Combustion chamber without cylinder cover

Abstract

A combustion chamber without a cylinder cover is characterized in that the combustion chamber is not provided with the cylinder cover at the side near a top dead center of a cylinder piston of an internal combustion engine; the air passage penetrates through the wall of the air cylinder and is communicated with the air cylinder, the center line of the air passage or the tangent line of the air passage at the outlet of the air passage and the radius of the air cylinder are not on the same straight line, and the shape of the piston is matched with the shape of the top of the piston when the piston is at the top dead center to form a complete combustion chamber; an air valve or an oil nozzle or a spark plug or a nozzle of the auxiliary combustion chamber is arranged in the combustion chamber; or the nozzle is provided with an air valve, an oil nozzle or a spark plug or an auxiliary combustion chamber; and one cylinder is provided with at least one cylinder-cover-free combustion chamber. The cylinder cover is omitted, the weight is reduced, the structure is simplified, the manufacturing cost is low, reliability is good, heat loss is little, vibration is little, and noise is low.

Description

Technical fields:

[0001] This invention relates to the combustion chamber of an internal combustion engine, and more particularly to a combustion chamber without a cylinder head that solves the valve configuration problem of a four-stroke opposed piston internal combustion engine. Background technology:

[0002] The combustion chambers of existing internal combustion engines can be classified into: open combustion chambers, semi-open combustion chambers, and separate combustion chambers.

[0003] The piston top of the open combustion chamber is made into a shallow basin shape, which is mainly used in large and medium-sized diesel engines.

[0004] The semi-open combustion chamber has a deep pit shaped like an ω, a sphere, a triangle, or a square on the top of the piston, and is mainly used in small and medium-sized diesel engines.

[0005] The separate combustion chamber consists of a swirl chamber and a pre-combustion chamber, located inside the cylinder head, and is mainly used in small and medium-sized diesel engines.

[0006] Existing internal combustion engine combustion chambers are surrounded by the piston top surface, cylinder wall, and cylinder head. Their disadvantages are that the cylinder head bears high pressure, has a complex structure, is heavy, has a lot of heat loss, and is prone to failure. Summary of the Invention:

[0007] The purpose of this invention is to provide a cylinder head-less combustion chamber, overcoming the shortcomings of existing technologies.

[0008] The technical solution of the present invention to solve the above problems is as follows:

[0009] A headless combustion chamber is characterized in that it is located on the side of the piston near the top dead center of an internal combustion engine cylinder without a cylinder head; its air passage passes through the cylinder wall and communicates with the cylinder, and the center line of the air passage or the tangent at its magnetic air passage outlet is not on the same straight line as the cylinder radius; when the piston is at top dead center, its shape matches the shape of the piston top to form a complete combustion chamber; the combustion chamber contains a valve, fuel injector, spark plug, or nozzle of a secondary combustion chamber; or contains a valve, fuel injector, spark plug, or nozzle of a secondary combustion chamber; each cylinder is equipped with at least one headless combustion chamber.

[0010] This invention provides a novel combustion chamber configuration that overcomes the limitations imposed by the internal combustion engine structure on existing combustion chambers. It offers the following advantages:

[0011] 1. It helps to generate vortices in the cylinder, which can improve fuel-air mixing and combustion.

[0012] 2. Improve ventilation efficiency.

[0013] 3. Reduce losses due to cost-saving measures.

[0014] 4. Solve the valve configuration problem of four-stroke opposed piston internal combustion engines.

[0015] 5. Can increase valve size.

[0016] 6. No cylinder head, lighter weight, simplified structure, lower manufacturing cost, better reliability, less heat loss, less vibration, and lower noise. Attached image description:

[0017] Figure 1 This is a schematic diagram of a structure according to the present invention.

[0018] 1 – Headless combustion chamber; 2 – Valve; 3 – Fuel injector; 4 – Piston; 5 – Cylinder wall. Detailed implementation method:

[0019] The cylinder headless combustion chamber 1 is located on the side near the top dead center of the piston 4 in the diesel engine cylinder without a cylinder head. Its air passage passes through the cylinder wall and communicates with the cylinder. The center line of the air passage or its tangent at the outlet of the air passage is not on the same straight line as the cylinder radius. When the piston is at top dead center, its shape matches the shape of the piston top to form a complete combustion chamber. The cylinder headless combustion chamber contains a fuel injector 3 and valves 2, including intake valves and exhaust valves. It can also have only one type of valve, or no valves, or no fuel injector.

[0020] Each cylinder must be equipped with at least one headless combustion chamber.

Claims

1. A cylinder headless combustion chamber, characterized in that... The combustion chamber is located on the side near the top dead center of the piston in the internal combustion engine cylinder, without a cylinder head; its air passage passes through the cylinder wall and communicates with the cylinder, and the center line of the air passage or its tangent at the outlet of the air passage is not on the same straight line as the cylinder radius. When the piston is at top dead center, its shape matches the shape of the piston top to form a complete combustion chamber; the combustion chamber contains a valve, fuel injector, spark plug, or nozzle of a secondary combustion chamber; or contains a valve, fuel injector, spark plug, or nozzle of a secondary combustion chamber; each cylinder is equipped with at least one cylinder headless combustion chamber.

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