RU110412U1 - INLET SYSTEM OF THE INTERNAL COMBUSTION ENGINE WITH DISTRIBUTED INJECTION OF FUEL - Google Patents

Abstract

1. The intake system of an internal combustion engine with distributed fuel injection, containing an air receiver with connecting pipes, an intake pipe with pipes according to the number of cylinders, the ends of which are connected to the ends of the connecting pipes of the receiver, characterized in that the receiver has a variable longitudinal section, and the channels of the intake pipes pipes are made of variable cross-section. ! 2. The system according to claim 1, characterized in that the shape of the cross-section of the inlet pipe branch pipes in the bend zone has an oval, the major axis of which is perpendicular to the channel bend plane.

Description

The utility model relates to the field of engine building, namely, to the intake systems of a multi-cylinder internal combustion engine (hereinafter - ICE), intended for the directional distribution of the flow of purified air among the respective engine cylinders with distributed fuel injection into the cylinders.

Known intake system of an internal combustion engine with distributed fuel injection, comprising an air receiver with connecting pipes, an intake pipe with pipes according to the number of cylinders, the ends of which are connected to the ends of the pipes of the receiver. The receiver is made in the form of a monoblock with a fuel distribution line, channels for supplying fuel to the nozzles and holes for placing their fuel receiving part, a throttle valve located inside the receiver. The outer surfaces of the monoblock and inlet nozzles for each cylinder form a C-shaped contour in the bend of which the nozzle is placed (see patent for invention RU No. 2075620 IPC 6 F02M 35/10, F02M 55/00, F02M 61/16, 1997) .

The disadvantage of this intake system of the internal combustion engine is the complexity of the design, as well as the non-optimal configuration of the cross section of the pipes, which makes it impossible to obtain high engine power.

A multi-cylinder engine with an inlet manifold is known, including inlet pipes extending directly from the inlet openings and exiting into a common gas collection receiver, the side wall of which is provided with connecting openings for said inlet pipes, and a pipe partially located in the receiver cavity. The outer section of the nozzle is connected to the highway with elements of air purification and regulation of air supply (see RF patent No. 28735 U1, IPC 7 F02B 29/02, 2003).

The disadvantage of this solution is the non-optimal length and configuration of the cross section of the intake pipes, which makes it impossible to obtain high engine power ratings.

Known intake system of an internal combustion engine with distributed fuel injection, comprising an air receiver in the form of a monoblock and an inlet pipe with inlet pipes according to the number of cylinders (according to the number of inlet channels) with flanges for attaching the pipeline to the cylinder head and receiver. The receiver is made with an external tide, which contains the aforementioned fuel distribution line, fuel channels and openings for accommodating the fuel receiving part of the nozzles. The receiver is attached to the inlet pipe by means of an extended flange, made in one with the receiver body. The throttle is located in a separate pipe attached to the front of the receiver. (Application of France N 2679962, CL F02M 61/14, 35/10, publ. 1993).

The shape of the receiver adopted in the known system, as well as the design of mounting the receiver to the inlet pipe, causes, if necessary, to ensure the set values of the lengths of the inlet pipes of the pipe and the volume of the receiver, increasing the dimensions of the inlet system, its material consumption, labor and manufacturing costs, as well as making changes to the layout of the engine compartment space. In addition, the disadvantage of this solution is the non-optimal configuration of the cross section of the intake pipes, which makes it impossible to obtain high engine power ratings.

An inlet device for an internal combustion engine is known, comprising a container, one inlet pipe and several separate inlet tubes that communicate with the engine cylinder head and individual cylinders (DE, Application 1941875, F02M 35/10, 1975).

The disadvantage of this solution is the non-optimal length and configuration of the cross section of both the receiver and the intake pipes, which does not make it possible to obtain high engine power ratings.

An inlet device for an internal combustion engine is known, comprising a receiver with an inlet pipe laterally mounted and separate air supply pipes to the cylinders of the internal combustion engine. The device is made integral in the form of interconnected bases, caps and inserts, and the individual air supply pipes to the cylinders of the internal combustion engine are formed by the walls of the opposing recesses of the base and cap, as well as the inserts and caps (see RF patent No. 77914 U1, IPC F02M 35 / 10 (2006.01), 2008).

The disadvantage of this solution is the complexity of the design, as well as the non-optimal length and configuration of the cross section of the intake pipes, which makes it impossible to obtain high engine power

Known intake system of an internal combustion engine with distributed fuel injection, comprising an air receiver with connecting nozzles, an inlet pipe with nozzles according to the number of cylinders. The ends of the inlet pipe are connected to the ends of the receiver nozzles. The inlet channels of the connecting pipes of the receiver and the inlet pipe at the receiver-pipe connection section are profiled, with a cross-section in the form of a rhombus with rounded corners at the vertices and the angle of inclination of adjacent sides of the inlet channels is within 55-65º (see RF patent No. 93463 U, IPC F02B 27/02 (2006.01), 2010). This decision was made as a prototype.

