CN112443421A

CN112443421A - Engine exhaust gas energy recycling device and working method thereof

Info

Publication number: CN112443421A
Application number: CN201910834917.4A
Authority: CN
Inventors: 罗亨波; 陈泓; 李钰怀; 冶麟
Original assignee: Guangzhou Automobile Group Co Ltd
Current assignee: Guangzhou Automobile Group Co Ltd
Priority date: 2019-09-04
Filing date: 2019-09-04
Publication date: 2021-03-05

Abstract

The invention relates to the technical field of automobile engines, and discloses an engine exhaust gas energy recycling device and a working method thereof, wherein the engine exhaust gas energy recycling device comprises an air cylinder body, a pump body, a heat insulation box and an air cylinder cover which is hermetically connected to the air cylinder body; a liquid heat-conducting medium is arranged in the heat-insulating box, and the pump body is connected to the liquid inlet of the heat-insulating box; a first flow passage is arranged on the outer side of an air inlet passage of the cylinder cover, a second flow passage is arranged on the outer side of an exhaust passage of the cylinder cover, and a third flow passage is arranged on the outer side of the cylinder body; the first flow channel is communicated with the third flow channel, the second flow channel and the third flow channel are communicated with the pump body through a first pipeline switching device, and the first flow channel and the second flow channel are communicated with a liquid outlet of the heat preservation box through a second pipeline switching device. The waste energy recycling device of the engine can reduce the warm-up time of the homogeneous compression ignition engine, ensure the stability of the engine during low-load combustion and improve the energy-saving potential of the engine.

Description

Engine exhaust gas energy recycling device and working method thereof

Technical Field

The invention relates to the technical field of automobile engines, in particular to an engine exhaust gas energy recycling device and a working method thereof.

Background

A homogeneous compression ignition gasoline engine (HCCI engine) is a novel combustion mode based on a previous compound gasoline engine, and like the traditional gasoline engine, air and fuel mixed gas with a very uniform proportion is injected into a cylinder, the traditional gasoline engine is ignited by a spark plug to ignite the air and fuel mixed gas to generate energy, but the HCCI engine automatically combusts when the temperature of the mixed gas is raised to a certain degree by compressing the mixed gas by a piston in the ignition process, and the combustion speed is high and the isochoric degree is high. However, when the homogeneous charge compression ignition engine is started at normal temperature, the overall temperature level is low, the combustion time is difficult to control, ignition is usually assisted by a spark plug, a period of time is required for switching the engine operation mode from the spark plug ignition mode to the HCCI mode in the normal temperature starting state, the improvement of the thermal efficiency is limited due to long warm-up time, and the combustion of the homogeneous charge compression ignition engine under low load is very unstable.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide an engine exhaust gas energy recycling device and a working method thereof, which can reduce the warm-up time of a homogeneous charge compression ignition engine, ensure the stability of the engine during low-load combustion and improve the energy-saving potential of the engine.

In order to achieve the above object, the present invention provides an engine exhaust energy recycling device, which includes a cylinder block, a pump body, an incubator, and a cylinder head hermetically connected to the cylinder block;

a liquid heat-conducting medium is arranged in the heat-insulating box, and the pump body is connected to the liquid inlet of the heat-insulating box;

a first flow passage is arranged on the outer side of an air inlet passage of the cylinder cover, a second flow passage is arranged on the outer side of an exhaust passage of the cylinder cover, and a third flow passage is arranged on the outer side of the cylinder body;

the first flow channel is communicated with the third flow channel, the second flow channel and the third flow channel are communicated with the pump body through a first pipeline switching device, and the first flow channel and the second flow channel are communicated with a liquid outlet of the heat preservation box through a second pipeline switching device.

Optionally, the first pipeline switching device includes a first valve and a second valve that are independent of each other, the second flow channel is communicated with the pump body through a first pipeline, the first valve is disposed on the first pipeline, the third flow channel is communicated with the pump body through a second pipeline, and the second valve is disposed on the second pipeline.

