Development and Demonstration of Control Strategies for a Common Rail Direct Injection Armoured Fighting Vehicle Engine

<p class="Abstract">The development of a controller which can be used for engines used in armoured fighting vehicles is discussed. This involved choosing a state of the art reference common rail automotive Diesel engine and setting-up of a transient engine testing facility. The dynamometer through special real-time software was controlled to vary the engine speed and throttle position. The reference engine was first tested with its stock ECU and its bounds of operation were identified. Several software modules were developed in-house in stages and evaluated on special test benches before being integrated and tested on the reference engine. Complete engine control software was thus developed in Simulink and flashed on to an open engine controller which was then interfaced with the engine. The developed control software includes strategies for closed loop control of fuel rail pressure, boost pressure, idle speed, coolant temperature based engine de-rating, control of fuel injection timing, duration and number of injections per cycle based on engine speed and driver input. The developed control algorithms also facilitated online calibration of engine maps and manual over-ride and control of engine parameters whenever required. The software was further tuned under transient conditions on the actual engine for close control of various parameters including rail pressure, idling speed and boost pressure. Finally, the developed control strategies were successfully demonstrated and validated on the reference engine being loaded on customised transient cycles on the transient engine testing facility with inputs based on military driving conditions. The developed controller can be scaled up for armoured fighting vehicle engines.</p>

Download Full-text

Effects of injection timing and rail pressure on particulate size-number distribution of a common rail DI engine fueled with fischer-tropsch diesel synthesized from coal

Journal of the Energy Institute ◽

10.1016/j.joei.2020.08.008 ◽

2020 ◽

Cited By ~ 2

Author(s):

Limin Geng ◽

Yonggang Xiao ◽

Shijie Li ◽

Hao Chen ◽

Xubo Chen

Keyword(s):

Common Rail ◽

Injection Timing ◽

Rail Pressure ◽

Fischer Tropsch ◽

Number Distribution ◽

Size Number ◽

Particulate Size

Download Full-text

The Effects of Injection Parameters on the Performance of Common Rail Light Duty Engine Fueled with Palm Oil Biodiesel

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.465-466.322 ◽

2013 ◽

Vol 465-466 ◽

pp. 322-326 ◽

Cited By ~ 2

Author(s):

M. Adlan Abdullah ◽

Farid Nasir Ani ◽

Masjuki Hassan

Keyword(s):

Diesel Engine ◽

Palm Oil ◽

Fuel Economy ◽

Fuel Injection ◽

Control Strategies ◽

Engine Performance ◽

Common Rail ◽

Injection Timing ◽

Injection Duration ◽

Injection Parameters

It is in the interest of proponents of biodiesel to increase the utilization of the renewable fuel. The similarities of the methyl ester properties to diesel fuel and its miscibility proved to be an attractive advantage. It is however generally accepted that there are some performance and emissions deficit when a diesel engine is operated with biodiesel. There are research efforts to improve the diesel engine design to optimize the combustion with biodiesel. Since the common rail engines operates on flexible injection strategies, there exist an opportunity to improve engine performance and offset the fuel economy deficit by means of optimizing the engine control strategies. This approach may prove to be more practical and easily implemented. This study investigated the effects of the fuel injection parameters - rail pressure, injection duration and injection timing - on a common rail passenger car engine in terms of the fuel economy. Palm oil based biodiesel up to 30% blend in diesel was used in this study. The end of injection, (EOI), was found to be the most important parameter for affecting fuel consumption and thermal efficiency.

Download Full-text

The Study of the Rail Pressure Control Strategies for Common Rail Diesel Engine

2016 IEEE Vehicle Power and Propulsion Conference (VPPC) ◽

10.1109/vppc.2016.7791802 ◽

2016 ◽

Author(s):

Hong-Rong Wang ◽

Heng Zhang ◽

Peng-Yi Deng

Keyword(s):

Diesel Engine ◽

Control Strategies ◽

Pressure Control ◽

Common Rail ◽

Rail Pressure ◽

Rail Pressure Control

Download Full-text

Heat Losses from a Divided-Chamber Diesel Engine

Proceedings of the Institution of Mechanical Engineers Part C Journal of Mechanical Engineering Science ◽

10.1243/pime_proc_1983_197_090_02 ◽

1983 ◽

Vol 197 (3) ◽

pp. 151-158 ◽

Cited By ~ 4

Author(s):

A C Alkidas ◽

R M Cole

Keyword(s):

Diesel Engine ◽

Heat Loss ◽

Engine Speed ◽

Cylinder Liner ◽

Coolant Temperature ◽

Injection Timing ◽

Intake Port ◽

Exhaust Port ◽

Heat Rejection ◽

The Individual

The various components of heat loss were investigated in a single-cylinder divided-chamber diesel engine. The effects of engine speed, air/fuel ratio, injection timing, intake air temperature and coolant temperature on the heat rejection to the coolant were examined. The magnitudes of heat rejections to the coolant and to the individual cooling zones (cylinder liner, intake port, exhaust port and antechamber) were found to be related primarily to the rate of fuel consumption. The contributions of piston friction and exhaust port heat transfer to heat rejection to the coolant and the magnitude of heat loss from the exterior surfaces of the engine to the surroundings were also evaluated.

Download Full-text

Effects of injection timing and rail pressure on combustion characteristics and cyclic variations of a common rail DI engine fuelled with F-T diesel synthesized from coal

Journal of the Energy Institute ◽

10.1016/j.joei.2020.05.009 ◽

2020 ◽

Vol 93 (6) ◽

pp. 2148-2162 ◽

Cited By ~ 2

Author(s):

Limin Geng ◽

Shijie Li ◽

Yonggang Xiao ◽

Yuantao Xie ◽

Hao Chen ◽

...