The disadvantage of this solution is the non-optimal length and configuration of the cross section of both the receiver and the intake pipes, which does not make it possible to obtain high engine power ratings.

The problem solved by the utility model is to increase engine power indicators while maintaining the layout of the motor compartment of cars.

The problem is solved due to the fact that in the known internal combustion engine intake system with distributed fuel injection containing an air receiver with connecting nozzles, an intake pipe with nozzles according to the number of cylinders, the ends of which are connected to the ends of the receiver connecting pipes, in accordance with the utility model, the receiver has a variable longitudinal section, and the channels of the inlet pipe nozzles made of variable cross section.

The cross-sectional shape of the inlet pipe nozzles in the bend zone has an oval, the major axis of which is perpendicular to the plane of the channel bend.

The technical result from the use of all the essential features of a utility model is to increase engine power indicators while maintaining the layout of the motor compartment of cars.

The implementation of the receiver having a variable longitudinal section allows you to save the layout of the engine compartment of cars and at the same time it is possible to obtain an intake pipe of optimal length and increase engine power indicators due to the optimal dynamics of the air flow passing through the receiver.

The implementation of the channels of the inlet pipe nozzles of variable cross-section provides an increase in engine power indicators by reducing the hydraulic resistance of the channels. The cross-sectional shape of the inlet pipe nozzles in the bending zone has an oval, the large axis of which is perpendicular to the bending plane of the channel, reduces the hydraulic resistance of the channels, which allows to increase engine power up to 12%.

Figure 1 - General view of the design of the intake system;

Figure 2 is a longitudinal section of the inlet pipe;

Figure 3 is a cross-section of the pipe of figure 2.

Figure 4 - comparative external speed characteristics (VSH), where curve a - indicators of the engine BA3-2112 standard equipment, curve 6 - indicators of the engine BA3-2112, equipped with the inventive system,

The engine intake system contains an air receiver 1 with connecting pipes 2 and an intake pipe 3 with pipes according to the number of cylinders. The flange 4 of the inlet pipe 3 is connected by screws 5 to the ends of the connecting pipes 2 of the receiver, equipped with a connecting flange 6 for fastening to the inlet pipe, and a sealing gasket 7 is installed at the connection point. The air receiver 1 is made with a variable longitudinal section (see Fig. 1) and equipped with a throttle flange 8. The receiver 1 of variable cross section is located above the coils of the spark plugs (see figure 1). When replacing the engine spark plugs, the receiver is separated from the inlet pipe, providing access to the spark plugs.

The channels of the inlet pipe nozzles are made of variable cross section. The round shape of the sections of the channels of the inlet pipe nozzles (see FIGS. 1, 3), starting on the inlet pipe flange 4, smoothly passes into the oval shape of the sections of the channels 9 in the bending zone. Moreover, the channels 9 in the bending zone have the shape of an oval, the major axis 10 of which is perpendicular to the plane of bending of the channels 9 (see Fig. 2. 3).

The intake system of the internal combustion engine works as follows: the intake pipe 3 with nozzles by the number of cylinders is mounted on the corresponding cylinder head connector using studs and nuts. An air receiver 1 with connecting nozzles 2 is attached to the inlet pipe flange 4. Opening the inlet (inlet) valve (s) in one of the internal combustion engine cylinders causes a pressure drop before and after the valve (in the engine cylinder with respect to the environment), followed by filling the gas mixture of the cylinder through the intake system (receiver 1, intake pipe 3).

Air pulsations and elastic waves of the air filling the intake system with the speed of sound propagate in the direction from the intake valve to the air supply throttle, as well as in the direction of all the exhaust zones of the intake pipes, i.e. a sound gas-dynamic field of repeatedly reflected elastic waves is formed in the complex geometric volume of the intake system. The implementation of the channels 9 of the exhaust pipe with a variable cross-section from round to oval and again to round allows you to reduce the hydraulic resistance of the channels, which increases the power indicators of the engines.

The advantage of the utility model is that, in comparison with the well-known intake systems of internal combustion engines with distributed fuel injection, the proposed design of the intake system allows, while maintaining the layout of the engine compartment of cars, to increase the engine power indicator up to 12%. The tests showed that the use of the inventive system leads to an increase in engine power and stabilization of its operation at high engine speeds.

The exhaust system can be manufactured on existing equipment using well-known technologies in both mass and small-scale production.

Claims (2)

1. The intake system of an internal combustion engine with distributed fuel injection, comprising an air receiver with connecting nozzles, an inlet pipe with nozzles according to the number of cylinders, the ends of which are connected to the ends of the connecting nozzles of the receiver, characterized in that the receiver has a variable longitudinal section and the channels of the inlet nozzles the pipes are made of variable cross section. 2. The system according to claim 1, characterized in that the cross-sectional shape of the inlet pipe nozzles in the bend zone has an oval, the major axis of which is perpendicular to the plane of the channel bend.