Pumping loss adjusting system

Abstract

The invention provides a pumping loss adjusting system, and belongs to the technical field of internal combustion engines. The pumping loss adjusting system comprises an engine air feeding tube, a supercharger, an engine, an engine exhaust tube, a turbine, a connecting tube, an adjusting cavity, a rotating shaft, a rotating plate, a control cavity, an internal tube, a spring, a rotating body and a stress plate, wherein the adjusting cavity is coaxially connected with the control cavity through the rotating shaft; the stress plate is connected with a left wall surface of a fixed body through the spring; one end of a second connecting tube is connected with an internal cavity body of the control cavity; and the other end of the second connecting tube is connected with the engine exhaust tube between the turbine and a catalyzing pack. In the pumping loss adjusting system, when the engine runs under the working condition of high speed, the front exhaust volume of the turbine is large, pumping loss is low, and oil consumption is low; and when the engine runs under the working condition of low speed, the front exhaust volume of the turbine is small, pulse energy can be used sufficiently, and the oil consumption is low. The pumping loss adjusting system is reasonable in design and simple in structure, and is suitable for the optimization 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 pumping loss adjustment system capable of self-adjusting 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 of each cylinder,...

AI Technical Summary

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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