CN220353953U - Cylinder head cooling water jacket, cylinder head, engine and vehicle - Google Patents

Abstract

The utility model relates to a cylinder head cooling water jacket, a cylinder head, an engine and a vehicle, wherein the cylinder head cooling water jacket comprises a cylinder head upper water jacket and a cylinder head lower water jacket which are communicated with each other, the cylinder head upper water jacket and the cylinder head lower water jacket are longitudinal flow type cooling water jackets, a plurality of combustion chamber cooling areas matched with a cylinder block of the engine are arranged on the cylinder head upper water jacket, a nose bridge area of the combustion chamber cooling areas is provided with cooling water holes, one end of each cooling water hole is communicated with the cylinder head upper water jacket, and the other end of each cooling water hole is communicated with the cylinder body cooling water jacket so as to synchronously cool each nose bridge area when the engine runs. When the engine runs, the cooling liquid in the cooling water jacket of the cylinder body can cool each nose bridge area simultaneously, so that the nose bridge areas of the cooling areas of the combustion chambers of the cylinder cover are basically the same in temperature, and the temperature difference of each nose bridge area of the cylinder cover is reduced.

Description

Cylinder head cooling water jacket, cylinder head, engine and vehicle

Technical Field

The utility model relates to a cylinder head water jacket structure, in particular to a cylinder head cooling water jacket, a cylinder head, an engine and a vehicle.

Background

The cylinder cover of the engine is used as a core part of the engine, and mainly serves to seal the upper part of the cylinder, form a combustion chamber together with the piston and the cylinder, bear the gas pressure in the cylinder, generally comprise an air passage and provide mounting positions for parts such as a valve, and the like, so that the normal operation of the engine is ensured. When the engine is operated, the parts contacting with high-temperature combustion gas are heated strongly, if proper cooling is not performed, the engine is overheated, the air charging coefficient is reduced, the combustion is abnormal (deflagration, preignition and the like), engine oil is deteriorated and burnt, friction and abrasion of the parts are increased, and the dynamic property, economy, reliability and durability of the engine are comprehensively deteriorated. Therefore, the good cooling structure can ensure that the engine works in the most suitable temperature state, and the cooling structure design of the cylinder cover is also extremely important.

The cooling water jacket of the engine is generally composed of a cylinder head cooling water jacket, a cylinder pad cooling water hole and a cylinder body cooling water jacket, and forms an engine cooling system together with parts such as an engine water pump, a radiator and the like. The cylinder head cooling water jacket is an important structure for the cylinder head and the engine, and the cylinder head cooling water jacket is used for cooling the combustion chamber and the exhaust passage of the cylinder head, so that the cylinder head and valve mechanism parts assembled on the cylinder head can work efficiently at proper temperature under all working conditions of the engine.

The integrated exhaust manifold technology of the engine has the advantages of low cost, low emission and low oil consumption and is widely applied. The existing integrated exhaust manifold cylinder cover needs to divide the cylinder cover water jacket structure into an upper part and a lower part because of the casting process requirement of a cylinder cover blank. The cylinder head water jacket is divided into a cylinder head upper water jacket and a cylinder head lower water jacket by adopting an exhaust passage outlet center plane parallel to the bottom surface of the cylinder head. The existing cylinder cover water jacket structure takes the cylinder cover lower water jacket as a main body structure to cover important cooling areas such as a cylinder cover combustion chamber, the lower part of an exhaust passage and the like, and the coverage area is large. For an engine adopting a longitudinal flow cooling water jacket, the cooling effect of a bridge zone between two exhaust valves of a cooling zone of a combustion chamber of a cylinder head is poor, and the temperature difference of the bridge zone of each combustion chamber cooling zone of the cylinder head is large.

