RU30858U1 - EXHAUST MANIFOLD FOR INTERNAL COMBUSTION ENGINE - Google Patents

Description

2W2135131

- iBiMiiiMiiittir

MPK7 F01N7 / 10

EXHAUST MANIFOLD FOR THE INTERNAL ENGINE

The utility model relates to mechanical engineering, in particular engine manufacturing and is related to the design of the elements of the exhaust system of an internal combustion engine (hereinafter ICE).

Known exhaust manifold of the internal combustion engine of a VAZ-2108, V.A. Vershigora et al. Car VAZ-2108, M., ZhOSAAF USSR, 1986, p. 27, which is a cast massive piece of cast iron. The exhaust manifold has attachment flanges, on the one hand to the cylinder head of the engine, and on the other hand to the exhaust pipe of the exhaust pipe. During the operation of the internal combustion engine, the manifold is exposed to significant temperature effects from the exhaust valves.

Similar designs of exhaust manifolds are described in US patent No. 5347810, IPC5 F01N 7/10, 1994, No. 5069036, IPC5 F01N 7/10, 1991, application EPO (EP) 0049459, F02F 11/00, 1982.

A common disadvantage of the devices described above is their significant metal consumption and heat capacity, i.e. during the operation of ICEs, their massive cast-iron structure takes a significant amount of heat, which is necessary when a catalytic converter is provided in the exhaust system route, which is caused by modern high requirements to the maximum. acceptable

the content in the exhaust gases of the internal combustion engine of harmful components (products of incomplete combustion of the working mixture).

Known technical solutions to reduce the heat capacity of the described designs of the collectors, see, for example, Japanese application No. 63215809, MKI4 F01N 7/10, 1988. Here in the inner main part of the collector, with the formation of a gap relative to the inner walls

COMBUSTION

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collector, a thin-walled pipe is installed. But this technique greatly complicates the design of the collector.

In modern ICE designs, in the exhaust route of which catalytic converters are provided, exhaust manifolds of lightweight construction, stamped from a thin heat-resistant metal sheet, with welded connecting flanges, PCT (WO) 90/06207, MKI5 V23K 31/02, 1990 are widely used; US No. 4656830, MKI4 F01N 3/18, 1987; France No. 2644207, MKI5 F01N 7/10, 1990; Germany No. 4200611, MKI5 F01N 7/10, 1993; EPO (EP) 0623739, MKI5 F01N 7/10, 1994.

The use of such exhaust manifolds, in combination with various types of catalytic converters, makes it possible to meet the stringent international toxicity requirements of Euro-3 and Euro4. The technical difficulties that arise in the manufacture of the described collectors are, first of all, that it is necessary to observe the geometric parameters that are optimal from the point of view of hydraulic resistances - bending radii of individual pipes, lengths of individual pipes, their specific location in the cramped space of the engine compartment and a number of other parameters . Therefore, as a rule, each of the individual pipes of the collector is made by welding the individual components of the pipe elements. Moreover, the connectors can be either longitudinal, Japanese application No. 3-63644, MKI5 F01N 7/10, 1991, (stamped from two halves), or transverse, Germany No. 3720714, MKI4 F01N 7/14, 1989 (when each of the pipes welded from individual preformed pipe fittings). Or in the completed design of the collector, both of the above methods are applied simultaneously, France No. 2727466, IPC6 F01N 7/10, 1996.

As a prototype, an exhaust manifold for internal combustion engines of passenger cars was selected, utility model of Russia No. 14974, MPK7 F01N 7/10, publ. in BIPM No. 25, dated 10.09.2000, which contains at least two flow pipes, for example, consisting of nozzles fastened together by welding, the upper ends of which are connected to the intake openings of the internal combustion engine through the openings of at least one flange, and the lower ends of the pipes at least two are connected to the collector elements, the lower ends of which are fixed on the lower outlet flange and through its holes

communicated with the exhaust pipelines of the gas purification system, and the mentioned pipes of both flow pipes are made of heat-resistant sheet material. The collector elements are made in the form of funnels, while the upper ends of both flow pipes are fixed to a solid inlet flange. The lower outlet flange is made of sheet material, mainly of heat-resistant steel, with flanging along its edges and holes and welded lugs at the locations of the mounting holes.

