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KR-20260066788-A - Vehicle exhaust system for exhaust gas recirculation

KR20260066788AKR 20260066788 AKR20260066788 AKR 20260066788AKR-20260066788-A

Abstract

The combustion gas exhaust system (13) of the thermal engine (5) of the vehicle (15) comprises an exhaust hose (17) configured to be fluidly connected to the thermal engine (5), a catalytic converter (9) fluidly connected to the exhaust hose (17), and a first pipeline (19) located at the outlet of the catalytic converter (9) and configured to guide a portion of the gas flow purified by the catalytic converter (9) to the outside of the vehicle (15), wherein the exhaust system further comprises a second pipeline (21) located at the outlet of the catalytic converter (9) and configured to reinject a second portion of the gas flow purified by the catalytic converter (9) into the thermal engine (5).

Inventors

  • 팽사흐 로망

Assignees

  • 홀스 파워트레인 솔루션스 에스.엘.유.

Dates

Publication Date
20260512
Application Date
20240912
Priority Date
20230915

Claims (10)

  1. As a combustion gas exhaust system (13) of the thermal engine (5) of a vehicle (15), A combustion gas exhaust system characterized by comprising: an exhaust hose (17) configured to be fluidly connected to the above-mentioned thermal engine (5); a catalytic converter (9) fluidly connected to the above-mentioned exhaust hose (17); and a first pipeline (19) located at the outlet of the above-mentioned catalytic converter (9) and configured to guide a portion of the gas flow purified by the above-mentioned catalytic converter (9) to the outside of the above-mentioned vehicle (15), and a second pipeline (21) located at the outlet of the above-mentioned catalytic converter (9) and configured to reinject a second portion of the gas flow purified by the above-mentioned catalytic converter (9) into the above-mentioned thermal engine (5).
  2. A combustion gas exhaust system according to claim 1, wherein the exhaust hose (17) includes a first single-flow hose (25) and the second pipeline (19) includes a second single-flow hose (27).
  3. A combustion gas exhaust system according to paragraph 2, wherein the first single flow hose (25) comprises a staple sleeve (29) for containing a gas flow, a sealed corrugated sleeve (31) positioned around the staple sleeve (29), a metal band (33) positioned around the corrugated sleeve (31), and a flange (35) at each end configured to hold the staple sleeve (29), the corrugated sleeve (31), and the metal band (33) together.
  4. A combustion gas exhaust system according to claim 3, wherein the first and second single-flow hoses (25; 27) are positioned adjacent to each other, and the second single-flow hose (27) comprises a staple sleeve (29) for containing gas flow, a sealed corrugated sleeve (31) positioned around the staple sleeve (29), a metal band (33) positioned around the corrugated sleeve (31), and a flange (35) at each end configured to hold the staple sleeve (29), the corrugated sleeve (31), and the metal band (33) together.
  5. In paragraph 2 or 3, the second single-flow hose (27) is a double-flow hose positioned within the first single-flow hose (25) and intended to allow the exhaust hose (17) to circulate gas flow from the heat engine (5) in one direction and purified gas flow to the heat engine (5) in the other direction, and the second single-flow hose (27) comprises a sealed corrugated sleeve (31) and is positioned in a duct (39) formed by the stapled sleeve (29) of the first single-flow hose (25), a combustion gas exhaust system.
  6. A combustion gas exhaust system according to claim 5, comprising a first rigid pipe (41) connecting the heat engine (5) to the first single-flow hose (25) and a second rigid pipe (43) connecting the first single-flow hose (25) to the catalytic converter (9), wherein the second pipeline (19) is located at the end of the second single-flow hose (27) and includes two elbows (45) that pass through the first rigid pipe (41) and the second rigid pipe (43), respectively, to position the second single-flow hose (27) inside the first single-flow hose (25).
  7. A combustion gas exhaust system according to any one of claims 2 to 6, wherein the second single flow hose (27) has a longitudinal length equal to or less than 5% of the longitudinal length of the first single flow hose (25), and the second single flow hose (27) has a diameter 1.5 to 5 times smaller than the diameter of the first single flow hose (25).
  8. A combustion gas exhaust system according to any one of claims 3 to 7, wherein each tapered sleeve (29) and corrugated sleeve (31) comprises a metal comprising mostly stainless steel, and the flange (35) is made of metal and welded to the metal cladding (33).
  9. A combustion gas exhaust system according to any one of claims 1 to 8, wherein the first pipeline (19) comprises an expansion chamber (11) configured to reduce noise of the exhaust system (13).
  10. As a car (15), A vehicle (15) comprising a thermal engine (5) and an exhaust system (13) according to any one of claims 1 to 9.

