Diesel Engine Injector Waveform Monitoring in Real-Time for Fuel Efficiency

2012 ◽  
Author(s):  
Q. R. Farooqi ◽  
S. Anwar ◽  
B. Snyder
Keyword(s):  
Real Time ◽  
High Speed ◽  
Fuel Efficiency ◽  
Direct Memory Access ◽  
Operating Conditions ◽  
Start Of Injection ◽  
Field Programmable ◽  
High Speed Data Acquisition ◽  
Correction Table ◽  
Injector Pulse

This paper presents the development, experimentation and validation of a reliable and robust system, which can be easily calibrated for different engine platforms, to monitor the injector pulse generated by an Engine Control Module (ECM) and feedback the corresponding fueling quantity to the real-time computer in a closed-loop Controller in the loop (CIL) bench in order to achieve optimal fueling. This research utilized Field Programmable Gate Arrays (FPGA) and Direct Memory Access (DMA) transfer capability to achieve high speed data acquisition and delivery. The research is conducted in two stages, first stage was to study the variability involved in the injected fueling quantity from pulse to pulse, from injector to injector, between real injector stators and inductor load cells, over different operating conditions. Different thresholds were experimented to find out the best start of injection (SOI) threshold and the end of injection (EOI) threshold that captured the injector “on-time” with best reliability and accuracy. Second stage involved development of a system that interprets the injector pulse into fueling quantity; the system can be easily calibrated to be used over various platforms. Finally, the use of resulting correction table was found to capture the fueling quantity with best accuracy.

scholarly journals Real Time Monitoring of Diesel Engine Injector Waveforms for Accurate Fuel Metering and Control

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Q. R. Farooqi ◽  
B. Snyder ◽  
S. Anwar
Keyword(s):  
Real Time ◽  
High Speed ◽  
Direct Memory Access ◽  
Operating Conditions ◽  
Start Of Injection ◽  
Field Programmable ◽  
High Speed Data Acquisition ◽  
Correction Table ◽  
High Speed Data ◽  
Injector Pulse

This paper presents the development, experimentation, and validation of a reliable and robust system to monitor the injector pulse generated by an engine control module (ECM) which can easily be calibrated for different engine platforms and then feedback the corresponding fueling quantity to the real-time computer in a closed-loop controller in the loop (CIL) bench in order to achieve optimal fueling. This research utilizes field programmable gate arrays (FPGA) and direct memory access (DMA) transfer capability to achieve high speed data acquisition and delivery. This work is conducted in two stages: the first stage is to study the variability involved in the injected fueling quantity from pulse to pulse, from injector to injector, between real injector stators and inductor load cells, and over different operating conditions. Different thresholds have been used to find out the best start of injection (SOI) threshold and the end of injection (EOI) threshold that capture the injector “on-time” with best reliability and accuracy. Second stage involves development of a system that interprets the injector pulse into fueling quantity. The system can easily be calibrated for various platforms. Finally, the use of resulting correction table has been observed to capture the fueling quantity with highest accuracy.

Realization of Real-Time Transmission of Spectrum Data Based on the uPP Interface of OMAPL138

2014 ◽  
Vol 577 ◽  
pp. 640-643 ◽  
Author(s):  
Jie Feng Wang ◽  
Dong Hui Huang ◽  
Chao Hai Li
Keyword(s):  
Real Time ◽  
High Speed ◽  
Direct Memory Access ◽  
Parallel Port ◽  
The Real ◽  
Spectrum Monitoring ◽  
Time Domain Data ◽  
Field Programmable ◽  
Real Time Transmission ◽  
Spectrum Data

This paper presents a high-speed and multi-thread-safe transmission based on the universal parallel port (uPP) of OMAPL138 and Field Programmable Gate Array (FPGA).With the aid of I/O module used with IOM mini-drivers (GIO module) under DSP/BIOS and internal direct memory access (DMA), this system can obtain a high momentary speed at 300MB/s. This system is designed for the real-time transmission of spectrum data and raw time-domain data which are most important data for monitoring the wireless frequency resource. The real-time transmission of spectrum data has been applied in a spectrum monitoring receiver.

