RU151680U1 - EXHAUST MANIFOLD OF THE INTERNAL COMBUSTION ENGINE - Google Patents

Abstract

1. The exhaust manifold of an internal combustion engine, consisting of exhaust pipes, mounting flanges of the exhaust pipes, characterized in that it contains stiffeners that are made between the pipes of the second and third cylinders, on the pipes of the first and fourth cylinders, and on the pipes of the first and fourth cylinders of the rib made in such a way that one stiffener is parallel to the axial line of the nozzles from the inlet flange and one stiffener located on the upper side of the nozzle it is in the form of platforms that, when approaching the flanges of the nozzles to the cylinder head, smoothly transition into two ribs from the front and rear sides of the nozzle, and from the opposite side the ribs are connected to the ribs that fall along the planes tangent to the nozzles of the second and third cylinders, respectively from the nozzle of the second cylinder to the nozzle of the first cylinder and from the nozzle of the third cylinder to the nozzle of the fourth cylinder. 2. The exhaust manifold of an internal combustion engine according to claim 1, characterized in that the stiffeners made on the nozzles of the first and fourth cylinders in the form of pads have a width equal to the width of the pipe and a thickness equal to the thickness of the pipe wall.

Description

The utility model relates to the field of engine building and can be used in the development of exhaust manifolds of internal combustion engines.

A known design of the exhaust manifold for engines with mounting the exhaust manifold and intake pipe to the same plane of the cylinder head, having separately formed pipe parts for each engine cylinder. At the same time, two outlet flanges, with associated exhaust pipes, and an outlet flange form an interconnected part of the collector between them. [Patent DE 19818390 A1 publication date 04/24/98, Int. C1. ⁶ F01N 7/10]

The disadvantage of this design is that the use of a collector with two separate parts leads to an increase in the vibration of the system, to intense noise emission. When this design works at high temperatures, due to thermal linear expansion, it becomes possible to move the flanges along the plane of attachment to the cylinder head and, as a result, efforts arise on the fastening elements of the exhaust manifold. In addition, the use of an exhaust manifold design of two separate parts complicates the installation of parts during the assembly and repair of an internal combustion engine.

The closest design for the same purpose to the claimed utility model in terms of features is the design of the exhaust manifold for internal combustion engines, with the exhaust manifold and intake pipe mounted to the same plane of the cylinder head, which has separate nozzles for each cylinder. The pipes, in pairs, of the first and fourth and, respectively, of the second and third cylinders in the lower part are connected to the flanges of the collector and through their outlet openings communicate with the pipes of the exhaust system of the car. Two separate parts of the exhaust manifold are attached to the head and exhaust pipes separately. [Car GAZ-3110 "Volga". The device, features of operation and repair manual for engines ZMZ 4062.10, 402.10, 4021.10. m.: Atlases of cars, 2000, p. 21]

The disadvantage of this design of the exhaust manifold is that when the known device is in the high temperature zone, due to thermal linear expansions, it becomes possible to change the geometry of the gas pipe. Due to these changes, displacements of the flanges of the nozzles relative to the plane of attachment to the cylinder head occur. The resulting displacements lead to increased warpage of the exhaust manifold and, as a consequence, a violation of the tightness of the exhaust channel, deterioration of the conditions for dismantling the collector parts during repair and a high probability of cracking. In addition, the lower manifold flange, which consists of two separate flanges with separate openings, makes it difficult to attach an exhaust gas neutralizer to it, which is necessary to fulfill the standards (Euro 4, Euro 5) regarding the toxicity of exhaust gases from an engine in a vehicle.

The essence of the utility model is to prevent changes in the geometry of the pipes of the exhaust manifold due to thermal stress due to the introduction of stiffeners in the form of specially arranged ribs in the collector design.

The technical result is increased reliability and durability of the exhaust manifold in the vehicle, improved installation conditions during the assembly and repair of the internal combustion engine.

The specified technical result in the implementation of the utility model is achieved by the fact that the exhaust manifold of the internal combustion engine, consisting of exhaust nozzles, flanges for attaching them to the cylinder head, the flanges of the second and third nozzles combined into one and the flange of a single exhaust pipe, contains stiffening rib. Namely, on the nozzles of the first and fourth cylinders, one stiffening rib is made on the upper side in the form of platforms with a width equal to the width of the nozzle and a thickness equal to the thickness of the nozzle wall, which, when approaching the flanges of the nozzles to the cylinder head, smoothly pass into two ribs from the front and rear sides branch pipe. On the opposite side, the ribs are connected with ribs with a thickness of 1.2-1.6 of the wall thickness of the pipe, which are tangentially lowered from the pipe of the second cylinder to the pipe of the first cylinder and from the pipe of the third cylinder to the pipe of the fourth cylinder. In addition, a stiffener is located between the nozzles of the second and third cylinders, and a stiffener is located at the angle K = 25-30 degrees on the first and fourth nozzles from the rear side parallel to the axial line of the nozzle from the inlet flange.