The disadvantages of the considered exhaust manifold, as shown by the practice of its operation on individual models of VAZ automobiles, include the fact that the manufacture of individual collector pipes from individual nozzles, followed by their welding, leads to non-optimal geometric parameters of the collector as a whole, which increases the hydraulic resistance in the exhaust path ICE, reduces its power and torque.

To eliminate this undesirable phenomenon, in the well-known exhaust manifold it is proposed not only to compose its design from single separate pipes, but also to optimize their geometric parameters in the bending zone of each individual pipe, in order to achieve minimal water losses in the exhaust system tract.

The essence of the utility model is that in a known exhaust manifold containing at least two flow pipes, one of which is formed by converging at the outlet pipes of the first and fourth ICE cylinders, and the other is formed by converging at the output pipes of the second and third cylinders, the upper ends of which connected to the inlet of the internal combustion engine through the holes of at least one flange, and the lower ends of the pipes are fixed to the lower outlet flange and through its openings are in communication with the exhaust piping of the systems gas purification, moreover, the pipes are made of heat-resistant sheet material, each of the individual nozzles is made of an integral segment of a thin-walled heat-resistant pipe, while the bending radii of all nozzles are the same and each of the bending radii lies in one plane, and the bending radius is 1.4 .. 1.6 outer diameter of the pipe at the bend.

The essence of the utility model is illustrated in FIG. 1 and 2.

The exhaust manifold contains at least two flow pipes 1 and 2, one of which is formed by converging outlet pipes 3 and 4, respectively, of the first and fourth internal combustion engine cylinders, and the other is formed by converging outlet pipes 5 and 6, respectively, of the second and third cylinders, upper the ends of which are connected to the inlet of the internal combustion engine through the openings of at least one flange 7, and the lower ends of the pipes are fixed to the lower outlet flange 8 and through its openings are in communication with the exhaust pipes of the gas treatment system, richom pipes 1 and 2 made of heat resistant sheet material. Each of the individual nozzles 3 ... 6 is made of an integral segment of a thin-walled heat-resistant pipe, while the bending radii of all nozzles 3 ... 6 are the same and each of the bending radii lies in the same plane, and the bending radius is 1.4 ... 1.6 outer diameter of the pipe at the bend.

With this design, minimal water losses are achieved in the ICE exhaust path, which leads to an increase in power and an increase in the torque of the ICE.

The proposed technical solution is industrially applicable, since it can be used industrially in the automotive industry and other areas of the national economy, workable, feasible and reproducible.

The device works in the usual way.

At the exhaust gas exhaust cycle from the engine cylinders, when the exhaust valve is open, hot exhaust gases are displaced into the exhaust manifold, then they enter the catalytic converter, leak through its active substance and are sufficiently cleaned of harmful substances into the muffler (silencers if in the exhaust path there are several of them), while losing some of the sound energy, and then they are released into the atmosphere.

Using the claimed technical solution allows you to create an inexpensive and compact design of an efficient exhaust manifold, increase the competitiveness of domestic cars due to the compliance of their environmental safety with world standards, reduce

air pollution in populated automobile exhaust gases is based on the internal combustion engine. points toxic components of the means, the power unit of which

Claims (1)

An exhaust manifold for an internal combustion engine containing at least two flow pipes, one of which is formed by the branch pipes of the first and fourth cylinders ICE converging at the outlet, and the other is formed by the branch pipes of the second and third cylinders converging at the outlet, the upper ends of which are connected to the ICE inlets through the holes of at least one flange, and the lower ends of the pipes are fixed to the lower outlet flange and through its openings are in communication with the exhaust pipes of the gas purification system, and the losses are made of heat-resistant sheet material, characterized in that each of the individual nozzles is made of an integral segment of a thin-walled heat-resistant pipe, while the bending radii of all nozzles are the same and each of the bending radii lies in one plane, and the bending radius is 1.4-1 , 6 of the outer diameter of the pipe at the bend.