CN112576401B

CN112576401B - Double-deck cylinder head water jacket, cylinder and vehicle

Info

Publication number: CN112576401B
Application number: CN201910943567.5A
Authority: CN
Inventors: 王家武; 何龙龙; 陈良
Original assignee: Guangzhou Automobile Group Co Ltd
Current assignee: Guangzhou Automobile Group Co Ltd
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2022-08-26
Anticipated expiration: 2039-09-30
Also published as: CN112576401A

Abstract

The invention is suitable for the field of vehicles, and discloses a double-layer cylinder cover water jacket, a cylinder and a vehicle, which comprises an upper layer water jacket and a lower layer water jacket, wherein the upper layer water jacket and the lower layer water jacket are superposed up and down, the upper layer water jacket is provided with an upper water cavity for containing cooling water and a water outlet for discharging the cooling water out of the upper water cavity, the lower layer water jacket is provided with a lower water cavity for containing the cooling water and a water inlet for introducing the cooling water into the lower water cavity, the lower water cavity is provided with a combustion chamber area corresponding to the upper part of a combustion chamber of the cylinder, the combustion chamber area comprises an exhaust valve area, a communication hole for communicating the upper water cavity with the lower water cavity is arranged between the upper layer water jacket and the lower layer water jacket, and the communication hole is positioned close to the exhaust valve area. The invention further provides the cylinder and the vehicle. According to the double-layer cylinder cover water jacket, the cylinder and the vehicle, cooling water can be guided to a high-heat area of the cylinder cover, so that the generation of a water flow dead zone is avoided, and the cooling effect of a key high-heat part meets the requirement.

Description

Double-deck cylinder head water jacket, cylinder and vehicle

Technical Field

The invention belongs to the field of vehicles, and particularly relates to a double-layer cylinder cover water jacket, a cylinder and a vehicle.

Background

With the continuous development of the related technologies of the engine, the power density of the engine is continuously improved, and the requirements on parts are more and more strict. The cylinder head is one of the most critical parts of the engine, and the reliability of the cylinder head is closely related to the casting process and the cooling effect. The cylinder head has a water jacket to cool the heat generated in the combustion chamber and other mechanically operated components of the engine to prevent overheating of the engine and to maintain the engine at a suitable temperature for optimum thermal efficiency. The double-layer water jacket can well meet the requirement that the cooling effect is preferentially enhanced in a high-temperature area of the bottom surface of the cylinder cover, but the process for casting the cylinder cover with the double-layer water jacket becomes more complicated. The connecting position of the upper water jacket and the lower water jacket easily generates burrs in the casting process, and a high-heat area of the combustion chamber easily generates a water flow dead zone, so that the cooling requirement is not met, the cylinder cover is cracked, and even the whole engine is scrapped.

Disclosure of Invention

The invention aims to solve at least one of the technical problems and provides a double-layer cylinder cover water jacket, a cylinder and a vehicle, which can solve the problem of burrs at the joint of an upper water jacket and a lower water jacket in the casting process and guide cooling water to a high-heat area, so that the cooling effect of a key high-heat part meets the requirement.

The technical scheme of the invention is as follows: a double-layer cylinder head water jacket comprises an upper layer water jacket and a lower layer water jacket, wherein the upper layer water jacket and the lower layer water jacket are superposed up and down, the upper layer water jacket is provided with an upper water cavity for containing cooling water and a water outlet for discharging the cooling water out of the upper water cavity, the lower layer water jacket is provided with a lower water cavity for containing the cooling water and a water inlet for introducing the cooling water into the lower water cavity, the lower water cavity is provided with a combustion chamber area corresponding to the upper part of a combustion chamber of a cylinder, the combustion chamber area comprises an exhaust valve area, a communication hole for communicating the upper water cavity with the lower water cavity is arranged between the upper layer water jacket and the lower layer water jacket, and the communication hole is positioned close to the exhaust valve area.

Optionally, the combustion chamber region comprises two adjacent exhaust valve regions and two adjacent intake valve regions, the two exhaust valve regions and the two intake valve regions being arranged one above the other;

the combustion chamber region comprises an intake nose bridge region between adjacent intake valve regions, an exhaust nose bridge region between adjacent exhaust valve regions, and an intake and exhaust nose bridge region between adjacent intake valves and exhaust valves;

the lower water jacket is provided with a drainage structure, and the drainage structure is used for draining cooling water so that the cooling water flows through the air inlet and exhaust nose bridge area.