The essence of the utility model is illustrated by drawings:

FIG. 1 - general view of the exhaust manifold;

FIG. 2 - section aa;

FIG. 3 - section GG;

FIG. 4 is a general view of the exhaust manifold from the side of the mounting flange to the head;

FIG. 5 - view D;

FIG. 6 - view E;

FIG. 7 - section BB;

FIG. 8 - section bb.

The exhaust manifold for the internal combustion engine contains nozzles of the first cylinder 1, second cylinder 2, third cylinder 3, fourth cylinder 4 with flanges 5, 6, 7. All nozzles converge into a common flange 8 of the neutralizer. On the pipes 1 and 4 on the upper side there is a stiffener 9 in the form of a platform with a width equal to the width of the pipe and a thickness equal to the thickness of the pipe wall. When the ribs 9 approach the flanges 5 and 7, respectively, they each smoothly pass into the stiffener 10 from the front and into the stiffener 11 from the rear side of the nozzles 1 and 4. On the opposite side, the ribs 9 are connected to the ribs 13 with a thickness of 1.2-1, 6 the wall thicknesses of the pipe, which are lowered along the tangent plane to the pipe 2, to the pipe 1 and similarly along the tangent plane to the pipe 3 are lowered to the pipe 4. In addition, a stiffener 14 is located between the pipes 2 and 3, which connects these pipes. On the nozzles 1 and 4 from the back side parallel to the axial line of the nozzle from the input flanges 5 and 7 are stiffening ribs 12 at an angle K = 25-30 degrees.

The work of the exhaust manifold is as follows:

The exhaust gases from the cylinders pass through the exhaust channels 1, 2, 3, 4, the internal openings of which are connected in the hole 15 of the flange 8 of the fastener. With the passage of exhaust gases through pipes 1, 2, 3, 4, the walls of the exhaust manifold heat up and thermal expansions tend to change the geometry of the channels 1, 2, 3, 4, the changes of which entail the displacement of the flanges 5, 6, 7, and 8, but the ribs 9 smoothly transition in the ribs 10 and 11 together with the ribs 12 do not allow changing the geometry of the nozzles 1 and 4, thereby eliminating the movement of the flanges 5 and 7 of the attachment to the cylinder head. Also, the stiffening ribs 13 together with the jumper 14, forming an arched structure, prevent the geometry from changing when the pipes 2 and 3 are heated, thereby eliminating the movement of the fastening flange 6 to the cylinder head and the exhaust flange 8 mounting.

The advantage of the claimed utility model is that, compared with the known designs of exhaust manifolds for engines in which the inlet pipe and exhaust manifold are attached to the same plane of the cylinder head, the reliability and durability of the exhaust manifold are improved, the conditions for assembling and removing the manifold are improved on the engine. This is achieved by the implementation of stiffening ribs on the exhaust pipes, while they have a certain cross-section, location and configuration and depending on the wall thickness of the pipe.

Claims (2)

1. The exhaust manifold of an internal combustion engine, consisting of exhaust pipes, mounting flanges of the exhaust pipes, characterized in that it contains stiffeners that are made between the pipes of the second and third cylinders, on the pipes of the first and fourth cylinders, and on the pipes of the first and fourth cylinders of the rib made in such a way that one stiffener is parallel to the axial line of the nozzles from the inlet flange and one stiffener located on the upper side of the nozzle it is in the form of platforms that, when approaching the flanges of the nozzles to the cylinder head, smoothly transition into two ribs from the front and rear sides of the nozzle, and from the opposite side the ribs are connected to the ribs that fall along the planes tangent to the nozzles of the second and third cylinders, respectively from the nozzle of the second cylinder to the nozzle of the first cylinder and from the nozzle of the third cylinder to the nozzle of the fourth cylinder. 2. The exhaust manifold of an internal combustion engine according to claim 1, characterized in that the stiffeners made on the nozzles of the first and fourth cylinders in the form of pads have a width equal to the width of the pipe and a thickness equal to the thickness of the pipe wall.

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