CN213235244U

CN213235244U - Cylinder head, cylinder gasket and engine with same

Info

Publication number: CN213235244U
Application number: CN202021467645.3U
Authority: CN
Inventors: 李渴忻; 徐菁菁; 刘泉; 杨鹏; 陈国强
Original assignee: Weichai Power Co Ltd
Current assignee: Weichai Power Co Ltd
Priority date: 2020-07-22
Filing date: 2020-07-22
Publication date: 2021-05-18
Anticipated expiration: 2030-07-22

Abstract

The utility model belongs to the technical field of the engine, the utility model provides a cylinder head, cylinder gasket and have its engine, cylinder gasket are equipped with D type throttle water hole, through the throttle water hole shape of design cylinder gasket, and the cooling of adjustment rivers form, reinforcing cylinder head cooling jacket's exhaust bridge of the nose firepower face side and exhaust seat circle (near being close to bridge of the nose district) to the turbulent kinetic energy of reinforcing throttle back coolant liquid is favorable to improving near the heat transfer coefficient in bridge of the nose district, and each jar homogeneity of adjustment water jacket. The resistance of the water jacket is improved by throttling the cylinder gasket, so that the water taking amount of accessories such as an EGR (exhaust gas recirculation) cooler and the like is favorably improved, and the device is particularly suitable for a machine type with high EGR (exhaust gas recirculation) rate.

Description

Cylinder head, cylinder gasket and engine with same

Technical Field

The utility model belongs to the technical field of the engine, concretely relates to cylinder head. The utility model discloses still relate to a cylinder gasket and an engine.

Background

This section provides background information related to the present disclosure only and is not necessarily prior art.

Modern engines are increasingly strengthened, the explosion pressure in the cylinder is increasingly high, the thermal load and the mechanical load borne by the cylinder cover are increasingly high, and the existing cylinder cover puts higher requirements on the cooling capacity of the cooling water jacket. Generally, the cooling capacity can be improved by increasing the flow rate of the water pump, but the increase of the flow rate of the water pump also increases the system resistance, so that the performance of the water pump needs to be greatly improved, the power consumption of the water pump is increased, and the performance of an engine is not favorable. It is therefore desirable to design a more rational water jacket structure to ensure a higher demand for cooling.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem of the prior art that the cooling performance of the cylinder head cooling water jacket is not good at least, the purpose is realized through the following technical scheme:

the utility model discloses a first aspect provides a cylinder head, the cylinder head is equipped with two at least intake ducts, two at least exhaust passages and inside cooling jacket, cooling jacket includes water inlet and delivery port, adjacent two of cylinder head region between the exhaust passage forms the nose bridge district, cooling jacket the central axis of water inlet with in the nose bridge district cooling jacket's axis is crossing.

The utility model provides a cooling jacket setting in the nose bridge district is aimed at cooling jacket's water inlet to the cylinder head, and is good to the cooling effect in nose bridge district for the cylinder head satisfies the model and strengthens the index.

The utility model discloses a second aspect provides a cylinder gasket, assemble at the engine cylinder body and the utility model discloses a between the cylinder head that the first aspect provided, the cylinder gasket corresponds the cylinder head the position of water inlet is equipped with the throttle water hole, the throttle water hole is less than along the area in radial direction's cross-section the water inlet is along the area in radial direction's cross-section, and the throttle water hole is the D type along the cross-section in radial direction.

The utility model discloses the cylinder gasket that the second aspect provided is equipped with D type throttle water hole, through the throttle water hole shape of design cylinder gasket, adjusts the rivers form, and the cooling of reinforcing air discharge bridge of the nose firepower face side and exhaust seat circle (near being close to bridge of the nose district) to the turbulent kinetic energy of coolant liquid behind the reinforcing throttle is favorable to improving near heat transfer coefficient in bridge of the nose district, adjusts each jar homogeneity of water jacket. The resistance of the water jacket is improved by throttling the cylinder gasket, so that the water taking amount of accessories such as an EGR (exhaust gas recirculation) cooler and the like is favorably improved, and the device is particularly suitable for a machine type with high EGR (exhaust gas recirculation) rate.

In some embodiments of the present invention, the throttle hole is located the head gasket corresponds to the position of the head gasket near the water inlet in the nose bridge area.

In some embodiments of the present invention, the inner wall of the cambered surface of the water-saving hole faces away from the direction of the nose bridge area.