Optionally, the combustion chamber area has a plurality, the flow guiding structure is provided with a plurality, and one combustion chamber area is arranged between adjacent flow guiding structures.

Optionally, the drainage structure is arranged at the top of the lower water jacket, two sides of the drainage structure are close to the air intake and exhaust nose bridge areas corresponding to two adjacent combustion chamber areas, and the drainage structure is a pit structure with a relatively deep center and a shallower depth of the air intake and exhaust nose bridge areas with two sides closer to the two sides;

or the drainage structure is a raised structure arranged in the lower water cavity, and the raised structure is a projection with relatively high central height and lower height, wherein the two sides of the projection are closer to the two sides of the air inlet and exhaust nose bridge area.

Optionally, the cross section of the pit structure is V-shaped or trapezoidal or semicircular.

Alternatively, the communication hole is provided at the exhaust valve bridge region or/and the intake valve bridge region.

Alternatively, a plurality of the communication holes are provided, and two exhaust valve regions or two intake valve regions are provided between adjacent two of the communication holes.

Optionally, the water inlet is arranged on one side of the lower water jacket, and the water outlet is arranged on one side of the upper water jacket away from the water inlet.

The invention also provides an air cylinder, which comprises a cylinder cover and a cylinder body, wherein the cylinder cover is connected with the double-layer cylinder cover water jacket, the bottom surface of the cylinder cover is provided with a cylinder cover bottom surface hole, and the position of the cylinder cover bottom surface hole corresponds to the position of the communicating hole.

The invention also provides a vehicle which is provided with the air cylinder.

According to the double-layer cylinder cover water jacket, the cylinder and the vehicle, the positions of the upper and lower water jacket communicating holes are reasonably arranged, the cooling of key high-heat parts is better, and the bottom hole of the cylinder cover is arranged corresponding to the water jacket communicating hole, so that the communicating hole can be observed and burrs at the position of the communicating hole can be removed after the cylinder cover is cast, the casting yield of the cylinder cover is improved, and the production efficiency is further improved. The drainage structure that sets up in the high fever region can be with cooling water drainage to high fever position to cooling high fever position, drainage structure can be pit structure or protruding structure, and the lower water cavity restriction of drainage structure position is the wide shape of centre both sides, makes the preferential inflow of cooling water and exhausts nose bridge district that is located both sides, reaches the effect of drainage cooling water, thereby cools off the inflow and exhausts nose bridge district. The water inlet and the water outlet are respectively arranged on different sides to meet the cooling uniformity of the cylinder cover.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic perspective view of a double-deck cylinder head water jacket provided in an embodiment of the present invention;

FIG. 2 is a top view of a lower deck water jacket of a double deck cylinder head water jacket provided by an embodiment of the present invention;

FIG. 3 is an enlarged view of a portion A of FIG. 1;

fig. 4 is a bottom view of a cylinder head in a cylinder according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It should be noted that the terms "disposed" and "connected" should be interpreted broadly, and may be, for example, directly disposed or connected, or indirectly disposed or connected through intervening elements or intervening structures.

In addition, in the embodiments of the present invention, if there are terms of orientation or positional relationship indicated by "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., it is only for convenience of describing the present invention and simplifying the description, but not for indicating or implying that the structure, feature, device or element referred to must have a specific orientation or positional relationship, nor must be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

The various features and embodiments described in the embodiments may be combined in any suitable manner, for example, different embodiments may be formed by combining different features/embodiments, and in order to avoid unnecessary repetition, various possible combinations of features/embodiments in the present invention will not be described in detail.

As shown in fig. 1 and 2, a double-deck cylinder head water jacket according to an embodiment of the present invention includes an upper-deck water jacket 1 and a lower-deck water jacket 2, the upper-deck water jacket 1 and the lower-deck water jacket 2 being stacked one on top of the other, the upper-deck water jacket 1 having an upper water chamber (not shown) for accommodating cooling water and a water outlet 11 for discharging the cooling water out of the upper water chamber, the lower-deck water jacket 2 having a lower water chamber (not shown) for accommodating cooling water and a water inlet 22 for introducing the cooling water into the lower water chamber, the lower water chamber having a combustion chamber region 21 corresponding to an upper portion of a combustion chamber 43 of a cylinder, the combustion chamber region 21 corresponding to a region above the combustion chamber 43 of the cylinder (when the double-deck cylinder head water jacket is mounted to the cylinder), the combustion chamber region 21 including an exhaust valve region 212, the exhaust valve region 212 corresponding to a region above an exhaust valve of the cylinder, a communication hole 3 for communicating the upper water chamber and the lower water chamber is arranged between the upper water jacket 1 and the lower water jacket 2, and the communication hole 3 is located near the exhaust valve region 212, that is, the communication hole 3 is located in a region above an exhaust valve of a cylinder.

