Pre-combustion chamber, internal combustion engine and automobile

Abstract

The invention relates to the technical field of automobiles, and discloses a pre-combustion chamber, an internal combustion engine and an automobile. A first injection hole is formed in the end, usedfor extending into a chamber of a main combustion chamber of the internal combustion engine, of the pre-combustion chamber, one end of the first injection hole communicates with a chamber of the pre-combustion chamber, and the other end of the first injection hole communicates with the chamber of the main combustion chamber. The hole diameter of the first injection hole gradually increases from one end communicating with the chamber of the pre-combustion chamber to one end communicating with the chamber of the main combustion chamber. The pre-combustion chamber has the advantages that when thehigh-temperature and high-pressure gas enters the chamber of the main combustion chamber of the internal combustion engine from the chamber of the pre-combustion chamber through the first injection hole, the penetration distance of the jet flame can be reduced, the situation that the jet flame is in contact with a piston or the cylinder wall of the main combustion chamber prematurely is avoided,and the heat transfer loss is reduced.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a pre-combustion chamber, an internal combustion engine and an automobile. Background technique [0002] Internal combustion engines are mainly divided into heat engines such as gasoline engines and diesel engines. In recent years, traditional gasoline engines have been continuously challenged by fuel consumption regulations, emission regulations and new energy development. Currently, the effective thermal efficiency of mainstream mass-produced gasoline engines is 38-41%. In the future, an effective thermal efficiency of 45% or higher will become an urgent demand and development direction of the gasoline engine industry. With the continuous improvement of the effective thermal efficiency target, the research and application of the pre-combustion chamber on the gasoline engine is gradually widespread, and it is considered to be one of the most promising technical routes for ...

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Problems solved by technology

[0004] However, at present, the application of the pre-combustion chamber on gasoline engines mainly has the following problems: 1. While the jet flame increases the combustion speed, if the penetration distance is large, the jet flame will contact the piston or cylinder wall prematurely, which will increase significantly Heat transfer, causing heat damage, is not worth the candle; 2. During cold start, a rear combustion center of gravity is required to maintain a high exhaust temperature to promote rapid ignition of the catalytic converter on the exhaust pipeline (catalytic converter ignition requires a relatively high high temperature), but the rapid combustion of the pre-chamber and the supercooled wall of the main combustion chamber make it difficult for the combustion center of gravity to be particularly rearward

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