Volume control system for air inlet pipe of naturally aspirated engine

Abstract

The invention relates to the technical field of mechanical design, in particular to a volume control system for an air inlet pipe of a naturally aspirated engine. The volume control system comprises an adjusting body, a rotating shaft, a rotating body, a stretching body, centrifugal bodies, balls, a pull rod, a moving body and springs. The adjusting body is arranged on the front portion of an exhaust manifold, and the rotating shaft and the rotating body are fixedly connected together. The stretching body and the centrifugal bodies are both arranged in the rotating body. The balls are embedded onto the stretching body. One side walls of the centrifugal bodies make contact with the stretching body through the balls; the other side walls of the centrifugal bodies are connected with the inner wall face of the rotating body through the first springs; and the top of the stretching body is connected with the inner wall face of the rotating body through the second spring. The rotating shaft is connected with an engine crankshaft through a chain. When the rotating speed of the engine is high, the moving body moves upwards, and the volume of an air inlet pipeline is decreased; and when the rotating speed of the engine is low, the moving body moves downwards, and the volume of the air inlet pipeline is increased. The volume control system is reasonable in design, simple in structure, and suitable for optimal design of variable air inlet pipe systems.

Description

technical field [0001] The invention relates to a volume control system of an intake pipe of a naturally aspirated engine in the technical field of mechanical design, in particular to a volume control system of an intake pipe of a naturally aspirated engine suitable for a system with variable intake pipe volume. Background technique [0002] Present engines can be divided into naturally aspirated and supercharged, and supercharged can be divided into mechanical supercharging, turbocharging and the latest air wave supercharging. The naturally aspirated type does not have a supercharger, which means that the air simply passes through the air filter, throttle valve, and intake manifold to reach the cylinder, and gasoline is directly injected into the intake manifold through the fuel injector. Taking a four-cylinder engine as an example, a piston has four strokes for one work: down (the intake valve opens, there is a pressure difference, and the mixture of air and fuel enters th...

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Problems solved by technology

[0003] After searching the existing literature, it is found that the patent application number is 20142022823.6, and the patent technology named variable intake manifold for small displacement engines provides a two-stage variable exhaust pipe volume technology, but it cannot Continuously variable reality

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