Electric supercharging Miller cycle engine power system

Abstract

The invention discloses an electric supercharging Miller cycle engine power system which comprises a Miller cycle engine, a first generator, an electric supercharger, an air inlet bypass valve, an intercooler, a pressure sensor, a turbine generator, an exhaust bypass valve, a controller, a battery and a power output shaft. The electric supercharger is composed of a motor and a gas compressor, and the turbine generator is composed of a turbine and a second generator. According to the electric supercharging Miller cycle engine power system, the electric supercharging technology is adopted, and mechanical power and electric power can be output outwards at the same time. The system is simple in structure, few in mechanical parts and high in reliability; and control is flexible, system response is fast, and thermal efficiency is high.

Description

technical field [0001] The invention belongs to the technical fields of engines and electric motors, and relates to an electric supercharged Miller cycle engine power system. Background technique [0002] Supercharging refers to the compression of the gas entering the engine. The purpose is to increase the intake air volume of the engine without increasing the engine displacement, thereby increasing the power and torque of the engine. The commonly used boosting technologies for engines are turbocharging and supercharging. [0003] Turbocharging is a technology that uses the exhaust gas from the engine to impact the turbine to rotate it, and then drives the compressor to compress the intake air. The capacity of turbocharging is related to the amount of exhaust gas discharged from the engine. When the engine speed is low, the turbocharging capacity is insufficient. At the same time, there is also aerodynamic hysteresis in the turbocharger, which leads to a slow response of t...

AI Technical Summary

Problems solved by technology

However, the supercharger will affect the power output at high speed, and the efficiency is low

[0005] Existing supercharging technology cannot take into account the performance and thermal efficiency at low and high speeds at the same time. It is applicable to few working conditions, the efficiency is low under non-ideal working conditions, and the supercharging intensity cannot be flexibly adjusted.

These disadvantages make the traditional supercharging technology have some limitations in the scope of application and thermal efficiency

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