Disclosure of Invention

The utility model aims to provide a cooling water jacket of a cylinder cover, which is used for solving the problem that the temperature difference of nose bridge areas of cooling areas of combustion chambers of the cylinder cover in the prior art is large; the second aim is to provide a cylinder head; a third object is to provide an engine; a fourth object is to provide a vehicle.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

the cylinder cover cooling water jacket comprises a cylinder cover upper water jacket and a cylinder cover lower water jacket which are communicated with each other, wherein the cylinder cover upper water jacket and the cylinder cover lower water jacket are longitudinal flow type cooling water jackets, a plurality of combustion chamber cooling areas matched with a cylinder body of an engine are arranged on the cylinder cover upper water jacket, a nose bridge area of the combustion chamber cooling areas is provided with cooling water holes, one end of each cooling water hole is communicated with the cylinder cover upper water jacket, and the other end of each cooling water hole is communicated with the cylinder body cooling water jacket so as to synchronously cool each nose bridge area when the engine runs.

According to the technical means, as the cooling water holes are formed in the nose bridge area, one end of each cooling water hole is communicated with the upper water jacket of the cylinder cover, the other end of each cooling water hole is communicated with the cylinder body cooling water jacket, and cooling liquid in the cylinder body cooling water jacket can cool each nose bridge area simultaneously when the engine runs, so that the temperature of the nose bridge areas of the cooling areas of the combustion chambers of the cylinder cover is basically the same, and the temperature difference of the nose bridge areas of the cylinder cover is reduced.

Further, a cooling liquid water inlet is arranged at the front end of the upper water jacket of the cylinder cover, and a cooling liquid water outlet is arranged at the rear end of the upper water jacket of the cylinder cover.

According to the technical means, the cooling liquid enters the cylinder head cooling water jacket from the cooling liquid water inlet, flows out from the cooling liquid water outlet, enters the engine cooling system for circulation, and can quickly burn to generate heat.

Further, the cylinder head lower water jacket is communicated with the cylinder head upper water jacket through a plurality of water jacket communication water holes arranged on the exhaust side of the bottom surface of the cylinder head.

According to the technical means, the lower water jacket of the cylinder cover can omit a cooling liquid inlet and a cooling liquid outlet.

Further, the cylinder cover lower water jacket is communicated with the cylinder cover upper water jacket through a plurality of water jacket sand core seat plugging holes arranged on the exhaust side of the bottom surface of the cylinder cover.

According to the technical means, the lower water jacket of the cylinder cover can omit a cooling liquid inlet and a cooling liquid outlet.

Further, the cooling water holes are of a machine-added structure.

Further, an annular cooling passage surrounding the outlet of the exhaust passage is arranged on the exhaust side of the cylinder head lower water jacket.

According to the technical means, the number of the cylinder cover water jacket modules is reduced, and the production difficulty of cylinder cover blanks is reduced.

The cylinder cover comprises a cylinder cover body, wherein the cylinder cover body is internally integrated with the cylinder cover cooling water jacket.

Further, a thermostat mounting seat is arranged at the rear end of the cylinder cover body, and an overflow pipe mounting seat is arranged at the exhaust side of the thermostat mounting seat.

According to the above technical means, the cylinder head cooling water jacket can be connected to the cooling system of the engine.

Furthermore, the temperature regulator mounting seat and the air overflow pipe mounting seat are both mounting flanges.

According to the technical means, the cylinder head cooling water jacket is conveniently connected with a cooling system of the engine.

An engine is provided with the cylinder head.

A vehicle is provided with the engine.

The utility model has the beneficial effects that:

according to the utility model, the cooling water holes are formed in the nose bridge area, one end of each cooling water hole is communicated with the water jacket on the cylinder cover, the other end of each cooling water hole is communicated with the cylinder body cooling water jacket, and when the engine runs, cooling liquid in the cylinder body cooling water jacket can cool each nose bridge area simultaneously, so that the temperature of the nose bridge areas of the cooling areas of the combustion chambers of the cylinder cover is basically the same, and the temperature difference of each nose bridge area of the cylinder cover is reduced.

