Two-stage supercharging air inlet cooling system and engine

Abstract

The utility model discloses a two-stage supercharging air inlet cooling system which comprises a high-pressure stage intercooler, an interstage intercooler, a whole vehicle low-temperature heat dissipation water tank and an electronic water pump. A water inlet of the high-pressure stage intercooler and a water inlet of the interstage intercooler are connected with a water outlet of the whole vehicle low-temperature heat dissipation water tank through a first pipeline and a second pipeline respectively. A water outlet of the high-pressure stage intercooler is connected with an inlet of the electronic water pump through a third pipeline, and a water outlet of the interstage intercooler is connected with an inlet of the electronic water pump through a fourth pipeline; a water outlet of the electronic water pump is connected with an inlet of the whole vehicle low-temperature heat dissipation water tank, and a closed-loop cooling system is formed. The cooling system is additionally arranged to cool the air inlet temperature of the engine, so that the air inlet temperature is ensured to be at a better level, and the performance of the engine is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of engine cooling systems, in particular to a two-stage pressurized air intake cooling system and an engine. Background Art

[0002] High-power, high-speed diesel engines are commonly used in power generation stations, petrochemical industries, high-speed light vessels, and naval vessels. These engines are typically four-stroke. Due to their exceptionally high power output, they have higher load requirements than conventional diesel engines. Advanced international high-speed diesel engines boast average effective pressures of up to 3 MPa and peak explosion pressures of up to 20 MPa. Due to their high power and torque requirements, high-performance high-speed diesel engines place significant demands on several key systems, including the cylinder assembly, powertrain, diesel system, cooling system, and lubrication system.

[0003] Existing patent document CN108223096B discloses a cooling system for a V-type multi-cylinder diesel engine, which uses high and low temperature water for separate cooling. Low temperature water cools the oil cooler, and high temperature water cools the cylinder block and cylinder head. This cooling system is a forced closed-circulation water cooling system. This classified cooling of high and low temperature components can reduce the intake temperature and oil temperature, while reducing heat energy loss, making the engine more fuel-efficient.

[0004] The disclosure of the above background technology content is only used to assist in understanding the concept and technical solution of the present utility model. It does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above content has been disclosed on the filing date of this patent application, the above background technology should not be used to evaluate the novelty and creativity of this application. Utility Model Content

[0005] The (main) purpose of the utility model is to provide a two-stage supercharged air intake cooling system and an engine which are independent of the engine cooling system and are specifically used to reduce the intake air temperature.

[0006] To this end, the utility model provides a two-stage supercharged air intake cooling system and an engine.

[0007] Preferably, the present invention may also have the following technical features:

[0008] A two-stage supercharged air intake cooling system includes a high-pressure intercooler, an interstage intercooler, a low-temperature radiator water tank for the entire vehicle, and an electronic water pump. The water inlets of the high-pressure intercooler and the interstage intercooler are connected to the water outlet of the low-temperature radiator water tank for the entire vehicle via a first pipe and a second pipe, respectively. The water outlet of the high-pressure intercooler is connected to the inlet of the electronic water pump via a third pipe, and the water outlet of the interstage intercooler is connected to the inlet of the electronic water pump via a fourth pipe. The water outlet of the electronic water pump is connected to the inlet of the low-temperature radiator water tank for the entire vehicle, forming a closed-loop cooling system.

[0009] Furthermore, it also includes a first flow regulating valve, and the first flow regulating valve is installed on the first pipeline.

[0010] Furthermore, it also includes a second flow regulating valve, and the second flow regulating valve is installed on the second pipeline.

[0011] Furthermore, the interstage intercooler and the high-pressure stage intercooler are both water-to-air heat exchangers.

[0012] Furthermore, it also includes a high-pressure supercharger and a low-pressure supercharger, the air outlet of the low-pressure supercharger is connected to the air inlet of the high-pressure supercharger through a fifth pipeline, and the interstage intercooler is also installed on the fifth pipeline; the air outlet of the high-pressure supercharger is connected to the engine intake pipe through a sixth pipeline, and the high-pressure stage intercooler is also provided on the sixth pipeline.

[0013] An engine includes an engine cooling system and also includes the above-mentioned two-stage supercharged intake air cooling system, wherein the engine cooling system and the two-stage supercharged intake air cooling system are independent of each other.

[0014] Compared with the prior art, the present invention offers the following advantages: By adding a cooling system, the present invention cools the engine intake air, ensuring optimal intake air temperature and improving engine performance. After being supercharged by the low-pressure supercharger, the air's temperature rises, and the interstage intercooler cools the supercharged air. The cooled air then enters the high-pressure supercharger, where its temperature rises again. The high-pressure intercooler cools the supercharged air a second time to below 40°C before it enters the engine's intake manifold. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the present invention, wherein the black arrow 50 is the exhaust flow direction of the exhaust pipe system; the white arrow 40 is the intake direction of the intake pipe system; and the yellow arrow 20 is the circulation direction of the water system.

[0016] Figure 2 It is a waterway schematic diagram of the present utility model. DETAILED DESCRIPTION

[0017] The present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be emphasized that the following description is merely illustrative and is not intended to limit the scope and application of the present invention.

[0018] Non-limiting and non-exclusive embodiments will be described with reference to the following figures, wherein like reference numerals refer to like parts unless otherwise specified.

