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.

scholarly journals Fuel Injector Testing Through Development of a New Test Rig

2019 ◽  
Vol 8 (9) ◽  
pp. 2904-2909
Keyword(s):  
Fuel Injection ◽  
Cylinder Liner ◽  
Heating System ◽  
Injection Rate ◽  
Engine Fuel ◽  
Exhaust Manifold ◽  
Fuel Injector ◽  
Test Rig ◽  
Recirculation System ◽  
Fuel Injection Rate

A modified version of fuel injector with higher injection capacity has been developed. To achieve this, the injector plunger diameter is increased to 11mm from current 9.5mm. A new test rig is developed to understand the functioning of the injector due to the changes incorporated. The new test rig is designed to test injector operation without burning the fuel. Since internal combustion is not present an external arrangement is required to run the engine. This is achieved through a 3-phase induction motor, which is coupled with the crankshaft of the engine. The injected fuel is collected form the cylinders and it is then recirculated. A fuel cooling circuit is also incorporated along with the fuel recirculation system to maintain the temperature of fuel at inlet of fuel pump. An oil heating system is installed in the test rig to maintain the viscosity of the oil by heating it. The required systems for driving the engine, fuel cooling and oil heating are implemented as per the design. The test is conducted on a 19 L diesel engine. Parts which are not required for this test like piston, piston rings, intake and exhaust manifold etc are removed from the engine. And the cylinder liner is blocked from below using a plate to facilitate the collection of injected fuel. Engine is made to run using the motoring rig at the rated speed of 1500 rpm for a duration of 250 hours. Instrumented push tubes are used to measure the push tube load. Push tube load is observed to be in the range of 2700 to 3100 lbf, which is high as compared to the earlier model of the injector. Fuel injection rate is obtained from the fuel collected from the cylinders. And the average fuel injection rate is observed as 0.116 to 2.35 kg/min. Thus, the increase in plunger diameter has led to an increase in fuel injection rate

Research on Simulation for the Electronic Unit Pump Fuel Injection System of HXn5 Diesel Locomotive

2013 ◽  
Vol 645 ◽  
pp. 445-449 ◽  
Author(s):  
Ming Hai Li ◽  
Zhe Zhou ◽  
Xian Zhe Jia
Keyword(s):  
Fuel Injection ◽  
Electronic Control Unit ◽  
Control Unit ◽  
Injection Rate ◽  
Injection System ◽  
Fuel Injection System ◽  
Hydraulic Characteristics ◽  
Diesel Locomotive ◽  
Electronic Unit Pump ◽  
Fuel Injection Rate

Parameters are obtained by mapping the entity structural electronic control unit pump injection system of HXn5 diesel locomotive introduced from USA. A simulation model was built up with GT-Fuel, which can well reflect the electromagnetic and hydraulic characteristics of the fuel injection system, as well as the fuel injection rate and fuel quantity. Compares with locally high-power diesel, the calculation curves show its superiority, which will establish a foundation for optimization and improvement of local fuel injection system.

Supersonic Injection of Gaseous Fuel Described as Possible Solution for NOx Emissions From Large-Bore Gas Engines

2002 ◽  
Author(s):  
Anatoli Borissov ◽  
James J. McCoy
Keyword(s):  
High Speed ◽  
Fuel Injection ◽  
Experimental Testing ◽  
Nox Reduction ◽  
Engine Performance ◽  
Injection System ◽  
Fuel Injector ◽  
Modeling And Analysis ◽  
Jet Mixing ◽  
Supersonic Injection

Both physical and mathematical models were built to describe the main processes in large-bore gas engines. Based on the detail modeling and analysis of cylinder airflow, fuel injection, mixing, combustion and NOx generation, it was possible to pinpoint the problem of abnormal NOx production, even for lean mixtures, that occurs in these engines. In addition, analysis of the experimental data of jet mixing using high-speed photographic evidence, as well as engine performance data, has helped in the understanding of the mixing process. This has resulted in the development of a new way of the mixing of fuel and air utilizing multiple-nozzle supersonic injection. The fuel injection system is designed to optimize the mixing of the methane fuel with the air in the cylinder of a large bore natural gas engine. The design goals of low-pressure (<130 psi), all-electronic valve actuation, and optimal mixing were all achieved with a unique valve/nozzle arrangement. Later, a laser induced fluorescence method was used to take high-speed photographs of the development of the fuel jet exiting the newly developed supersonic electronic fuel injector (SSEFI). This result, together with the results of numerous experimental testing of SSEFI on different engines (GMVH-6, GMW-10, V-250, UTC-165) are presented as evidence of the success of the SSEFI application for the improvement of engine performance, engine control and NOx reduction.

scholarly journals High speed visualization of gasoline pump injector (GPI)

2017 ◽  
Author(s):  
Nallannan Balasubramanian ◽  
Titus Iwaszkiewicz ◽  
Jayabalan Sethuraman
Keyword(s):  
High Speed ◽  
Oxygen Sensor ◽  
Fuel Injection ◽  
Electronic Control Unit ◽  
Control Unit ◽  
Time Response ◽  
Injection System ◽  
Exhaust Pipe ◽  
Fuel Injector ◽  
Two Wheeler

