WO2021017973A1

WO2021017973A1 - Engine system and vehicle

Info

Publication number: WO2021017973A1
Application number: PCT/CN2020/103492
Authority: WO
Inventors: 张尚; 徐秀兰; 李红政; 刘占强; 时双; 刘翠; 王浩雷; 蔡永庆; 佟世城; 李若予
Original assignee: 长城汽车股份有限公司
Priority date: 2019-07-26
Filing date: 2020-07-22
Publication date: 2021-02-04
Also published as: CN210217931U

Abstract

Disclosed is an engine system (100), comprising: a cylinder block assembly, the cylinder block assembly comprising a cylinder block (10) and a cylinder head (30), wherein a cylinder (11) is defined by the cylinder block (10), the cylinder head (30) is arranged at the top of the cylinder block (10) and defines an oil channel (13), one side of the cylinder block assembly is an intake side, and the other side of the cylinder block assembly is an exhaust side; a water jacket (12), wherein the water jacket (12) comprises a rising water channel (122) arranged on the exhaust side and extending in a vertical direction, and a top water channel (123) in communication with the rising water channel (122) and extending in the direction of the intake side from the exhaust side; and a gas channel portion (20), wherein the gas channel portion (20) comprises an exhaust channel (21) and an EGR gas channel (22), the exhaust channel (21) is in communication with an exhaust port of the cylinder (11), and at least part of the exhaust channel (21) is embedded into the top water channel (123). On the basis of the engine system, the problem of slow temperature rise of engine oil in an oil channel in a high-latitude cold environment or a low-temperature environment is solved, such that the lubricating performance of the engine oil is improved, and the running resistance of an engine is reduced. Further provided is a vehicle comprising the engine system (100).

Description

Engine system and vehicle

Cross references to related applications

This application claims the rights and interests of the Chinese patent application 201921196240.8 filed on July 26, 2019, the content of which is incorporated herein by reference.

Technical field

The present invention relates to the field of vehicle technology, and more specifically, to an engine system and a vehicle.

Background technique

Diesel engines have the problem that the coolant temperature rises slowly after the cold engine is started, which causes the oil temperature to rise slowly, reduces the lubricating performance of the oil, increases the engine running resistance, and increases the wear between the internal movement pairs of the diesel engine, and at the same time in the high-cold area or low-temperature environment The warm air temperature rises slowly. In order to solve the slow rise of the coolant temperature after the cold start of the diesel engine, the engine cylinder temperature is usually increased by increasing the fuel injection and increasing the EGR rate, so as to achieve the purpose of rapid warm-up.

However, the increase in fuel injection will increase fuel consumption, increase the EGR rate of the exhaust gas recirculation system, and further increase the emission smoke. With the stricter emission regulations, the use of post-processing equipment will shorten the DPF regeneration mileage of the particulate trap and increase the oil Dilution risk.

Summary of the invention

The present invention aims to solve one of the above technical problems at least to a certain extent.

For this reason, the present invention proposes an engine system, the engine oil of the engine system heats up quickly and the engine running resistance is small.

The present invention also provides a vehicle with the above engine system, which has a long service life and a good driving experience.

The engine system according to the first aspect of the present invention includes: a cylinder block assembly, the cylinder block assembly includes: a cylinder block and a cylinder head, wherein the cylinder block defines a cylinder; the cylinder head is provided on the cylinder block The top part defines an oil passage, one side of the cylinder block assembly is the intake side, and the other side is the exhaust side; a water jacket, the water jacket includes a rising water passage arranged on the exhaust side and extending in the up and down direction and A top water passage communicating with the rising water passage and extending from the exhaust side to the intake side; an air passage part, the air passage part includes an exhaust passage and an EGR air passage, wherein the exhaust passage is connected to the cylinder The exhaust port is in communication with the exhaust passage, and the exhaust passage is at least partially embedded in the top water passage, and the EGR passage is in communication with the intake port of the cylinder and the exhaust passage.

