An engine cylinder head and an engine

Abstract

The utility model relates to the field of engine, disclose a kind of engine cylinder head and engine, engine cylinder head is the double spark plug forced air cooling cylinder head of wind channel with wind guide rib, cylinder head sets up three cooling air duct, at least two wind guide ribs are arranged in cooling air duct, the opening of wind guide rib is aligned with the spark plug position of leeward side, make cooling wind in time guide leeward side spark plug when passing through cooling air duct, and accelerate the flow rate of cooling wind in air duct, simultaneously reasonably distribute the air volume in each cooling air duct, fully cool spark plug, inlet and outlet air duct and combustion chamber, cooling wind utilization rate is high, power consumption is low, cooling effect is good, the engine of using this structure thermal load is low, prolongs the service life of engine.

Description

Technical Field

[0001] This utility model relates to the field of engines, specifically to an engine cylinder head and an engine. Background Technology

[0002] In the design of existing engine cylinder heads, cooling air ducts are typically installed above the combustion chamber, with one to three ducts. These ducts often lack air guides or have only one guide at most. During engine operation, cooling air passes through these ducts to cool the combustion chamber and meet the engine's normal operating requirements. This type of cylinder head design results in low cooling air utilization, poor cooling effect, and high power consumption. In particular, for dual spark plug structures, the leeward spark plug cannot be effectively cooled by the cooling air, causing its temperature to rise and potentially leading to abnormal combustion (detonation). This results in high engine thermal load and low reliability. Utility Model Content

[0003] The present invention aims to provide an engine to solve the problem of abnormal combustion and high engine heat load caused by the inability of the cooling air to effectively cool the spark plug on the leeward side of the cylinder head in existing engines.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: an engine cylinder head, comprising a cylinder head body, wherein the cylinder head body is provided with a first spark plug mounting hole, a second spark plug mounting hole, a cooling air duct for cooling airflow, an intake air duct and an exhaust air duct, and a combustion chamber. The cooling air duct includes a first air duct, a second air duct, a third air duct, and at least two air guide ribs. The first spark plug mounting hole is located on the first air duct, and the second spark plug mounting hole is located on the opposite side of the first air duct. The air guide ribs are provided with openings aligned with the first spark plug mounting hole or the second spark plug mounting hole. The intake air duct and the exhaust air duct are distributed on opposite sides of the cylinder head body between the first spark plug mounting hole and the second spark plug mounting hole.

[0005] Preferably, as an improvement, the first spark plug mounting hole and the second spark plug mounting hole are distributed on opposite sides at both ends of the combustion chamber in the lateral direction, and the intake manifold and the exhaust manifold are distributed on opposite sides at both ends of the combustion chamber in the longitudinal direction.

[0006] Preferably, as an improvement, the second air duct is located between the intake duct and the second spark plug mounting hole.

[0007] Preferably, as an improvement, the third air duct is located between the exhaust duct and the second spark plug mounting hole.

[0008] Preferably, as an improvement, the opening on the air guide rib is aligned with the second spark plug mounting hole.

[0009] The principle and advantages of this scheme are as follows: In practical application, spark plugs are installed in the first and second spark plug mounting holes respectively. After the fuel enters the cylinder head combustion chamber, it is ignited by the spark plug. The heat energy of combustion is transferred to the combustion chamber, spark plug, and cylinder head. Forced cooling air is injected into the first air duct. The forced cooling air enters the first air duct to cool the spark plug in the first spark plug mounting hole. Then, the opening on the air guide rib guides the cooling air to the spark plug at the second spark plug mounting hole. The air guide rib and the intake manifold wall guide the cooling air to the second air duct. The air guide rib and the exhaust manifold wall guide the cooling air to the third air duct. The air guide rib, intake manifold wall, and exhaust manifold wall can improve the utilization rate of the forced cooling air in the entire air duct structure and rationally distribute the forced cooling air to the second and third air ducts to achieve cooling of the combustion chamber surface and the rear spark plug. This airflow structure improves the cooling effect of the spark plugs on the rear side of the dual-spark plug cylinder head, while also rationally distributing the airflow of each airflow duct, increasing the utilization rate of cooling air, reducing the engine's thermal load and energy loss, and helping to extend the engine's service life.

[0010] This utility model also provides an engine that uses the engine cylinder head described above.

[0011] Such engines have good air-cooling performance and are less prone to high heat load issues. Attached Figure Description

[0012] Figure 1 This is a structural schematic diagram of Embodiment 1 of the present utility model.

