CN210509413U

CN210509413U - Engine cylinder cover

Info

Publication number: CN210509413U
Application number: CN201921305851.1U
Authority: CN
Inventors: 凌青海; 黄前海; 陈浩; 黄刚; 蒲亚军
Original assignee: Chongqing Sokon Industry Group Co Ltd
Current assignee: Seres Group Co Ltd
Priority date: 2019-08-13
Filing date: 2019-08-13
Publication date: 2020-05-12
Anticipated expiration: 2029-08-13

Abstract

The utility model discloses an engine cylinder head, including having the cylinder head casing that holds the cavity and integrating the exhaust manifold in the cylinder head casing, the outside of cylinder head casing still integrates high-pressure fuel pump seat to installation high-pressure fuel pump tappet, this engine cylinder head can effectively reduce the spare part quantity of engine when guaranteeing engine cylinder head functionality, simplifies the engine structure, and reduces the vibrations noise of engine.

Description

Engine cylinder cover

Technical Field

The utility model relates to an automobile manufacturing technical field especially relates to engine cylinder head.

Background

The engine cylinder head is mounted on the block, seals the cylinder from above and constitutes a combustion chamber, which is often in contact with high-temperature and high-pressure combustion gases and therefore is subjected to great thermal and mechanical loads. The internal combustion engine is also required to be used together with a high-pressure fuel pump and an exhaust manifold, the high-pressure fuel pump is mounted at the rear end of the cylinder head through a high-pressure fuel pump seat, is connected with a gasoline low-pressure pipe and a nozzle guide rail, is driven by a cam shaft, compresses gasoline from the low-pressure oil pipe into high-pressure fuel and then directly injects the high-pressure fuel into the cylinder, and the exhaust manifold is used for supplying exhaust gas discharged from the cylinder to a catalytic converter.

Meanwhile, conventional high pressure fuel pumps, as well as the high pressure fuel pump mount and exhaust manifold, are typically manufactured as separate components from the engine, being coupled to the cylinder head using bolts or similar fasteners. Resulting in increased design and manufacturing costs of parts of the engine, complicated engine structure, and generation of vibration noise.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an engine cylinder head, this engine cylinder head have integrateed high-pressure fuel pump seat and exhaust manifold, can effectively reduce the spare part quantity of engine, simplify the engine structure to reduce the vibrations noise of engine.

In order to achieve the above object, the present invention provides the following technical solutions:

an engine cylinder head includes a cylinder head housing having a receiving cavity, and an exhaust manifold integrated in the cylinder head housing, an exhaust port and a plurality of intake camshaft holes for mounting an intake camshaft being provided outside the cylinder head housing, the exhaust manifold communicating with the exhaust port;

the high-pressure fuel pump is characterized in that a high-pressure fuel pump seat is further integrated on the outer side of the cylinder cover shell, and the high-pressure fuel pump seat is located at the tail end of the air inlet cam shaft to mount a high-pressure fuel pump tappet.

Preferably, the high-pressure fuel pump tappet is mounted on the high-pressure fuel pump seat in a direction perpendicular to the intake camshaft and is driven by the camshaft to operate.

Preferably, the bottom surface of the cylinder cover shell is arranged on a cylinder to form a closed combustion chamber, the bottom surface of the cylinder cover shell is further provided with an oil injector mounting hole, the oil injector mounting hole is used for mounting an oil injector, one end of the oil injector is connected with the high-pressure fuel pump to obtain high-pressure fuel oil, and the other end of the oil injector directly injects the fuel oil into the combustion chamber.

Preferably, an intake manifold communicated with the combustion chamber is arranged in the cylinder head casing, an intake port is formed in the cylinder head casing, and the intake port is communicated with the intake manifold.

Preferably, at least one piece of cooling water jacket is further arranged in the accommodating cavity, and the cooling water jacket is in surface contact with the exhaust manifold.

Further, an EGR gas taking port is further arranged on the cylinder cover shell and communicated with the exhaust manifold.

Preferably, a vacuum pump interface is further arranged on the cylinder cover shell and is arranged beside the high-pressure fuel pump seat and used for installing and fixing a vacuum pump.

Preferably, the cylinder head shell is further provided with a warm air intake and a chain tensioner mounting port.