Optionally, the second pipeline switching device includes a third valve and a fourth valve that are independent of each other, the first flow channel is communicated with the heat preservation box through a third pipeline, the third valve is disposed on the third pipeline, the second flow channel is communicated with the heat preservation box through a fourth pipeline, and the fourth valve is disposed on the fourth pipeline.

Optionally, the outer walls of the first pipeline, the second pipeline, the third pipeline and the fourth pipeline are all provided with insulating layers.

Optionally, the heat insulation box comprises a first box body and a second box body, the first box body is sleeved outside the second box body, a liquid storage cavity is formed in the second box body, and the liquid heat conducting medium is arranged in the liquid storage cavity.

Optionally, the second box body is fixedly connected inside the first box body through a support frame, and a heat preservation cavity is formed between the outer wall of the second box body and the inner wall of the first box body.

Optionally, the liquid heat-conducting medium is mercury.

Optionally, the first flow passage is annularly arranged on the outer side of an air inlet passage of the cylinder head, the second flow passage is annularly arranged on the outer side of an exhaust passage of the cylinder head, and the third flow passage is annularly arranged on the outer side of the cylinder block.

Optionally, an intake valve, an exhaust valve, a spark plug and a fuel injector are arranged on the cylinder cover;

the intake valve extends into the cylinder head through the first flow passage and the exhaust valve extends into the cylinder head through the second flow passage;

the spark plug and the fuel injector are respectively inserted on the cylinder cover in a sealing manner, and both the spark plug and the fuel injector are positioned between the first flow passage and the second flow passage.

The invention also provides an operating method based on the engine exhaust gas energy recycling device, which comprises the following steps:

when the engine runs at medium and high load, a pump body is started, the first pipeline switching device controls the second flow channel to be communicated with the pump body, the third flow channel is disconnected from the pump body, the second pipeline switching device controls the second flow channel to be communicated with the heat insulation box, and the first flow channel is disconnected from the heat insulation box;

when the engine runs in cold start or low load, the pump body is opened, the first pipeline switching device controls the third flow channel to be communicated with the pump body, the second flow channel is disconnected from the pump body, the second pipeline switching device controls the first flow channel to be communicated with the heat insulation box, and the second flow channel is disconnected from the heat insulation box.

Compared with the prior art, the engine exhaust gas energy recycling device and the working method thereof have the advantages that:

the engine exhaust gas energy recycling device and the working method thereof provided by the embodiment of the invention have the advantages that the first flow channel is arranged on the outer side of the air inlet channel of the cylinder cover, the second flow channel is arranged on the outer side of the exhaust channel of the cylinder cover, the third flow channel is arranged on the outer side of the cylinder body, the first flow channel, the second flow channel and the third flow channel are connected with the heat preservation box to form a pipeline system, when the engine runs under a high load state, the first pipeline switching device and the second pipeline switching device control the liquid heat-conducting medium in the heat preservation box to flow between the second flow channel and the heat preservation box, so that the liquid heat-conducting medium flows from the heat preservation box to the second flow channel, then flows to the circulation state of the heat preservation box through the pump body, and the energy is stored in the heat. When the engine runs in a cold start state or a low-load state, the first pipeline switching device and the second pipeline switching device control the flow of the liquid heat-conducting medium in the heat-insulating box among the first flow channel, the third sixth flow channel and the heat-insulating box to form a circulating state that the liquid heat-conducting medium flows from the heat-insulating box to the first flow channel and to the third flow channel, then flows to the heat-insulating box through the pump body, the high-temperature liquid heat-conducting medium is used for heating the inlet air, and the air cylinder is heated at the same time, so that the heat transfer loss of combustion is reduced, the warm-up time in the cold start state is shortened; and the combustion stability in low load can be effectively improved, the hydrocarbon emission caused by fire is reduced, and the heat efficiency is further improved. Whole device structural design is simple, and control is convenient, and the cost is lower, can make full use of the energy of the waste gas of emission, improves the income.