Drawings

FIG. 1 is one of schematic structural views of a cylinder head cooling jacket in which a dashed arrow indicates a coolant flow direction in an embodiment of the utility model;

FIG. 2 is a schematic view of a water jacket on a cylinder head in an embodiment of the utility model, wherein dashed arrows indicate coolant flow direction;

FIG. 3 is a schematic view of the structure of a cylinder head lower water jacket in which a dashed arrow indicates a coolant flow direction in an embodiment of the utility model;

FIG. 4 is one of schematic perspective views of a cylinder head cooling jacket in which a dashed arrow indicates a coolant flow direction in an embodiment of the utility model;

FIG. 5 is a schematic perspective view of a cylinder head according to an embodiment of the present utility model;

FIG. 6 is a second perspective view of a cylinder head cooling jacket in accordance with an embodiment of the present utility model, wherein the dashed arrows indicate the coolant flow direction;

fig. 7 is a second schematic view of a cylinder head cooling jacket in accordance with an embodiment of the present utility model, wherein the dashed arrows indicate the direction of coolant flow.

Wherein, the 10-cylinder cover is provided with a water jacket; 11-a combustor cooling zone; 12-spark plug cooling area; 13-intake side valve guide cooling area, 14-exhaust side valve guide cooling area; 15-a cooling area above the exhaust passage; 16-a cooling liquid inlet; 17-a cooling liquid outlet; 20-cylinder cover lower water jacket; 21-a cooling area under the exhaust passage; 22-annular cooling channels; 30-cylinder head; 31-the water jacket is communicated with the water hole; 32-plugging holes by a sand core seat of the water jacket sand core; 33-cooling water holes, 34-a thermostat mounting seat and 35-an overflow pipe mounting seat; 36-a first exhaust duct outlet; 37-the outlet of the second exhaust passage.

Detailed Description

Further advantages and effects of the present utility model will become readily apparent to those skilled in the art from the disclosure herein, by referring to the accompanying drawings and the preferred embodiments. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model. It should be understood that the preferred embodiments are presented by way of illustration only and not by way of limitation.

It should be noted that the illustrations provided in the following embodiments merely illustrate the basic concept of the present utility model by way of illustration, and only the components related to the present utility model are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complicated.

The embodiment proposes a cylinder head cooling water jacket, as shown in fig. 1-7, comprising a cylinder head upper water jacket 10 and a cylinder head lower water jacket 20, wherein the cylinder head upper water jacket 10 and the cylinder head lower water jacket 20 are communicated with each other, the cylinder head upper water jacket 10 and the cylinder head lower water jacket 20 are longitudinal flow type cooling water jackets, a plurality of combustion chamber cooling areas 11 matched with a cylinder block of an engine are arranged on the cylinder head upper water jacket 10, a nose bridge area of the combustion chamber cooling areas 11 is provided with cooling water holes 33, one end of each cooling water hole 33 is communicated with the cylinder head upper water jacket 10, and the other end is communicated with the cylinder body cooling water jacket so as to synchronously cool each nose bridge area when the engine runs.

Generally, for an engine, the end to which the flywheel is mounted is the rear end, i.e., the power take-off end, and the opposite end is the front end. The cylinder head serves as a core component of the engine, and therefore, the orientation of the front and rear ends of the cylinder head substantially coincides with the orientation of the front and rear ends of the engine.

As shown in fig. 2, the cylinder head upper water jacket 10 is a main structure, and a plurality of combustion chamber cooling regions 11 are arranged on the cylinder head upper water jacket 10, the combustion chamber cooling regions 11 corresponding to combustion chambers of a cylinder block of an engine and being engaged for cooling. In the embodiment shown in fig. 2, the engine is a four-cylinder engine, and for convenience of description, the four-cylinder engine is mainly taken as an example for description, and it is understood that, for other types of engines, the cylinder head cooling water jacket of the present utility model may be applied through simple modification on the basis of the technical concept of the present utility model, which also falls within the protection scope of the present utility model.

