RU76985U1 - CENTRAL FUEL INJECTION SYSTEM - Google Patents

Abstract

The utility model relates to automotive engine manufacturing, in particular, to power systems for internal combustion engines with central fuel injection.

A disadvantage of the known devices is the low quality of the preparation of the air-fuel mixture, which is the main reason for incomplete combustion and increased emission of toxic products of incomplete combustion of fuel.

The central fuel injection system in the internal combustion engine includes a fuel injection unit 2 located on the inlet pipe 1, a throttle valve 3 and an air cleaner 4, and is characterized in that it is equipped with a mixing device in the form of a spacer 5 installed under the throttle valve 3, having a through, interfaced with the input in the inlet pipe 1, hole 6, and the supply line 7.

In the spacer 5, an annular cavity 8 is made and the chordal channels 9 are connected with it and are arranged uniformly around the circumference of the through hole 6, while the annular cavity 8 is connected to the air purifier 4 through the throttle opening 10 through the throttle opening 10.

When the engine is running under the throttle valve 2, a vacuum is created, as a result of which air from the air cleaner 4 through the inlet pipe 7 enters the annular cavity 8 and through the chordal channels 9 into the throttle space. The air-fuel mixture due to the gas-dynamic effect of chordal jets, which uniformly clutter the cross section of the inlet pipe, becomes uniform in composition, and the quality of its mixing remains high in variable engine operating conditions, ensuring complete combustion of the fuel and low toxicity of exhaust gases.

The use of this technical solution provides an increase in the completeness of fuel combustion, a decrease in fuel consumption and a decrease in the toxicity of exhaust gases due to the all-regime intensification of the process of mixture formation.

Description

The utility model relates to automotive engine manufacturing, in particular, to power systems for internal combustion engines with central fuel injection.

It is known that the efficiency of mixture formation determines the environmental and economic characteristics of an internal combustion engine.

Systems with central fuel injection are widely used in internal combustion engines, however, all of them have a common drawback - low quality of mixture formation and, as a result, increased emissions of products of incomplete combustion of fuel.

Known fuel injection systems "Mono-Jetronic", "Mono-Motronic", produced by the company "BOSCH", in which there is a fuel injection unit, an air cleaner, a throttle and a control unit.

The known system of central fuel injection, patent RU No. 2180706, IPC F02M 23/06, 51/00, publ. 04/27/2000, bull. No. 12.

The device consists of the upper and lower parts of the housing, in the upper part of the housing there is a socket in which an electromagnetic nozzle is installed. The socket is equipped with a carrier jumper in which the inlet and outlet fuel channels, the additional air regulator and the bypass idle air channel are located.

The input section of the channel is located directly below the lower plane of the carrier bridge of the socket of the electromagnetic nozzle.

A disadvantage of the known devices is the low quality of the preparation of the air-fuel mixture, which is the main reason for incomplete combustion and increased emission of toxic products of incomplete combustion of fuel.

The technical task of the proposed utility model is to improve the quality of mixture formation due to the gas-dynamic effect of jets of a gaseous medium (air is used as a gaseous medium) on a fuel-air mixture. As a gaseous medium, exhaust gases can be used, similar to the well-known exhaust gas recirculation system for a carburetor internal combustion engine according to patent RU No. 2170361, IPC F02M 25/07, 51, publ. 07/10/2001, Bull. No. 19.

This object is achieved in that the central fuel injection system comprising a central fuel injection unit, a throttle valve and an air cleaner differs from the known ones in that it is equipped with a mixing device in the form of a spacer installed under the throttle valve, having a through hole connected to the inlet to the inlet pipe , in the spacer, coaxially through the hole, an annular cavity is made, which is in communication with

evenly spaced chordal holes with throttling space and through the supply line through the throttling inlet opening is connected to the air cleaner.

The following graphic materials explain the essence of the proposed utility model.

In Fig 1 presents a General view of the proposed utility model;

in Fig.2 - fuel injection unit with an installed spacer and a supply line., Fig.3 shows a cross section aa of the spacer.

Implementation of a utility model.

The central fuel injection system in the internal combustion engine includes a fuel injection unit 2 located on the intake pipe 1, a throttle valve 3 and an air cleaner 4, Fig. 1, and is characterized in that it is equipped with a mixing device in the form of a spacer 5 installed under the throttle valve 3, Fig. 2 Spacer 5 has a through hole, coupled with the entrance to the inlet pipe 1, hole 6, figure 3 and is connected by a supply line 7 (figure 2) to the air purifier 4 (figure 1).

In the spacer 5, an annular cavity 8 is made and the chordal channels 9 are connected with it and arranged uniformly around the circumference of the through hole 6, while the annular cavity 8 is connected to the air purifier 4 through the throttle opening 10 through the throttle opening 10 (Fig. 3).

The throttle hole provides the dosing of the air entering the annular cavity without causing a significant change in the fuel-air ratio.

The operation of the central injection system is as follows.

When the engine is running under the throttle valve 2, a vacuum is created, as a result of which air from the air cleaner 4 through the inlet pipe 7 enters the annular cavity 8 and through the chordal channels 9 into the throttle space (Fig. 1, Fig. 2) Air-fuel mixture due to gas dynamic effects chordal jets, which uniformly clutter up the cross section of the inlet pipe, become uniform in composition, and the quality of its mixing becomes high, including in variable modes of operation of two igatora, providing complete combustion of fuel and low toxicity of exhaust gases.

The proposed utility model should find wide application in the power supply systems of engines with central fuel injection. The use of this technical solution provides an increase in the completeness of fuel combustion, a decrease in fuel consumption and a reduction in the toxicity of exhaust gases due to the all-regime intensification of the process of mixture formation.

Claims (1)

A central fuel injection system in an internal combustion engine, comprising a fuel injection unit, a throttle valve and an air cleaner located on the inlet pipe, characterized in that, in order to improve the process of mixture formation and increase the completeness of combustion, it is equipped with a mixing device in the form of a spacer installed under the throttle valve having a through mating with an entrance to the inlet pipe, an opening, and a supply line, an annular cavity is made in the spacer and the equal omerno of the through hole chordal channels circumference, wherein the annular cavity through the supply line through the orifice connected to the air cleaner.