Drawings

FIG. 1 is a schematic view showing the overall construction of an engine exhaust energy reuse apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic top view of an incubator of the engine exhaust energy recycling apparatus according to the embodiment of the present invention;

fig. 3 is a flowchart of an operating method of the engine exhaust energy reusing device according to the embodiment of the present invention.

In the figure, 1, a cylinder block; 2. a pump body; 3. a heat preservation box; 31. a first case; 32. a second case; 33. a liquid storage cavity; 34. a support frame; 35. a heat preservation cavity; 36. a liquid inlet; 37. a liquid outlet; 4. a cylinder head; 41. an air intake passage; 42. an exhaust passage; 5. a first flow passage; 6. a second flow passage; 7. a third flow path; 8. a first valve; 9. a second valve; 10. a first conduit; 11. A second conduit; 12. a third valve; 13. a fourth valve; 14. a third pipeline; 15. a fourth conduit; 16. an intake valve; 17. an exhaust valve; 18. a spark plug; 19. and a fuel injector.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

As shown in fig. 1 to 3, an engine exhaust energy reusing device according to a preferred embodiment of the present invention, which comprises a cylinder body 1, a pump body 2, an insulation can 3 and a cylinder cover 4 which is connected with the cylinder body 1 in a sealing way, a liquid heat-conducting medium is arranged in the heat-insulating box 3, the pump body 2 is connected with a liquid inlet 36 of the heat-insulating box 3, a first flow passage 5 is provided outside an intake passage 41 of the cylinder head 4, a second flow passage 6 is provided outside an exhaust passage 42 of the cylinder head 4, a third flow passage 7 is arranged on the outer side of the cylinder block 1, the first flow passage 5 is communicated with the third flow passage 7, the second flow passage 6 and the third flow passage 7 are communicated with the pump body 2 through a first pipeline switching device, the first flow passage 5 and the second flow passage 6 are communicated with the liquid outlet 37 of the heat preservation box 3 through a second pipeline switching device.

Based on the above structure, the cylinder head 4 is hermetically connected to the cylinder block 1, the first flow channel 5 is disposed outside the air inlet channel 41 of the cylinder head 4, the second flow channel 6 is disposed outside the air outlet channel 42 of the cylinder head 4, the third flow channel 7 is disposed outside the cylinder block 1, and a pipeline system is formed by connecting the first flow channel 5, the second flow channel 6, the third flow channel 7, and the insulation can 3, in which the pump body 2 is connected to the liquid inlet 36 of the insulation can 3, the first flow channel 5 and the second flow channel 6 are respectively communicated with the liquid outlet 37 of the insulation can 3, and the second flow channel 6 and the third flow channel 7 are respectively communicated with the pump body 2. Therefore, in the actual working process, when the energy of the exhaust gas is utilized, the pump body 2 is opened, the first pipeline switching device is needed to control the second flow channel 6 to be communicated with the pump body 2, the third flow channel 7 is closed to be communicated with the pump body 2, the second pipeline switching device is needed to control the second flow channel 6 to be communicated with the liquid outlet 37 of the heat insulation box 3, the first flow channel 5 is closed to be communicated with the heat insulation box 3, the pump body 2 works normally, the liquid heat-conducting medium in the heat insulation box 3 can be pumped into the second flow channel 6 through the second pipeline switching device, the liquid heat-conducting medium is formed in a circulating state from the heat insulation box 3 to the second flow channel 6, and flows back to the heat insulation box 3 again after passing through the pump body 2. When the engine runs under medium and high load, the highest exhaust temperature can reach 800 ℃, so that the circulating liquid heat-conducting medium in the state can fully absorb the energy in the exhaust gas, improve the temperature of the liquid heat-conducting medium per se and finally flow back to the heat insulation box 3 for storage, when the liquid heat-conducting medium in the heat insulation box 3 is heated to 300 ℃, the pump body 2 stops working, the first pipeline switching device and the second pipeline switching device are closed, and the heat insulation box 3 can insulate the high-temperature liquid heat-conducting medium in the heat insulation box and keep the temperature of the high-temperature liquid heat-conducting medium not lower than 280 ℃ within 24 hours. When the engine is in cold start or low load, the pump body 2 is opened, the third flow channel 7 is controlled to be communicated with the pump body 2 through the first pipeline switching device, the communication between the second flow channel 6 and the pump body 2 is closed, the first flow channel 5 is controlled to be communicated with the heat insulation box 3 through the second pipeline switching device, and the communication between the second flow channel 6 and the heat insulation box 3 is closed, so that the liquid heat-conducting medium in the heat insulation box 3 can be pumped into the first flow channel 5 through the second pipeline switching device, a circulating state that the liquid heat-conducting medium flows from the heat insulation box 3 to the first flow channel 5, and flows back to the heat insulation box 3 through the third flow channel 7 is formed. In the process, the high-temperature liquid heat-conducting medium can heat the air in the air inlet channel 41 and can also heat the cylinder body 1, so that the heat transfer loss of combustion is effectively reduced, the warm-up time is reduced, the time for switching the engine from an Ignition mode to an HCCI (Homogeneous Charge Compression Ignition), which means 'Homogeneous Charge Compression Ignition', is a novel combustion mode based on an Otto reciprocating gasoline engine and is simply a Compression Ignition mode of the gasoline engine, the combustion stability of the engine under low load is improved, and compared with electric heating, the energy can be saved. The device's structural design is very simple, and control is convenient, and the cost is lower, can carry out effectual utilization to waste energy, the energy saving, and the income is great, is fit for using widely.