Accelerating laser processes with a smart two-dimensional polygon mirror scanner for ultra-fast beam deflection

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Florian Roessler ◽  
André Streek
Keyword(s):  
Energy Distribution ◽  
Real Time ◽  
Laser Processing ◽  
High Speed ◽  
Beam Deflection ◽  
Two Dimensional ◽  
Heat Accumulation ◽  
Field Programmable ◽  
Drill Holes ◽  
Average Laser

Abstract In laser processing, the possible throughput is directly scaling with the available average laser power. To avoid unwanted thermal damage due to high pulse energy or heat accumulation during MHz-repetition rates, energy distribution over the workpiece is required. Polygon mirror scanners enable high deflection speeds and thus, a proper energy distribution within a short processing time. The requirements of laser micro processing with up to 10 kW average laser powers and high scan speeds up to 1000 m/s result in a 30 mm aperture two-dimensional polygon mirror scanner with a patented low-distortion mirror configuration. In combination with a field programmable gate array-based real-time logic, position-true high-accuracy laser switching is enabled for 2D, 2.5D, or 3D laser processing capable to drill holes in multi-pass ablation or engraving. A special developed real-time shifter module within the high-speed logic allows, in combination with external axis, the material processing on the fly and hence, processing of workpieces much larger than the scan field.

Fifty years of Electronic Hardware Implementations of First and Higher Order Neural Networks

2010 ◽  
pp. 269-285 ◽  
Author(s):  
David R. Selviah ◽  
Janti Shawash
Keyword(s):  
Neural Networks ◽  
Real Time ◽  
High Speed ◽  
Higher Order ◽  
Low Latency ◽  
Real Time Control ◽  
Practical Applications ◽  
Field Programmable ◽  
On Chip ◽  
Electronic Hardware

This chapter celebrates 50 years of first and higher order neural network (HONN) implementations in terms of the physical layout and structure of electronic hardware, which offers high speed, low latency, compact, low cost, low power, mass produced systems. Low latency is essential for practical applications in real time control for which software implementations running on CPUs are too slow. The literature review chapter traces the chronological development of electronic neural networks (ENN) discussing selected papers in detail from analog electronic hardware, through probabilistic RAM, generalizing RAM, custom silicon Very Large Scale Integrated (VLSI) circuit, Neuromorphic chips, pulse stream interconnected neurons to Application Specific Integrated circuits (ASICs) and Zero Instruction Set Chips (ZISCs). Reconfigurable Field Programmable Gate Arrays (FPGAs) are given particular attention as the most recent generation incorporate Digital Signal Processing (DSP) units to provide full System on Chip (SoC) capability offering the possibility of real-time, on-line and on-chip learning.

Design and Test of High Speed Digitization Sampling Circuit Based on FPGA

2013 ◽  
Vol 482 ◽  
pp. 386-389
Author(s):  
Peng Qin ◽  
Hao Lu ◽  
Zhi Ye Jiang ◽  
Jin Liang Bai ◽  
Lu Gao ◽  
...  
Keyword(s):  
Data Acquisition ◽  
Circuit Design ◽  
Field Programmable Gate Array ◽  
High Speed ◽  
Engineering Practice ◽  
Excellent Performance ◽  
Field Programmable ◽  
High Speed Data Acquisition ◽  
High Speed Data ◽  
Data Acquisition Program

To sample wideband IF signal with large amounts of data, a high-speed data acquisition program is presented. The program focus on circuit design, issues that need attention, and high-speed sampling signal deceleration strategy. The 2.4GHz rate sampling data acquisition, reception and demux are completed with ADC083000 and Field-Programmable Gate Array (FPGA). At last, a result of sampling with the converter is offered by chipscope software. The result verified ADC083000 has an excellent performance with more than 6.5 bit ENOB and good phase coherence. In engineering practice, the design has been used and has good performance.