Specifically, the combustion chamber cooling region 11 includes a spark plug cooling region 12, an intake side valve guide cooling region 13, and an exhaust side valve guide cooling region 14, and a nose bridge region is formed between the spark plug cooling region 12, the intake side valve guide cooling region 13, and the exhaust side valve guide cooling region 14. The cooling water holes are formed in the nose bridge areas, one ends of the cooling water holes are communicated with the upper water jacket of the cylinder cover, the other ends of the cooling water holes are communicated with the cylinder body cooling water jacket, and when the engine runs, cooling liquid in the cylinder body cooling water jacket can cool all nose bridge areas simultaneously, so that the temperature of the nose bridge areas of all combustion chamber cooling areas of the cylinder cover is basically the same, and the temperature difference of all nose bridge areas of the cylinder cover is reduced.

In the prior art, a cooling channel is arranged in a nose bridge area, and the cooling channel is cast by a cylinder cover, so that the difficulty of a cylinder cover blank casting production process is increased. As shown in FIG. 4, the cooling channel of the nose bridge area of the utility model adopts a machining mode to process cooling water holes 33 in the nose bridge area, so that the casting production process difficulty of the blank of the cylinder cover can be reduced.

In some embodiments, as shown in fig. 1, a coolant water inlet 16 is disposed at a front end of the cylinder head upper water jacket 10, and a coolant water outlet 17 is disposed at a rear end of the cylinder head upper water jacket 10. As shown in fig. 7, the cylinder head lower water jacket 20 communicates with the cylinder head upper water jacket 10 through a plurality of water jacket communication water holes 31 arranged on the exhaust side of the cylinder head bottom surface. As shown in fig. 6, the cylinder head lower water jacket 20 is communicated with the cylinder head upper water jacket 10 through a plurality of water jacket sand core seat plugging holes 32 arranged on the exhaust side of the bottom surface of the cylinder head, after casting of the cylinder head blank is completed in the casting production process of the cylinder head blank, water jacket sand core positioning holes are used for discharging casting sand from the blank to the outside, water jacket sand core positioning holes capable of being communicated are formed between the cylinder head upper water jacket 10 and the cylinder head lower water jacket 20, and the water jacket sand core positioning holes are plugged to form the water jacket sand core seat plugging holes 32, so that the cylinder head upper water jacket 10 is communicated with the cylinder head lower water jacket 20 to form a whole. The cooling liquid enters the cylinder head upper water jacket 10 from the cooling liquid water inlet 16, one part of the cooling liquid flows to the cooling liquid water outlet 17 along the longitudinal cooling passage of the cylinder head upper water jacket 10, the other part of the cooling liquid flows into the cylinder head lower water jacket 20 through the water jacket communicating water hole 31 and the water jacket sand core seat plugging hole 32, flows along the longitudinal cooling passage of the cylinder head lower water jacket 20, and then flows to the cooling liquid water outlet 17 through the water jacket communicating water hole 31 communicated with the cooling liquid water outlet 17. The heat generated by combustion can be quickly taken away, so that the engine can be at a proper temperature, and the reliability of the cylinder cover is improved.

An exhaust manifold is accommodated in a space between the cylinder head upper water jacket 10 and the cylinder head lower water jacket 20 as an exhaust passage. For example, the exhaust passages of 1 cylinder and 4 cylinders of a four-cylinder engine merge at the outlet into one exhaust passage, and the exhaust passages of 2 cylinder and 3 cylinders of a four-cylinder engine merge at the outlet into one exhaust passage, which in the embodiment shown in fig. 5 communicate with a first exhaust passage outlet 36 and a second exhaust passage outlet 37, respectively.

