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Gas path optimal control system of electric assisted turbocharged diesel engine

A technology of turbocharging and optimal control, which is applied in engine control, mechanical equipment, combustion engines, etc., can solve the problems that the optimal control of the gas system cannot be guaranteed, the development of coordinated optimal control is still blank, and the calibration work is huge.

Active Publication Date: 2020-09-01
JILIN UNIV
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  • Application Information

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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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  • Gas path optimal control system of electric assisted turbocharged diesel engine
  • Gas path optimal control system of electric assisted turbocharged diesel engine
  • Gas path optimal control system of electric assisted turbocharged diesel engine

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Embodiment Construction

[0092] Aiming at the characteristics of multi-actuators, multi-objectives and constraints in the gas circuit system of an electric-assisted turbocharged diesel engine, the present invention proposes an optimized control system for the gas circuit of an electrically-assisted turbocharged diesel engine. The system adopts a layered control structure: 1) Upper layer: Under the premise of meeting the driver's expected torque demand, the equivalent fuel consumption optimization method is used to manage the energy of the electromechanical system composed of the auxiliary motor-battery, and the optimal exhaust manifold pressure reference trajectory is calculated to ensure The state of charge (SOC) of the battery changes within the ideal range; 2) the lower layer: design a multiple-input multiple-output (MIMO) air path tracking controller based on nonlinear model predictive control (NMPC). The precise tracking of the expected intake manifold pressure, exhaust manifold pressure and EGR m...

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Abstract

The invention discloses a gas path optimal control system of an electric assisted turbocharged diesel engine, and belongs to the technical field of diesel engine electric control. The gas path optimalcontrol system of the electric assisted turbocharged diesel engine aims at multiple executers and multiple control targets of an electric assisted turbocharged system and is provided with constraintdifficulty. An oil path sensor module, a gas path sensor module and an oil path controller module are set up, a lower-layer NMPC based gas path tracking controller is designed by facing a three-ordermodel of a gas path of the e electric assisted turbocharged diesel engine of multi-target gas path tracking control, and then an upper-layer optimal controller is designed. According to the multi-target requirements of the electric assisted turbocharged gas path control system, precise tracking control of the multi-gas-path state and optimal management of energy transmission in the system are achieved, and therefore the comprehensive performance of the electric assisted turbocharged diesel engine is improved.

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...

Claims

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Application Information

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IPC IPC(8): F02B37/10F02B37/14F02B37/22F02D29/02F02D23/00
CPCF02B37/10F02B37/14F02B37/22F02D23/00F02D29/02F02D2200/1002Y02T10/12
Inventor 宫洵李娜孙萌鸽胡云峰高巍陈虹
Owner JILIN UNIV
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