Two-wheeler engines still use carburetor as a fuelling system in many Asian countries, owing to its low cost andless maintenance. The usage of carburetor to handle the upcoming stringent emission norms gets difficult, due to the absence of a closed-loop fuel correction. An electronic fuel injector (EFI), on the other hand, with the help of an electronic control unit (ECU), can correct the fuel quantity and set the air-fuel mixture close to stoichiometric, based on the feedback obtained from the oxygen sensor placed in the exhaust pipe. In this context, an innovative injection system has been developed, that can be applied for such electronic fuel injection in two-wheelers. In this design, the pump and injector are integrated into a single unit, making the system, simple, compact and less expensive. The integrated injector uses a solenoid and spring arrangement, for pressurizing the fuel in a small chamber, and the pressurized fuel is then injected through orifices to produce spray in the intake port. Two-wheeler engines can operate in the order of 10,000 rpm and it poses a big challenge in such injector designs, and therefore the time response of the mechanical and magnetic components of the injector become critical. High-speed back-lit imaging helps in understanding the time response of such injector, by visualizing the spray, while injecting continuously over a period of time. This paper presents the results of high-speed images, obtained from the spray of this new-concept gasoline pump injector (GPI). This exercise, demonstrated that this injector can work at a frequency as high as 83 Hz and also consistently. The spray pattern was found to be very unique and different from the conventional PFIinjection sprays.DOI: http://dx.doi.org/10.4995/ILASS2017.2017.4796

Transient Fuel Injection Rate and Fuel Economy Prediction for a Vehicle Driven with FTP-75 Mode Using an ECU HILS

2013 ◽  
Vol 772 ◽  
pp. 543-548
Author(s):  
Choong Hoon Lee
Keyword(s):  
Fuel Economy ◽  
Fuel Injection ◽  
Data File ◽  
Injection Rate ◽  
Injection System ◽  
Driving Mode ◽  
Sensor Signals ◽  
Recorded Data ◽  
Electric Signals ◽  
Fuel Injection Rate

A fuel injection system which is operated with ECU HILS was used to evaluate the transient fuel injection rate and fuel economy. Several sensor signals from a car such as the engine speed, car speed, cam position, crank position, air mass flow, throttle position and several other sensor signals are measured and recorded as a data file with DAQ-system for a vehicle driven in FTP-75 mode in a chassis dynamometer. Electric signals that are equivalent to the sensor signals from the car are reconstructed from the recorded data file using DAQ boards and a computer. All the reconstructed sensor signals are provided to the ECU with synchronized timing. Injectors were connected to the ECU output pins and were driven by the system to measure the quantity of injected fuel. The ECU HILS show that the transient fuel injection rate and fuel economy for the car driving mode could be successfully predicted. Also, the repeatability of the generation of sensor signals can enhance the accuracy of a range of experiments related to cars fuel injection experiment.

Advanced Fuel Injection System Using a Supercavitating Fuel Injector

2015 ◽  
Author(s):  
John M. Gattoni ◽  
David M. Sykes ◽  
Paul E. Yelvington
Keyword(s):  
Droplet Size ◽  
High Speed ◽  
Fuel Injection ◽  
Injection System ◽  
Nozzle Geometry ◽  
Fuel Injection System ◽  
Fuel Injector ◽  
Penetration Length ◽  
Injector Nozzle ◽  
Fuel Delivery

Using the latest manufacturing technology and patented nozzle geometry, an innovative high-speed (two or more injections at an engine operating speed of 6,000 RPM), lightweight fuel injection system was developed that controls supercavitation within the fuel injector nozzle. The patented supercavitating fuel injector nozzle reduces the penetration length of the fuel spray by 25–30%, average droplet size by 15.5% when operating at the same fuel pressure, and improves droplet size uniformity over conventional nozzles. The combination of these properties represents a tremendous opportunity to improve fuel delivery in engines. In addition to the performance benefits, this technology could be easily implemented into any direct-injected engine system, both compression ignition and spark ignition engines, reciprocating and rotary, because only the nozzle assembly needs to be developed for that particular fuel injector platform.

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.

Characteristics of injection of diesel fuel, rapeseed oil and their mixtures in diesel engines of various types

2021 ◽  
pp. 167-178
Author(s):  
Keyword(s):  
Diesel Engine ◽  
Diesel Fuel ◽  
Diesel Engines ◽  
Rapeseed Oil ◽  
High Speed ◽  
Fuel Injection ◽  
Experimental Studies ◽  
Fuel Injector ◽  
High Speed Diesel ◽  
Engine Type

The necessity of adapting diesel engines to work on vegetable oils is justified. The possibility of using rapeseed oil and its mixtures with petroleum diesel fuel as motor fuels is considered. Experimental studies of fuel injection of small high-speed diesel engine type MD-6 (1 Ch 8,0/7,5)when using diesel oil and rapeseed oil and computational studies of auto-tractor diesel engine type D-245.12 (1 ChN 11/12,5), working on blends of petroleum diesel fuel and rapeseed oil. When switching autotractor diesel engine from diesel fuel to rapeseed oil in the full-fuel mode, the mass cycle fuel supply increased by 12 %, and in the small-size high-speed diesel engine – by about 27 %. From the point of view of the flow of the working process of these diesel engines, changes in other parameters of the fuel injection process are less significant. Keywords diesel engine; petroleum diesel fuel; vegetable oil; rapeseed oil; high pressure fuel pump; fuel injector; sprayer

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