Engine residual heat recovery system for equipment electromechanical coupling supercharger

Abstract

The invention discloses an engine residual heat recovery system for an equipment electromechanical coupling supercharger. The electromechanical coupling supercharger, a supercharger controller, a high-voltage battery, an ISG (Integrated Starter and Generator) and an ISG controller are connected in series to a same high-voltage bus, by means of control of an ECU (Electronic Control Unit), electricenergy is made to flow between all components through the high-voltage bus, the electromechanical coupling supercharger comprises a turbine supercharger and a motor-generator integrated to the turbinesupercharger, the turbine supercharger comprises a turbine machine and an air compressor, the turbine machine is connected to an air exhaust pipe of an engine, the air compressor conveys fresh air after compression to an air inlet total pipe of the engine through an intercooler in working, and the ISG is connected with the engine. Compared with the prior art, the engine residual heat recovery system for the equipment electromechanical coupling supercharger has the beneficial effects that the whole system does not require work involvement of third working media, thus a series of pipeline systems are omitted, the system is simple and comprises energy recovery and energy feedback functions, the heat efficiency of the engine can be improved, and the low speed torque and transient response capability of the engine are improved.

Description

technical field [0001] The invention belongs to the field of internal combustion engines and relates to an engine waste heat recovery system equipped with an electromechanical coupling supercharger. Background technique [0002] The internal combustion engine is a power machine that converts the chemical energy of the fuel into heat energy through the combustion of fuel inside the engine, and then converts the heat energy into mechanical energy through the crankshaft connecting rod mechanism. Among them, only part of the energy emitted by fuel combustion is converted into effective mechanical work for external output, and the rest is discharged from the engine in the form of waste heat of exhaust gas and waste heat of cooling water. At present, the highest effective thermal efficiency of a gasoline engine is about 35-40%, while that of a diesel engine is between 45-50%. For a gasoline engine, about 60-65% of the energy is taken away by the waste heat of the exhaust gas and t...

AI Technical Summary

Problems solved by technology

[0008] The above three schemes all adopt the organic Rankine cycle method to recover energy, and need to use the thermodynamic cycle of the third-party working medium to absorb the waste heat and do work, thus requiring a set of independent closed pipeline system, including evaporator, condenser, circulation pump , expander, etc., to work, resulting in complex system and low reliability

And it only includes the function of recovering energy, not including the function of how to use the recovered energy

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