[0013] Figure 2 for Figure 1 A sectional view along the AA direction. Detailed Implementation

[0014] The following detailed description illustrates the specific implementation method:

[0015] The reference numerals in the accompanying drawings include: cylinder head body 1, first air duct 2, first spark plug mounting hole 3, first air guide rib 4, exhaust duct 5, third air duct 6, combustion chamber 7, second spark plug mounting hole 8, second air duct 9, intake duct 10, and second air guide rib 11.

[0016] Example 1, basically as shown in the attached document. Figure 1 , Figure 2The image shows an engine cylinder head, comprising a cylinder head body 1, a combustion chamber 7 within the cylinder head body 1, a first spark plug mounting hole 3 and a second spark plug mounting hole 8 arranged on the combustion chamber 7, and a first air duct 2, a second air duct 9, a third air duct 6, a first air guide rib 4, a second air guide rib 11 located outside the combustion chamber 7, as well as an intake duct 10 and an exhaust duct 5 communicating with the combustion chamber 7. The first spark plug mounting hole 3 is arranged on the first air duct 2, and the second spark plug mounting hole 8 is arranged on the opposite side of the first air duct 2, opposite to the first spark plug mounting hole 3. The first spark plug mounting hole 3 and the second spark plug mounting hole 8 are distributed opposite each other at both ends of the combustion chamber 7 laterally, and the intake duct 10 and the exhaust duct 5 are distributed opposite each other at both ends of the combustion chamber 7 longitudinally. The second air duct 9 is located between the intake duct 10 and the second spark plug mounting hole 8, the third air duct 6 is located between the exhaust duct 5 and the second spark plug mounting hole 8, the first air guide rib 4 and the second air guide rib 11 are integrally formed between the cylinder head body 1 and the combustion chamber 7, and the first air guide rib 4 and the second air guide rib 11 are provided with openings aligned with the second spark plug mounting hole 8.

[0017] The specific implementation process is as follows: Spark plugs are installed in the first spark plug mounting hole 3 and the second spark plug mounting hole 8 respectively. After the fuel enters the combustion chamber 7, it is ignited by the spark plug. The heat energy of combustion is transferred to the combustion chamber 7, the spark plug and the cylinder head. Forced cooling air is injected into the first air duct 2. The forced cooling air enters the first spark plug mounting hole 3 through the first air duct 2 to cool the spark plug. Then, the openings on the first air guide rib 4 and the second air guide rib 11 guide the cooling air to the spark plug at the second spark plug mounting hole 8. The second air guide rib 11 and the outer wall of the intake duct 10 guide the cooling air to the second air duct 9. The first air guide rib 4 and the outer wall of the exhaust duct 5 guide the cooling air to the third air duct 6. The first air guide rib 4, the second air guide rib 11, the outer wall of the intake duct 10 and the outer wall of the exhaust duct 5 can improve the utilization rate of the forced cooling air in the entire air duct structure and reasonably distribute the forced cooling air to the second air duct 9 and the third air duct 6 to achieve cooling of the surface of the combustion chamber 7 and the rear spark plug. This airflow structure improves the cooling effect of the spark plugs on the rear side of the dual-spark plug cylinder head, while also rationally distributing the airflow of each airflow duct, increasing the utilization rate of cooling air, reducing the engine's thermal load and energy loss, and helping to extend the engine's service life.

[0018] Example 2: Engine, using a cylinder head from Example 1. This type of engine has good air-cooling performance and is less prone to high heat load issues.

[0019] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. An engine cylinder head, comprising a cylinder head body, wherein the cylinder head body is provided with a first spark plug mounting hole, a second spark plug mounting hole, a cooling air duct for cooling airflow, an intake duct and an exhaust duct, and a combustion chamber, characterized in that: The cooling air duct includes a first air duct, a second air duct, a third air duct, and at least two air guide ribs. The first spark plug mounting hole is located on the first air duct, and the second spark plug mounting hole is located on the opposite side of the first air duct. The air guide ribs are provided with openings aligned with the first or second spark plug mounting hole. The intake and exhaust passages are distributed on opposite sides on the cylinder head body between the first and second spark plug mounting holes.

2. The engine cylinder head according to claim 1, characterized in that: The first spark plug mounting hole and the second spark plug mounting hole are distributed on opposite sides at both ends of the combustion chamber in the transverse direction, and the intake manifold and the exhaust manifold are distributed on opposite sides at both ends of the combustion chamber in the longitudinal direction.

3. An engine cylinder head according to claim 1, characterized in that: The second air duct is located between the air intake duct and the second spark plug mounting hole.

4. An engine cylinder head according to claim 1, characterized in that: The third air duct is located between the exhaust duct and the second spark plug mounting hole.

5. An engine cylinder head according to claim 1, characterized in that: The opening on the air guide rib is aligned with the second spark plug mounting hole.

6. An engine, characterized in that: An engine cylinder head as described in any one of claims 1-5 is used.

Images