Air inlet pipeline system of supercharged engine and air inlet by-pass valve

Abstract

The invention provides an air inlet pipeline system of a supercharged engine. The air inlet pipeline system comprises an air filter, a supercharger, an intercooler and an air inlet manifold, wherein the air filter is connected with the supercharger through an air filter outlet pipe, the supercharger is connected with the intercooler, and an intercooler outlet pipe is connected with the air inlet manifold through a throttle valve. According to the improvement, an air inlet by-pass valve is connected between the air filter outlet pipe and the air inlet manifold in front of the throttle valve, the air inlet by-pass valve is connected with the air inlet manifold through a by-pass valve pressure pipe, opening and closing of the air inlet by-pass valve are regulated through pressure in the air inlet manifold, so that direct communication or disconnection between the air filter outlet pipe and the air inlet manifold in front of the throttle valve is achieved. The air inlet pipeline system can solve the problems that when torque of the engine is small, the air inlet pipeline is long, air inlet resistance is large and response speed of the engine is low, and improves fuel oil economical efficiency of the small-displacement supercharged engine.

Description

technical field [0001] The invention belongs to supercharged engine technology, in particular to an intake pipeline system of a supercharged engine. Background technique [0002] With the development of engine technology, gasoline engine supercharging technology has developed rapidly. In order to improve the power and torque of small-displacement engines, improve fuel economy and reduce exhaust emissions, and make engines smaller and lighter, the use of supercharging technology has become more and more common. [0003] Now the engine adopts supercharging technology, the temperature of the intake air compressed by the supercharger is relatively high. In order to make it burn stably, the compressed gas needs to be cooled, which is called supercharging and intercooling, and then passes through the intake manifold. tube into the engine. In actual use, when the engine speed is small, that is, when a small torque is required, it is usually not necessary to boost the intake air, ...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the above deficiencies existing in the existing supercharged engine, and provides an improved intake pipeline system of the supercharged engine, and provides an intake bypass valve suitable for the system, so as to solve the problem that the intake pipeline is relatively tight when the torque of the engine is small. Long, it creates resistance to the air intake, which leads to the problem of slow response of the engine, and improves the fuel economy of the small-displacement supercharged engine

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