Variable compression ratio mechanism for self-control adjustment gasoline engine

Abstract

The invention discloses a variable compression ratio mechanism for self-control adjustment of a gasoline engine, comprising: worm shafts mounted on both sides of a cylinder cover lower shell and driven by a motor to rotate; the gear turbine set is provided with a straight tooth gear located on the upper portion and a turbine located on the lower portion, and the turbine is connected with the worm shaft in a meshed mode; the gear thread group is provided with a gear end located at the upper part and an external thread end located at the lower part, the gear end is in meshed connection with the straight tooth gear, and the external thread end is in threaded connection with the internal thread of the cylinder cover; the variable valve set is provided with a valve rod and a valve base which are connected through internal and external threads and can be installed in the gear thread set in the mode of moving in the axial direction of the gear thread set. The ECU indicates the motor to drive the worm shaft to rotate in a fixed-axis mode, the gear turbine set is driven to rotate, the gear thread set and the variable valve set are forced to move axially, the volume of the combustion chamber is changed, the compression ratio of the combustion chamber is adjusted, the knocking phenomenon is avoided, the fuel economy and the dynamic property are improved, and all parts are convenient to machine.

Description

technical field [0001] The invention belongs to the technical field of engines, and in particular relates to a variable compression ratio mechanism for self-controlling gasoline engines. Background technique [0002] The internal combustion engine is a device that converts the chemical energy of the fuel into mechanical energy. During operation, the piston reciprocates under the combined action of the pressure and the crankshaft connecting rod. When the piston moves to the top dead center, the volume between the top of the piston and the cylinder head is used for combustion. The volume of the chamber; the volume swept by the piston from the top dead center to the bottom dead center is called the working volume; when the piston moves to the bottom dead center, the space between the top of the piston and the combustion chamber is the total space volume. The piston moves from the bottom dead center to the top dead center, and the degree to which the cylinder gas is compressed i...

AI Technical Summary

Problems solved by technology

The current variable compression ratio mechanical structure is difficult and difficult to maintain

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