A fuel pulsation buffer and an oil circuit connection structure using the buffer
A connection structure and buffer technology, which is applied to engine components, machines/engines, fuel injection devices, etc., can solve the problems of prominent injector noise and affect the NVH performance of automobiles, and achieve the goal of reducing interior noise and improving NVH performance Effect
Active Publication Date: 2015-10-28
CHERY AUTOMOBILE CO LTD
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Problems solved by technology
[0002] The noise of the fuel injector of the gasoline engine is relatively prominent. Due to the limitation of the structure of the fuel injector itself and the installation space, it is difficult to make major changes to the fuel injector, but the noise will pass through the fuel rail connected to the fuel injector and The fuel supply pipeline is transmitted to the car, which affects the NVH performance of the car
Method used
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Embodiment 1
[0017] like figure 1 As shown, the fuel pulsation buffer of this embodiment includes a hollow casing 3 with connecting pipes 1 and 2 at both ends, and the inside of the casing 3 is divided into a first cavity 5 and a second cavity 6 by a diaphragm 4 , the first cavity 5 communicates with the connecting pipe 2, and the second cavity 6 communicates with the connecting pipe 1; the central position of the diaphragm 4 is a double-layer diaphragm structure, and the airtight space between the double-layer diaphragms can be formed at any time. The pressure in the first cavity changes and automatically changes the volume of the elastic mold cavity 7; The oil holes 8 communicate with each other.
[0018] The outer edges of the connecting pipes 1 and 2 are provided with annular protrusions 9 to facilitate the connection and fixing of the connecting pipes 1 and 2.
[0019] like figure 2 As shown, the oil circuit connection structure of this embodiment includes a fuel pipe 10, a serpen...
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The invention provides a fuel pulsation damper and an oil circuit connecting structure with the same to reduce influences of a fuel injector on NVH performance of an automobile and to improve the comfort level. The fuel pulsation damper comprises a hollow shell, wherein connecting pipes are arranged at the two ends of the hollow shell, the shell is separated into a first cavity and a second cavity through a membrane, each cavity is communicated with the connecting pipe on the corresponding side, the first cavity is communicated with the second cavity through an oil through hole in the membrane, an elastic membrane cavity is arranged in the first cavity, and the size of the elastic membrane cavity can be automatically changed along with changes of pressure in the first cavity. The fuel pulsation damper is connected between a fuel delivery pipeline and an oil rail in series, impact vibration caused by opening and closing of a valve when the fuel injector operates can be well isolated from an automobile body, meanwhile pressure fluctuation in the oil rail can be greatly weakened, pressure fluctuation of fuel in the oil rail is prevented from being transmitted into the automobile through the fuel pipeline when the fuel injector operates, thus noise in the automobile is greatly reduced, and the NVH performance of the automobile is improved.
Description
technical field [0001] The invention relates to a fuel pulsation buffer on an internal combustion engine and an oil circuit connection structure using the buffer. Background technique [0002] The noise of the fuel injector of the gasoline engine is relatively prominent. Due to the limitation of the structure of the fuel injector itself and the installation space, it is difficult to make major changes to the fuel injector, but the noise will pass through the fuel rail connected to the fuel injector and The fuel supply line is transmitted to the interior of the car, affecting the NVH performance of the car. Contents of the invention [0003] The object of the present invention is to propose a fuel pulsation buffer and an oil circuit connection structure using the buffer, so as to reduce the influence of the fuel injector on the NVH performance of the automobile and improve comfort. [0004] The fuel pulsation buffer of the present invention comprises a hollow shell with c...
Claims
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IPC IPC(8): F02M55/00
Inventor 钱道新陈春来靳发云郭丰刘文强
Owner CHERY AUTOMOBILE CO LTD