Gas path optimization control system for electrically assisted turbocharged diesel engine

Abstract

An electric auxiliary turbocharged diesel engine gas path optimization control system belongs to the technical field of diesel engine electronic control. The purpose of the present invention is to optimize the control system for the electric auxiliary turbocharged diesel engine gas circuit with multiple actuators, multiple control targets and constraint difficulties. The invention establishes the modules of oil circuit, gas circuit sensor and oil circuit controller, and is oriented to the third-order model of the gas circuit of the electric-assisted turbocharged diesel engine for multi-objective gas circuit tracking control, and designs the gas circuit tracking controller based on NMPC in the lower layer, and then designs Upper optimization controller. The invention faces the multi-objective requirements of the electric-assisted turbocharged air circuit control system, realizes precise tracking control of multiple air circuit states and optimized management of energy transfer in the system, thereby improving the comprehensive performance of the electrically-assisted turbocharged diesel engine.

Description

technical field [0001] The invention belongs to the technical field of diesel engine electronic control. Background technique [0002] The gas circuit system of a turbocharged diesel engine is mainly composed of six parts: cylinder, exhaust manifold, exhaust gas recirculation (Exhaust Gas Recirculation, EGR), variable geometry turbo (Variable Geometry Turbo, VGT), compressor and intake manifold. Part of the high-temperature and high-pressure exhaust gas discharged from the engine passes through the exhaust manifold and EGR, and flows back into the cylinder to participate in combustion. The other part of the exhaust gas flows to the turbine to drive the coaxially connected compressor to compress the air entering the cylinder. Air density, thereby increasing the output power of the engine. The gas circuit control technology of turbocharged diesel engine can effectively improve engine power, fuel economy and emission, and is a research hotspot in the field of engine electronic...

AI Technical Summary

Problems solved by technology

The control strategy of this patent is a rule-based control method. In the case of multi-objective requirements, the optimal control of the gas circuit system cannot be guaranteed. At the same time, the invention does not consider the key actuator EGR in the gas circuit control system, which expands the control dimension and requires a large number of calibrations. Work

[0007] To sum up, the currently published electric-assisted turbocharged diesel engine gas circuit system mainly adopts rule-based control strategies, and the calibration work is huge, and the coordinated optimization control development that meets the multi-objective requirements of the system is still blank.

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