According to the engine system of the embodiment of the present invention, by embedding at least a part of the exhaust duct in the top water duct, the temperature rise of the coolant in the water jacket is accelerated, and the temperature of the oil in the oil duct is rapidly increased, avoiding the high-cold or low-temperature environment Under conditions, the slow temperature rise of the oil in the oil passage occurs, which improves the lubrication performance of the oil and reduces the resistance of the engine.

In addition, the engine system according to the embodiment of the present invention may also have the following additional technical features:

According to some embodiments of the present invention, a plurality of first heat sinks are provided between the exhaust duct and the inner wall surface of the water jacket, and the first heat sinks are located on the exhaust side.

According to some embodiments of the present invention, the EGR air passage is coupled to the cylinder head and arranged adjacent to the oil passage, and a second heat sink is provided between the EGR air passage and the inner wall surface of the water passage. sheet.

In an alternative embodiment, the heat dissipation area of the second heat sink gradually decreases from the exhaust side to the intake side.

In an alternative embodiment, the EGR air passage is a curved air passage.

According to some embodiments of the present invention, the EGR air passage is arranged adjacent to the oil passage, and the top water passage and the oil passage are separated by a third heat sink.

In an alternative embodiment, a water pump is provided at the bottom end of the intake side of the cylinder, and the water jacket further includes a bottom water channel which is respectively connected to the outlet of the water pump and the rising water channel, and the inlet The air side is also provided with a downward water channel, and the downward water channel is respectively connected with the top water channel and the inlet of the water pump.

In an alternative embodiment, the cylinder block defines a plurality of cylinders, each cylinder is provided with a combined channel in the circumferential direction, and each combined channel includes a plurality of ascending channels, wherein the total number of the combined channels located upstream The flow area is smaller than the total flow area of the combined channel located downstream.

In an alternative embodiment, the top water passage includes an upstream section, a middle section, and a downstream section that are sequentially connected from the exhaust side to the intake side, and the flow area of the middle section is smaller than that of the upstream section and the downstream section. Circulation area.

The vehicle according to the second aspect of the present invention includes the engine system for the vehicle of the above embodiment, because the engine system according to the embodiment of the present invention solves the problem of slow oil temperature rise, large engine resistance, and slow temperature rise of the heating system in high-cold areas and low-temperature environments Therefore, the vehicle according to the embodiment of the present invention has a long life and a good driving experience.

The additional aspects and advantages of the present invention will be partly given in the following description, and part of them will become obvious from the following description, or be understood through the practice of the present invention.

Description of the drawings

The above and/or additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, in which:

Figure 1 is a schematic view of the structure of a cylinder according to some embodiments of the present invention;

2 is a schematic diagram of the flow of coolant in a water jacket of an engine system according to some embodiments of the present invention;

Figure 3 is an angled partial cross-sectional view of an engine system according to some embodiments of the present invention;

4 is another partial cross-sectional view of the engine system according to some embodiments of the present invention;

Figure 5 is another partial cross-sectional view of the engine system according to some embodiments of the present invention;

Fig. 6 is another perspective partial cross-sectional view of an engine system according to some embodiments of the present invention.

Reference signs:

Engine system 100;

Cylinder body 10; Cylinder 11; Water jacket 12; Bottom channel 121; Ascending channel 122; Top channel 123; Upstream section 1231; Midstream section 1232; Downstream channel 124; Oil channel 13;

Port portion 20; exhaust port 21; EGR port 22;

Cylinder head 30;

First heat sink 40;

Second heat sink 50;

Water pump 60;

The third heat sink 70.

Detailed ways

The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the present invention, but should not be construed as limiting the present invention.

Referring to FIGS. 1 to 6, an engine system 100 according to an embodiment of the present invention will be described. The engine system 100 includes a cylinder block assembly, a water jacket 12 and an air passage portion 20. Wherein, the cylinder head assembly includes a cylinder block 10 and a cylinder head 30, the cylinder block 10 defines a cylinder 11, the cylinder head 30 is arranged on the top of the cylinder block 10 and defines an oil passage 13, and one side of the cylinder block assembly is The intake side, the other side is the exhaust side.