The first pipeline switching device comprises a first valve 8 and a second valve 9 which are mutually independent, the second flow passage 6 is communicated with the pump body 2 through a first pipeline 10, the first valve 8 is arranged on the first pipeline 10, the third flow passage 7 is communicated with the pump body 2 through a second pipeline 11, and the second valve 9 is arranged on the second pipeline 11. Therefore, the flow channels are respectively connected through pipelines to provide a corresponding basis for the flow of the liquid heat-conducting medium, the communication conditions between the second flow channel 6 and the third flow channel 7 and the pump body 2 are controlled to be mutually independent through the first pipeline switching device, when the high load of the engine is needed, the temperature of the liquid heat-conducting medium in the heat insulation box 3 needs to be improved by utilizing the energy of exhaust gas, the first valve 8 on the first pipeline 10 is controlled to be opened, the second valve 9 on the second pipeline 11 is controlled to be closed, and therefore the liquid heat-conducting medium entering the second flow channel 6 outside the exhaust pipeline can be returned to the heat insulation box 3 again, and the third flow channel 7 does not interfere with the flow of the liquid heat-conducting medium. The second pipeline switching device comprises a third valve 12 and a fourth valve 13 which are mutually independent, the first flow passage 5 is communicated with the heat preservation box 3 through a third pipeline 14, the third valve 12 is arranged on the third pipeline 14, the second flow passage 6 is communicated with the heat preservation box 3 through a fourth pipeline 15, and the fourth valve 13 is arranged on the fourth pipeline 15. Therefore, the communication conditions between the first flow channel 5 and the second flow channel 6 controlled by the second pipeline switching device and the liquid outlet 37 of the insulation can 3 are mutually independent, when the engine enters cold start or low load, the gas in the gas inlet channel 41 needs to be heated by the high-temperature liquid heat-conducting medium in the insulation can 3, the third valve 12 on the third pipeline 14 needs to be controlled to be opened, and the fourth valve 13 on the fourth pipeline 15 needs to be controlled to be closed, so that the high-temperature liquid heat-conducting medium in the insulation can 3 can enter the first flow channel 5 through the third pipeline 14 to heat the inlet gas, and the waste of energy caused by the high-temperature liquid heat-conducting medium entering the second flow channel 6 is prevented.

