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A continuously variable compression ratio engine device and compression ratio conversion method

A variable compression ratio technology, applied in engine control, machines/engines, mechanical equipment, etc., can solve problems such as inability to achieve optimal performance and invariable engine compression ratio, so as to improve thermal efficiency, realize volume, and realize continuous reliability. change effect

Active Publication Date: 2020-04-21
ZHEJIANG FENGRUI ENGINE CO LTD
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Problems solved by technology

[0006] In order to solve the technical problem that the compression ratio of the existing engine is not variable or can only be changed in a simple step, but cannot achieve the best performance, the present invention provides a continuously variable compression ratio engine device and a compression ratio conversion method

Method used

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  • A continuously variable compression ratio engine device and compression ratio conversion method
  • A continuously variable compression ratio engine device and compression ratio conversion method

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Embodiment Construction

[0031] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0032] The mechanism that converts internal energy into kinetic energy is called an engine, and the form of an automobile engine is mainly an internal combustion engine with a cylinder and a piston as a conversion mechanism. According to the different fuel and ignition forms, it can be divided into gasoline engine or diesel engine, or there are engines fueled by hydrogen, natural gas, and petroleum gas, and the combustion form is less different from gasoline engines. According to the working cycle and piston stroke characteristics, it can be divided into two-stroke and four-stroke engines. Common automotive engines mainly include cylinders, pistons, piston connecting rods, crankshafts and other common components. Gasoline engine with in-cylinder direct injection ...

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Abstract

The invention provides a continuously variable compression ratio engine device and a compression ratio transformation method. On the basis of an original structure of an engine, a volume variable moving cavity is additionally formed, the volume of the moving cavity is continuously variable through the hydraulic transmission technology, and then the compression ratio of an air cylinder is continuously variable; and under different working condition needs, different compression ratios can be freely and flexibly matched, and then the heat efficiency of the engine and the motion performance of anautomobile are improved maximally.

Description

technical field [0001] The invention relates to the field of engines, in particular to a continuously variable compression ratio engine device and a compression ratio conversion method. Background technique [0002] At this stage, the engine is gradually moving toward a small-displacement supercharging trend; and in a supercharged engine, in order to prevent knocking, its compression ratio is lower than that of a naturally aspirated engine. Thermal efficiency decreases at low boost pressures, reducing fuel economy. Especially in a turbocharged engine, due to the slow rise of the boost degree, the torque rise is also very slow under low compression ratio conditions, forming the so-called boost lag phenomenon. Therefore, when the engine is at a low speed, the supercharging effect lags behind, and the supercharging system will not take effect until the engine accelerates to a certain speed, resulting in poor performance of the engine at low speeds. [0003] Generally, the com...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D15/04
CPCF02D15/04
Inventor 张淼孙道培杨万里王瑞平
Owner ZHEJIANG FENGRUI ENGINE CO LTD
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