MPC-based Intake Pressure Control of Electric Compound Supercharged Diesel Engine

Tianxiang WANG; Tao CUI; Fujun ZHANG; Yankai ZHAO

doi:10.12382/bgxb.2023.0694

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MPC-based Intake Pressure Control of Electric Compound Supercharged Diesel Engine

更新时间：2025-08-18

- MPC-based Intake Pressure Control of Electric Compound Supercharged Diesel Engine
- Acta Armamentarii Vol. 45, Issue 10, Pages: 3642-3653(2024)
- 作者机构：
  
  北京理工大学机械与车辆学院, 北京 100081
- 作者简介：
- 基金信息：
- DOI：10.12382/bgxb.2023.0694
  CLC：
- Received：25 July 2023，
  
  Published Online：30 October 2024，
  
  Published：31 October 2024
- 稿件说明：
移动端阅览
Tianxiang WANG, Tao CUI, Fujun ZHANG, et al. MPC-based Intake Pressure Control of Electric Compound Supercharged Diesel Engine[J]. Acta Armamentarii, 2024, 45(10): 3642-3653.
DOI：

Tianxiang WANG, Tao CUI, Fujun ZHANG, et al. MPC-based Intake Pressure Control of Electric Compound Supercharged Diesel Engine[J]. Acta Armamentarii, 2024, 45(10): 3642-3653. DOI： 10.12382/bgxb.2023.0694.

摘要

涡轮增压技术是提高发动机动力性和经济性的主要途径之一

而传统废气涡轮增压在低速区间存在滞后性。电动增压技术能有效弥补涡轮增压技术不足

但增加了控制自由度

电复合增压控制策略是保证其性能的关键

为此提出一种基于模型预测控制(Model Predictive Control

MPC)的电复合柴油机进气控制策略。基于电动增压器数学物理方程

建立了离散预测控制模型和涡轮增压状态观测器与流量观测器;通过联合仿真平台

对控制策略和控制参数进行标定验证;对比不同工况下MPC与传统PID控制效果以及抗电源电压扰动能力。研究结果表明:基于所设计的观测器

控制算法能在不加装额外涡轮转速传感器的前提下

实现对进气压力的有效控制

最大稳态误差≤1%;能有效自适应正常工况下废气涡轮增压器的响应特性

提高低速响应

起步工况下5.2s内达到目标进气压比;与传统PID控制算法相比

具有更好抗干扰性和控制精度

动态误差降低42%。

Abstract

Turbocharging technology is one of the main ways to improve the power performance and economy of engine

while traditional exhaust gas turbocharging has hysteresis

especially in the low-speed range of high-power density diesel engines. As an auxiliary and optimization of exhaust gas turbocharging technology

the electric supercharging technology can effectively make up for the shortcomings of turbocharging technology. However

due to the increased degree of control freedom of the electric supercharger

the coordinated control of electric composite supercharging system becomes the key to guaranteeing its performance. In this paper

an electric composite diesel engine intake control strategy based on model predictive control (MPC) is proposed. Firstly

a discrete predictive control model and an exhaust gas turbine observer and flow observer are established based on the mathematical and physical equations of electric supercharger

and then the control strategy and control parameters are verified and calibrated through a co-simulation platform

. Finally

the effects of MPC and traditional PID control under different working conditions as well as the ability to resist power supply voltage disturbance are compared. The results show that the control algorithm based on the observers can realize the coordinated control of the electric composite supercharging system

with maximum steady-state error less than or equal to 1%

without adding turbine speed sensors. It can improve the low-speed response

reduce the transient lag and reach the target inlet pressure ratio within 5.2s

as adapting the response characteristics of exhaust gas turbine under different normal operating conditions. Compared with the traditional PID control algorithm

it has better anti-interference and control accuracy

improving 42% dynamic error.

关键词

Keywords

references

杨攀涛 , 崔涛 , 赵彦凯 . 电动增压器对柴油发动机低速稳态性能的影响 [J ] . 兵工学报 , 2021 , 42 ( 9 ): 1829 - 1837 . DOI: 10.3969/j.issn.1000-1093.2021.09.003 http://doi.org/10.3969/j.issn.1000-1093.2021.09.003 相比于涡轮增压，电动复合增压技术可以提高发动机进气流量和进气响应。通过研究电动增压器转速对发动机扭矩、空燃比和经济性的影响，得出外特性工况下电动增压器的最佳工作点。基于废气涡轮增压器功率、进气功率和燃烧效率，对电动复合增压发动机进行性能仿真，并将电动复合增压发动机与原机进行性能对比。结果表明：电动复合增压系统可以有效提升发动机低速大扭矩区域的工作性能，发动机低速大扭矩区域增加约18%，油耗在220 g/(kW·h)以下区域增加约16.7%；在指示功率增量中，动力循环功增量远大于增压功率提升；增压功率增量主要由废气涡轮增压器的增压功率提升组成；废气涡轮焓降功率提升是废气涡轮增压功率提升的主因。

YANG P T , CUI T , ZHAO Y K . The influence of electric supercharger on steady state performance of engine at low speed [J ] . Acta Armamentarii , 2021 , 42 ( 9 ): 1829 - 1837 . (in Chinese) DOI: 10.3969/j.issn.1000-1093.2021.09.003 http://doi.org/10.3969/j.issn.1000-1093.2021.09.003 Compared with turbocharging，the hybrid electric supercharging technology can improve the air intake volume and responsiveness of engine. The influence of rotating speed of electric supercharger on engine torque，air-fuel ratio and economy is studied to obtain the best working point of electric supercharger. The performance of electric hybrid supercharged engine is simulated based on the power, intake power and combustion effeciency of exhaust lurbocharger. The performance of hybrid electric turbocharged engine was compared with that of the original engine.The results show that the hybrid electric turbocharging system can effectively improve the performance of engine in the low rotating speed and high torque area，the low rotaing speed and high torque area of engine is increased by about 18%，and the fuel consumption is increased by about 16.7% in the area below 220 g/kWh; in the indicated power increment，the power increment of power cycle is far greater than that of the supercharging power;and the supercharging power increment is mainly increased by the supercharging power of the exhaust gas turbocharger. The main reason for the increase in turbocharging power is the enthalpy drop of exhaust gas turbine.

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