Furthermore, the first valve 8, the second valve 9, the third valve 12 and the fourth valve 13 are matched with each other to recycle the exhaust energy simply and effectively, and when the engine is in high load, the first valve 8 and the fourth valve 13 are opened, and the second valve 9 and the third valve 12 are closed, so that the liquid medium circulates between the heat preservation box 3 and the second flow passage 6 outside the exhaust pipeline, and the temperature of the liquid heat-conducting medium is increased. When the engine is in cold start and low load, the second valve 9 and the third valve 12 are opened, and the first valve 8 and the fourth valve 13 are closed, so that the high-temperature liquid heat-conducting medium can flow through the first flow passage 5 and the third flow passage 7 from the insulation can 3 and then return to the insulation can 3, and the circulation is realized, so that the temperature of air in the engine air inlet channel 41 is increased, the warm-up time is shortened, and the heat efficiency is improved. In addition, the outer walls of the first pipeline 10, the second pipeline 11, the third pipeline 14 and the fourth pipeline 15 are provided with the heat preservation layers, so that heat loss when the liquid heat-conducting medium flows in the first pipeline 10, the second pipeline 11, the third pipeline 14 and the fourth pipeline 15 can be effectively reduced, and the quality of the high-temperature liquid heat-conducting medium can be reliably guaranteed. The first pipeline 10 and the second pipeline 11 may be mutually independent pipelines, or after the first pipeline 10 and the second pipeline 11 are communicated as shown in this embodiment, the second pipeline 11 is communicated with the pump body 2; the third pipeline 14 and the fourth pipeline 15 may be pipelines independently arranged from each other, or the fourth pipeline 15 and the third pipeline 14 shown in this embodiment may be communicated with each other, and the third pipeline 14 is communicated with the liquid outlet 37 of the incubator 3, so that the pipelines can be simply arranged, and the overall structure is simpler.

In addition, insulation can 3 includes first box 31 and second box 32, and the outside of second box 32 is located to first box 31 cover, and inside stock solution chamber 33 that is provided with of second box 32, liquid heat-conducting medium set up inside stock solution chamber 33, and the liquid heat-conducting medium that is located stock solution chamber 33 can receive the effective heat preservation of the lateral wall of first box 31 and second box 32, guarantees the reliability of self temperature. And the second box 32 passes through the inside of support frame 34 fixed connection in first box 31, and is formed with heat preservation chamber 35 between the outer wall of second box 32 and the inner wall of first box 31, can be the cavity that adds corresponding insulation material in the heat preservation chamber 35, and then heat preservation chamber 35 can be with the lateral wall of first box 31 and the lateral wall combined action of second box 32, guarantees that the 300 ℃ liquid heat-conducting medium that is located liquid storage cavity 33 can be in 24 hours, and the temperature is not less than 280 ℃, very big reduction liquid heat-conducting medium's energy is lost. It should be noted that the side walls of the first box 31 and the second box 32 of the thermal insulation box 3 may be made of thermal insulation materials, or may be covered with corresponding thermal insulation materials, so as to achieve corresponding thermal insulation effects. In this embodiment, the liquid heat-conducting medium is mercury, and liquid mercury has a high heat-conducting coefficient in liquid, and is rapid in heat conduction, and has a boiling point as high as 356.6 ℃, so that vaporization is not easy to occur.

Referring to fig. 1, the first flow channel 5 is annularly arranged on the outer side of the air inlet channel 41 of the cylinder head 4, the second flow channel 6 is annularly arranged on the outer side of the air outlet channel 42 of the cylinder head 4, and the third flow channel 7 is annularly arranged on the outer side of the cylinder block 1, so that the contact area between the liquid heat-conducting medium and the air outlet channel 42 after the liquid heat-conducting medium enters the second flow channel 6 can be effectively increased, the utilization rate of the air outlet temperature can be increased, the liquid heat-conducting medium can be conveniently and rapidly increased in temperature, and the working efficiency of the device is effectively improved. The first flow channel 5 and the third flow channel 7 are arranged on the outer side of the air inlet channel 41 and the cylinder body 1 respectively, so that the high-temperature liquid heat-conducting medium can be fully contacted with the air inlet channel 41 and the cylinder body 1, the heating efficiency is improved, the heat transfer loss of combustion in the cylinder is reduced, and the combustion stability is improved conveniently. The cylinder cover 4 is provided with an intake valve 16, an exhaust valve 17, a spark plug 18 and an oil injector 19, the intake valve 16 penetrates through the first flow passage 5 and extends into the cylinder cover 4, the exhaust valve 17 penetrates through the second flow passage 6 and extends into the cylinder cover 4, the spark plug 18 and the oil injector 19 are respectively inserted on the cylinder cover 4 in a sealing mode, the spark plug 18 and the oil injector 19 are both located between the first flow passage 5 and the second flow passage 6, the spark plug 18 is sealed through threads, and the oil injector 19 is connected through a pressing block in a sealing mode, so that the rationality of the whole structural layout is improved, and the normal work of the automobile engine device is.

