scholarly journals Method for testing modern common rail piezoelectric fuel injectors

2021 ◽  
Author(s):  
Tomasz Stoeck
Keyword(s):  
Measuring Equipment ◽  
Test Bench ◽  
Spare Parts ◽  
Common Rail ◽  
Fuel Injectors ◽  
Reference Models ◽  
Regeneration Procedure ◽  
Repairable Components

The paper presents the author's own method for testing piezoelectric common rail fuel injectors, which for many years were considered non-repairable components. This was mainly due to the lack of availability of spare parts and dedicated measuring equipment, enabling full diagnostics under test bench conditions. As a result, their workshop and laboratory servicing was very limited, as effective disassembly concerned basicaly only the plunger and barrel assembly (needle with nozzle) for selected reference models. The situation has now improved to such an extent that an author’s own regeneration procedure has been proposed with the replacement of the most important controls and actuators. The tests were carried out on the example of Siemens VDO Continental PCR 2.3 fuel injectors from one engine, listing the most important stages of this process, including the correction of fuel dosage and returns.

scholarly journals Simplification of the procedure for testing common rail fuel injectors

2020 ◽  
Vol 180 (1) ◽  
pp. 52-56 ◽  
Author(s):  
Tomasz STOECK
Keyword(s):  
Test Bench ◽  
Wide Spectrum ◽  
Characteristic Curve ◽  
Technical Condition ◽  
Common Rail ◽  
Microsoft Excel ◽  
Fuel Injectors ◽  
Active Experiment ◽  
Fuel Delivery ◽  
Problematic Situations

The paper presents a simplified methodology for generating the characteristic curve of fuel doses for common rail injectors, which consists in limiting the number of measurements on the test bench and calculating missing data using predefined (array) functions of the Microsoft Excel spreadsheet. This allows checking the method of fuel delivery in a wide spectrum of predefined pressures and atomiser opening times, while reducing the arduousness and time-consumption of the active experiment phase. The proposed solution is particularly useful in problematic situations when standard manufacturer's tests, referred only to selected work points, make it impossible to clearly assess the technical condition of the injector.

scholarly journals Methodology of testing common rail fuel injectors with the use of Gauss’s formulas

2021 ◽  
Vol 184 (1) ◽  
pp. 11-15
Author(s):  
Tomasz Stoeck
Keyword(s):  
Test Bench ◽  
Technical Condition ◽  
Common Rail ◽  
Digital Environment ◽  
Fuel Injectors ◽  
Similar Profile ◽  
Clear Cut ◽  
Active Experiment ◽  
Fuel Delivery ◽  
Problematic Situations

The paper presents the methodology of testing common rail fuel injectors, which consisted in extending the standard diagnostic proce-dures with the analysis of the resulting fuel delivery fields. The calculations were carried out in a popular spreadsheet, using Gauss's formulas (the so-called shoelace formula). In this way, the necessity to modify the test bench software was eliminated, as the analytical process took place after the end of the active experiment phase. It has been shown that the proposed solution should be particularly useful in problematic situations where clear-cut verification and assessment of the technical condition of the fuel injectors is sometimes difficult, as shown in the example. In addition, implementation in a digital environment allows the presented algorithms to be reused in research with a similar profile.

Measuring equipment and test bench to control evolution of acoustic-deformation and heat fields induced in solids under failure by fluids

2015 ◽  
Vol 51 (3) ◽  
pp. 624-633 ◽  
Author(s):  
V. N. Oparin ◽  
V. I. Vostrikov ◽  
O. M. Usol’tseva ◽  
P. A. Tsoi ◽  
V. N. Semenov
Keyword(s):  
Measuring Equipment ◽  
Test Bench

scholarly journals Research of the influence of spare parts quality on the work of a repair diesel engine

2021 ◽  
Vol 46 (2) ◽  
pp. 38-55
Author(s):  
Vojislav Krstić ◽  
Božidar Krstić
Keyword(s):  
Diesel Engine ◽  
Test Bench ◽  
Internal Combustion ◽  
Spare Parts ◽  
Engine Failure ◽  
Short Time ◽  
Time Of Operation

When repairing the internal combustion Diesel engine, a set of spare parts was installed: crankshaft-flywheel. After the overhauol, the engine was tested on a test bench. After a very short time of operation, an engine failure occurred. Re-overhaul was started, with another set of spare parts: crankshaft-flywheel. After a short time of operation, there were recurrences of engine failures, according to the same mechanisms of occurrence.