The utility model discloses a third aspect provides an engine, the engine includes:

a cylinder body;

a cylinder head, the cylinder head being the cylinder head set forth in the first aspect of the present invention;

a cylinder gasket, the cylinder gasket assembly be in the cylinder body with between the cylinder head, the cylinder gasket the throttle water hole with the cylinder head the water inlet butt joint, the cylinder gasket does the utility model discloses the cylinder gasket that the second aspect provided.

The utility model discloses the engine that the third aspect provided have with the utility model discloses the cylinder head that the first aspect provided with the utility model discloses the cylinder gasket that the second aspect provided is the same beneficial effect, no longer gives unnecessary details here.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like parts are designated by like reference numerals throughout the drawings. In the drawings:

fig. 1 schematically shows a structural schematic view of a throttle water hole and a cooling water jacket according to an embodiment of the present invention;

fig. 2 schematically shows a structural schematic view of a cooling water jacket according to an embodiment of the present invention;

fig. 3 schematically shows a schematic structural view of a cylinder head gasket according to an embodiment of the present invention;

fig. 4 schematically illustrates a flow velocity cloud plot on the fire face side of the nose bridge of the exhaust when a cylinder head according to an embodiment of the present invention employs a circular water saving orifice;

fig. 5 schematically shows a flow velocity cloud diagram of the exhaust nose bridge fire face side when a D-shaped throttle hole is employed by a cylinder head according to an embodiment of the present invention;

fig. 6 schematically shows a flow velocity vector diagram of the side of the firing face of the bridge of the exhaust nose when a cylinder head according to an embodiment of the present invention employs a circular water saving hole;

fig. 7 schematically shows a flow velocity vector diagram of the exhaust nose bridge fire face side when a D-shaped throttle hole is employed by a cylinder head according to an embodiment of the present invention;

fig. 8 schematically illustrates a flow velocity vector diagram of the exhaust nose bridge seat ring side when a cylinder head according to an embodiment of the present invention employs a circular water saving hole;

fig. 9 schematically illustrates a flow velocity vector diagram of the exhaust nose bridge seat ring side when a D-shaped throttle bore is employed by a cylinder head according to an embodiment of the present invention;

the reference symbols in the drawings denote the following:

10: cooling water jacket, 11: cooling water jacket in the nose bridge region, 12: first region, 13: a second region;

20: cylinder gasket, 21: water-throttling hole, 22: cylinder bore, 23: auxiliary water hole, 24: bolt holes;

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless specifically identified as an order of performance. It should also be understood that additional or alternative steps may be used.

Although the terms, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "second" and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, an element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

For convenience of description, spatially relative terms, such as "inner", "outer", "inner", "side", "lower", "below", "upper", "above", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" can include both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

As shown in fig. 1 to 2, a first aspect of the present invention provides a cylinder head, the cylinder head is provided with at least two intake ducts, at least two exhaust ducts, and an internal cooling jacket 10, the cooling jacket 10 includes a water inlet and a water outlet, a nose bridge region is a region of the cylinder head between two adjacent exhaust ducts, and a central axis of the water inlet of the cooling jacket 10 intersects with an axis of a cooling jacket 11 in the nose bridge region.

The utility model provides a cylinder head aims at cooling jacket 11 setting in the nose bridge district with cooling jacket 10's water inlet, particularly, the axis of water inlet is the central axis of water inlet section water course, and cooling jacket 11's in the nose bridge district axis is cooling jacket at nose bridge district part (B line in fig. 1), and the axis of water inlet intersects with cooling jacket 11's in the nose bridge district axis to make the water inlet aim at cooling jacket 11 in the nose bridge district. The cooling effect on the nose bridge area 11 is good, so that the cylinder cover meets the model strengthening index.

The utility model discloses a second aspect provides a cylinder gasket 20, the assembly at the engine cylinder body and the utility model discloses a between the cylinder head that the first aspect provided, be equipped with a plurality of bolt holes 24 on the cylinder gasket 20 and be used for assembly bolt in order to connect organism or cylinder head, cylinder gasket 20 is equipped with a plurality of cylinder holes 22, the position of the water inlet that cylinder gasket 20 corresponds the cylinder head is equipped with throttle water hole 20, throttle water hole 20's both sides still are equipped with vice water hole 23, throttle water hole 20 is less than the water inlet along the area of the cross-section of radial direction, throttle water hole 20's cross sectional area is less than the cross sectional area of water inlet in order to reach the effect of throttle, and throttle water hole 20 is the D type along the cross-section of.

