Before-the-turbine fluid self-control unit

Abstract

The invention belongs to the technical field of internal combustion engines and relates to a before-the-turbine fluid self-control unit comprising an engine intake pipe, a turbocharger, an engine, an engine exhaust pipe, a turbine, connecting pipes, an adjusting cavity, a rotating shaft, a rotating plate, a control cavity, internal pipes, a spring and a rotator. The adjusting cavity and the control cavity are coaxially connected through the rotating shaft. The upper wall face of the second internal pipe is connected to a partition through the spring. One end of the second connecting pipe is communicated with an inner cavity of the control cavity. The other end of the second connecting pipe is connected to the engine exhaust pipe arranged between the turbine and a catalyst capsule. When the engine runs at high speed, volume of before-the-turbine displacement is high, pumping loss is low, and oil consumption is low; when the engine runs at low speed, volume of before-the-turbine displacement is low, pulse energy can be made full use, and oil consumption is low. The before-the-turbine fluid self-control unit is reasonable in design and simple in structure and is applicable to optimal design of an exhaust system of a turbocharged engine.

Description

technical field [0001] The invention belongs to the technical field of internal combustion engines, and specifically relates to a swirl prefluid self-control device capable of realizing self-regulation of the volume of an exhaust pipe of a supercharged engine. Background technique [0002] The turbocharging system mainly includes a pulse supercharging system and a constant pressure supercharging system. In the constant-pressure supercharging system, each cylinder shares a large-volume exhaust pipe. The structure of the exhaust pipe system is relatively simple. The pressure in the exhaust pipe is basically kept constant, and the pressure is only related to the load and speed of the engine. The constant pressure supercharging system has less pumping loss, higher turbine efficiency and better performance under high-speed conditions; however, it cannot fully utilize the exhaust pulse energy under low-speed conditions. Pulse supercharging system, according to the firing sequence...

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Problems solved by technology

[0003] After searching the existing literature, it is found that the patent application number is 200810203032.6, which is called the patented technology of the turbocharger device that uses the rotation of the partition to adjust the volume of the exhaust pipe. It provides a continuous variable volume of the exhaust pipe by using a rotating plate. technology, but its rotation needs to be done manually, and it cannot achieve self-rotation

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