Development of an Electronic Fuel Injection System for a 4-Stroke Locomotive Diesel Engine

2012 ◽  
Author(s):  
Anirudh Gautam ◽  
Prem Chandra ◽  
Kamlesh Kumar ◽  
Mani Ram Sharma ◽  
Sanjeet Kumar ◽  
...  
Keyword(s):  
High Pressure ◽  
Diesel Engine ◽  
Fuel Injection ◽  
Injection System ◽  
Fuel Injection System ◽  
Engine Test ◽  
Diesel Locomotive ◽  
Injection Pump ◽  
Fuel Injection Pump ◽  
Locomotive Diesel

An electronic fuel injection system for a 4-stroke, 16 cylinders, V-configuration, medium speed, large bore locomotive diesel engine has been developed and successfully retrofitted on a rebuilt diesel locomotive. The engine employs a Pump-Line-Nozzle (PLN) system of fuel injection into the cylinder. Original fuel injection system used is a mechanical fuel injection pump connected to a mechanical fuel injector through a high pressure fuel line. The fuel injection pump meters the fuel delivery using a single helix machined on its plunger. The fuel injection timings are however optimized only for the rated speed and load resulting in non-optimised operation at other engine operating points. An electronic fuel injection pump having a solenoid valve for both fuel metering and injection timing along with ECU has been developed for retrofitment on rebuilt diesel locomotives. Interfacing of the ECU to the engine test cell controller has been done by developing suitable hardware and software. ECU calibration has been done and various maps of the engine have been developed. The engine was tested on the engine test bed. High pressure injector, modified fuel headers, fuel connection systems, a new high capacity fuel pump and layout of the wire harness were installed. After thorough testing and debugging, the EFI kit has been retrofitted on a rebuilt diesel locomotive and tested on load box followed by brief field trials. A savings of 4% fuel consumption over the duty cycle has been obtained. In addition there is an appreciable reduction in the smoke emissions during steady-state as well as transient operations.

Design and Development of Double Helix Fuel Injection Pump for Four Stroke V-16 Rail Traction Diesel Engine

2007 ◽  
Author(s):  
A. K. Kathpal ◽  
Anirudh Gautam ◽  
Avinash Kumar Agarwal ◽  
R. Baskaran
Keyword(s):  
Diesel Engine ◽  
Fuel Economy ◽  
Fuel Injection ◽  
Double Helix ◽  
Fuel Efficiency ◽  
Injection System ◽  
Injection Timing ◽  
Fuel Injection System ◽  
Injection Pump ◽  
Fuel Injection Pump

The diesel fuel-injection system of ALCO DLW 251 engine consists of single cylinder injection pumps, delivery pipes, and fuel injector nozzles. Fuel injection into the combustion chamber through multi-hole nozzles delivers designed power and fuel efficiency. The two most important variables in a fuel injection system of a diesel engine are the injection pressure and injection timing. Proper timing of the injection process is essential for satisfactory diesel engine operation and performance. Injection timing needs to be optimised for an engine based on requirements of power, fuel economy, mechanical and thermal loading limitations, smoke and emissions etc. Since each of these requirements varies with the operating conditions, sometimes contrary to the requirements of the other parameters, the map of optimised injection timing can be very complex. The ALCO DLW 251 engine’s fuel injection pump is jerk type to permit accurate metering and timing of the fuel injected. The pump has a ported barrel and constant-stroke plunger incorporating a bottom helix for fuel delivery control with constant injection timing. From the point of view of good power and fuel economy, combustion should take place so that the peak firing pressure occurs at about 10–15° after TDC and is usually a few degrees after combustion starts. For this to happen, fuel should be injected at an appropriate time, depending on Injection delay and Ignition delay. Both these factors are dependent on the speed and load. Changing the operating point of the engine may change either one or both types of delay, altering the moment of start of combustion. Various researchers have shown that both the Injection and the Ignition delay are reduced as the engine speed is decreased resulting in advancement of injection timing at lower speeds (and loads). This condition will be corrected by varying the static injection timing, which can be achieved by providing a modified helix on the plunger to delay the start of fuel injection, for the lower speeds and loads. A new double helix (upper and lower helix) fuel injection pump for the ALCO DLW 251 16 V engine has been designed. The new fuel injection pump has been tested on the engine test cell at Research Designs & Standards Organisation and has shown an improvement of 1.2% in locomotive duty cycle fuel consumption. This paper describes the design & development of double helix fuel injection pump and discusses the engine tests completed to verify the projected improvements in fuel efficiency.

