The analysis and management of Wärtsilä engine control system-9520

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1 International ymposium on omputers & Informatics (II 015) The analysis and management of Wärtsilä engine control system-950 Yuan Renmin aritime ollege, handong Jiaotong University, Weihai 6400, handong, hina bstract. In recent years, Wärtsilä RT-flex series electronic control diesel engine are increasingly applied to the ship.in order to make more safely and effectively to use, maintenance and management of the diesel engine, this paper mainly take 6RT-flex48T- diesel engine as an example to introduce the RT-flex series electronic control diesel engine control system. Keywords:RT - flex;electronic control technology;arine diesel engine;ontrol system;use the management Introduction With the development of electronic control technology, control and monitoring of electronic control technology is more and more widely used in marine power plant.the RT-flex concept is based on the Wärtsilä common rail.using electronic common rail control technology,the whole design of intelligent, modular. In the aspect of energy saving, environmental protection, reliability, security and flexibility than the previous models has been greatly improved, in line with the current energy efficiency control and emission standard. The composition of the control system RT-flex48T- diesel engine is used in the WE-950 control system.the system adopts microcomputer control technology and fieldbus technology is mature, the realization of electronic control and monitoring of diesel engine. The redundant set are used in the module settings and distribution to ensure the reliability of bus. The composition and the connection of WE-950 control system shown in fig.1 and fig The authors - Published by tlantis Press 943

2 The control system of Flex function unit s shown in Figure 1 the WE-950 control system of Flex junction box mainly comprises:a power box(e85), electrical rail box (E95.01~06), power distribution and external communication junction box(e90), local operation junction box(e5), cylinder pulse lubricating junction box(e41.01~06), the crank angle of the junction box(e96.1 and E96.) and flexview software computer etc. In figure E95.01~05 only painted on the connection machine control function, 09~88 terminals with cylinder control function in E ontrol and safety alarm unit s shown in Figure control and safety alarm connection box mainly comprises: a servo oil self-cleaning filter junction box(e9), piston cooling oil monitoring terminal box(e111.1~3), piston cooling oil flow monitoring terminal box(e8, E8.01~06), engine speed detection and junction box(e0), super charger monitoring terminal box(e31), signal acquisition box(e110, E10.1~, E1,E114.1), diesel engine safety junction box(e10). The function of the control system The main functions of the control system are: common rail control, cylinder pulse lubricating control, fuel injection control, exhaust valve control, start valve control, crank angle detection etc. ommon rail control 6RT-flex48T- type diesel engine fuel supply unit has fuel pump and the servo oil pump, hanging in the output end of the machine, directly through the crankshaft gear drives. 944

3 From B From EB 0V 0V E90 E95.01 E B U main starting 39/40 electromagnetic39/40 valve 94/95 R 1 oil servo signal detection /95 E I 1 LK I 1 T I LK I T 1 B U ER WE950 manual control panel ER E aneuvring unit /90 94/ WE fault B U 3 ylinder oiling fault Fuel pump 9/93 actuator 9/93 position set point 1 79/80 Fuel common 79/80 rail 1 35/36 35/36 ctuator servo oil pump turning gear ia disengaged 1 cavenging gas collector B U 4 E96.1 1/ /90 5/6 1 B1 1 B B T 3/ E5 94/ E95.03 E95.04 E I L K Fuel pump ctuator I T Power or torque L ylinder oiling From E0 E T E E I L K I T ylinder oiling 11/1olenoid valve L ylinder oil E :Exhaust common rail valve open 13-16:Exhaust common rail valveclose 17-0:1common rail injection valve inject 1-4:1common rail injection valve return 5-8:common rail injection valve inject 9-3:common rail injection valve return 33-34:the start pilot valve of ylinder 68-7:The exhaust valve position signal 86-88:Fuel injection quantity signal flexview computer -UB ER conversion Fig.1 6RT-flex48T- diesel engine WE950 Junction box wiring diagram 945