Compared with the prior art, the utility model provides an engine cylinder head has following beneficial effect:

the utility model provides an engine cylinder cover, including the cylinder cover casing that has the accommodation cavity and the exhaust manifold of integration in the cylinder cover casing, the outside of cylinder cover casing is equipped with the gas vent that communicates with exhaust manifold, through integrating exhaust manifold to the cylinder cover exhaust side, saved the cost of development, production and later maintenance of independent exhaust system; the high-pressure fuel pump seat is positioned at the tail end of the air inlet cam shaft so as to install a high-pressure fuel pump tappet, and the development, production, installation and later maintenance costs of the independent high-pressure fuel pump seat are saved by integrating the high-pressure fuel pump seat to the side of the air inlet cam shaft of the cylinder cover, the assembly error of the high-pressure fuel pump seat is reduced, and the verticality requirement of the cam shaft and the high-pressure fuel pump tappet is effectively ensured; in addition, the integrated high-pressure fuel pump seat and the exhaust manifold reduce vibration noise and thermal fatigue, improve the reliability and NVH performance of an exhaust system, save the arrangement space of parts of the cylinder cover and enable the cylinder cover to be more compact in structure.

Drawings

The accompanying drawings, which are described herein, serve to provide a further understanding of the invention and constitute a part of this specification, and the exemplary embodiments and descriptions thereof are provided for explaining the invention without unduly limiting it. In the drawings:

fig. 1 is a schematic view of a first perspective structure of an engine cylinder head according to an embodiment of the present invention;

fig. 2 is a schematic diagram of a second perspective structure of the engine cylinder head according to the embodiment of the present invention.

Reference numerals:

1-cylinder cover shell, 2-high pressure fuel pump seat;

3-intake camshaft hole, 4-exhaust manifold;

5-exhaust port, 6-vacuum pump interface;

7-exhaust camshaft hole, 8-EGR gas taking port;

9-warm air intake and 10-air inlet;

11-intake manifold, 12-chain tensioner mounting port;

13-injector mounting hole.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail with reference to the accompanying drawings. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

Referring to fig. 1, the cylinder head of the engine according to the present embodiment includes a cylinder head housing 1 having a receiving cavity and an exhaust manifold 4 integrated in the cylinder head housing, an exhaust port 5 and a plurality of intake camshaft holes 3 for mounting an intake camshaft are disposed on an outer side of the cylinder head housing 1, and the exhaust manifold 4 is communicated with the exhaust port 5; the outer side of the cylinder cover shell 1 is further integrated with a high-pressure fuel pump seat 2, and the high-pressure fuel pump seat 2 is located at the tail end of the air inlet cam shaft to be provided with a high-pressure fuel pump tappet.

The engine cylinder cover provided by the embodiment of the utility model saves the development, production and later maintenance costs of an independent exhaust system by integrating the exhaust manifold 4 to the exhaust side of the cylinder cover; through the integration of the high-pressure fuel pump base 2 to the cylinder cover air inlet camshaft side, the development, production, installation and later maintenance costs of the independent high-pressure fuel pump base 2 are saved, the assembly error existing when the independently designed high-pressure fuel pump base 2 is installed is reduced, and the perpendicularity requirement of the camshaft and a high-pressure fuel pump tappet is effectively guaranteed.

In addition, the integrated high-pressure fuel pump seat and the exhaust manifold reduce vibration noise and thermal fatigue, improve the reliability and NVH performance of an exhaust system, save the arrangement space of parts of the cylinder cover and enable the cylinder cover to be more compact in structure.

The embodiment of the utility model provides an among the engine cylinder head, high-pressure fuel pump tappet is installed on high-pressure fuel pump seat 2 with perpendicular to air intake camshaft's direction to operate under the drive of camshaft. Specifically, the high-pressure fuel pump tappet mounting hole is formed in the high-pressure fuel pump seat 2 and used for mounting and fixing the high-pressure fuel pump tappet, assembly errors and vibration noises existing when the high-pressure fuel pump seat 2 which is designed independently is mounted are reduced, and the perpendicularity requirement of the camshaft and the high-pressure fuel pump tappet is effectively guaranteed.