Specifically, as shown in FIG. 1 in combination with FIG. 2 and FIG. 6, the cylinder block 10 defines a cylinder 11, a water jacket 12 and an oil passage 13, and the water jacket 12 is arranged adjacent to the oil passage 13. When the engine is working, the cylinder 11 releases a large amount of heat, and the coolant in the water jacket 12 is used to absorb the heat released when the cylinder 11 burns, and transfer at least part of the heat to the oil passage 13 to ensure that the oil in the oil passage 13 is fully dissolved when heated. Wherein, the number of cylinders 11 may be two or more, for example, as shown in FIG. 1, the cylinder block includes four cylinders.

As shown in FIGS. 2-6, the water jacket 12 includes a rising water passage 122 arranged on the exhaust side and extending in the vertical direction, and a top part communicating with the rising water passage 122 and extending from the exhaust side to the intake side. Waterway 123. That is, the coolant in the water jacket 12 flows from bottom to top, and then flows from the exhaust side to the intake side. In this way, the coolant can fully absorb the heat of the exhaust gas from the cylinder 11 and quickly increase the temperature of the coolant.

Specifically, as shown in Figures 4 to 5, the ascending water passage 122 is three upper water passages arranged on the exhaust side of the cylinder block assembly, and two of the three upper water passages are respectively arranged on both sides of the exhaust passage. , One is arranged below the exhaust duct, the coolant can fully absorb the heat of the exhaust gas from the cylinder 11, and the temperature of the coolant can be quickly increased.

The air duct portion 20 includes an exhaust duct 21 and an EGR duct 22. The exhaust duct 21 is connected to the exhaust port of the cylinder 11 and the exhaust duct 21 is at least partially embedded in the top water duct 123. The EGR duct 22 and the cylinder The intake port of 11 communicates with the exhaust passage 21. That is to say, the exhaust gas generated by the combustion of the cylinder 11 is discharged through the exhaust passage 21, and a part of the exhaust gas in the exhaust passage 21 is delivered to the EGR passage 22, and is returned to the cylinder 11 through the EGR passage 22 for recycling. .

Since at least part of the exhaust passage 21 is embedded in the top water passage 123, that is, the top water passage 123 wraps the exhaust passage 21, and cooling liquid flows between the inner wall of the top water passage 123 and the outer wall of the exhaust passage 21, so that the exhaust The heat in the channel 21 can be absorbed by the coolant in the top water channel 123, which can increase the temperature rise of the coolant in the top water channel 123, and transfer the heat to the oil in the oil channel through the coolant, thereby increasing the oil in the oil channel 13 Temperature rise.

According to the engine system 100 of the embodiment of the present invention, by embedding at least a part of the exhaust duct 21 in the top water passage 123, the temperature rise of the coolant in the top water passage 123 is accelerated, and the temperature of the oil in the oil passage 13 is rapidly increased to avoid In the high-cold environment or low-temperature environment, the problem of slow temperature rise of the oil in the oil passage 13 occurs, thereby improving the lubricating performance of the oil and reducing the running resistance of the engine.

In some embodiments of the present invention, as shown in FIG. 3 in combination with FIG. 4, a plurality of first cooling fins 40 are provided between the exhaust duct 21 and the inner wall surface of the water jacket 12, and the first cooling fins 40 are located on the exhaust side. . In this way, the heat of the gas in the exhaust duct 21 can be quickly transferred to the water jacket 12 through the first radiating fin 40, and transferred to the oil duct 13 through the wall of the water jacket 12, so as to realize the rapid increase of the oil in the oil duct 13 temperature. Wherein, the number of the first radiating fins 40 can be two or more. For example, as shown in FIG. 3, the outer wall of the exhaust duct 21 is provided with four first radiating fins, of which two first radiating fins 40 are located in the row. On the upper side of the air duct 21, the other two first cooling fins 40 are located on the lower side of the air duct 21.

In other embodiments of the present invention, the EGR air passage 22 is coupled to the cylinder head 30 and arranged adjacent to the oil passage 13, and a second heat sink 50 is provided between the EGR air passage 22 and the inner wall surface of the water passage. In this way, the exhaust gas in the EGR air passage 22 can also exchange heat with the water jacket 12 and the oil passage 13, thereby further increasing the temperature rise rate of the oil in the oil passage 13. The number of the second heat sink 50 may be two or more. For example, as shown in FIG. 2 in conjunction with FIG. 6, three first heat sinks are provided on the lower side of the EGR duct 22.