Description

Vehicle exhaust system for exhaust gas recirculation The present invention relates to an exhaust system for an automobile equipped with a thermal engine. In particular, the present invention relates to adding a pipeline to an exhaust system intended to facilitate faster and less polluting starting of said engine by reintroducing purified high-temperature gas into the vehicle engine. The present invention also relates to integrating such new pipelines into an exhaust system, particularly using single or double flow hoses. Generally, the present invention is applied to any exhaust system of a vehicle. Conventional technology FIG. 1 schematically shows an exhaust system (1) of a vehicle (3) equipped with a thermal engine according to the prior art. A vehicle (3) equipped with a thermal engine includes a thermal engine (5) and a combustion gas exhaust system (1) of the thermal engine (5). The exhaust system (1) includes an exhaust hose (7) configured to be fluidly connected to a thermal engine (5), a catalytic converter (9) fluidly connected to the exhaust hose (7), and an expansion chamber (11) fluidly connected to the catalytic converter (9) and configured to guide the gas flow purified by the catalytic converter (9) to the outside of a vehicle (3) equipped with a thermal engine. The exhaust hose (7) is a flexible pipeline that guides exhaust gas from the thermal engine (5) attached to the vehicle (3) equipped with the thermal engine on one side to the catalytic converter (9) and expansion converter (11) attached to the vehicle (3) equipped with the thermal engine on the other side. Thus, when the thermal engine (5) in operating mode vibrates, the exhaust hose (7) prevents any transmission of vibration from the thermal engine (5) to the catalytic converter (9), thereby making it possible to prevent mechanical fatigue and degradation of the exhaust system (1). The exhaust hose (7) must also be able to be located in a narrow space of the vehicle (3) equipped with the thermal engine, and thus must be compact. In addition, one of the defects of the heat engine (5) is the high consumption of the heat engine during startup while the complete heating of the heat engine (5) is pending. Therefore, the objective of the present invention is to overcome the aforementioned disadvantages and provide a vehicle with low consumption and pollution by providing an exhaust system that allows for rapid heating of the engine upon startup, particularly while ensuring minimum space requirements. The present invention relates to an exhaust system for combustion gases of a vehicle thermal engine, wherein the exhaust system comprises an exhaust hose configured to be fluidly flowably connected to the thermal engine, a catalytic converter fluidly flowably connected to the exhaust hose, and a first pipeline located at the outlet of the catalytic converter and configured to guide a portion of the gas flow purified by the catalytic converter to the outside of the vehicle, and the exhaust system comprises a second pipeline located at the outlet of the catalytic converter and configured to reinject a second portion of the gas flow purified by the catalytic converter into the thermal engine. Accordingly, the second line reinjects high-temperature gas into the engine to heat the engine more quickly, enabling it to reach the nominal operating mode more quickly, and thus making it possible to reduce consumption and pollution. Advantageously, the exhaust hose includes a first single flow hose, and the second pipeline includes a second single flow hose. In one embodiment, the first single-flow hose comprises a stapled sleeve for containing a gas flow, a sealed corrugated sleeve positioned around the stapled sleeve, a metal band positioned around the corrugated sleeve, and flanges at each end configured to hold the stapled sleeve, the corrugated sleeve, and the metal band together. In a specific embodiment, the first and second single-flow hoses are positioned adjacent to each other, and the second single-flow hose comprises a stapled sleeve for containing a gas flow, a sealed corrugated sleeve positioned around the stapled sleeve, a metal band positioned around the corrugated sleeve, and flanges at each end configured to hold the stapled sleeve, the corrugated sleeve, and the metal band together. In another embodiment, the second single-flow hose is a double-flow hose located inside the first single-flow hose and intended to allow the exhaust hose to circulate gas flow from the thermal engine in one direction and purified gas flow to the thermal engine in the other direction, and the second single-flow hose includes a sealed corrugated sleeve and is located in a duct formed by the stapled sleeve of the first single-flow hose. Advantageously, the exhaust system includes a first rigid pipe connecting the thermal engine to a first single-flow hose and a second rigid pipe connecting the first single-flow hose to a catalytic converter, and the second pi