Engine and supercharging system thereof

Abstract

The invention discloses an engine and a supercharging system thereof. The supercharging system of the engine comprises an air inlet pipeline, an exhaust pipeline, a bypass pipeline and a bypass valve,wherein the air inlet pipeline is connected with an air compressor and an engine body; the exhaust pipeline is connected with the engine body and a turbine; an air inlet end of the bypass pipeline isconnected with the air inlet pipeline, and an air outlet end is connected with the exhaust pipeline; and the bypass valve is arranged on the bypass pipeline and controls the ventilation capacity of the bypass pipeline. According to the engine and the supercharging system thereof, the bypass valve is properly opened at a certain opening according to requirements under the appropriate working condition, supercharged intake air is bypassed to an exhaust side under the action of differential pressure, and the flow and energy of exhausted air are increased after being bypassed, so that the outputpower of the turbine is increased; and due to increase of surge margin of the engine and increase of the air-fuel ratio, the fuel injection quantity can be increased by the engine to obtain higher torque output, the surge problem of a supercharger cannot be caused, and the reliability of the supercharger is improved.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to a supercharging system of an engine. The invention also relates to an engine comprising the above-described supercharging system. Background technique [0002] The intake bypass technology is to connect a bypass pipe from the downstream of the compressor intake of the supercharger to the upstream of the exhaust of the turbine, and add the corresponding heating device and electronically controlled valve, so as to bypass the intake air to the exhaust gas and carry out the process. heating purpose. [0003] However, the purpose of heating the bypassed intake air is to provide more energy to the turbine. However, in practical applications, many working conditions will cause the problem of overheating of the turbine, which is very unfavorable for the reliability of the supercharger, which in turn leads to increased reducer reliability. [0004] Therefore, how to improve the reliabi...

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Problems solved by technology

[0003] However, the purpose of heating the bypass intake air is to provide more energy to the turbine, but in actual application, many working conditions will cause the problem of overheating of the turbine, which is very detrimental to the reliability of the turbocharger, which in turn leads to increased Reduced reliability of the compressor

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