Adiabatic internal combustion engine combustion system based on adiabatic combustion chamber and Miller cycle

Abstract

The invention belongs to the related technical field of internal combustion engines, and particularly discloses an adiabatic internal combustion engine combustion system based on an adiabatic combustion chamber and a Miller cycle. According to the system, through combination of an adiabatic cylinder and the Miller cycle, the reliable operation of the internal combustion engine is ensured, and the overall heat efficiency of the internal combustion engine is improved. The system comprises the adiabatic cylinder and a common cylinder, the structure of the adiabatic cylinder is the same as that of the common cylinder, and the inner surface of a combustion chamber of the common cylinder is coated with a heat insulation coating used for reducing heat dissipation loss in the combustion chamber; A heat dissipation air channel is arranged between an exhaust channel of the adiabatic cylinder and an air inlet channel of the common cylinder, and used for connecting the adiabatic cylinder with the common cylinder and introducing excess air of the adiabatic cylinder into a common combustion chamber through secondary scavenging of an exhaust valve under the large-load working condition, and the abnormal combustion trend of the adiabatic cylinder is reduced; and the charging coefficient of the common combustion chamber is increased. The heat efficiency of the internal combustion engine is improved, and the problems that the insulating coating is prone to falling off, and the cylinder inner wall temperature is too high are solved.

Description

technical field [0001] The invention belongs to the technical field related to internal combustion engines, and more specifically relates to an adiabatic internal combustion engine combustion system based on an adiabatic combustion chamber and a Miller cycle. Background technique [0002] Due to its high speed, simple structure, light weight, and stable operation, internal combustion engines are widely used in various fields such as automobiles, ships, and construction machinery. However, internal combustion engines have different forms of energy losses, such as cooling losses, exhaust losses, etc., which reduce their thermal efficiency. With the development of the internal combustion engine industry, the thermal efficiency of the internal combustion engine has become a key bottleneck restricting the development of the internal combustion engine industry, and further improving the thermal efficiency of the internal combustion engine has become a major demand for the internal...

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Problems solved by technology

Specifically, through the design of the thermal insulation coating and the Miller cycle in the thermal insulation cylinder, the overall thermal efficiency of the traditional thermal insulation internal combustion engine is not high, the thermal insulation coating is easy to fall off, and the knocking and deflagration caused by the high wall temperature of the thermal insulation cylinder are solved.

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