Referring to fig. 3, an embodiment of the present invention further provides an operating method based on the above engine exhaust energy recycling device, which includes the following steps:

s1, when the engine runs at medium and high load, the pump body 2 is opened, the first pipeline switching device controls the second flow passage 6 to be communicated with the pump body 2, the third flow passage 7 is disconnected from the pump body 2, the second pipeline switching device controls the second flow passage 6 to be communicated with the heat insulation box 3, and the first flow passage 5 is disconnected from the heat insulation box 3;

s2, when the engine runs in cold start or low load, the pump body 2 is opened, the first pipeline switching device controls the third flow channel 7 to be communicated with the pump body 2, the second flow channel 6 is disconnected from the pump body 2, the second pipeline switching device controls the first flow channel 5 to be communicated with the heat insulation box 3, and the second flow channel 6 is disconnected from the heat insulation box 3.

Specifically, (1) when the engine is running at a medium-high load, the pump body 2 is opened, the first valve 8 of the first pipeline switching device is opened, the second valve 9 is closed, the second flow channel 6 is controlled to be communicated with the pump body 2, the fourth valve 13 of the second pipeline switching device is opened, the third valve 12 is closed, the second flow channel 6 is controlled to be communicated with the heat insulation box 3, so that the liquid heat-conducting medium is in a circulating state of flowing from the heat insulation box 3 into the second flow channel 6 and flowing back into the heat insulation box 3 after passing through the pump body 2, and the liquid heat-conducting medium is heated. When the mercury in the heat preservation box 3 is heated to 300 ℃, the pump body 2 stops running, the first valve 8 and the fourth valve 13 are also closed, so that the heat preservation box 3 stores the liquid heat-conducting medium for use when needed.

(2) When the engine is in cold start or low load operation, the pump body 2 is opened, the second valve 9 of the first pipeline switching device is opened, the first valve 8 is closed, the third flow channel 7 is controlled to be communicated with the pump body 2, the third valve 12 of the second pipeline switching device is opened, the fourth valve 13 is closed, and the first flow channel 5 is controlled to be communicated with the heat insulation box 3, so that the liquid heat-conducting medium forms a circulating state that the liquid heat-conducting medium flows into the first flow channel 5 from the heat insulation box 3 and flows back into the heat insulation box 3 after passing through the third flow channel 7, and the air in the air inlet channel 41 and the cylinder body 1 are heated by the high-temperature liquid heat-conducting medium. The heat transfer loss of combustion is reduced, and the warm application time is greatly reduced. This process enables a substantial reduction in the time for switching from the ignition mode to the HCCI mode by the spark plug 18 at cold start of the HCCI engine, providing combustion stability for HCCI engine at low loads.

(3) When the pump body 2 is opened, namely the pump body operates again at medium and high load, the first valve 8 of the first pipeline switching device is opened, the second valve 9 is closed, the fourth valve 13 of the second pipeline switching device is opened, the third valve 12 is closed, and the steps (1) and (2) are repeated.

The invention also provides an automobile which comprises the engine waste energy recycling device.

