Electric auxiliary engaging and disengaging type power turbine composite supercharger

Abstract

The invention relates to an electric auxiliary engaging and disengaging type power turbine composite supercharger, and belongs to the field of vehicle motive power machines. According to a motor external scheme, a motor dynamo acts as an auxiliary motor to be arranged outside the supercharger, motor energy is transmitted to a rotor shaft of the supercharger through a gear box, and an engaging anddisengaging device can be controlled to engage the gear box with the rotor shaft and disengage the gear box from the rotor shaft according to different working conditions; and under a high-speed working condition of the motor dynamo, surplus energy of the rotor shaft can drive the motor dynamo to generate electricity through the gear box. With such motor external scheme, the influence on an electronic component of the motor dynamo by high temperature is avoided effectively, and efficient distribution and utilization of energy of the supercharger is realized; and the turbine end of the supercharger is connected with a power turbine in series, and secondary exhaust gas subjected to work by a turbine of the supercharger drives the power turbine, so that the motor dynamo is driven to generateelectricity for energy storage, the utilization ratio of energy of the exhaust gas is raised, and the economy of the motor dynamo is improved.

Description

technical field [0001] The invention belongs to the field of vehicle power machinery, and in particular relates to an electrically assisted clutch type power turbo compound supercharger. Background technique [0002] Nowadays, turbochargers are more and more widely used in engines. From the perspective of structure and working principle, turbochargers are small air compressors. The turbocharger uses the exhaust gas energy emitted by the engine to drive the turbine to rotate, thereby driving the coaxial compressor end impeller to rotate, bringing more air into the cylinder, increasing the air density in the engine and the mixing ratio of air and fuel, thus Increase engine output power, improve combustion, and achieve the purpose of strengthening the engine. However, there are still some problems with turbocharged engines. Under the condition of low engine speed, the exhaust energy is less, the turbine speed is low, the boost pressure is low, and the air supply volume lags b...

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Problems solved by technology

[0005] In order to solve the problems of "turbo hysteresis" existing in the turbocharger driven by exhaust gas, the displacement of the turbocharger cannot be ideally matched with the engine under all working conditions, and the low utilization rate of the exhaust gas energy of the second stage, the present invention proposes a An external motor scheme is designed, and an electric auxiliary turbocharger with a motor generator, a clutch device and a power turbine is designed

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