By such a design, the cooling water flows into the lower water chamber from the water inlet 22 at the lower water jacket 2, the cooling water in the lower water chamber flows into the upper water chamber through the communication hole 3 between the upper water jacket 2 and the lower water jacket 2, and then flows out from the water outlet 11 of the upper water jacket 1, the position of the communication hole 3 is reasonably arranged, the communication hole is arranged near the exhaust valve area 212, the exhaust valve area 212 is a high-heat area, the communication hole 3 is arranged in the area, so that the cooling water can sufficiently cool the area and flow into the upper water chamber, a cylinder head floor hole 44 may be provided at the cylinder head 4 below the communication hole 3, the communication hole 3 is provided in a region where the communication hole 3 can be viewed through the cylinder head floor hole 44 of the cylinder head 4, after the cylinder cover 4 is cast, the position of the communicating hole 3 can be observed whether burrs occur or not through the communicating hole 3 of the cylinder cover 4, and the burrs can be conveniently removed if the burrs exist.

Specifically, as shown in fig. 2 and 4, as an alternative embodiment of the present invention, the combustion chamber region 21 includes two adjacent exhaust valve regions 212 and two adjacent intake valve regions 211, and the two exhaust valve regions 212 and the two intake valve regions 211 are disposed above and below each other, that is, the two adjacent exhaust valve regions 212 and the two adjacent intake valve regions 211 are disposed in the combustion chamber region 21 in a matrix of two rows and two columns.

The combustion chamber region 21 includes an intake valve bridge region 214, an exhaust valve bridge region 215, and an intake and exhaust bridge region 216. When the intake valve bridge region 214 is positioned between the adjacent intake valve regions 211, the exhaust valve bridge region 215 is positioned between the adjacent exhaust valve regions 212, and the intake and exhaust valve bridge region 216 is positioned between the adjacent intake valves and the adjacent exhaust valves, the combustion chamber region 21 can further comprise a spark plug region 213, and the spark plug region 213 is positioned in the middle of the combustion chamber region 21, namely in the middle of the intake and exhaust valve bridge region 216 when applied to a gasoline internal combustion engine;

the lower water jacket 2 is provided with a flow guiding structure 23, and the flow guiding structure 23 is used for guiding cooling water so that the cooling water can more fully flow through the air inlet and outlet nose bridge area 216.

Through the design, the intake valve area 211 and the exhaust valve area 212 are respectively used above the intake passage 42 and the exhaust passage 41 corresponding to the cylinder, the intake valve area 211 and the exhaust valve area 212 can be arranged according to the condition of the actual cylinder, generally, each combustion chamber 43 corresponds to 1 to 2 exhaust valve areas 212 and intake valve areas 211, preferably 2 in the embodiment, the bridge areas corresponding to the areas are all heating areas of the cylinder cover, in the actual situation, because the range of the intake and exhaust bridge area 216 is large, the insufficient water flow condition is easy to occur in the area, so that the cooling water forms a water flow dead area in the intake and exhaust bridge area 216 in the flowing process, thereby not meeting the cooling requirement, causing the cylinder cover to crack, even the engine to be scrapped, the invention is provided with the flow guide structure 23 in the area, the cooling water can be guided to the intake and exhaust bridge area 216, and the water flow dead area is avoided to form in the area, allowing the region to cool sufficiently.

Specifically, as shown in fig. 2, as an alternative embodiment of the present invention, there are a plurality of combustion chamber regions 21, a plurality of flow guide structures 23 are provided, and one combustion chamber region 21 is provided between adjacent flow guide structures 23.

In a specific application, there are a plurality of combustion chambers 43 of a common engine cylinder, and there are a plurality of corresponding flow-guiding structures 23 to meet the cooling requirement, in this embodiment, there are preferably 4 combustion chambers 43, and similarly, there are 4 combustion chamber regions 21, and there are 5 flow-guiding structures 23, that is, it meets the requirement that there is one combustion chamber region 21 between adjacent flow-guiding structures 23, and such a design can meet the cooling requirement of the intake and exhaust nose bridge region 216.

