Development of Next-Generation Air-Fuel Ratio Control System, “COSMIC”

2002 ◽  
Author(s):  
Hajime Hosoya ◽  
Hidekazu Yoshizawa ◽  
Shigeo Ohkuma ◽  
Satoru Watanabe ◽  
Hiroshi Okada ◽  
...  
Keyword(s):  
Control System ◽  
Next Generation ◽  
Fuel Ratio

Maintaining Low Exhaust Emissions With Turbocharged Gas Engines Using a Feedback Air–Fuel Ratio Control System

1987 ◽  
Vol 109 (4) ◽  
pp. 487-490 ◽  
Author(s):  
D. W. Eckard ◽  
J. V. Serve´
Keyword(s):  
Control System ◽  
Temperature Control ◽  
Exhaust Emissions ◽  
Ambient Conditions ◽  
Load Range ◽  
Heating Value ◽  
Gas Engine ◽  
Precise Control ◽  
Natural Gas Engine ◽  
Fuel Ratio

Maintaining low exhaust emissions on a turbocharged, natural gas engine through the speed and load range requires precise control of the air–fuel ratio. Changes in ambient conditions or fuel heating value will cause the air–fuel ratio to change substantially. By combining air–gas pressure with preturbine temperature control, the air–fuel ratio can be maintained regardless of changes in the ambient conditions or the fuel’s heating value. Design conditions and operating results are presented for an air–fuel controller for a turbocharged engine.

Next Generation of Real Time Data Acquisition, Calibration and Control System for the RatCAP Scanner

2007 ◽  
Author(s):  
Sachin S Junnarkar ◽  
Jack Fried ◽  
Sudeepti Southekal ◽  
Jean-Francois Pratte ◽  
Paul O'Connor ◽  
...  
Keyword(s):  
Control System ◽  
Data Acquisition ◽  
Real Time ◽  
Next Generation ◽  
Time Data ◽  
Real Time Data ◽  
And Control

Novel Positioning Devices for Ultraprecision Machine Tool

2009 ◽  
Vol 407-408 ◽  
pp. 81-84 ◽  
Author(s):  
Hiroshi Mizumoto ◽  
Makoto Yabuya
Keyword(s):  
Control System ◽  
Machine Tool ◽  
Piezoelectric Actuator ◽  
Numerical Control ◽  
Positioning System ◽  
Numerical Control System ◽  
Next Generation ◽  
Positioning Device ◽  
Positioning Devices ◽  
Long Stroke

For ultraprecision machine tool of the next generation, two novel positioning devices are invented by the authors. The first positioning device of nanometer and sub-nanometer resolution with long stroke is the Twist-roller Friction Drive (TFD). For long stroke with 1nm of positioning resolution, the TFD is driven by a servomotor, and it is driven by a piezoelectric actuator for short stroke with 0.1nm of positioning resolution. The second positioning device of short stroke picometer resolution is an active aerostatic guideway employing the Active Inherent Restrictor (AIR). The stroke of the active aerostatic guideway is in the order of 0.1μm, however, the positioning resolution can be 50pm. These positioning devices are integrated into a tri-mode positioning system and each positioning mode is controlled by a numerical control system.

Development and Simulation Using of Energy Saving Combustion Control System

2012 ◽  
Vol 512-515 ◽  
pp. 1117-1120
Author(s):  
Fei Fei Zhang ◽  
Guo Liang Guo ◽  
Chun Shan Sun ◽  
Bao Zhu Liu ◽  
Zong Qi Liu
Keyword(s):  
Control System ◽  
Energy Saving ◽  
Computer Control ◽  
Control Program ◽  
Combustion Control ◽  
Dynamic Link Library ◽  
Control Programs ◽  
Fuel Ratio ◽  
Communication Program ◽  
Upper Computer

A remotely controlled energy saving combustion control system is developed in this paper. The system includes three parts: upper computer, communication program between upper and lower computer, lower computer control program. Friendly human-machine interface is designed by Labview, which realizes the remote control of PLC; With Visual C, a standard dynamic link library is designed and debugged, by which the serial communication between PC and PLC can be realized; According to the scheme of air-fuel ratio, the control programs are achieved by PLC, which realizes energy saving combustion. The results of experiment in PLC experimental platform shows that the PC can effectively control the PLC .The scheme of air-fuel ratio is similar with the actual situation.

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