4 E111.1 E111. E111.3 The servo oil self-cleaning filter failure 5 6ylinder piston cooling oil outlet E1 E9 1 ylinder piston cooling oil outlet 3 4ylinder piston cooling oil outlet cavenge box E95.03 E95.04 ylinder liner cooling water inlet The air cooler cooling water inlet Piston cooling oil inlet upply unit fuel inlet ir spring ontrol air ooling water inlet switch Lubricating oil inlet switch ir spring switch tarting air E114.1 ir cooler separator condensate liquid level switch. Four liquid level switch is normally closed contacts in series. E110 The servo oil self-cleaning filter failure The servo oil unit leakage 1 The servo oil pump flow The outlet of the thrust bearing lubricating oil The axial damper back-end oil The axial damper fore-end oil upply unit fuel inlet Leakage of fuel oil supply unit ommon rail unit total leakage The fuel injection control unit/fuel pipe leaks cylinder the of charge air 1 ylinder piston cooling oil outlet 3 4ylinder piston cooling oil outlet 5 6ylinder piston cooling oil outlet E10.1 ylinder liner cooling water inlet The air cooler cooling water inlet Piston cooling oil inlet upply unit fuel inlet ir spring ontrol air ain bearing lubricating oil inlet ervo hydraulic cylinder lubrication ervo cylinder lubrication oil spill oil The cylinder lubricating oil filter difference ir spring lubricating oil leakage liquid level switch ir cooler condensate water leakage switch m o ro r ito n o m speed measurement sensor T5101 speed measurement sensor T510 speed measurement sensor T5103 speed measurement sensor T5104 speed measurement sensor T5111 speed measurement sensor T511 E T signal E0 E10. Jacket cooling water inlet 1-6 cylinder cooling water outlet ir cooler cooling water inlet ir cooler cooling water outlet cavenging after air cooler 1-6 ylinder exhaust exhaust before turbo-charger exhaust after turbo-charger The turbo-charger outlet of the lubricating oil The turbo-charger lubricating oil inlet E31 The turbo-charger outlet of the lubricating oil The turbo-charger lubricating oil inlet The turbo-charger speed The turbo-charger oil inlet switch E5 ource from E95.04 connect 04 uxiliary blower starting order uxiliary blower runing indicator engine room order ain engine revolution indicator Emergency stop button E8.01 E8 1Piston cooling oil flow switch 1Piston cooling oil switch E8.0 Piston cooling oil flow switch Piston cooling oil switch E8.03 3Piston cooling oil flow switch 3Piston cooling oil switch E8.04 4Piston cooling oil flow switch 4Piston cooling oil switch E8.05 5Piston cooling oil flow switch 5Piston cooling oil switch E8.06 6Piston cooling oil flow switch 6Piston cooling oil switch E10 1/ 3/4 5/6 7/8 9/1 0 11/1 Fuel stop valve Turning machine off switch position Thrust bearing lubricating oil outlet switch The main starting valve closed position switch The supercharger oil import switch turbo-charger speed ylinder liner cooling water inlet switch ain bearing lubricating oil inlet switch ir spring switch The main starting valve before starting air ro p e h T Fig. 6RT-flex48T- diesel engine control safety alarm junction box wiring diagram The common rail fuel is changed with the diesel engine load has been shown in fig.3.we-950 according to engine speed and fuel command, calculate the diesel engine load and calculated according to the load size to generate a setpoint signal, by F-0 3 and 4 module compared to two sets of common rail sensor detects the value and the external control system of fuel instruction to calculate fuel pump actuator 946