Specifically, as an alternative embodiment of the present invention, the drainage structure 23 is a convex structure disposed in the lower water cavity, the convex structure is a convex structure with a relatively high central height and a lower height of the air intake and exhaust nose areas 216 at two sides closer to the two sides, in a specific application, the lower water jacket 2 is generally a thin shell structure, as shown in fig. 1 to 3, the drainage structure 23 can also be understood as an air intake and exhaust nose area 216 disposed at the top of the lower water jacket 2 and two sides closer to the two adjacent combustion chamber areas 21, and the drainage structure 23 is a concave structure with a relatively deep central height and a shallower depth of the air intake and exhaust nose areas 216 at two sides closer to the two sides; by such a design, as the lower water jacket 2 is closer to the cylinder, the amount of heat received is more than that received by the upper water jacket 1, therefore, the flow guiding structure 23 is arranged on the lower water jacket 2 and is close to the intake and exhaust nose bridge regions 216 corresponding to the two adjacent combustion chamber regions 21, the flow guiding structure 23 is a pit structure which is arranged at the top of the lower water jacket 2 and has a relatively deep center and a shallower depth at the two sides closer to the intake and exhaust nose bridge regions 216 at the two sides, the flow guiding structure 23 can also be understood as a convex structure which is arranged in the lower water cavity and has a relatively high center and a lower height at the two sides closer to the intake and exhaust nose bridge regions 216 at the two sides, no matter the pit structure or the convex structure, the purpose is to compress the water flow space in the lower water cavity at the center of the flow guiding structure 23, and the water flow spaces at the two sides gradually widen outwards when the cooling water flows through the position, the cooling water can flow to both sides preferentially, and the discharge of both sides is more, has avoided producing rivers blind spot to reach the effect of the inlet and exhaust nose bridge district 216 of cooling drainage structure 23 both sides, simultaneously, according to actual conditions, drainage structure 23 can also be add to upper water jacket 1, in order to strengthen the cooling effect.

Specifically, as shown in fig. 3, as an alternative embodiment of the present invention, the cross section of the pit structure may be V-shaped or trapezoidal or semicircular.

In a specific application, the cross section of the pit structure is not limited to a V shape, a trapezoid shape or a semicircular shape, the cross section can be the pit structure with the cross section becoming shallower from the middle to the two sides, and similarly, the convex structure can be the pit structure with the cross section becoming shallower from the middle to the two sides.

Specifically, as shown in fig. 2, as an alternative embodiment of the present invention, the communication hole 3 is provided at the exhaust valve bridge region 215 or/and at the intake valve bridge region 214.

In the concrete application, the intercommunicating pore 3 is mainly used for connecting the upper water cavity and the lower water cavity, the cooling water in the lower water cavity is introduced into the upper water cavity, the water flow speed at the intercommunicating pore 3 is high, the water flow is large, the intercommunicating pore 3 is arranged at the position of the exhaust valve nose bridge area 215 or/and the position of the intake valve nose bridge area 214, and the cooling effect at the position can be improved.

Specifically, as shown in fig. 2, as an alternative embodiment of the present invention, a plurality of the communication holes 3 are provided, and two exhaust valve regions 212 or two intake valve regions 211 are provided between two adjacent communication holes 3.

In the specific application, in order to fully introduce the cooling water in the lower water cavity into the upper water cavity, the lower water jacket 2 is provided with the plurality of communicating holes 3, and meanwhile, because the space of the water jacket is limited, two air inlet and outlet nose bridge areas 216 or exhaust valve areas 212 are arranged between two adjacent communicating holes 3.

Specifically, as shown in fig. 1 to 3, as an alternative embodiment of the present invention, the water inlet 22 is disposed on one side of the lower water jacket 2, and the water outlet 11 is disposed on one side of the upper water jacket 1 away from the water inlet 22.

Through the design, the water inlets 22 and the water outlets 11 arranged on different sides can meet the cooling uniformity of all positions of the cylinder cover 4, and meanwhile, the number of the water inlets 22 or the water outlets 11 can be increased according to actual conditions, so that the flowing efficiency of cooling water is improved, and the cooling effect is improved.

The invention also provides a cylinder, as shown in fig. 4, comprising a cylinder cover 4 and a cylinder body (not shown in the figure), wherein the cylinder cover 4 is connected with the double-layer cylinder cover water jacket, a cylinder cover bottom surface hole 44 is arranged on the bottom surface of the cylinder cover 4, and the cylinder cover bottom surface hole 44 corresponds to the communication hole 3.

