Closed Loop Control Using Ion Current Signal in a Diesel Engine

2012 ◽  
Author(s):  
Tamer Badawy ◽  
Naeim Henein ◽  
Walter Bryzik
Keyword(s):  
Diesel Engine ◽  
Closed Loop ◽  
Ion Current ◽  
Closed Loop Control ◽  
Current Signal ◽  
Loop Control

scholarly journals A Sinusoidal Current Source for Bioimpedance Applications Based on a Nonlinear Discrete Time Closed Loop Control Algorithm

2019 ◽  
Vol 10 (2) ◽  
Author(s):  
Diego Alberto Bravo Montenegro
Keyword(s):  
Discrete Time ◽  
Closed Loop ◽  
Current Source ◽  
Nonlinear Difference Equation ◽  
Closed Loop Control ◽  
Current Signal ◽  
Impedance Tomography ◽  
Shunt Resistance ◽  
Loop Control ◽  
Sinusoidal Current

Sinusoidal current sources are fundamental components of electronic equipment used in bioimpedanceanalysis and in electrical impedance tomography. Currently, these sources are mostly implemented asanalog electronic systems. The aim of this paper is to present a new approach to current sources designbased on discrete-time closed-loop control systems. The experimental results are obtained by implementingthe current source in a system of analog and digital programmable blocks, and using as a controllera nonlinear difference equation proposed by the authors. This controller guarantees the convergence ofthe amplitude of the current flowing through the load, towards a user-desired level. This new control lawdoes not require any parametric adjustment nor knowledge of the load . The developed device is able toproduce a sinusoidal current signal of a frequency ranging from 100 Hz to 120 kHz and currents from500 μA to 2 mA. The amplitude error of the current signal remained below 1% for tests performed withresistive-capacitive loads (Cole’s type loads). The output impedance is frequency dependent and rangesfrom 410 kW to 966 kW. The total harmonic distortion is less than 5%. All the proposed system is embeddedin the mixed signal device PSOC 5LP, a shunt resistance being the only external component.

scholarly journals Study on the effect of EGR control parameters on turbocharged diesel engine

2021 ◽  
Vol 268 ◽  
pp. 01046
Author(s):  
Le Liu ◽  
Lihui Wang ◽  
Peilin Geng ◽  
Xionghui Zou ◽  
Kaibo Yu
Keyword(s):  
Diesel Engine ◽  
Oxygen Concentration ◽  
Performance Optimization ◽  
Closed Loop ◽  
Control Method ◽  
Closed Loop Control ◽  
Turbocharged Diesel Engine ◽  
Feedback Parameter ◽  
Transient Conditions ◽  
Loop Control

Under transient conditions, the emission of turbocharged diesel engine will deteriorate to a certain extent, and the adoption of EGR is also a factor leading to the increase of some pollutants. For this reason, a high pressure common rail turbocharged and inter-cooled heavy duty diesel engine was used to study the influence of EGR closed-loop control method on the emission performance under typical transient conditions with constant speed and torque increasing in 5s. The results show: The NOx emission can not be effectively reduced when the air input is used as feedback parameter; When the intake oxygen concentration is used as feedback parameter, smoke emission will increase sharply; When exhaust oxygen concentration is used as feedback parameter, the smoke deterioration is less, the peak smoke is 15.8%. It has a better compromise relationship with NOx and fuel consumption, and can be used as closed-loop control parameter for diesel engine transient performance optimization.

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