Double-turbine double-air-compressor turbocharging system

Abstract

A double-turbine double-air-compressor turbocharging system belongs to the technical field of combustion engines and comprises an air inlet pipe, an air inlet main pipe, an engine, an air exhaust main pipe, an air exhaust pipe, a first air compressor, a second air compressor, a first turbine, a second turbine, connection shafts, a connection pipe and control valves. The first air compressor, the second air compressor, the first turbine and the second turbine are in coaxial connection through the connection shafts. The control valves are respectively arranged on an air compressor air inlet pipe, an air compressor air outlet pipe, an air compressor connection pipe, a turbine air inlet pipe, a turbine air outlet pipe and a turbine connection pipe. By adjusting opening and closing of different control valves, three working modes of the air compressors, namely a single air compressor, double air compressors in parallel and double air compressors in series can be achieved; and three working modes of the turbines, namely a single turbine, double turbines in parallel and double turbines in series can be achieved. The double-turbine double-air-compressor turbocharging system is reasonable in design, simple in control strategy and suitable for turbocharging systems with various cylinder numbers.

Description

technical field [0001] The invention relates to a turbocharger system in the field of internal combustion engines, in particular to a twin-scroll double-pressure turbocharger system capable of realizing serial-parallel connection of compressors and series-parallel connection of turbines. Background technique [0002] In the face of increasingly severe environmental and energy crises, increasing power density, reducing fuel consumption and reducing emissions have become the main directions for the development of internal combustion engines. Turbocharging is not only the most effective way to strengthen the internal combustion engine, but also achieves the purpose of reducing fuel consumption and reducing emissions at the same time, which has become an indispensable technical means of modern internal combustion engine technology. However, due to the influence of the flow characteristics of the turbocharger compressor, for the traditional single-scroll single-pressure system, t...

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Problems solved by technology

[0003] After searching the existing technical literature, it is found that the Chinese patent application number is 200710144757.8, and the patent name is: adjustable successive load turbocharging system. Parallel turbocharging, intake and exhaust bypass turbocharging, and high-condition exhaust turbocharging expand the operating range of the turbocharged diesel engine and improve the performance of the turbocharged diesel engine in the full range of working conditions; but this invention Unable to adjust the matching relationship between turbine and compressor

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