RU142536U1 - TURBOCHARGED EXHAUST ENGINE RECYCLING SYSTEM - Google Patents

Abstract

Exhaust gas recirculation system of a turbocharged internal combustion engine, comprising one or more exhaust manifolds, one or more recirculation pipes corrugated at bends, a recirculation valve, a gas cooling heat exchanger and coolant pipes, characterized in that an exhaust gas mixer made in the form of a tube, at the exit of which half of the cylinder is cut off, and the remaining half is perforated in the form of one or more rows of holes.

Description

The utility model relates to the field of engine manufacturing, namely, to turbo-charged internal combustion engines.

A known exhaust gas recirculation system (hereinafter referred to as exhaust gas) of an engine designed to reduce emissions of nitrogen oxides and dispersed particles, comprising an exhaust manifold, a recirculation pipe, inside which a gas cooler, a recirculation pipe that connects the exhaust gas to the recirculation valve and an intake manifold connected air duct with a turbocharger (see patent WO 2005040592, MKI: F02D 21/08; F02D 41/00; F02M 25/07, publication date 2005.05.06).

The specified system has disadvantages associated with the low reliability of the exhaust gas recirculation system due to the location of the cooler inside the exhaust recirculation tube and the need to use additional supports for fastening the recirculation tubes.

An exhaust gas recirculation system for the engine is also known, comprising an exhaust manifold, a spatial configuration recirculation tube with corrugations at the bending points and with an intermediate support fixed to the engine oil separator cover, a recirculation valve rigidly mounted on the discharge pipe of the intake manifold connected by an air duct to the turbocharger (see utility model patent No. 43597 IPC: F02M 25/06, 25/07; F02B 27/04, 33/44, 37/00, publication date - 01/27/2005).

This recirculation system has drawbacks associated with the low efficiency of the exhaust gas recirculation system in terms of reducing emissions of particulate matter, depending on the cooling depth of the exhaust gas, flowing through the recirculation valve into the discharge pipe of the intake manifold.

Closest to the claimed one, according to the set of essential features, is a technical solution, according to which an exhaust gas cooler is used with an inlet pipe connected to a recirculation pipe and an outlet pipe rigidly fixed to the recirculation valve body, while the intermediate support is made with an elastic ring element and the recirculation tubes have elastic properties due to the Z-shape and the implementation of the corrugations in places of bending (patent for utility model No. 73401 IPC: F02M 25/06, publication date - 05/20/2008).

The disadvantages of this exhaust gas recirculation system are the relatively low quality of mixing the exhaust gases with a charge of fresh air, which does not allow to achieve the required ratio of emissions of dispersed particles and nitrogen oxides.

The proposed utility model solves the problem of increasing the reliability of the exhaust gas recirculation system due to the uniformity of gas mixing and, as a result, reducing emissions of dispersed particles at a given level of emissions of nitrogen oxides through the use of a gas mixer.

The specified technical result in the implementation of the utility model is achieved due to the fact that the exhaust gas recirculation system of a turbocharged internal combustion engine containing one or more exhaust manifolds, one or more recirculation tubes corrugated at the bending points, a recirculation valve, a gas cooling heat exchanger and cooling pipes liquid, is additionally equipped with an exhaust gas mixer, made in the form of a tube, the output of which is cut off half of the cylinder, and the remaining half has t perforations in the form of one or more rows of holes.

The combination of distinctive features, namely, that the system additionally contains a gas mixer made in the form of a tube, at the exit of which half of the cylinder is cut off, and the remaining half has perforation in the form of one or more rows of holes, which improves the reliability of the exhaust gas recirculation system due to better uniformity gas mixing and, as a result, to reduce the emission of dispersed particles at a given level of emission of nitrogen oxides.

The applicant is not aware of the exhaust gas recirculation system with the indicated combination of essential features and the claimed combination of essential features does not follow explicitly from the state of the art, which confirms the compliance of the claimed technical solution with the patentability condition “novelty”.

The utility model is illustrated by drawings, on which:

FIG. 1 - exhaust gas recirculation system of a turbocharged internal combustion engine;

FIG. 2 - gas mixer;

The exhaust gas recirculation system for a turbocharged engine contains an exhaust manifold 1 left, an exhaust manifold 2 right, a recirculation pipe 3 left, a recirculation pipe 4 right, corrugated at the bending points, a recirculation valve 5 mounted on the heat exchanger 6, a gas exhaust pipe 7, a mixer 8 having perforation 9 in the form of one or more rows of holes, a pipe 10 for supplying coolant to the heat exchanger 6 and a pipe 11 for draining the coolant from the heat exchanger 6.

The exhaust gas recirculation system of a turbocharged engine works as follows: a part of the exhaust gases is taken from the exhaust manifolds 1 and 2 and sent through the recirculation tubes 3 and 4 to the heat exchanger 6. The exhaust gas flow is regulated using the recirculation valve 5, which is fixed at the inlet of the heat exchanger 6. Exhaust gas inside the heat exchanger 6 passes through tubes washed from the outside with coolant coming from the engine cooling system through the pipe 10 and discharged through the pipe 11. Next, the cooled exhaust gas through the gas exhaust pipe 7 in ag ood sort gas mixer 8 having the perforations 9 in the form of one or more rows of openings and adapted to uniformly mix the exhaust gas with the air flow. This mixture enters the engine inlet and is fed into the engine cylinders.

The exhaust gas mixer is made in the form of a tube, at the exit of which half of the cylinder is cut off, and the remaining half has a perforation 9 in the form of two rows of holes, while the outlet section of the pipe entering the charge air stream is oriented by the outer part of the perforated half towards the stream, which ensures optimal mixing exhaust gas with charge air.

The exhaust gas recirculation system of a turbocharged internal combustion engine can be manufactured using standard equipment using modern materials and technologies.

Claims (1)

An exhaust gas recirculation system for a turbocharged internal combustion engine comprising one or more exhaust manifolds, one or more recirculation tubes corrugated at the bending points, a recirculation valve, a gas cooling heat exchanger and coolant pipes, characterized in that the exhaust gas mixer is additionally introduced in the form of a tube, at the exit of which half of the cylinder is cut off, and the remaining half has perforation in the form of one or more rows of holes.

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