In the prior art, a cooling channel is added between two exhaust passage outlets, and firstly, the newly added exhaust passage cooling channel can cause the increase of the difficulty of the blank casting production process of the cylinder cover; and secondly, the number of water jacket sand core positioning holes required to be plugged on the exhaust side of the cylinder cover is increased, so that the cost of the engine is increased, and the risk of plugging leakage is high. In this regard, as shown in fig. 1 and 3, the annular cooling channel 22 is arranged on the exhaust side of the cylinder head lower water jacket 20, the annular cooling channel 22 is in an annular structure, surrounds the exhaust channel outlets, specifically, surrounds the first exhaust channel outlet 36 and the second exhaust channel outlet 37, the annular cooling channel 22 is communicated with the cooling channel in the cylinder head lower water jacket 20, and as shown in fig. 5, the first exhaust channel outlet 36 and the second exhaust channel outlet 37 belong to the area with the highest surrounding temperature of the cylinder head exhaust channel, and the temperature of the high temperature area can be effectively reduced by reasonably designing the sectional area of the area above the annular cooling channel 22. Moreover, compared with the existing three-layer cross-flow cylinder head water jacket formed by an upper water jacket, a middle water jacket and a lower water jacket, the cylinder head water jacket structure can realize the purpose of integrating the middle water jacket of the cylinder head with the lower water jacket 20 of the cylinder head by designing the circular ring cooling channel 22, so that the number of cylinder head water jacket modules is reduced, and the production difficulty of cylinder head blanks is reduced.

In order to better understand the technical idea of the present utility model, the following description is made in connection with relatively comprehensive technical features.

As shown in fig. 1 to 7, the preferred embodiment of the present utility model provides a cylinder head cooling water jacket comprising a cylinder head upper water jacket 10 and a cylinder head lower water jacket 20, the cylinder head lower water jacket 20 being in communication with the cylinder head upper water jacket 10 through a plurality of water jacket communication water holes 31 arranged on an exhaust side of a cylinder head bottom surface, the cylinder head lower water jacket 20 being in communication with the cylinder head upper water jacket 10 through a plurality of water jacket sand core plug holes 32 arranged on the exhaust side of the cylinder head bottom surface, two coolant water inlets 16 being arranged at a front end of the cylinder head upper water jacket 10, and a coolant water outlet 17 being arranged at a rear end of the cylinder head upper water jacket 10. The cylinder head upper water jacket 10 and the cylinder head lower water jacket 20 are longitudinal flow type cooling water jackets, a plurality of combustion chamber cooling areas 11 matched with a cylinder block of the engine are arranged on the cylinder head upper water jacket 10, a nose bridge area of the combustion chamber cooling areas 11 is provided with cooling water holes 33, one end of each cooling water hole 33 is communicated with the cylinder head upper water jacket 10, and the other end of each cooling water hole is communicated with the cylinder body cooling water jacket. The exhaust side of the cylinder head lower water jacket 20 is provided with a circular ring cooling passage 22, and the circular ring cooling passage 22 is integrally formed in a circular ring structure and is arranged around a first exhaust passage outlet 36 and a second exhaust passage outlet 37.

The utility model provides a cooling water jacket of a longitudinal flow type integrated exhaust manifold cylinder cover, which is characterized in that a cooling water hole 33 is arranged in a nose bridge area, one end of the cooling water hole 33 is positioned on the bottom surface of the cylinder cover and communicated with a cylinder body water jacket, and the other end of the cooling water hole is communicated with a cylinder cover upper water jacket 10 through machining. When the engine runs, the temperature of the cooling liquid in the water jacket of the cylinder block is lower, and the nose bridge area is cooled through each cooling water hole 33; the temperature of the bridge zone of the cylinder cover can be effectively reduced, the temperature of each bridge zone of the cylinder cover is basically the same, and the temperature difference of each bridge zone of the cylinder cover is reduced. And, through the sectional area of the area above the reasonable design ring cooling channel 22, reduce cylinder head cooling water jacket module quantity, reduce cylinder head blank casting technology degree of difficulty.