In an alternative embodiment, the heat dissipation area of the second heat sink 50 gradually decreases from the exhaust side to the intake side. It is understandable that the temperature on the exhaust side is higher than the temperature on the intake side, and the area of the second radiating fin 50 is adapted to the temperature changes on the exhaust side and the intake side to prevent the gas on the intake side from absorbing the heat of the second radiating fin 50 in reverse. , So as to effectively ensure that the heat is effectively delivered to the oil passage 13 and improve the temperature rise efficiency of the oil in the oil passage 13.

Further optionally, as shown in FIG. 6, the EGR air passage 22 is a curved air passage. In this way, the heat dissipation area of the EGR duct 22 is further increased, and the heat exchange efficiency between the EGR duct 22 and the oil duct 13 is improved.

In other embodiments of the present invention, the EGR air passage 22 is arranged adjacent to the oil passage 13 and is separated from the top water passage 123 and the oil passage 13 by a third heat sink 70 extending in the horizontal direction. The third heat sink 70 is added in the horizontal direction to increase the heat exchange between the EGR exhaust gas and the coolant and oil.

In other embodiments of the present invention, as shown in FIG. 2, the bottom end of the intake side of the cylinder block 10 is provided with a water pump 60, and the water jacket 12 further includes a bottom water channel 121, the bottom water channel 121 and the outlet of the water pump 60 and the rising water channel 122 is connected, and a down channel 124 is also provided on the intake side. The down channel 124 is connected to the top water channel 123 and the inlet of the water pump 60 respectively.

In other words, the coolant flow direction is roughly as follows. At the bottom of the cylinder block 10, the coolant in the bottom channel 121 flows from the intake side to the exhaust side, and then the coolant flows from the bottom end to the top end of the exhaust side; in the cylinder head 30 At the top, the coolant flows from the exhaust side to the intake side, and then the coolant flows from the top to the bottom, so as to fully absorb the heat released by the cylinder block 10, the cylinder head 30 and the exhaust duct 21 through the water jacket 12 to cool the engine system At the same time, sufficient heat can be transferred to the oil in the oil passage 13 to improve the lubricity of the oil.

At the top of the cylinder head 30, the coolant flows from the exhaust side to the intake side, opposite to the flow direction of the exhaust gas. The exhaust passage 21 is completely wrapped by the water jacket 12. In this way, the coolant and the exhaust gas form a convection, which can further accelerate the water jacket. 12 and the exhaust duct 21 heat exchange efficiency.

Further optionally, as shown in FIGS. 1 to 3, the cylinder block 10 defines a plurality of cylinders 11 (for example, the four cylinders in FIG. 1), and each cylinder 11 is provided with a combined channel in the circumferential direction, Each of the combined channels includes a plurality of ascending channels 122, wherein the total flow area of the combined channel located upstream is smaller than the total flow area of the combined channel located downstream. By increasing the total flow area of the combined channel located downstream, the problems of reduced pressure drop and reduced flow can be avoided, thereby ensuring that the heat of each cylinder 11 can be effectively absorbed by the coolant.

Preferably, as shown in FIG. 5, the top water passage 123 includes an upstream section 1231, a midstream section 1232, and a downstream section (not shown in the figure) that are connected in sequence from the exhaust side to the intake side. The flow area is smaller than the flow areas of the upstream section 1231 and the downstream section. In this way, the flow rate of the coolant can be accelerated, and the heat transfer rate between the coolant and the exhaust gas can be accelerated.

According to the engine system of the embodiment of the present invention, by optimizing the design of the exhaust passage 21, the water jacket 12 and the EGR air passage 22, the heating rate of the coolant as a whole is increased, thereby increasing the heating rate of the oil in the oil passage 13. The test results show that in idling conditions, the time for the coolant temperature to rise from 0°C to 70°C is shortened from 37min to 33min; for idling conditions, the time for the coolant temperature to rise from -25°C to 60°C is shortened from 53min to 40min. This effectively solves the problem that the vehicle's engine oil temperature rises slowly in high-cold areas or low-temperature environments, which affects engine performance.

