internal combustion engine

Abstract

A two-stroke DC scavenged crosshead internal combustion engine is disclosed. The two-stroke DC scavenged crosshead internal combustion engine includes at least one cylinder, a cylinder head, a piston, a fuel gas supply system, and a scavenging system. The cylinder has a cylinder wall, the cylinder head is disposed on top of the cylinder and has an exhaust valve, and the fuel gas supply system includes a fuel gas valve configured to inject fuel gas into the cylinder during a compression stroke. . The engine further includes a pre-combustion chamber disposed at least partially in the cylinder wall, the pre-combustion chamber leading to the cylinder through a first opening formed in the cylinder wall, the pre-combustion chamber configured to ignite the gas in the cylinder. A mixture of scavenge and fuel gases.

Description

Technical field [0001] The invention relates to a two-stroke DC scavenging crosshead internal combustion engine and a precombustion chamber component of a cylinder. Background technique [0002] Two-stroke internal combustion engines are used as propulsion engines in ships such as container ships, bulk carriers and oil tankers. Reducing unwanted exhaust gases from internal combustion engines has become increasingly important. [0003] An effective way to reduce the amount of unwanted exhaust is to replace fuel, such as heavy fuel oil (HFO), with fuel gas. Fuel gas can be injected into the cylinder at the end of the compression stroke, where it can be ignited immediately by the high temperatures reached when the gas in the cylinder is compressed or by igniting a pilot fuel. However, injecting fuel gas into the cylinder at the end of the compression stroke requires a large gas compressor to compress the fuel gas prior to injection to overcome the larger pressure in the cylin...

AI Technical Summary

Problems solved by technology

[0006] However, providing a pre-chamber for the cylinder head is problematic because due to the presence of other engine components such as exhaust valves, liquid fuel valves for dual-fuel engines and possibly additional fuel valves for tri-fuel engines, the space resources are scarce

The limited space in the cylinder head also limits the number of individual pre-chambers that can be arranged in the cylinder head

[0007] In addition, it will be difficult to control and optimize the temperature of the pre-chamber arranged in the cylinder head, because all other components in the complex shape of the cylinder head must also be considered when designing the cooling system to ensure that all components receive sufficient cooling

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