Low-sooting combustion in a small-bore high-speed direct-injection diesel engine using narrow-angle injectors

2008 ◽  
Vol 222 (10) ◽  
pp. 1927-1937 ◽  
Author(s):  
T-G Fang ◽  
R E Coverdill ◽  
C-F F Lee ◽  
R A White
Keyword(s):  
Diesel Engine ◽  
High Speed ◽  
Direct Injection ◽  
Fuel Efficiency ◽  
Operating Conditions ◽  
Injection Timing ◽  
Exhaust Pipe ◽  
Injection Angle ◽  
Direct Injection Diesel Engine ◽  
Combustion Flame

An optically accessible high-speed direct-injection diesel engine was used to study the effects of injection angles on low-sooting combustion. A digital high-speed camera was employed to capture the entire cycle combustion and spray evolution processes under seven operating conditions including post-top-dead centre (TDC) injection and pre-TDC injection strategies. The nitrogen oxide (NO x) emissions were also measured in the exhaust pipe. In-cylinder pressure data and heat release rate calculations were conducted. All the cases show premixed combustion features. For post-TDC injection cases, a large amount of fuel deposition is seen for a narrower-injection-angle tip, i.e. the 70° tip, and ignition is observed near the injector tip in the centre of the bowl, while for a wider-injection-angle tip, namely a 110° tip, ignition occurs near the spray tip in the vicinity of the bowl wall. The combustion flame is near the bowl wall and at the central region of the bowl for the 70° tip. However, the flame is more distributed and centralized for the 110° tip. Longer spray penetration is found for the pre-TDC injection timing cases. Liquid fuel impinges on the bowl wall or on the piston top and a fuel film is formed. Ignition for all the pre-TDC injection cases occur in a distributed way in the piston bowl. Two different combustion modes are observed for the pre-TDC injection cases including a homogeneous bulky combustion flame at earlier crank angles and a heterogeneous film combustion mode with luminous sooting flame at later crank angles. In terms of soot emissions, NO x emissions, and fuel efficiency, results show that the late post-TDC injection strategy gives the best performance.

Predictions of Rotordynamic Performance for Electric Turbocompound

2012 ◽  
Author(s):  
Keun Ryu ◽  
Augustine Cavagnaro
Keyword(s):  
High Speed ◽  
Fuel Efficiency ◽  
Element Model ◽  
Operating Conditions ◽  
System Level ◽  
Engine Oil ◽  
Storage Device ◽  
Prototype Development ◽  
Linear And Nonlinear ◽  
Type Motor

An electric turbocompound (ETC) system for heavy duty diesel engines offers significant system level benefits, such as improved fuel efficiency and reduced NOx emissions with a lower CO2 footprint. Presently, a high speed switched reluctance type motor/generator is integrated into a turbocharger shaft between the turbine and compressor wheels. The motor assists rapid acceleration of the turbocharger shaft, thereby rendering faster transient response. At steady or over-boost operating conditions, the generator provides electric power which can be used directly or stored in an on-board storage device. ETCs operate at high rotational speeds and, if equipped with fluid film bearings, use pressurized engine oil to lubricate the bearings (journal and thrust). This paper presents comprehensive predictions of the linear and nonlinear shaft motions of an ETC supported on floating ring bearings. A rotor structural finite element model integrates the floating ring bearing model for prediction of the rotor-bearing system (RBS) linear and nonlinear forced responses under actual operating conditions. Predictions show a complex rotordynamic behavior of the RBS with large amplitude subsynchronous motions over a wide speed range. However, the subsynchronous whirl motions reach a limit cycle enabling continuous operation without system failure. Most importantly, stiffness of the lamination stack mounted on the shaft has a significant effect on the amplitude and frequency content of the shaft motion. The present analysis effectively aids to accelerate ETC prototype development with increased reliability and product troubleshooting.

Software Design Based on PLD High-Speed Data Acquisition System

2013 ◽  
Vol 798-799 ◽  
pp. 647-650
Author(s):  
Geng Zhang ◽  
Hao Xu
Keyword(s):  
Data Acquisition ◽  
Real Time ◽  
Software Design ◽  
High Speed ◽  
Data Acquisition System ◽  
Acquisition System ◽  
Data Sampling ◽  
Logic Function ◽  
High Speed Data Acquisition ◽  
High Speed Data

Data collection in the important position of modern industrial production and scientific research is increasingly outstanding, as well as the real-time collection, real-time transmission and real-time processing of high speed data acquisition requirements are constantly improve. In addition, for different occasions, the data acquisition system of data sampling parameters are different. PLD as a universal integrated circuit, its logic function according to user's programming on the device, this paper introduces the high-speed data acquisition system based on PLD, mainly expounds the software design of the system, this paper introduces a simple PLD system, using FPGA as the data acquisition chip, the main measure the infrared remote control code acquisition, based on EDA technology to design a core, using DMA access to data, to achieve high-speed system requirements.

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