Keyword(s):

Combustion Characteristics ◽

Common Rail ◽

Injection Timing ◽

Rail Pressure ◽

Cyclic Variations

Download Full-text

Adaptation of Water Emulsified Fuel by the Common Rail Pressure and Injection Timing

The Proceedings of Conference of Kyushu Branch ◽

10.1299/jsmekyushu.2017.70.209 ◽

2017 ◽

Vol 2017.70 (0) ◽

pp. 209

Author(s):

Kenta YAMADA ◽

Atsuyoshi TAKAYAMA ◽

Yusei MUROYA ◽

Keisuke MATSUNAGA

Keyword(s):

Common Rail ◽

Injection Timing ◽

Rail Pressure ◽

Emulsified Fuel ◽

Common Rail Pressure ◽

The Common

Download Full-text

Injection control strategy of diesel engine based on speed segment PID and operating parameter adaptation

Journal of Computational Methods in Sciences and Engineering ◽

10.3233/jcm-215378 ◽

2021 ◽

pp. 1-18

Author(s):

Guojin Chen ◽

Jiawen Wang ◽

Chang Chen ◽

Yiming Yuan ◽

Long Xu

Keyword(s):

Diesel Engine ◽

Fuel Injection ◽

Operating Parameter ◽

Common Rail ◽

Injection System ◽

Injection Timing ◽

Engine Fuel ◽

Rail Pressure ◽

Injection Quantity ◽

Injection Control

Aiming at the problems of low precision, poor anti-interference and poor follow-up in the control parameters for the diesel engine fuel injection system, this paper studies the control method of the high-pressure common rail electronic control fuel injection system of the diesel engine, constructs the high-pressure common rail fuel injection control system based on the ECU, and establishes the speed segment PID control model of fuel injection quantity, common rail pressure, fuel injection timing and fuel injection rate by using MATLAB/Simulink. The fuel injection quantity and timing are simulated. In order to realize all-round and flexible control of the diesel engine under different working conditions, and to achieve the desired optimal performance in all aspects, the optimization control method of the injection law for the diesel engine is studied. The diesel engine fuel injection control strategy based on speed segment PID and operating parameter adaptation is proposed to realize precise control of the common rail pressure, injection quantity, injection timing and injection rate under different working conditions. The simulation calculation and bench test show that the maximum fluctuation of rail pressure at idle speed is only 5 MPa, and the time to reach stability is only 1.25 s, which greatly improves the control accuracy, anti-interference and follow-up ability of the injection parameters.

Download Full-text

The Study on Control Strategy of Rail Pressure in the Starting Process for Common Rail Diesel Engine

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.588-589.273 ◽

2012 ◽

Vol 588-589 ◽

pp. 273-277

Author(s):

Xian Qiang Liu ◽

Jia Yi Du ◽

Yin Nan Yuan ◽

Lei Zhu

Keyword(s):

High Pressure ◽

Diesel Engine ◽

Control Strategy ◽

Engine Speed ◽

Initial Period ◽

Common Rail ◽

Experimental Results ◽

Rail Pressure ◽

Idle Speed ◽

Starting Process

The analysis on the characteristics of each period in the starting process for common rail diesel engine was carried out. Rail pressure simulation model in the starting process was set by Matlab/Simulink. And rail pressure was tested in 4JB1 high pressure common rail diesel engine. The experimental results showed that idle rail pressure and engine speed fluctuated severely. Solution to correction of duty of metering unit(MeUn) at initial period was proposed, and effect of dragged laps on duty of MeUn was added in control strategy. The improved experimental results showed that amplitude of rail pressure fluctuation was very small and idle speed was no longer overshoot. The performance of diesel engine in the starting process has been greatly improved.

Download Full-text

Implementation of Common Rail Direct Injection System and Optimization of Fuel Injector Parameters in an Experimental Single-Cylinder Diesel Engine

Processes ◽

10.3390/pr8091122 ◽

2020 ◽

Vol 8 (9) ◽

pp. 1122

Author(s):

Yew Heng Teoh ◽

Heoy Geok How ◽

Ching Guan Peh ◽

Thanh Danh Le ◽

Huu Tho Nguyen

Keyword(s):

Diesel Engine ◽

Duty Cycle ◽

Direct Injection ◽

Common Rail ◽

Injection System ◽

Injection Timing ◽

Multiple Injection ◽

Fuel Injector ◽

Rail Pressure ◽

Open Time

The diesel engine is one of the solutions to slow down fossil fuel depletion due to its high efficiency. However, its high pollutant emission limits its usage in many fields. To improve its efficiency and emissions, a conventional mechanical fuel injection system (MFI) was be replaced with common rail direct injection (CRDI) system for the purpose of this study. In this way, injection parameters such as injection timing, injection pressure and multiple injection schemes can be tuned to enhance the engine performance. The rail pressure and engine speed response of the modified diesel engine was tested. It was found that by advancing the start of injection timing (SOI) timing or increasing the rail pressure, the brake torque generated can be increased. Multiple injection schemes can be implemented to reduce the peak heat release rate (HRR). Post injection was observed to increase the late combustion HRR. The maximum pressure rise rate (PRR) can be reduced by applying pilot injection. Further research was conducted on optimizing fuel injector parameters to improve the indicated mean effective pressure (IMEP) consistency and reduce injector power consumption. The consistency of IMEP was indicated by coefficient of variation (CoV) of IMEP. The injector parameters included open time, low time and duty cycle of injector signals. These parameters were optimized by carrying out response surface methodology. The optimized parameters were observed to be 230 µs for open time, 53µs for low time and 27.5% for duty cycle. The percentage of error of CoV of IMEP and injector power were found to be lower than 5% when the predicted results are compared with experimental results.

Download Full-text