Dynamic Modeling of a Piezoelectric Actuated Fuel Injector

2011 ◽  
Vol 133 (5) ◽  
Author(s):  
Chris A. Satkoski ◽  
Gregory M. Shaver ◽  
Ranjit More ◽  
Peter Meckl ◽  
Douglas Memering ◽  
...  
Keyword(s):  
Control System ◽  
Injection Rate ◽  
Fuel Injector ◽  
Fuel Injectors ◽  
Response Characteristics ◽  
Rate Shaping ◽  
System Verification ◽  
Reduce Emissions ◽  
And Control ◽  
Injector Design

As engine designers look for ways to improve efficiency and reduce emissions, piezoelectric actuated fuel injectors for common rail diesel engines have shown to have improved response characteristics over solenoid actuated injectors and may allow for enhanced control of combustion through multipulse, closely spaced injections or rate shaping. This paper outlines the development of an 11 state simulation model for a piezoelectric fuel injector and associated driver that can be used for injector design and control system verification. Nonmeasureable states of the model are plotted and analyzed, while measurable quantities including injection rate, piezo stack voltage, and piezo stack current are validated against experimental injector rig data for two different rail pressures.

Rate Shaping Estimation and Control of a Piezoelectric Fuel Injector

2013 ◽  
Author(s):  
Dat Le ◽  
Bradley W. Pietrzak ◽  
Gregory M. Shaver
Keyword(s):  
Fuel Injection ◽  
Fuel Efficiency ◽  
Nonlinear Behavior ◽  
Fast Response ◽  
Injection Rate ◽  
Fuel Injector ◽  
Fuel Injectors ◽  
Rate Shaping ◽  
Estimation And Control ◽  
Fuel Injection Rate

Fuel injection rate shaping is one way to improve fuel efficiency and reduce harmful emissions in IC engines. Piezoelectrically actuated fuel injectors have a particularly fast response, which makes them capable of rate shaping operation. In this paper, a model-based closed-loop controller is designed to control the fuel injection rate passing through the nozzle of a piezoelectric fuel injector, by compensating for the injector’s nonlinear behavior. The performance of this controller is verified with simulation results.

scholarly journals Study on the sensitivity of the hydraulic response characteristics of the electronic fuel injector regarding the key structural parameters

2019 ◽  
Vol 11 (1) ◽  
pp. 168781401882259 ◽  
Author(s):  
Yaonan Feng ◽  
Jie Wang ◽  
Fukang Ma ◽  
Tiexiong Su ◽  
Chunlong Xu ◽  
...  
Keyword(s):  
Structural Parameters ◽  
Influencing Factor ◽  
Response Characteristic ◽  
Fuel Injector ◽  
Closing Time ◽  
Range Analysis ◽  
Small Opening ◽  
Response Characteristics ◽  
And Control ◽  
Hydraulic Response

The sensitivity of key structural parameters to the hydraulic response characteristics in an electronic fuel injector is investigated. First, the hydraulic response characteristic is defined in detail (the opening/closing delay and the opening/closing time). Second, the key structural parameters influencing the hydraulic response characteristics are derived. Finally, the importance and effects of key structural parameters on hydraulic response characteristics are examined, by using the design of experiments method and the range analysis. Results show that the fuel inlet passage diameter is the primary influencing factor to the opening delay and closing delay, while the control piston diameter has the dominant effect on opening time and closing time. A small opening delay and a small opening time prefer a little fuel inlet passage diameter and control piston diameter; however, they contribute to a large closing time and closing delay. The fuel outlet passage diameter is the secondary influencing factor in opening delay, but the second factor that affects the opening time is the diameter of needle.

Distributed Measuring and Control System of Torque Rheometer

2012 ◽  
Vol 468-471 ◽  
pp. 1486-1489
Author(s):  
Peng Wang ◽  
Jian Yan ◽  
Ting Chen ◽  
Ming Li
Keyword(s):  
Control System ◽  
Pid Control ◽  
Control Algorithm ◽  
Data Link ◽  
Measurement And Control System ◽  
Response Characteristics ◽  
The Stability ◽  
Link Layer Protocol ◽  
And Control ◽  
Measurement And Control

This paper presents a new distributed control system used in torque rheometer. It can overcome shortcomings in traditional control system of torque rheometer and optimize overall performance of the system. The measurement and control system was designed by modeling method. The enhanced PID control algorithm and integration separation digital PID control algorithm were adopted to improve dynamic response characteristics. The Modbus communication protocol was selected as data link layer protocol of communications network. The monitoring software was developed by Visual Basic. A large number of experiments demonstrate that the stability of system is improved greatly and maintenance and extension of instrument become easier.

Fuel Injector Design Based on 2D Technology

2012 ◽  
Vol 482-484 ◽  
pp. 1943-1946
Author(s):  
Li Dan Chen ◽  
Huang Xiang Shan
Keyword(s):  
High Speed ◽  
Fuel Injection ◽  
Injection Rate ◽  
Injection System ◽  
Fuel Injector ◽  
Electromagnetic Valve ◽  
Spool Valve ◽  
Fuel Injection Rate ◽  
Injector Design ◽  
The Ideal

Through the discussion of main shortages of the high-speed electromagnetic valve used in electronic fuel injection system, the author introduced a new design thought of fuel injector based on 2D technology. Axial displacement of controlling valve was used to control the volume of gushing oil, while radial revolution of spool valve was used to change the time of injection. Additionally, mathematic modeling and MATLAB simulating indicated that, the injector designed based on 2D technology acquired the advantages of quick response and also realized the ideal shape of fuel injection rate.

Development of a Jacobian Module for Advanced Pulp and Paper Simulation and Control

TAPPI Journal ◽  
2009 ◽  
Vol 8 (1) ◽  
pp. 4-11
Author(s):  
MOHAMED CHBEL ◽  
LUC LAPERRIÈRE
Keyword(s):  
Control System ◽  
Nonlinear Behavior ◽  
Simulation Software ◽  
Pulp And Paper ◽  
Pid Controllers ◽  
Tuning Parameters ◽  
Pid Tuning ◽  
Fixed Set ◽  
And Control ◽  
Operating Points

Pulp and paper processes frequently present nonlinear behavior, which means that process dynam-ics change with the operating points. These nonlinearities can challenge process control. PID controllers are the most popular controllers because they are simple and robust. However, a fixed set of PID tuning parameters is gen-erally not sufficient to optimize control of the process. Problems related to nonlinearities such as sluggish or oscilla-tory response can arise in different operating regions. Gain scheduling is a potential solution. In processes with mul-tiple control objectives, the control strategy must further evaluate loop interactions to decide on the pairing of manipulated and controlled variables that minimize the effect of such interactions and hence, optimize controller’s performance and stability. Using the CADSIM Plus™ commercial simulation software, we developed a Jacobian sim-ulation module that enables automatic bumps on the manipulated variables to calculate process gains at different operating points. These gains can be used in controller tuning. The module also enables the control system designer to evaluate loop interactions in a multivariable control system by calculating the Relative Gain Array (RGA) matrix, of which the Jacobian is an essential part.

Еlectric Drive and Control System of Flying saw of electricweld item

2015 ◽  
Vol 19 (95) ◽  
pp. 50-53
Author(s):  
Aleksej A. Kravcov ◽  
◽  
Leonid G. Limonov ◽  
Valerij V. Sinelnikov ◽  
Stanislav V. Potapov
Keyword(s):  
Control System ◽  
Drive And Control ◽  
And Control
Sign in / Sign up

Export Citation Format

Share Document