Single-vortex double-air compressor turbine pressurizing system with air escape valves

Abstract

The invention relates to a single-vortex double-air compressor turbine pressurizing system with air escape valves and belongs to the technical field of internal combustion engines. The single-vortex double-air compressor turbine pressurizing system with the air escape valves comprises air inlet pipes, an engine, air outlet pipes, a turbine, a first air compressor, a second air compressor and control valves, wherein the first control valve is arranged on the air inlet pipe of the first air compressor; the second control valve is arranged on the air inlet pipe of the second air compressor; the third control valve is arranged on a connecting pipe; the fourth control valve is arranged on the air outlet pipe of the first air compressor; the fifth control valve is arranged on the air outlet pipe of the second air compressor; an air compressor rear air escape valve is arranged on an air compressor rear air escape pipe; a turbine front air escape valve is arranged on a turbine front air escape pipe; and a low-pressure control valve is arranged on a low-pressure connecting pipe. Three working modes of a single air compressor, double air compressors connected in parallel and double air compressors connected in series can be realized by adjusting the opening and closing of different control valves, and air inlet air escape, air outlet air escape and air outlet recirculation in the three working modes are realized. The single-vortex double-air compressor turbine pressurizing system with the air escape valves has a reasonable design and a simple control strategy and is applicable to turbine pressurizing systems with various cylinder numbers.

Description

technical field [0001] The invention relates to a turbocharging system in the field of internal combustion engines, in particular to a single-scroll dual-pressure turbocharging system with a blow-off valve that can realize compressors working in series and parallel. 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, the compressor can only...

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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 200510025774.0, and the patent name is: large and small turbocharged series-parallel adjustable booster system. , sequential turbocharging and two-stage turbocharging, so that the range of the equivalent flow area of ​​the turbine is wider; but the flow range of the compressor is limited

Chinese patent application number 200710144757.8, patent name: adjustable sequential load turbocharging system, in the specific implementation of this patented technology, a single turbocharging, two parallel turbocharging, intake and exhaust bypassing are realized through the bypass method Turbocharging, high working condition bleed turbocharging, expands the operating range of the turbocharged diesel engine and improves the performance of the turbocharged diesel engine in the full range of working conditions; but this invention cannot adjust the relationship between the turbine and the compressor matching relationship

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