Through the design, whether burrs are generated in the communication holes 3 of the upper water jacket 2 and the lower water jacket 2 in the casting process is observed through the cylinder cover bottom surface holes 44 arranged on the bottom surface of the cylinder cover 4, if the burrs are generated, the burrs can be removed through the cylinder cover bottom surface holes 44, meanwhile, the water jacket feet of the sand core can be used as supporting feet in the casting process, so that the fixation of the water jacket sand core is ensured, and the casting yield is increased.

The invention further provides a vehicle, and the air cylinder is adopted. The cylinder adopts the water jacket to ensure the cooling effect, and is beneficial to ensuring the stability and the reliability of the vehicle.

According to the double-layer cylinder cover water jacket, the cylinder and the vehicle provided by the embodiment of the invention, the positions of the communication holes 3 of the upper and lower water jackets 2 are reasonably arranged, so that the communication holes 3 can be observed and burrs at the positions of the communication holes 3 can be removed after the cylinder cover 4 is cast, the casting yield of the cylinder cover 4 is improved, and further the production efficiency is improved. The setting can be with cooling water drainage to high fever position at regional drainage structure 23 of high fever to the cooling high fever position, drainage structure 23 can be pit structure or protruding structure, and the lower water cavity restriction of drainage structure 23 position is the wide shape of centre both sides, makes the cooling water preferential flow through the admission and exhaust nose bridge district 216 that is located both sides, reaches the effect of drainage cooling water, thereby the cooling admission and exhaust nose bridge district 216. The water inlet 22 and the water outlet 11 are respectively arranged on different sides to satisfy the uniformity of cooling of the cylinder head 4.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents or improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. The cylinder is characterized in that the cylinder cover is connected with a double-layer cylinder cover water jacket; the double-layer cylinder cover water jacket comprises an upper-layer water jacket and a lower-layer water jacket, the upper-layer water jacket and the lower-layer water jacket are superposed up and down, the upper-layer water jacket is provided with an upper water cavity for containing cooling water and a water outlet for discharging the cooling water out of the upper water cavity, the lower-layer water jacket is provided with a lower water cavity for containing the cooling water and a water inlet for introducing the cooling water into the lower water cavity, the lower water cavity is provided with a combustion chamber area corresponding to the upper part of a combustion chamber of a cylinder, and the combustion chamber area comprises an exhaust valve area, and the double-layer cylinder cover water jacket is characterized in that a communication hole for communicating the upper water cavity with the lower water cavity is arranged between the upper-layer water jacket and the lower-layer water jacket and is positioned close to the exhaust valve area; the bottom surface of the cylinder cover is provided with a cylinder cover bottom surface hole, and the position of the cylinder cover bottom surface hole corresponds to that of the communication hole;

the combustion chamber region comprises two adjacent exhaust valve regions and two adjacent intake valve regions, and the two exhaust valve regions and the two intake valve regions are arranged up and down;

the combustion chamber region comprises an intake nose bridge region positioned between adjacent intake valve regions, an exhaust nose bridge region positioned between adjacent exhaust valve regions, and an intake and exhaust nose bridge region positioned between adjacent intake valves and adjacent exhaust valves;

the lower-layer water jacket is provided with a drainage structure, and the drainage structure is used for draining cooling water so that the cooling water flows through the air inlet and exhaust nose bridge area;

the number of the combustion chamber areas is multiple, the number of the flow guide structures is multiple, and one combustion chamber area is arranged between every two adjacent flow guide structures;

the drainage structure is arranged at the top of the lower water jacket, two sides of the drainage structure are close to the air intake and exhaust nose bridge areas corresponding to two adjacent combustion chamber areas, and the drainage structure is a pit structure with a relatively deep center and shallower depth of the air intake and exhaust nose bridge areas with two sides closer to the two sides;

2. The cylinder of claim 1, wherein the dimple arrangement is V-shaped or trapezoidal or semi-circular in cross-section.

3. The cylinder according to claim 1, characterized in that the communication hole is provided at the exhaust valve bridge region or/and the intake valve bridge region.

4. The cylinder according to claim 3, characterized in that the communication hole is provided in plurality with two of the exhaust valve regions or two of the intake valve regions between adjacent two of the communication holes.

5. The cylinder of claim 1, wherein said water inlet is disposed on a side of said lower water jacket and said water outlet is disposed on a side of said upper water jacket remote from said water inlet.

6. A vehicle, characterized in that it has a cylinder according to any one of claims 1 to 5.