[0019] like Figures 1-2 The two-stage supercharged intake air cooling system shown includes a high-pressure intercooler 4, an interstage intercooler 3, a low-temperature radiator water tank 2 for the whole vehicle, and an electronic water pump 1. The water inlets of the high-pressure intercooler 4 and the interstage intercooler 3 are connected to the water outlet of the low-temperature radiator water tank 2 for the whole vehicle through a first pipe 7 and a second pipe 8 respectively. The water outlet of the high-pressure intercooler 4 is connected to the inlet of the electronic water pump 1 through a third pipe 6, and the water outlet of the interstage intercooler 3 is connected to the inlet of the electronic water pump 1 through a fourth pipe 5; the water outlet of the electronic water pump 1 is connected to the inlet of the low-temperature radiator water tank 2 for the whole vehicle, forming a closed-loop cooling system. That is to say, the cooling system formed by the high-pressure intercooler 4, the interstage intercooler 3, the vehicle low-temperature radiator water tank 2, and the electronic water pump 1 is independent of the engine cooling system, and the coolants of the two cooling systems are independent of each other, so that the vehicle low-temperature radiator water tank 2 can provide low-temperature coolant for the high-pressure intercooler 4 and the interstage intercooler 3, which can effectively improve the cooling efficiency of the coolant on the intake air.

[0020] It also includes a first flow regulating valve 9 and a second flow regulating valve 10 . The first flow regulating valve 9 is installed on the first pipeline 7 , and the second flow regulating valve 10 is installed on the second pipeline 8 .

[0021] The interstage intercooler and high-pressure intercooler 4 are both water-to-air heat exchangers. The system also includes a high-pressure supercharger 12 and a low-pressure supercharger 11. The outlet of the low-pressure supercharger 11 is connected to the inlet of the high-pressure supercharger 12 via a fifth pipeline. The interstage intercooler 3 is also installed on the fifth pipeline to cool the intake air of the high-pressure supercharger 12. The outlet of the high-pressure supercharger 12 is connected to the engine intake pipe 13 via a sixth pipeline. The high-pressure intercooler 4 is also installed on the sixth pipeline to further cool the engine intake air. In this embodiment, the air temperature rises after being supercharged by the low-pressure supercharger 11. The interstage intercooler 3 then cools the supercharged air down. The cooled air then enters the high-pressure supercharger 12, where it is again supercharged and its temperature rises again. The high-pressure intercooler 4 then cools the supercharged air down to below 40°C before entering the engine intake pipe 13.

[0022] Working principle: The interstage intercooler 3 and the high-pressure stage intercooler 4 are both water-to-air heat exchangers, which mainly cool the pressurized gas through the water cooling system. The flow control valve controls the intake air temperature by adjusting the water flow.

[0023] An engine includes an engine cooling system and also includes the aforementioned two-stage supercharged intake air cooling system. The engine cooling system and the two-stage supercharged intake air cooling system 30 are independent of each other. The engine cooling system is a conventional cooling system of the engine.

[0024] Those skilled in the art will recognize that numerous variations to the foregoing description are possible, and that the examples and figures are intended only to describe one or more specific implementations.

[0025] Although what are considered exemplary embodiments of the present invention have been described and illustrated, it will be understood by those skilled in the art that various changes and substitutions may be made thereto without departing from the spirit of the present invention. In addition, many modifications may be made to adapt a particular situation to the teachings of the present invention without departing from the central concept of the present invention as described herein. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but rather may include all embodiments and their equivalents falling within the scope of the present invention.

Claims

1. A two-stage supercharged air intake cooling system, characterized by: It includes a high-pressure intercooler, an interstage intercooler, a low-temperature radiator water tank for the whole vehicle, and an electronic water pump. The water inlets of the high-pressure intercooler and the interstage intercooler are connected to the water outlet of the low-temperature radiator water tank for the whole vehicle through a first pipeline and a second pipeline respectively. The water outlet of the high-pressure intercooler is connected to the inlet of the electronic water pump through a third pipeline, and the water outlet of the interstage intercooler is connected to the inlet of the electronic water pump through a fourth pipeline; the water outlet of the electronic water pump is connected to the inlet of the low-temperature radiator water tank for the whole vehicle, forming a closed-loop cooling system.

2. The dual-stage supercharged intake air cooling system according to claim 1, characterized in that: It also includes a first flow regulating valve, which is installed on the first pipeline.

3. The dual-stage supercharged intake air cooling system according to claim 1, characterized in that: It also includes a second flow regulating valve, and the second flow regulating valve is installed on the second pipeline.

4. The dual-stage supercharged intake air cooling system according to claim 1, characterized in that: The interstage intercooler and the high-pressure stage intercooler are both water-to-air heat exchangers.

5. The dual-stage supercharged intake air cooling system according to claim 4, characterized in that: It also includes a high-pressure supercharger and a low-pressure supercharger. The air outlet of the low-pressure supercharger is connected to the air inlet of the high-pressure supercharger through a fifth pipeline, and the interstage intercooler is also installed on the fifth pipeline; the air outlet of the high-pressure supercharger is connected to the engine intake pipe through a sixth pipeline, and the high-pressure stage intercooler is also provided on the sixth pipeline.

6. An engine, comprising an engine cooling system, characterized in that: It also includes the dual-stage supercharged intake air cooling system according to claim 1, wherein the engine cooling system and the dual-stage supercharged intake air cooling system are independent of each other.

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