5 adjustment instruction, by Woodward oil amount adjustment actuators pull the fuel pump rack. Fig. 3 the common rail fuel set value The control of servo oil is also based on engine load changes, the set value signals produced by F-0 3 and 4 respectively control control mechanism of two servo pumps.ervo oil common rail is feedback to F-0 1 and respectively detected by two sensors.the common rail was controlled between 80~190bar. Electronic cylinder pulse lubricating ylinder lubrication system is by F-0 5 and 6 according to the crank angle signal and the diesel engine load issued injection timing and fuel injection quantity control commands to the L-0 1~6 control injector solenoid valve to perform the oiling action.nd by the oil sensor feedback oiling success. Fuel injection control Each cylinder F-0 odule according to the fuel command, crank angle signals and from the governing system received their timing calculation.before the T, considering the VIT and FQ signals, calculate the precise injection angle, and the issue of fuel injection start and end of the instruction to the two common rail fuel valve to control fuel injection action IU. Exhaust valve control The exhaust valve is opened by the servo hydraulic, and closed by an air spring. Exhaust valve stem movement monitored by the position sensor, 947

6 and give feedback to the control module. The start valve control The two main starting electromagnetic valve is respectively controled by F-01 and according to the remote control system command sends control signal. The using and management The system control module In the process of using the machine vibration is caused extremely easily loose system terminal, work pay attention to frequently check terminal. If the system is abnormal but after inspection found no cause of the malfunction, can be in this module off a few seconds, and then resupply. If normal, you can continue to use.if there are problems, replace the standby module. Fuel pump actuator In the daily maintenance, through the Fuel Pump ctuators Position Test command in the flexview user interface to test fuel pump actuator action, can test three positions:0%, 50%, 100%. In the diesel engine operation process, can be manually forcing one actuator mechanism, observation of another actuator whether automatic adjustment to the opposite direction, let go after two and will automatically return to the original position. If one actuator fault available special tools (distance piece) the fuel pump rack fixed position in 0, 50% or 100%, the fuel supply at this time is not adjustable, common rail is adjusted by another, diesel engine load were restricted to 0~40%, 0~80%, 40~100%. ommon rail valve ommon rail valve is a bistable uses high speed response of the position 3 way valve. ccording to the rules given in the WE-950 directives, common railvalve coil to produce a high current pulse in a short period of time(50~60), the spool moves about 0.3mm displacement. Large current pulse and short spool displacement ensures a very short reaction time, so as to achieve precise control of fuel injection and exhaust valve. 948

7 Parameter adjustment The control flexibility of electronically controlled diesel engine lies in through flexview can be adjusted conveniently on the important control parameters, to improve the work performance. Base Feed : the six cylinder rated load quantity of oil injection respectively adjusted, can use the "et all" to modify the six cylinder unity. The adjusting range of feed rate is 0.6g/kwh~1.6g/kwh, the value is out of range will be displayed in red. n the basis of actual feed rate with the diesel engine load and variable. Exvclosing ffset :By changing a cylinder exhaust valve closing angle, to balance the cylinder compression. The adjusting range of the parameters for -3.0~+3.0<0, six cylinder compensation value average value should be between -0.~+0.<0. InjBegin ffset :By changing a cylinder fuel injection angle to regulate the detonation of each cylinder, load balance. Fuel injection angle compensation is divided into two levels: -0.5~+0.5<0, -1.5~+1.5<0. The six cylinder compensation value average value should be between -0.~+0.<0. ummary ow the new ship in the host application more and more electronic control diesel engine, electronic control diesel engine technology is becoming more and more perfect. The engineers to learn and understand the electronic control technology for diesel engine. Believe that with the continuous improvement of this series diesel engine knowledge and the accumulation of management experience, the electronically controlled diesel engine can fully play the advantages. Reference [1] Wärtsilä witzerland Ltd.Wärtsilä RT-flex48T- perating anual []. 01. [] Wärtsilä witzerland Ltd.Wärtsilä RT-flex48T- aintenance anual []. 949

8 01. [3] Wärtsilä witzerland Ltd. perator flexview anual Revision 3.0 [].01. [4] Wärtsilä witzerland Ltd, RT-flex Training:Function of the LU-4 Pulse Feed ylinder Lubrication ystem[] [5] Wärtsilä Land & ea cademy.rt-flex Training:RT-flex Bus ystems 950