The utility model discloses the head gasket that the second aspect provided is equipped with D type throttle water hole 20, through the 20 shapes in the throttle water hole of design head gasket 20, adjusts the rivers form, strengthens the cooling of air discharge nose bridge firepower face side and exhaust seat circle (near being close to bridge of the nose district) to the turbulent kinetic energy of coolant liquid behind the reinforcing throttle is favorable to improving near heat transfer coefficient in bridge of the nose district, adjusts each jar homogeneity of water jacket. The resistance of the water jacket is improved by throttling the cylinder gasket, so that the water taking amount of accessories such as an EGR (exhaust gas recirculation) cooler and the like is favorably improved, and the device is particularly suitable for a machine type with high EGR (exhaust gas recirculation) rate.

As shown in fig. 3 and 4, it can be seen that the side of the thermal side of the nose bridge of the exhaust nose is darker after the D-shaped water-saving holes 20 are adopted, so that the flow velocity of the cooling liquid is obviously increased, the turbulent energy of the cooling liquid is enhanced, and the heat exchange coefficient near the nose bridge region 11 is favorably increased.

As shown in fig. 5 and 6, the arrows in the drawings indicate the side of the heating surface, and it can be seen that the side of the heating surface of the bridge of the exhaust nose is provided with a lot of dark arrows after the D-shaped water-saving holes 20 are adopted, and it can be seen that the flow velocity of the cooling liquid at the position after the D-shaped water-saving holes 20 are adopted is obviously increased, the turbulent kinetic energy of the cooling liquid is enhanced, and the heat exchange coefficient near the bridge region 11 is favorably improved.

Referring to fig. 7 and 8, it can be seen that the exhaust nose bridge race side is darker after the D-shaped water-saving holes 20 are adopted, and it can be seen that the flow velocity of the coolant is obviously increased, the turbulent kinetic energy of the coolant is enhanced, and the heat exchange coefficient near the nose bridge region 11 is favorably improved.

As shown in FIG. 1, in some embodiments of the present invention, the radial cross section of the water inlet of the cylinder head 20 is divided into a first area 12 and a second area 13 by a diameter line (line A in FIG. 1) perpendicular to the nose bridge area, the second area 13 is far away from the nose bridge area 11 compared with the first area 12, and the throttle hole 20 is disposed at the position of the cylinder head gasket corresponding to the second area 13, so as to enhance the cooling of the thermal side of the exhaust nose bridge area 11 and the exhaust seat ring (near the nose bridge area 11), enhance the turbulent kinetic energy of the cooling liquid after throttling, and facilitate the improvement of the heat exchange coefficient near the nose bridge area 11.

The utility model discloses a some embodiments, the cambered surface inner wall orientation of throttle water hole 20 is kept away from nose bridge zone 11's direction to the cooling of 11 firepower face sides in reinforcing exhaust nose bridge zone and exhaust seat circle (being close to near nose bridge zone 11), the turbulent kinetic energy of coolant liquid after the reinforcing throttle is favorable to improving the heat transfer coefficient near nose bridge zone 11, reduces the risk of cylinder cap and valve fault.

The utility model discloses the third aspect provides an engine, and the engine includes:

a cylinder body;

the cylinder cover is the cylinder cover provided by the first aspect of the utility model;

the cylinder gasket, the cylinder gasket assembly is between cylinder body and cylinder cap, and the water inlet butt joint of throttle water hole 20 and cylinder cap of cylinder gasket, the cylinder gasket do the utility model discloses the cylinder gasket that the second aspect provided.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A cylinder head provided with at least two intake ducts, at least two exhaust ducts, and an internal cooling jacket comprising a water inlet and a water outlet, characterized in that a region between two adjacent exhaust ducts of the cylinder head forms a nose bridge region, and a central axis of the water inlet of the cooling jacket intersects with an axis of the cooling jacket in the nose bridge region.

2. A head gasket fitted between an engine block and a cylinder head according to claim 1, wherein the head gasket is provided with a throttle water hole for butting against a water inlet of a cooling jacket of the cylinder head, the throttle water hole has a cross section in a radial direction smaller in area than a cross section of the water inlet in the radial direction, and the throttle water hole has a D-shaped cross section in the radial direction.

3. The head gasket of claim 2, wherein a radial cross-section of said water inlet of said cylinder head is divided into a first region and a second region along a diametrical line perpendicular to said nose bridge region, said second region being located farther from said nose bridge region than said first region, said water-restriction hole being provided in said head gasket at a position corresponding to said second region.

4. The head gasket of claim 3, wherein said orifices have curved inner walls facing toward said nose bridge region.

5. An engine, characterized in that the engine comprises:

a cylinder body;

a cylinder head according to claim 1;

the head gasket according to any one of claims 2 to 4, which is fitted between the block and the cylinder head, the throttle water hole of the head gasket being butted against the water inlet of the cylinder head.