scholarly journals PREVENTIVE STRATEGY OF MAINTENANCE OF ELEMENTS IN WORKING CONDITION OF FUEL SYSTEM COMMON RAIL

2018 ◽  
Keyword(s):  
Working Condition ◽  
Common Rail ◽  
Preventive Strategy ◽  
Fuel System

Influence of deforming of common rail diesel injectors parts on the fuel injection process

2021 ◽  
pp. 4-12
Author(s):  
Keyword(s):  
High Pressures ◽  
Fuel Injection ◽  
Experimental Studies ◽  
Common Rail ◽  
Electronic Control ◽  
Fuel System ◽  
Fuel Supply ◽  
Injection Process ◽  
Injection Cycle

Experimental studies have revealed a significant impact of deformation of Сommon Rail injector parts on the fuel supply process. High pressures alter the structure of the fuel supply cy-cle. Theforward front of the fuel supply cycle begins with the stage of unloading the deformed parts of the injector. The rear front of the fuel supply cycle ends with the stage of deformation of the injector parts. The calculated and experimental determination of cyclic fuel supply gave similar results. The developed method of determining the duration of the injection cycle stages creates a basis for experimental verification of mathematical models. Keywords: injector, Common Rail, diesel, fuel system, electronic control, needle, fuel injection

scholarly journals Electronic control unit development and emissions evaluation for hydrogen–diesel dual-fuel engines

2018 ◽  
Vol 10 (12) ◽  
pp. 168781401881407
Author(s):  
Yasin Karagöz ◽  
Majid Mohammad Sadeghi
Keyword(s):  
Diesel Engines ◽  
Working Condition ◽  
Electronic Control Unit ◽  
Control Unit ◽  
Dual Fuel ◽  
Hydrogen Energy ◽  
Compression Ignition ◽  
Electronic Control ◽  
Fuel System ◽  
Compression Ignition Engines

In this study, it was aimed to operate today’s compression ignition engines easily in dual-fuel mode with a developed electronic control unit. Especially, diesel engines with mechanical fuel system can be easily converted to common-rail fuel system with a developed electronic control unit. Also, with this developed electronic control unit, old technology compression ignition engines can be turned into dual-fuel mode easily. Thus, thanks to the flexibility of engine maps to be loaded into the electronic control unit, diesel engines can conveniently be operated with alternative gas fuels and diesel dual fuel. In particular, hydrogen, an alternative, environmentally friendly, and clean gas fuel, can easily be used with diesel engines by pilot spraying. Software and hardware development of electronic control unit are made, in order to operate a diesel engine with diesel+hydrogen dual fuel. Finally, developed electronic control unit was reviewed on 1500 r/min stable engine speed on different hydrogen energy rates (0%, 15%, 30%, and 45% hydrogen) according to thermic efficiency and emissions (CO, total unburned hydrocarbons, NOx, and smoke), and apart from NOx emissions, a significant improvement has been obtained. There was no increased NOx emission on 15% hydrogen working condition; however, on 45% hydrogen working condition, a dramatic increase arose.

scholarly journals Development of a Generic Dual Fuel ECU for Common Rail Diesel Engine Control

2021 ◽  
Author(s):  
◽  
Luke James Frogley
Keyword(s):  
Diesel Engine ◽  
Diesel Fuel ◽  
Fuel Injection ◽  
Electronic Control Unit ◽  
Control Unit ◽  
Common Rail ◽  
Dual Fuel ◽  
Fuel System ◽  
Compressed Natural Gas ◽  
Diesel Operation

<p>Rising costs of diesel fuel has led to an increased interest in dual fuel diesel engine conversion, which can offset diesel consumption though the simultaneous combustion of a secondary gaseous fuel. This system offers benefits both environmentally and financially in an increasingly energy-conscious society. Dual fuel engine conversions have previously been fitted to mechanical injection systems, requiring physical modification of the fuel pump. The aim of this work is to develop a novel electronic dual fuel control system that may be installed on any modern diesel engine using common rail fuel injection with solenoid injector valves, eliminating the need for mechanical modification of the diesel fuel system.  The dual fuel electronic control unit developed replaces up to 90 percent of the diesel fuel required with cleaner-burning and cheaper compressed natural gas, providing the same power output with lower greenhouse gas emissions than pure diesel. The dual fuel system developed controls the flow of diesel, gas, air, and engine timing to ensure combustion is optimised to maintain a specific torque at a given speed and demand. During controlled experimental analysis, the dual fuel system exceeded the target substitution rate of 90 precent, with a peak diesel substitution achieved of 97 percent, whilst maintaining the same torque performance of the engine under diesel operation.</p>

DIAGNOSIS OF INJECTORS THROUGH COMMON RAIL PRESSURE MEASUREMENT

2011 ◽  
Vol 159 (1) ◽  
pp. 110-122
Author(s):  
Mirosław KARCZEWSKI ◽  
Krzysztof KOLIŃSKI
Keyword(s):  
Pressure Sensor ◽  
Pressure Measurement ◽  
Common Rail ◽  
Diagnostic Methods ◽  
Fuel System ◽  
Rail Pressure ◽  
Dynamic Changes ◽  
Common Rail Pressure ◽  
The Common ◽  
Pressure Changes

More and more compress engines contain common rail fuel systems. This type of fuel systems injectors are supplied with high pressurised petroleum from the common rail. Dynamic changes of pressure in rail are caused by injection events and fuel supply. The pressure sensor mounted by manufactures in the common rail enables observing and measuring changes in pressure. Pressure changes depend on the phenomena occurring during injection and pumping processes. Every change in each process influences pressure changes in the common rail. The aim of the paper is to elaborate on diagnostic methods of the C-R fuel system based on dynamic changes of pressure in the rail.

Fuel System Response of a Common Rail Passenger Car Engine Fuelled with Palm Oil Biodiesel

2014 ◽  
Vol 699 ◽  
pp. 528-533
Author(s):  
M. Adlan Abdullah ◽  
Farid Nasir Ani ◽  
Masjuki Hassan
Keyword(s):  
Control System ◽  
Palm Oil ◽  
Injection Pressure ◽  
Common Rail ◽  
System Response ◽  
Injection Timing ◽  
Engine Control ◽  
Fuel System ◽  
Passenger Car ◽  
Engine Control System

This study investigated the effects of palm oil methyl ester blends on a common rail passenger car engine in terms of changes in the fuel system response. Up to 40% biodiesel blend was used in this study. Operating on biodiesel causes the engine control system to modify the injection parameters by increasing the injection pressure and duration while advancing the start of injection timing for the same power output. This engine control system-response to biodiesel is due to the inherent low energy density of biodiesel. Low and medium speed/load region was proposed as an area where improvement by injection strategies optimization can be made.

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