In addition, in terms of EGR strategy control, the closing temperature of the bypass valve was increased to 276°C. While ensuring that the exhaust gas reaches the standard after the cold start and the warm-up phase, the EGR exhaust gas temperature was further increased and the temperature increase rate in the cylinder was accelerated.

The vehicle according to the embodiment of the present invention includes the engine system 100 for the vehicle of the above-mentioned embodiment, because the engine system 100 according to the embodiment of the present invention solves the problem of slow oil temperature rise, large engine resistance, and temperature rise of the heating system in high-cold areas and low-temperature environments. Therefore, the vehicle according to the embodiment of the present invention has a long service life and a good driving experience.

In the present invention, unless otherwise clearly defined and defined, the "above" or "below" of the first feature of the second feature may include the first and second features in direct contact, or may include the first and second features Not in direct contact but through other features between them. Moreover, "above", "above" and "above" the second feature of the first feature include the first feature being directly above and obliquely above the second feature, or it simply means that the level of the first feature is higher than the second feature. The “below”, “below” and “below” of the first feature of the second feature include the first feature directly above and diagonally above the second feature, or it simply means that the level of the first feature is smaller than the second feature.

In the description of this specification, descriptions with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean specific features described in conjunction with the embodiment or example , Structure, materials or features are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above-mentioned terms does not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art will not depart from the principle and purpose of the present invention. Under the circumstances, changes, modifications, substitutions and modifications can be made to the above-mentioned embodiments within the scope of the present invention.

Claims

An engine system, the engine system for a vehicle, characterized in that the engine system includes:

A cylinder block assembly, the cylinder block assembly comprising: a cylinder block and a cylinder head, wherein the cylinder block defines a cylinder, the cylinder head is disposed on the top of the cylinder block and defines an oil passage, the cylinder block assembly One side is the intake side, and the other side is the exhaust side;

A water jacket, the water jacket comprising a rising water channel arranged on the exhaust side and extending in the up-down direction and a top water channel communicating with the rising water channel and extending from the exhaust side to the intake side;

An air passage part, the air passage part includes an exhaust passage and an EGR air passage, wherein the exhaust passage communicates with the exhaust port of the cylinder and the exhaust passage is at least partially embedded in the top water passage The EGR air passage communicates with the intake port of the cylinder and the exhaust passage.
The engine system according to claim 1, wherein a plurality of first cooling fins are provided between the exhaust duct and the inner wall surface of the water jacket, and the first cooling fins are located on the exhaust side .
The engine system of claim 1 or 2, wherein the EGR air passage is coupled to the cylinder head and arranged adjacent to the oil passage, and the EGR air passage is connected to the water jacket. A second heat sink is arranged between the inner wall surfaces.
The engine system of claim 3, wherein the heat dissipation area of the second heat sink gradually decreases from the exhaust side to the intake side.
The engine system according to claim 3, wherein the EGR air passage is a curved air passage.
The engine system according to claim 1, wherein the EGR air passage is arranged adjacent to the oil passage and is separated from the top water passage and the oil passage by a third radiating fin extending in a horizontal direction.
The engine system according to claim 1, wherein a water pump is provided at the bottom end of the intake side of the cylinder, and the water jacket further includes a bottom water channel which is connected to the outlet and the outlet of the water pump respectively. The ascending water channel is connected, the air intake side is also provided with a down water channel, and the down water channel is respectively connected with the top water channel and the inlet of the water pump.
The engine system according to claim 7, wherein the cylinder block defines a plurality of cylinders, each of the cylinders is provided with a combined channel in the circumferential direction, and each of the combined channels includes a plurality of ascending channels, wherein , The total flow area of the combined channel located upstream is smaller than the total flow area of the combined channel located downstream.
The engine system of claim 1, wherein the top water passage includes an upstream section, a midstream section, and a downstream section that are sequentially connected from the exhaust side to the intake side, and the flow area of the midstream section is smaller than that of the The flow area of the upstream section and the downstream section.
A vehicle, characterized by comprising the engine system according to any one of claims 1-9.