Engine Research and Development
Research in this area analyzes and measures the vibration generated by the reciprocating parts and combustion pressure of the engine in operation, and seeks better ways to reduce it. One major technology area is predictive vibration measurement and analysis utilizing excited forces such as the inertia of the parts and pressure. Another is structural vibration damping, which is applied in the development of systems that optimize the natural frequencies of the engine and reduce vibration by changing its structural shape. Doosan Engine has developed and supplies the ENVA line of steel bracing for this purpose.
Technology for Analyzing and Quantifying Shaft Vibration
The reciprocating parts in the propulsion system, to include crankshafts, connecting rods and pistons, are the source of engine frame vibration as a result of exciting forces generated by inertia and the gas explosion pressure inside the combustion chamber. Doosan Engine has applied computer analysis to measure the vibration of the engine frame, and vibration measurement techniques to verify analysis results and assess the vibration performance of various engine parts.
Structural Vibration Damping Technologies
Vibration caused by the inertia of reciprocating parts and combustion pressure can compromise the safety of the engine frame and is the main source of engine noise. To further elevate engine quality, Doosan Engine has tine-tuned the shapes of parts for better resonance avoidance and developed ENVA top bracing, a steel structure installed between the engine and hull to reduce engine vibration by transmitting the natural frequency of the engine to a range where resonance occurs above normal engine speed.
Engine technologies that promote efficiency, lower fuel consumption and enhance overall eco-friendliness are developed through research on engine combustion and performance analysis and the flow properties of performance parts. Major technologies here include (1) the analysis and measurement of engine combustion and emissions in order to satisfy emissions standards; (2) performance analysis for optimizing engine output, fuel consumption and other performance factors; and (3) flow and cooling analysis for measuring the heat and flow properties of major performance parts.
Combustion and Performance Technologies
The combustion process inside the combustion cylinder and combustion characteristics directly affect fuel consumption and the makeup of exhaust emissions. Doosan Engine applies technologies for analyzing combustion and engine performance as well as for analyzing and measuring emissions in order to develop elevate efficiency, lower fuel consumption and deliver greater eco-friendliness.
Flow and Hydraulics Technologies
The cooling and flow characteristics of major performance parts play an important role in the efficiency and durability of the engine. Our expertise in flow and hydraulics analysis and measurement allow us to analyze and design the optimal cooling, lubrication and fuel injection systems for reliable and efficient system performance.
Key areas here include technologies related to engine frames, materials and lubrication.
Computer simulations are employed to analyze and predict the gas pressure, heat and centrifugal force generated during engine operation and to ensure parts durability. The stresses on the engine during operation are also quantified in order to ensure the analysis techniques are most reliable.
Materials & Lubrication
Materials-related technologies cover the alloy design for large cast parts (impellers, valves) and casting analysis to ensure parts reliability at the time of their fabrication as well as the technologies necessary for localizing the materials used in core engine parts. Importantly, casting analysis is performed with computer simulations to minimize expenses at the initial stage of cast parts development. Analysis method reliability is also improving steadily through better measurement techniques. Lubrication analysis involves analysis technologies for (1) lubricating various bearings to ensure the reliability of reciprocating parts and (2) lightening and optimizing crankshafts, connecting rods and other reciprocating parts.
Doosan Engine is localizing and upgrading various electronic control systems, which serve as the “brain” of the engine, and developing technologies to monitor engine status in real time and prevent breakdowns. One noteworthy achievement is Measutal, a wireless system for measuring crankshaft distortion and generating crankshaft alignment data, facilitating maintenance and repair work.
Electronic Engine Control System
Operation sequence logic is used when starting up and shutting down the engine, while speed control logic enables quieter engine operation. These basic technologies are applied in the process of localizing and upgrading electronic control systems.
Diagnosis System Technologies
Data from various sensors around the engine are used to pinpoint potential problems before them become real problems. Regularly-scheduled engine inspections have been the traditional approach to preventive maintenance, but now inspections can be made whenever symptoms of operational irregularity are discovered, greatly reducing maintenance time and expense. To this end, the Bearing Warning & Control System (B-WACS) and Oil Warning & Control System (O-WACS) have been developed exclusively by Doosan Engine and are now available on the market.
“Expert System” Technologies
Proprietary in-house technologies have been collectively integrated with diagnosis results and technical know-how learned in the field to develop automated diagnosis hardware and software. The range of applications is broad and includes selective catalytic reduction systems as well as engines.