DIGITALLY CONTROLLED FLOW METERING UNIT WITH DOUBLE ACTUATION FOR FAST TRANSIENT RESPONSE IN AUTOMOTIVE APPLICATIONS

1994 ◽  
Vol 04 (04) ◽  
pp. 459-469
Author(s):  
T. KREPEC ◽  
A.I. GEORGANTAS
Keyword(s):  
Transient Response ◽  
Gasoline Engine ◽  
Injection System ◽  
Fast Transient Response ◽  
System A ◽  
Flow Metering ◽  
Digitally Controlled ◽  
And Performance ◽  
Controlled Flow ◽  
The Mathematical Model

This paper proposes a novel compact, inexpensive, yet versatile flow metering unit which consists of two hydraulic valves incorporated in a single barrel and operated directly by two digital actuators. For the evaluation of the concept, the mathematical model of the unit is developed and validated. The model is subsequently used to investigate the operability and performance of the system. A specific control strategy taking advantage of the system hardware is implemented. The enhancement of the transient response, as compared to single actuation conventional units, is demonstrated. Furthermore, the back-up functionality in case of failure of one of the valves is ascertained. This kind of double actuator unit is proposed for, but not limited to, fuel metering in a gasoline engine throttle body injection system.

Features and Performance Data of Cooper-Bessemer Coal-Fueled Six-Cylinder LSB Engine

1992 ◽  
Vol 114 (3) ◽  
pp. 509-514 ◽  
Author(s):  
A. K. Rao ◽  
E. N. Balles ◽  
R. P. Wilson
Keyword(s):  
Preliminary Test ◽  
Injection System ◽  
Exhaust Emission ◽  
Successful Operation ◽  
Single Cylinder ◽  
System A ◽  
Full Power ◽  
Emission Control System ◽  
And Performance ◽  
Engine Components

The six-cylinder Cooper-Bessemer LSB engine has been converted to operate with one cylinder on coal-water slurry (CWS) fuel and with five cylinders operating on diesel fuel. This development followed the successful operation of the single-cylinder JS engine on CWS for over 600 hours to date. The CWS injection system was scaled up about a factor of two in fuel volume from the JS system. A new cam box drive was fabricated for the LSB single-cylinder operation. The engine was operated and full power output was achieved from the CWS cylinder. Preliminary test results indicate good operate efficiency. An exhaust emission control system is in place for the proposed operation of all the six cylinders on CWS and major engine components are on hand. These results mark a significant milestone in the progress toward commercial readiness of the coal-fueled diesel engine system.

Effect of End of Injection Angle on Performance and Emission Formation for a Gasoline Engine

2013 ◽  
Vol 300-301 ◽  
pp. 27-31
Author(s):  
Hsu Fang Chang ◽  
Wang Chih Cheng ◽  
Feng Tsai Weng
Keyword(s):  
Gasoline Engine ◽  
Fuel Injection ◽  
Operating Conditions ◽  
Injection System ◽  
Fuel Injection System ◽  
Injection Angle ◽  
Performance And Emission ◽  
Emission Regulation ◽  
And Performance ◽  
Opening And Closing

The method of supplying fuel for an electronic-controlled fuel injection system is calculating the required fuel amounts under various operating conditions of engine and controlling the opening and closing timing of fuel injection. After fuel injection, the effects of condensation and atomization of injected fuel as well as fuel mixing for combustion are strongly dominated by the opening timing and duration of intake valves. This can further affect the emission composition and performance for an engine. As the emission regulation is getting more stringent and the requirement for minimizing specific fuel consumption is becoming more urgent, investigating the effect of closing timing of fuel injection has turned out to be a major issue. Therefore, this paper presents a study about a series of engine tests to investigate the effect of end of injection angle on the performance and emission formation for a gasoline engine. In these tests, the values of end of injection angle are adjusted using a control software for electronic-controlled fuel injection system so that the results can be analyzed under various engine speeds and loads.

A fast, digitally controlled flow proportional gas injection system for studies in lung function

2003 ◽  
Vol 50 (11) ◽  
pp. 1268-1275 ◽  
Author(s):  
J.K.K. Kanhai ◽  
P.J. Caspers ◽  
E.G.J. Reinders ◽  
J.C. Pompe ◽  
H.A. Bruining ◽  
...  
Keyword(s):  
Lung Function ◽  
Gas Injection ◽  
Injection System ◽  
Digitally Controlled ◽  
Controlled Flow

Application Fuzzy Logic System for Accurate Sheet Trim Shower Position

2019 ◽  
Vol 3 (1) ◽  
pp. 186-192
Author(s):  
Yudi Wibawa
Keyword(s):  
Fuzzy Logic ◽  
Fuzzy Logic Controller ◽  
Dc Motor ◽  
Automation System ◽  
Paper Making ◽  
System A ◽  
Accurate Position ◽  
And Performance ◽  
Better Than ◽  
Logic System

This paper aims to study for accurate sheet trim shower position for paper making process. An accurate position is required in an automation system. A mathematical model of DC motor is used to obtain a transfer function between shaft position and applied voltage. PID controller with Ziegler-Nichols and Hang-tuning rule and Fuzzy logic controller for controlling position accuracy are required. The result reference explains it that the FLC is better than other methods and performance characteristics also improve the control of DC motor.

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