Engine intake system with variable-volume intake pipe

Abstract

An engine intake system with a variable-volume intake pipe belongs to the technical field of internal-combustion engines and comprises an air compressor, a turbine, an engine, a volume cavity, a movable plate, retaining rings and an elastic component. The cross section of the volume cavity is rectangular, an air outlet of an escape pipe of the air compressor is communicated with the upper wall surface of the volume cavity, an air inlet of an intake pipe of the engine is communicated with the lower wall surface of the volume cavity, all the retaining rings are mounted in the volume cavity, the movable plate is mounted among the retaining rings and the wall surface of the volume cavity and hermetically contacts with the inner wall surface of the volume cavity, and the movable plate is connected with the wall surface of the volume cavity through the elastic component. During operation of the engine, the movable plate is capable of moving left and right in the volume cavity. Under a low-speed working condition, the overall volume of a rear intake pipe of the air compressor is decreased, intake pressure is increased, and the charge efficiency of the engine is high. Under a high-speed working condition, the overall volume of the rear intake pipe of the air compressor is increased, the intake pressure is decreased, and the blasting pressure of the engine is reduced. The engine intake system is reasonable in design, simple in structure and applicable to turbocharging systems for engines.

Description

technical field [0001] The invention relates to an intake system in the field of internal combustion engines, in particular to an engine intake system with a variable volume of an intake pipe of a supercharged engine. Background technique [0002] With the development of modern society, people have higher and higher requirements on the power and economy of the engine. In the case of a certain displacement, the most effective way to increase the output power of the engine is to provide more fuel for combustion. It is easy to provide more fuel to the cylinder through the injector, but it is not so easy to provide the amount of air to match the increased amount of fuel at the same time; The effect is poor. When the fuel injection volume is constant and the cylinder air intake volume is large, the combustion is better, and the fuel consumption and emissions are lower. The traditional naturally aspirated engine completely relies on the vacuum formed in the cylinder to inhale a...

AI Technical Summary

Problems solved by technology

However, the existing turbocharging systems cannot take into account the high and low speed conditions of the engine well.

[0003] After searching the existing technical literature, it is found that Chinese patent number ZL200410050996.3, patent name: a variable modular pulse conversion supercharging device for a turbocharged diesel engine, this patent technology provides an exhaust pipe in the exhaust pipe The device with continuously variable volume can better take into account the high and low speed conditions of the engine; but the change of the exhaust volume in the exhaust pipe is realized by moving the moving rod up and down, which requires adding a special The control mechanism is used to control the movement of the moving rod, so that the structure of the booster system becomes more complicated, and the sealing of the exhaust pipe system is also poor under high temperature conditions

Images