With reference to fig. 1 or fig. 2, in the cylinder head of the engine according to the embodiment of the present invention, the bottom surface of the cylinder head casing 1 is installed on the cylinder to form an enclosed combustion chamber, the bottom surface of the cylinder head casing 1 is further provided with an injector installation hole 13, the injector installation hole 13 is used for installing an injector, one end of the injector is connected to the high-pressure fuel pump to obtain high-pressure fuel, and the other end of the injector directly injects the fuel into the combustion chamber. Preferably, the high-pressure fuel pump seat 2 and the fuel injector mounting hole 13 are provided with fuel passages, the fuel passages are accommodated in an inner accommodating cavity of the cylinder cover shell, and the high-pressure fuel pump is mounted on the high-pressure fuel pump seat 2 and then can directly convey high-pressure fuel to the fuel injector through the fuel passages, so that the problem that a pipeline used in a matched mode needs to be mounted to the fuel injector when the high-pressure fuel pump seat 2 is independently designed is solved, the problems that high-pressure fuel is not conveyed smoothly due to assembly errors existing in the high-pressure fuel pump seat 2 and the like are solved, and vibration noise of an engine caused by mounting of too many external parts is reduced.

With reference to fig. 1 or fig. 2, in the cylinder head of the engine according to the embodiment of the present invention, at least one cooling water jacket is further disposed inside the accommodating cavity, and the cooling water jacket is in surface contact with the exhaust manifold 4. Specifically, the top and/or the bottom of the exhaust manifold 4 is in contact with the cooling water jacket, and after the exhaust manifold 4 is cooled by the cooling water jacket, the temperature and the pressure of exhaust gas from the exhaust manifold are greatly reduced, so that the thermal stress and the thermal strain of components such as a three-way catalyst connected with the exhaust port 5 are reduced, and the vibration noise of the engine caused by excessive installation of external parts is also reduced.

The cylinder head housing 1 is also provided with an EGR gas intake port 8, and the EGR gas intake port 8 is communicated with the exhaust manifold 4. Specifically, the side of 5 exhaust ports are located to EGR gas intaking mouth 8 communicates exhaust manifold 4 in the inside accommodation cavity of cylinder head casing 1, and it is unobstructed to be more favorable to EGR gas intaking mouth 8 to get gas, can save the spare part arrangement space of cylinder head simultaneously, makes the cylinder head structure compacter, reduces the vibrations noise of the engine that too much outside spare part installation was introduced simultaneously.

With reference to fig. 1 or fig. 2, an intake manifold 11 communicated with a combustion chamber is arranged in the cylinder head housing 1, an intake port 10 is formed in the cylinder head housing 1, the intake port 10 is communicated with the intake manifold 11, a vacuum pump interface 6 is further arranged on the cylinder head housing 1, the vacuum pump interface 6 is arranged beside the high-pressure fuel pump seat 2 and is used for mounting and fixing a vacuum pump, a warm air intake port 9 and a chain tensioner mounting port 12 are further formed in the cylinder head housing 1, so that the arrangement space of parts of the cylinder head is effectively saved, the functionality of the cylinder head is improved while the structure of the cylinder head is more compact, and the vibration noise of an engine caused by the installation of too many external parts is reduced.

In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. An engine cylinder head comprising a cylinder head housing having a receiving cavity and an exhaust manifold integrated into the cylinder head housing, the cylinder head housing being provided on an outer side thereof with an exhaust port and a plurality of intake camshaft bores for mounting an intake camshaft, the exhaust manifold communicating with the exhaust port;

2. The engine cylinder head of claim 1, wherein said high pressure fuel pump tappet is mounted on said high pressure fuel pump mount in a direction perpendicular to said intake camshaft and is driven by said camshaft to operate.

3. The engine cylinder head according to claim 1, wherein the bottom surface of the cylinder head housing is mounted on the cylinder to form a closed combustion chamber, and the bottom surface of the cylinder head housing is further provided with an injector mounting hole for mounting an injector, wherein one end of the injector is connected to the high-pressure fuel pump to obtain high-pressure fuel, and the other end of the injector directly injects the fuel into the combustion chamber.

4. The engine cylinder head according to claim 3, wherein an intake manifold communicating with the combustion chamber is provided in the cylinder head housing, and an intake port is opened in the cylinder head housing, the intake port communicating with the intake manifold.

5. The engine cylinder head according to claim 1, wherein the receiving cavity is further provided inside with at least one piece of a cooling water jacket that is in surface contact with the exhaust manifold.

6. The engine cylinder head according to claim 1, further comprising an EGR gas intake port provided in the cylinder head housing, the EGR gas intake port communicating with the exhaust manifold.

7. The engine cylinder head according to claim 1, characterized in that a vacuum pump port is further provided on the cylinder head casing, and the vacuum pump port is provided beside the high-pressure fuel pump seat and used for installing and fixing a vacuum pump.

8. The engine cylinder head according to claim 1, characterized in that the cylinder head casing is further provided with a warm air intake and a chain tensioner mounting port.