Supercharger capable of changing compression ratio, application of supercharger and engine regulation technology

Abstract

The invention discloses a supercharger capable of changing the compression ratio. The supercharger comprises a gas inlet pipe, an exhaust pipe, a shell, a first rotor, a second rotor, a gear set and abelt pulley; and meanwhile, the invention discloses an engine compression ratio regulation technology, and the engine compression ratio regulation technology comprises the following specific regulation steps that S1, an exhaust port of the exhaust pipe is connected to an engine gas inlet in series; S2, a gas inlet baffle or/and a gas outlet baffle is/are adjusted to pre-compress gas entering an engine air cylinder; and S3, the gas inlet baffle or/and the gas outlet baffle is/are readjusted, and thus the pressure of the gas entering the engine air cylinder is different from the pressure of thegas entering the engine air cylinder in the step S2 so as to regulate the engine compression ratio. According to the supercharger capable of changing the compression ratio, application of the supercharger to an engine and a regulation method, the engine compression ratio is changed by adjusting the gas inlet pre-compression ratio under the situation of not changing the engine structure, and engine performance is improved in a low-cost mode.

Description

technical field [0001] The invention relates to the technical field of automobile engines, in particular to a variable compression ratio supercharger and its application on an engine and a regulation method for the engine compression ratio. Background technique [0002] In order to adapt to the development trend of energy conservation and emission reduction, it has become the consensus and goal of the internal combustion engine automobile industry to obtain greater output power with a smaller engine displacement, and automobile engines with supercharging and turbocharging have been widely used. [0003] At present, the "three-lobed" Roots supercharger is the main mechanical supercharger for automobile engines, which has disadvantages: ①The air inlet and exhaust port of the supercharger are always open when the supercharger is working, and cannot be adjusted by changing the opening degree. Adjust the suction and exhaust volume and compression ratio, especially at the exhaust ...

AI Technical Summary

Problems solved by technology

[0003] At present, the "three-lobed" Roots supercharger is the main mechanical supercharger for automobile engines, which has disadvantages: ①The air inlet and exhaust port of the supercharger are always open when the supercharger is working, and cannot be adjusted by changing the opening degree. Adjust the suction and exhaust volume and compression ratio, especially at the exhaust port where the gas backflow impact is large and the noise is large; ②The gap between the supercharger shell and the rotor and the rotor is sealed, the gap sealing distance is short, and the sealing effect is not good, especially at low speeds The leakage of compressed gas backflow is serious, which reduces the efficiency of the supercharger; ③The most important thing is that the Roots supercharger has no internal compression function, and the useless power consumption is large and the temperature rises

However, the current variable compression ratio engine needs to change the engine structure, increase the control mechanism, change the piston stroke or the cylinder head position to change the cylinder volume, and complete the compression and compression ratio adjustment inside the cylinder, resulting in more complicated engine structure and operation control, and lower production costs. higher

[0005] In order to solve the above problems, it is urgent to invent a variable compression ratio supercharger and its application and engine compression ratio control technology to solve the current problems of variable compression ratio engines with complex structure and operation and high production costs

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