Piston with variable oil cavity and engine with piston with variable oil cavity
A technology for engines and oil chambers, which is applied to engine components, machines/engines, pistons, etc. It can solve the problems of exacerbating the high temperature and high pressure environment of the engine, achieve the effect of improving performance and preventing overheating of compression work
Pending Publication Date: 2022-03-08
湖南江滨机器(集团)有限责任公司
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But at the same time, high-quality combustion performance will intensify the high-temperature and high-pressure environment of the engine, and it is necessary to stably realize the variable compression ratio of the engine under this premise
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[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0023] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0024] Reference manual attached figure 1 , with figure 1 The structural diagram of the variable oil chamber piston provided by the embodiment of the present invention includes: a variable oil chamber piston arrang...
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The variable oil cavity piston is arranged in the engine and comprises a piston top and a piston skirt, the piston top is arranged above the piston skirt, a spring is arranged between the piston top and the piston skirt, and the spring is in a compressed state after being assembled. Therefore, a certain fit clearance exists between the piston top and the piston skirt; the piston top part recess is matched with the piston part protrusion, an oil cavity is formed between the piston top part recess and the piston part protrusion, and the oil cavity is communicated with an oil pipe which is used for conveying cooling oil to the oil cavity. In the service state, the top face of the piston top is subjected to air pressure in an engine cylinder, inertia force of the piston top and elastic force generated by compression of a spring, the piston top and the piston skirt can move close to each other and away from each other relatively through interaction of the force, and therefore the volume of an oil cavity is changed, and the oil cavity is filled with oil. Finally, the variable compression ratio of the engine is achieved through the simple and stable variable oil cavity piston, and the performance of the engine is improved.
Description
technical field [0001] The invention relates to the technical field of engine equipment, in particular to a variable oil chamber piston and an engine with the variable oil chamber piston. Background technique [0002] Nowadays, the emission and reliability requirements of engines are becoming more and more stringent, and at the same time, the economy under the optimal configuration is pursued. High-quality combustion performance is an effective way to reduce engine emissions. Variable compression ratio engines can increase the dimension of adjusting the air-fuel ratio to achieve a wider range of optimal combustion conditions, thereby reducing fuel consumption and emissions. But at the same time, high-quality combustion performance will intensify the high-temperature and high-pressure environment of the engine, and it is necessary to stably realize the variable compression ratio of the engine under this premise. [0003] Therefore, how to provide a structure for stably reali...
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IPC IPC(8): F02F3/00F02F3/22F02B75/04
CPCF02F3/0023F02F3/22F02B75/044
Inventor 赵喆黄祖东代凌峰谭清雅余中荣胡忆明
Owner 湖南江滨机器(集团)有限责任公司