Variable compression ratio engine and automobile

Abstract

The invention discloses a variable compression ratio engine and an automobile. A plurality of combustion chambers are formed between an air cylinder cover (1) and an air cylinder body of the engine. Adrive motor (2) and a plurality of center pistons (3) are further included. Each center piston (3) is internally provided with an oil atomization nozzle assembly (4) and a sparking plug (5), whereinthe oil atomization end of the oil atomization nozzle assembly (4) and the ignition end of the sparking plug (5) are located at the lower end of the center piston (3). The air cylinder cover (1) is provided with piston cavities for installing the center pistons (3). The drive motor (2) is arranged on the air cylinder cover (1) and connected with the center pistons (3) through linkage components sothat the center pistons (3) can be driven to move up and down together, and the lower ends of the center pistons (3) can be embedded in or move out of the combustion chambers. According to the engine, the motor is used for conducting control to change the volume of the combustion chambers so that the compression ratio of the engine can be changed, the engine can work in a layering combustion manner, and the work efficiency of the engine is improved.

Description

technical field [0001] The invention relates to the technical field of automobile engines, in particular to a gasoline engine with adjustable compression ratio. The invention also relates to a motor vehicle provided with said variable compression ratio engine. Background technique [0002] The compression ratio is the ratio of the sum of the scavenging volume of the piston and the volume of the combustion chamber to the volume of the combustion chamber. Increasing the compression ratio can increase the cylinder pressure and efficiency, but it is easy to cause knocking of the engine, so at low load, it is hoped to improve combustion efficiency by increasing the compression ratio, while at high load, it is hoped to reduce the compression ratio to prevent knocking and Improve efficiency. [0003] The combustion chamber of a modern engine is determined by the physical structure formed by the cylinder head and the top of the piston. Regardless of the displacement of the engine,...

AI Technical Summary

Problems solved by technology

[0005] The current variable compression ratio technology is usually realized through variable combustion chamber volume and variable top dead center position. Changing the top dead center position often requires changing the crankshaft of the connecting rod and crankshaft to a four-bar linkage mechanism. At the same time, the control mechanism is added, and the other is to change the relative position of the cylinder head and the cylinder block to achieve variable combustion chamber volume, but this system brings a series of problems such as sealing, camshaft drive, lubrication and cooling.

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