The utility model also provides a cylinder cover, which comprises a cylinder cover body 30, wherein the cylinder cover cooling water jacket is integrated in the cylinder cover body 30.

Specifically, as shown in fig. 5, a thermostat mounting seat 34 is arranged at the rear end of the cylinder head body 30, an overflow pipe mounting seat 35 is arranged at the exhaust side of the cylinder head body 30, and the thermostat mounting seat 34 and the overflow pipe mounting seat 35 are mounting flanges, respectively forming a thermostat mounting flange surface and an overflow pipe mounting flange surface.

The thermostat is mounted to the cylinder head body 30 through a thermostat mounting seat 34 such that the cylinder head cooling jacket is connected to the cooling system of the engine, and the cylinder head cooling jacket is communicated with the engine cooling system to form a single body. The engine bleed air pipe is mounted to the cylinder head body 30 by a bleed air pipe mounting seat 35.

The utility model also provides an engine, which is provided with the cylinder cover.

The utility model also provides a vehicle provided with the engine.

The above embodiments are merely preferred embodiments for fully explaining the present utility model, and the scope of the present utility model is not limited thereto. Equivalent substitutions and modifications will occur to those skilled in the art based on the present utility model, and are intended to be within the scope of the present utility model.

Claims (11)

1. A cylinder head cooling water jacket comprising an upper cylinder head water jacket (10) and a lower cylinder head water jacket (20) in communication with each other, characterized in that: the cylinder head upper water jacket (10) and the cylinder head lower water jacket (20) are longitudinal flow type cooling water jackets, a plurality of combustion chamber cooling areas (11) matched with a cylinder block of the engine are arranged on the cylinder head upper water jacket (10), a nose bridge area of the combustion chamber cooling areas (11) is provided with cooling water holes (33), one end of each cooling water hole (33) is communicated with the cylinder head upper water jacket (10), and the other end of each cooling water hole is communicated with the cylinder body cooling water jacket so as to synchronously cool each nose bridge area when the engine runs.

2. The cylinder head cooling water jacket according to claim 1, characterized in that: a cooling liquid water inlet (16) is arranged at the front end of the cylinder cover upper water jacket (10), and a cooling liquid water outlet (17) is arranged at the rear end of the cylinder cover upper water jacket.

3. The cylinder head cooling water jacket according to claim 2, characterized in that: the cylinder head lower water jacket (20) is communicated with the cylinder head upper water jacket (10) through a plurality of water jacket communication water holes (31) arranged on the exhaust side of the bottom surface of the cylinder head.

4. The cylinder head cooling water jacket according to claim 2, characterized in that: the cylinder cover lower water jacket (20) is communicated with the cylinder cover upper water jacket (10) through a plurality of water jacket sand core plug holes (32) arranged on the exhaust side of the bottom surface of the cylinder cover.

5. The cylinder head cooling water jacket according to claim 1, characterized in that: the cooling water holes (33) are of a machine-added structure.

6. The cylinder head cooling jacket according to any one of claims 1 to 5, characterized in that: an annular cooling passage (22) surrounding the outlet of the exhaust passage is arranged on the exhaust side of the cylinder head lower water jacket (20).

7. A cylinder head comprising a cylinder head body (30), characterized in that: the cylinder head body (30) is internally integrated with the cylinder head cooling water jacket according to any one of claims 1 to 6.

8. The cylinder head as set forth in claim 7, wherein: the rear end of the cylinder cover body (30) is provided with a thermostat mounting seat (34), and the exhaust side of the cylinder cover body is provided with an overflow pipe mounting seat (35).

9. The cylinder head as set forth in claim 8, wherein: the temperature regulator mounting seat (34) and the air overflow pipe mounting seat (35) are both mounting flanges.

10. An engine, characterized in that: a cylinder head according to any one of claims 7-9.

11. A vehicle, characterized in that: an engine as claimed in claim 10.