MBT Timing Detection and its Closed-Loop Control Using In-Cylinder Pressure Signal

For reduction of engine-out emissions and improvement of fuel economy, closed-loop control of the combustion process has been explored and documented by many researchers. In the closed-loop control, the engine control parameters are optimized according to the estimated instantaneous combustion metrics provided by the combustion sensing process. Combustion sensing process is primarily composed of two aspects: combustion response signal acquisition and response signal processing. As a number of different signals have been employed as the response signal and the signal processing techniques can be different, this paper did a review work concerning the two aspects: combustion response signals and signal processing techniques. In-cylinder pressure signal was not investigated as one of the response signals in this paper since it has been studied and documented in many publications and also due to its high cost and inconvenience in the application.

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Integrated cylinder pressure measurement for gas engine control

Combustion Engines ◽

10.19206/ce-117087 ◽

2011 ◽

Vol 146 (3) ◽

pp. 16-23

Author(s):

Stefan NEUMANN

Keyword(s):

Pressure Measurement ◽

Closed Loop ◽

Pressure Sensors ◽

Pressure Curve ◽

Closed Loop Control ◽

Engine Control ◽

Cylinder Pressure ◽

Loop Control ◽

Gas Engine ◽

Amount Of Information

Closed loop control based on cylinder pressure measurement has been investigated for over 20 years. The aim has been to improve combustion control and online engine diagnostics. However the price of cylinder pressure sensors and the high demands on processor capacity have been preventing the development. Lately however sensor technologies have improved and as a result costs have been reduced. The purpose of this work is to show the large amount of information that can be read out from the cylinder pressure curve and to evaluate a cylinder pressure based closed loop engine control.

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Closed Loop Control of Spark Advance Using a Cylinder Pressure Sensor

Journal of Dynamic Systems Measurement and Control ◽

10.1115/1.3427059 ◽

1976 ◽

Vol 98 (4) ◽

pp. 414-420 ◽

Cited By ~ 58

Author(s):

M. Hubbard ◽

P. D. Dobson ◽

J. D. Powell

Keyword(s):

Pressure Sensor ◽

Environmental Conditions ◽

Engine Speed ◽

Closed Loop ◽

Operating Regime ◽

Control Technique ◽

Closed Loop Control ◽

Cylinder Pressure ◽

Closed Loop System ◽

Loop Control

The objective of the spark advance control technique discussed in this paper is to provide a schedule which is optimum in the presence of changing engine and environmental conditions. The paper shows the benefits of adaptable spark control, describes the ability of a cylinder pressure based system to adapt to optimum spark on a single cylinder laboratory engine and describes the transient performance of a controller mechanized in the laboratory. Averaged over the entire engine speed-load operating regime, the closed loop system yields average brake horsepower within 0.1 percent of optimum based solely on the cylinder pressure information. The system has demonstrated a transient settling time of 0.1 second.

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Study on Reduction of Diesel Engine Out Emission through Closed Loop Control based on the In-Cylinder Pressure with EGR Model

10.4271/2013-01-0322 ◽

2013 ◽

Cited By ~ 5

Author(s):

Seunghyun Lee ◽

Jeongwoo Lee ◽

Seungha Lee ◽

Dongsu Kim ◽

Yoonwoo Lee ◽

...

Keyword(s):

Diesel Engine ◽

Closed Loop ◽

Closed Loop Control ◽

Cylinder Pressure ◽

Loop Control

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The Impact of Visual Feedback Type on the Mastery of Visuo-Motor Transformations

Zeitschrift für Psychologie ◽

10.1027/2151-2604/a000084 ◽

2012 ◽

Vol 220 (1) ◽

pp. 3-9 ◽

Cited By ~ 4

Author(s):

Sandra Sülzenbrück

Keyword(s):

Empirical Research ◽

Visual Feedback ◽

Closed Loop ◽

Motor Planning ◽

Visual Input ◽

Closed Loop Control ◽

Loop Control ◽

Feedback Type ◽

Effective Use ◽

The Impact

For the effective use of modern tools, the inherent visuo-motor transformation needs to be mastered. The successful adjustment to and learning of these transformations crucially depends on practice conditions, particularly on the type of visual feedback during practice. Here, a review about empirical research exploring the influence of continuous and terminal visual feedback during practice on the mastery of visuo-motor transformations is provided. Two studies investigating the impact of the type of visual feedback on either direction-dependent visuo-motor gains or the complex visuo-motor transformation of a virtual two-sided lever are presented in more detail. The findings of these studies indicate that the continuous availability of visual feedback supports performance when closed-loop control is possible, but impairs performance when visual input is no longer available. Different approaches to explain these performance differences due to the type of visual feedback during practice are considered. For example, these differences could reflect a process of re-optimization of motor planning in a novel environment or represent effects of the specificity of practice. Furthermore, differences in the allocation of attention during movements with terminal and continuous visual feedback could account for the observed differences.

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