Effects on Locomotive Diesel Engine Performance by Selecting Solenoid Valve Parameters

2011 ◽  
Vol 467-469 ◽  
pp. 140-145
Author(s):  
Ming Hai Li ◽  
Feng Jiang
Keyword(s):  
Diesel Engine ◽  
Fuel Injection ◽  
Engine Performance ◽  
Solenoid Valve ◽  
Optimal Combination ◽  
Injection System ◽  
Fuel Injection System ◽  
Drive Current ◽  
Experimental Values ◽  
Locomotive Diesel

Solenoid valve is the key component to determine the performance of electronic fuel injection system for the diesel engine. By theoretically analyzing the characteristics of solenoid valve driver, we found out that one of the factors that affect the closing and opening speed of solenoid valve is drive current. In this paper, GT-Flow software is used to simulate and analyze the drive current, and come to the optimal combination of current. The selected drive current is used to analyze the emission performance of 16V265H diesel engine, to determine the best advance angle for fuel supply, and to compare the simulation results with the experimental values.

Model-Based Optimization and Pressure Fluctuation Control of Pressure Reservoir in Electrically Controlled Fuel Injection System for Single Cylinder Diesel Engine

2017 ◽  
Author(s):  
Ke Zhang ◽  
Zhifeng Xie ◽  
Ming Zhou
Keyword(s):  
High Pressure ◽  
Diesel Engine ◽  
Diesel Engines ◽  
Pressure Fluctuation ◽  
Fuel Injection ◽  
Common Rail ◽  
Installation Space ◽  
Injection System ◽  
Fuel Injection System ◽  
Single Cylinder

Single-cylinder diesel engines usually employ mechanically actuated or time-type electrically controlled fuel injection systems. But due to the lack of flexibility to provide high pressure and fully varying injection parameters, fuel efficiency and emissions are poor. Although modern multi-cylinder engines have employed high pressure common rail fuel injection system for a long time, this technology has not been demonstrated in single-cylinder diesel engines. Due to the small installation space and little fuel injection amount of single cylinder diesel engine, high pressure common rail fuel injection system cannot be employed directly. In this study an electrically controlled high pressure fuel injection system of time-pressure-type (PTFS) for single-cylinder diesel engine was demonstrated. PTFS integrated the fuel pump and pressure reservoir (PR) to reduce installation space, which enabled it to match various kinds of single-cylinder diesel engines. However, the volume of the PR of PTFS is still limited, leading to obvious pressure fluctuation induced by periodic fuel pumping and injection. Pressure fluctuation might affect the stability and consistency of fuel injection, deteriorating the combustion and emissions of the engine further. This work established a mathematical model for the system, and studied the effect of the main parameters of the PR to the pressure fluctuations in the PR. The structure and dimensions of the system were optimized and a damping mechanism was proposed to reduce the pressure fluctuation. The optimized pressure fluctuation of PTFS achieved an acceptable level which can support steady and effective fuel injection. As a result, the fuel consumption efficiency and emission level of single cylinder diesel engine were enhanced.

Improvement of fuel injection system of locomotive diesel engine

2009 ◽  
Vol 21 ◽  
pp. S139-S141 ◽  
Author(s):  
Minghai LI ◽  
Hongjiang CUI ◽  
Juan WANG ◽  
Ying GUAN
Keyword(s):  
Diesel Engine ◽  
Fuel Injection ◽  
Injection System ◽  
Fuel Injection System ◽  
Locomotive Diesel
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