the actuator.

As a prototype, an electronic speed controller was selected to control the fuel supply by the high-pressure fuel pump [3], containing an actuator in which the armature, core, and rail position sensor are made integrally with the high-pressure fuel pump rail or draft roller located parallel to the rail, rigidly connected with it and controlling its movement, as well as a magnetic circuit with a coil, rigidly fixed to the fuel pump housing. The actuator armature moves the rail of the fuel pump in the right direction, providing the necessary fuel supply, continuously moving in a magnetic field.

The disadvantage of this design is the heating of the armature by eddy currents and the braking force created by them, which reduces the control current, and therefore, the accuracy of regulation of the fuel supply decreases, as well as the reliability and durability of the actuator as a whole.

The aggravation of the problems of increasing the technical and economic indicators of internal combustion engines, and therefore their competitiveness, requires saving fuel, oil, increasing motor resources, and applying more and more advanced systems for regulating engine speed.

The invention solves the problem of increasing the reliability and durability of the actuator of the electronic controller, reducing its weight makes it possible to increase the range of variation of the armature current, improves dynamic properties at lower material costs.

This problem is solved by the fact that in the electronic speed controller for controlling the fuel supply by the high-pressure fuel pump containing an actuator, in which the armature, core of the rack position sensor are made integrally with the rail of the high-pressure fuel pump or traction roller located parallel to the rail rigidly connected with it and controlling its movement, as well as a magnetic circuit with a coil, rigidly fixed to the fuel pump housing, according to the invention, the anchor is made with perforation th on a cylindrical surface.

A feature of the proposed electronic controller armature is that it (the armature) has perforations in the form of slots or holes on its cylindrical surface. As a result, heating of the armature by eddy currents and the braking force created by them, which reduces the control current, will decrease, and therefore, the dynamic properties will improve. In addition, the reliability and durability of the actuator will increase.

The essence of the invention is illustrated by drawings, where in FIG. 1 shows the electronic regulator of the high-pressure fuel pump assembly; in FIG. 2 - the anchor of the actuator of the electronic controller with perforation in the form of slots; in FIG. 3 - the anchor of the actuator of the electronic controller with perforation in the form of holes.

The electronic controller (Fig. 1) contains an actuator 1, in which the armature 2 is a metal cup, in contrast to the previous designs [1] and [3] made with slots 3 (Fig. 2) or with holes 4 (Fig. 3). The anchor 2, the core 5 of the rack 6 position sensor is made integrally with the rail 7 of the high pressure fuel pump 8 or a thrust roller located parallel to the rail, rigidly connected to it and controlling its movement. The magnetic circuit 9 with the coil 10 is rigidly fixed to the housing of the fuel pump.

The regulator operates as follows. The principle of operation of an electromagnet is based on mechanical action on a conductor with current, placed in a uniform magnetic field. The coil 10 of the magnetic circuit 9, connected to a constant voltage source, creates a constant magnetic field, in the gap of which is the armature winding 2. A control current is supplied to the armature winding 2. Depending on the magnitude and direction of the control current, the armature 2 will move left and right, increasing or decreasing the fuel supply.

The proposed design of an electronic fuel pump regulator can be used in automotive vehicles, as well as special vehicles. Its use will increase the reliability and durability of the actuator of the electronic controller, reduce its weight, will make it possible to increase the range of variation of the armature current and improve dynamic properties at lower material costs.

Sources of information

1. Patent No. 2069780 of the Russian Federation, C1 F 02 D 31/00. Electronic speed controller for controlling the fuel supply by a high-pressure fuel pump, S. P. Gladyshev, V. M. Bunov, E. V. Bunova. - Inventions. - 1996.-№33.-S.188.

2. D. Giancoli. Physics. M .: "MIR", 1989, 2 t, S.235-237.

3. Patent No. 2066386 of the Russian Federation, C1 F 02 D 1/08, 1/18. Electronic speed controller for controlling fuel supply by a high-pressure fuel pump, S.P. Gladyshev, V.M. Bunov, A.V. Losev and other inventions. - 1996. - No. 25.- P.192.

Claims (3)

1. An electronic speed controller for controlling the flow of fuel to a high pressure pump, comprising an actuator in which the armature and core of the rack position sensor are integrally formed with a rail of the high pressure fuel pump or a thrust roller parallel to the rail rigidly connected to it and controlling its movement, as well as a magnetic circuit with a coil, rigidly fixed to the fuel pump housing, characterized in that the anchor is made with perforation on a cylindrical surface. 2. The controller according to claim 1, characterized in that the perforation of the armature is made in the form of slots. 3. The controller according to claim 1, characterized in that the perforation of the armature is made in the form of holes.

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