Computational Investigation on the Performance Increase of a Small Industrial Diesel Engine Regarding the Effects of Compression Ratio, Piston Bowl Shape and Injection Strategy

This paper describes the simulative approach to calibrate an already extremely highly turbocharged industrial diesel engine for higher low-speed torque. The engine, which is operating at its cylinder-pressure maximum, achieve close 30 bar effective mean pressure through suitable calibration between compression ratio, piston-bowl shape and injection strategy. basic idea of study lower ratio even masses boost pressures, with resulting disadvantages in area emissions fuel consumption being partially compensated by optimizations areas piston simulations primarily involve use 3D CFD software Converge in-cylinder a fully predictive 1D full-engine model GT Suite. are based on two-stage 1950 cc four-cylinder used validation initial simulation. With maximum increase mass pressure, could be increased up 28 bar, while specific only slightly. Depending geometry, NOx or CO UHC reduced.