Research on Low-Pressure Common Rail Electrical Control Injection System of Dimethyl Ether Engine

2011 ◽  
Vol 228-229 ◽  
pp. 702-707 ◽  
Author(s):  
Jun Tao ◽  
Guang De Zhang
Keyword(s):  
Real Time ◽  
Test Bench ◽  
Saturated Vapor ◽  
Low Pressure ◽  
Test System ◽  
Common Rail ◽  
Injection System ◽  
Signal Acquisition ◽  
Engine Operation ◽  
Electrical Control

According to such properties of DME as high saturated vapor pressure, low viscosity and easy formation of mixture with air, a CPC (Controllable Premix Combustion) low-pressure common rail electrical control fuel injection test bench of DME engine is developed through this research. In addition, an overall design of the test system, hardware and software development of electrical control unit (ECU) and a test on the test bench are undertaken. The software of ECU is programmed by using real time modular programming. It has the advantages of flexible programming, convenient transplantation and wide extending possibility. Test results show that the injector switch timely, spray powerfully and pulverize perfectly. The software accomplishes many tasks such as signal acquisition as well as real-time control requirement of engine operation. Test result also shows the feasibility and good comprehensive performance of low-pressure common rail electronic system for DME fuel.

In vitro trials of a wearable artificial kidney (WAK)

2017 ◽  
Vol 41 (2) ◽  
pp. 84-88 ◽  
Author(s):  
Nikolai A. Bazaev ◽  
Nataliya I. Dorofeeva ◽  
Nikita M. Zhilo ◽  
Evgeniy V. Streltsov
Keyword(s):  
Uric Acid ◽  
Measuring Equipment ◽  
Test Bench ◽  
Artificial Kidney ◽  
Dialysis Fluid ◽  
Initial Values ◽  
Metabolite Concentrations ◽  
Spent Dialysate ◽  
Wearable Artificial Kidney

Background: This paper presents results of in vitro trials of a wearable artificial kidney (WAK). Materials and methods: To carry out the trials, a test bench was developed. It consisted of a patient imitator, a tubing set and measuring equipment. Results: Our WAK can eliminate urea, uric acid and creatinine from spent dialysate with mean mass rates of 0.85 ± 0.1 g/h, 0.10 ± 0.04 g/h and 0.05 ± 0.01 g/h, respectively. Concentrations of Na+, Cl– and Ca2+ ions were kept in the 10% range from initial values. We demonstrated that our WAK can operate for 38 hours without having to replace expendable materials. Conclusions: The WAK that we developed can eliminate metabolites from spent dialysis fluid with mass rates that are sufficient to maintain stable, physiologically normal metabolite concentrations in patients’ blood.

Simulink-Based Codesign and Cosimulation of a Common Rail™ Injector Test Bench

2003 ◽  
Vol 12 (02) ◽  
pp. 171-202 ◽  
Author(s):  
L. M. Reyneri ◽  
E. Bellei ◽  
E. Bussolino ◽  
F. Gregoretti ◽  
L. Mari ◽  
...  
Keyword(s):  
High Speed ◽  
Test Bench ◽  
Pressure Sensors ◽  
Design Tool ◽  
Ease Of Use ◽  
Common Rail ◽  
Injection System ◽  
Signal Acquisition ◽  
Parallel Port ◽  
High Pressure Pump

This paper describes how a complete test bench for a Common Rail™ injection system has been built by means of hardware/software codesign techniques. The test bench is made up of two main components: a HW component running mainly on a FPGA device, interacting directly with the electromechanical components (namely, a high pressure pump, six electrical injectors, an electrical discharge valve, two pressure sensors), for high speed signal acquisition and generation, and for closed loop control; and a SW component, written in Visual Basic™, running on a PC, including a graphical user interface for parameters setting and system characterization. An additional signal acquisition board is also used for monitoring six load cells and for temperature control. The two components communicate through the standard PC's parallel port operated in Enhanced Parallel Port mode. The test bench is totally designed, simulated and implemented under the CodeSimulink hardware/software codesign environment, which runs as a plug-in of The Mathworks™ Simulink™ design tool. A few other commercial HW/SW codesign tools have also been considered, but none of them offered either enough performance or flexibility or, more importantly, ease of use and compatibility with existing Simulink simulation models of the various components of the test bench.

Sign in / Sign up

Export Citation Format

Share Document