SU1731967A1 - Inlet system of internal combustion engine - Google Patents

Abstract

The invention makes it possible to increase the efficiency of the engine by expanding the range of adjustment of the resonant modes of operation of the intake system. The intake system comprises a cylindrical body 1 with an outlet nozzle 2 provided with a flange 3 for fastening the system to the cylinder head. A cylindrical receiver 4 is coaxially mounted inside the housing 1 so as to form an annular channel 5 for the passage of the air flow. Between case 1 and receiver 4, a fixed partition 6 is installed, separating channel 5 with pipe 2. From the ends of case 1, channel 5 has walls formed by end flanges of the case. Windows 7-11 are made in the wall of the cylindrical receiver, each of which has

Description

The invention relates to engine propulsion and can be used to increase the filling of internal combustion engines (ICE).

Intake systems of an internal combustion engine with variable intake path length for regulating the resonant supercharging are known, containing moving elements for changing the geometrical parameters and, consequently, the resonant properties of the intake system depending on the engine operation mode.

The movement of moving parts is usually carried out by special mechanical or electronic-mechanical devices based on signals from an electronic control unit, which receives information about operating parameters of the engine.

The main problems in creating intake systems with variable path length are: achieving simplicity of design and a wide range of adjusting the length of the path, reducing the size of the systems while extending the range of adjusting the resonant length.

A known intake system for regulating the resonant pressurization of an internal combustion engine, comprising a housing with an outlet nozzle communicated with an engine cylinder, and also located inside the housing with a gap forming an air channel, a receiver having at least two windows formed in its side walls in each of which are fixed on individual axles plate valves, equipped with a drive mechanism and alternately opened by commands of the electronic control unit, depending on the mode of operation of the engine.

The disadvantages of this device include:

limited possibilities to regulate the resonant length of the path (only

two stages of regulation - either short or long channel), reducing filling on partial engine operating conditions and worsening its efficiency,

imperfect aerodynamic

the flow part of the system due to the irrational design and the location of the flat flap, causing a decrease in engine filling.

The purpose of the invention is to increase the filling of the internal combustion engine by expanding the range of adjustment of the resonant path length and reducing the aerodynamic flow loss.

The goal is achieved by the fact that

in the intake system, including the housing with the outlet pipe communicated with the engine cylinder, as well as located inside the housing with a gap forming the air channel, a receiver having at least two windows made in its side walls, each of which is fixed on individual axes x plate valves equipped with a drive mechanism and alternate opening on commands from the electronic control unit, depending on the engine's operating mode, the housing and the receiver are cylindrical and arranged coaxially, and each plate valve is fixed

end part on its axis and has a curved surface profile, the radius of curvature of which coincides with the radius of the cylindrical surface of the receiver, with an annular channel between the body and

the receiver is separated from the outlet

housing fixed partition installed in the place of their intersection.

FIG. 1 shows a structural diagram of the intake system, a cross section; in fig. 2 - diagram of the valve drive mechanism.

The intake system of the internal combustion engine comprises a cylindrical body 1 with an outlet 2 provided with a flange 3 for securing the system to the cylinder head. A cylindrical receiver 4 is coaxially mounted inside the housing 1 so that an annular channel 5 is formed for the passage of the air flow. Between case 1 and receiver 4, a fixed partition 6 is installed, separating channel 5 with pipe 2. From the ends of case 1, channel 5 has walls formed by the front flanges of the case. Windows 7–11 are made in the wall of the cylindrical receiver, each of which has its own valve 12–16 with a curvilinear profile fixed by the end part on individual axes 17 associated with its own drive mechanisms (not shown). The radius of curvature of the profile of each valve 12-16 is equal to the radius of the cylindrical surface of the receiver 4. The width of each of the valves 12-16 is equal to the width of channel 5.

A rocker 18 is fixed on each of the axes 17, one arm of which is connected to a stretch spring 19, reinforced with a second end on the flange of the housing 1, and the second to the core of the solenoid 20 activated by an electronic control unit (not shown). Valves 12-16 are switched on alternately, depending on the engine's operating mode, in the sequence determined by the program embedded in the electronic control unit. The normal position of the valves is closed.

The intake system works as follows.

When the engine is running, the air flow from the air cleaner passes through the throttle valve area of the engine and flows from the end to the cylindrical receiver 4 and further, the passage through the window 9 that is open in this mode of engine operation moves through channel 5 to the outlet 2 to the engine cylinder. In this case, the engine operates with an optimal resonant length of the intake path equal to the length of the channel from the open horse 9 to the engine cylinder. In general, the path traveled by the air flow is determined by which of the valves 12-16 is open at a given time. The electronic control unit switches on (opens) valves 12-16 in accordance with the program embedded in it, thus creating the optimum conditions for the resonant boost of the engine. With an increase in the frequency of rotation of the engine shaft, the resonant length of the intake path decreases.

The proposed intake system for regulating the resonant supercharging is characterized by simplicity of design, relatively small dimensions with wide possibilities for discrete adjustment of the resonant path length, potential reliability (there are no moving seals and significant movements of the regulating elements), a rather perfect aerodynamic flow pattern.

5 parts (the open valve is at the same time a guiding element when turning the flow, closed valves form the inner wall of the flow channel and do not create aerodynamic resistance).

In addition, it should be noted that the simplicity of the design of the adjustable intake system predetermines the simplicity of the circuit design of the electronic control unit, as well as its increased reliability due to the discrete valve control principle.

In multi-cylinder engines, the intake system may be made up of several similar sections (according to the number of cylinders). In this case, all sections are located along the common cylindrical receiver, valves of the same name are fixed on a single axis in a row and open simultaneously, about 5 times, thus individual paths of the same length for each cylinder.

Claims (1)

Invention Formula 0 The intake system of an internal combustion engine, comprising a housing with an outlet, communicated with an engine cylinder, located inside the housing with a gap forming an air channel, 5 receiver, equipped with at least two windows, made in its side walls, each of which is fixed to the individual axle plate valves, equipped with a mechanism to drive them 0 alternate opening associated with an electronic control unit of the engine operating mode, characterized in that, in order to increase the efficiency of the engine by expanding the control range, the housing and the receiver are cylindrical and arranged coaxially, and each plate valve is fixed end on its axis and is made with a curved surface profile, the radius of curvature of which sovG falls with the radius of the cylindrical surface of the receiver, and the annular channel between the housing and the receiver is separated from the inlet of the casing with a fixed partition installed at the place of their intersection. FIG. 2