Auxiliary combustion-engine type pressurization system for restoring plateau power of internal-combustion engine

Abstract

The invention provides an auxiliary combustion-engine type pressurization system for restoring the plateau power of an internal-combustion engine, and belongs to the technical field of thermal power engines. The auxiliary combustion-engine type pressurization system mainly comprises an auxiliary air cleaner, an auxiliary pressurization air compressor, an auxiliary burning air compressor, an auxiliary turbine, a combustion chamber, an electromagnetic valve oil injection device, an ignition device, a switching valve and the like. When the internal-combustion engine runs in a place with a high altitude, the auxiliary pressurization system is arranged so as to restore the power of the internal-combustion engine by a main pressurizer and the auxiliary pressurization system; when the internal-combustion engine runs in a place with a low altitude, the main pressurizer and the internal-combustion engine are matched normally to work only. The auxiliary pressurization system can be dismantled freely, so that aims of simplifying the cabin arrangement of the engine, enhancing the running reliability and making the structure simple and compact can be fulfilled.

Description

technical field [0001] The invention relates to a gas-fired auxiliary supercharging system for recovering plateau power of an internal-combustion engine, which belongs to the technical field of heat engines. Background technique [0002] The use of exhaust gas turbocharging technology is currently one of the most effective methods to restore the plateau power of the internal combustion engine. Ordinary single-stage turbocharging systems can restore the power of the internal combustion engine within a certain range of altitudes. This is because, when the altitude increases, due to the decrease of the exhaust back pressure, the expansion ratio of the turbine and the temperature of the exhaust gas before the turbine both increase, and the increase of the gas energy at the inlet of the turbine leads to an increase of the output work of the turbine, thereby increasing the speed of the turbocharger , so that the compressor will form a higher boost pressure, and the pressure ratio...

AI Technical Summary

Problems solved by technology

However, this supercharger system needs to arrange two superchargers in structure, as well as the adjustment mechanism and connecting pipelines between them, which not only requires great changes to the original internal combustion engine structure, but also increases the limited space. The difficulty of compact arrangement of internal components; in addition, for internal combustion engines using a two-stage supercharger system, the two-stage superchargers in the supercharger system must be put into operation at the same time at any altitude, and there must be a certain real-time adjustment strategy to control each stage. The operation of the supercharger, which undoubtedly increases the complexity of the operation of the internal combustion engine in low-altitude areas or when only a single-stage supercharger is required to meet the supercharging requirements of the internal combustion engine

More importantly, the matching parameters of the two-stage supercharging system for recovering power at high altitudes and the matching parameters of the supercharging system for the purpose of improving work performance on plains are completely different, and it is difficult to balance them

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