In summary, the embodiment of the present invention provides an engine exhaust energy recycling device and a working method thereof, by providing the first flow passage 5 outside the intake passage 41 of the cylinder head 4, the second flow passage 6 outside the exhaust passage 42 of the cylinder head 4, and a third flow passage 7 is arranged on the outer side of the cylinder body 1, and the first flow passage 5, the second flow passage 6 and the third flow passage 7 are connected with the heat preservation box 3 to form a pipeline system, when the engine runs in a high-load state, the first pipeline switching device and the second pipeline switching device control the liquid heat-conducting medium in the heat preservation box 3 to flow between the second flow channel 6 and the heat preservation box 3 to form a circulation state that the liquid heat-conducting medium flows from the heat preservation box 3 to the second flow channel 6 and then flows to the heat preservation box 3 through the pump body 2, and energy is stored in the heat preservation box 3 by utilizing the high heat-conducting performance and the high boiling point performance of the liquid heat-conducting medium. When the engine runs in a cold start state or a low-load state, the first pipeline switching device and the second pipeline switching device control the flow of the liquid heat-conducting medium in the insulation can 3 among the first flow channel 5, the third sixth flow channel and the insulation can 3 to form a circulating state that the liquid heat-conducting medium flows from the insulation can 3 to the first flow channel 5 and to the third flow channel 7, then flows through the pump body 2 to the insulation can 3, the high-temperature liquid heat-conducting medium is used for heating the inlet air, and simultaneously the air cylinder is heated, so that the heat transfer loss of combustion is reduced, the warm-up time during the cold start is shortened, and the heat efficiency is improved; and the combustion stability in low load can be effectively improved, the hydrocarbon emission caused by fire is reduced, and the heat efficiency is further improved. Whole device structural design is simple, and control is convenient, and the cost is lower, can make full use of the energy of the waste gas of emission, improves the income.

It should be understood that the terms "first", "second", etc. are used herein to describe various information, but the information should not be limited to these terms, which are only used to distinguish one type of information from another. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present invention.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. The engine exhaust energy recycling device is characterized by comprising a cylinder body, a pump body, a heat insulation box and a cylinder cover hermetically connected to the cylinder body;

2. The engine exhaust energy reusing device according to claim 1, wherein the first line switching means includes a first valve and a second valve independent of each other, the second flow passage communicates with the pump body through a first pipe, the first valve is provided on the first pipe, the third flow passage communicates with the pump body through a second pipe, and the second valve is provided on the second pipe.

3. The engine exhaust energy reusing device according to claim 2, wherein the second line switching means includes a third valve and a fourth valve independent of each other, the first flow passage communicates with the incubator through a third line, the third valve is provided on the third line, the second flow passage communicates with the incubator through a fourth line, and the fourth valve is provided on the fourth line.

4. The engine exhaust energy recycling device of claim 3, wherein an insulating layer is disposed on the outer walls of the first, second, third, and fourth pipes.

5. The engine exhaust energy recycling device according to any one of claims 1 to 4, wherein the heat insulation box includes a first box body and a second box body, the first box body is sleeved outside the second box body, a liquid storage cavity is provided inside the second box body, and the liquid heat transfer medium is provided inside the liquid storage cavity.

6. The engine exhaust energy recycling device according to claim 5, wherein the second casing is fixedly connected to the inside of the first casing by a support frame, and a heat-insulating chamber is formed between an outer wall of the second casing and an inner wall of the first casing.

7. The engine exhaust energy reuse apparatus according to any one of claims 1 to 4, wherein the liquid heat transfer medium is mercury.

8. The engine exhaust energy recycling device according to any one of claims 1 to 4, wherein the first flow passage is provided around an outside of an intake passage of the cylinder head, the second flow passage is provided around an outside of an exhaust passage of the cylinder head, and the third flow passage is provided around an outside of the cylinder block.

9. The engine exhaust energy recycling device according to claim 8, wherein an intake valve, an exhaust valve, a spark plug, and a fuel injector are provided on the cylinder head;

10. An operating method of an engine exhaust energy reusing device according to any one of claims 1 to 9, comprising the steps of: