Engine boost method

Abstract

The invention discloses an engine supercharging method. An electric supercharger formed by a motor, a gas compressor, a transmission mechanism, a controller, a motor rotation speed sensor, a gas pressure sensor and the like is added in front of an engine air filter. The method comprises setting motor initial rotation speed according to required pressure and gas compressor characteristics; acquiring real-time acquired gas outlet pressure of the gas compressor during the operation and adjusting motor rotation speed according to gas outlet pressure in real time to form closed-loop control and keeping the gas outlet pressure stable. By the aid of the method, the electric supercharger is added, so that the problems of reduction of engine / generator power and impact load capacity caused by insufficient air inlet in the condition of highland low pressure are solved, the motor is not affected by the gas pressure, the output power can be recovered to the plain level, and the method is unsurpassable compared with outer mechanical supercharging methods.

Description

technical field [0001] The invention relates to an engine supercharging technology, in particular to an engine supercharging method and a supercharging device. Background technique [0002] Engine / generator sets rely on burning fuel to convert chemical energy into mechanical / electrical energy. In the case of high altitude and low air pressure, insufficient air intake leads to insufficient oxygen and insufficient working medium during combustion, which deteriorates the combustion conditions and reduces the output power of the engine / generator set a lot, affecting normal use. [0003] At present, the superchargers used in engines mainly include mechanical superchargers and exhaust gas turbochargers. The supercharger is driven by the engine through the transmission mechanism to increase the intake pressure. The exhaust gas turbocharger uses the energy of the engine exhaust to drive the turbine and its coaxially installed compressor to rotate and do work, increasing the air de...

AI Technical Summary

Problems solved by technology

The disadvantages of the supercharger are: 1. It is connected with the fixed transmission ratio of the engine. The supercharging effect changes with the engine speed. The intake pressure decreases with the decrease of atmospheric pressure; 2. When not needed, the connection cannot be disconnected to reduce the power loss of the engine; 3. It needs to occupy a certain amount of engine power output interface and is limited by the power of the output interface; 4. The connection with the engine The transmission mechanism and gas path connections are complex

[0004] The disadvantages of the exhaust gas turbocharger are: 1. Only when the load is heavy, there is enough exhaust energy to drive the compressor to do work; 2. It cannot completely overcome the power drop caused by high altitude; 3. Due to the exhaust gas turbine— There is a moment of inertia in the compressor, coupled with the speed limitation of the intake and exhaust flow, there is a delay in responding to sudden loads

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