Variable intake air filter structure

Abstract

The invention discloses a variable intake air filter structure which comprises a main body, a filter element fixing seat, a filter element and a lid. A high-speed air intake pipe and a low-speed air intake pipe are connected to the outer side of the main body; a variable air intake element is arranged on the high-speed air intake pipe; the lid is covered on the main body and an air inlet for external air to go into the main body is arranged on the outer side of the lid; the interior of the main body is divided into a high-speed air inlet passage and a low-speed air inlet passage by a clapboard; the filter element fixing seat is fixed on the main body and is provided with a shielding part and a penetration port; the shielding part can rightly shield the low-speed air inlet passage of the main body; a plurality of locking columns are arranged at the outer edge of the penetration port; the filter element is provided with a filtering part which corresponds to the penetration port of the filter element fixing seat; and a plurality of locking holes are arranged in the outer circumference of the filtering part. In such way, the filter element is locked and fixed on the filter element fixing seat, so a mechanism used for fixing is unnecessary to be arranged on the low-speed air inlet passage, and thereby the air intake smoothness of the low-speed air inlet passage can not be influenced.

Description

【Technical field】 [0001] The present invention relates to a structure of a variable intake air filter, especially to avoid setting a fixed mechanism on the low-speed intake passage, which affects the smoothness of the intake air in the low-speed intake passage, thereby improving the performance of the engine. Variable intake air filter construction for performance at low speeds. 【Background technique】 [0002] In the engine design of a general scooter motorcycle, the design of the intake pipeline and the mutual cooperation between the engine are extremely important. For example, when the engine is at a slow or low speed, the required cross-sectional area of ​​the intake pipeline is relatively small Small size and long length can help to increase the gas flow velocity in the intake pipe, and thus enhance the inertial effect and pulsation effect, thereby improving the intake efficiency and increasing the engine torque; on the contrary, when the engine is running at a fast or h...

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Problems solved by technology

[0003] However, for the design of the air intake pipeline of the general scooter motorcycle engine at present, please refer to figure 1 , 2 As shown, it is mainly to arrange an intake manifold 13 between the air filter 1 of the motorcycle and the intake variable member 12 (which can be a carburetor or a throttle body), and the intake manifold 13 The front end is provided with a throttle body 14, because the cross-sectional area and length of the intake manifold 13 are all fixed, when the engine runs to generate negative pressure suction, the intake manifold 13 can only meet the requirements of lower speed or higher speed. One of the air intake requirements at high speeds cannot meet the air intake efficiency requirements of the global speed, which will result in the lack of simultaneous performance of lower speeds and higher speeds

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