Analysis of fluid-dynamic guidelines in diesel particulate filter sizing for fuel consumption reduction in post-turbo and pre-turbo placement

Abstract

ElsevierSerrano Cruz, JR.; Climent Puchades, H.; Piqueras Cabrera, P.; Angiolini, E. (2014). Analysis of fluid-dynamic guidelines in diesel particulate filter sizing for fuel consumption reduction in post-turbo and pre-turbo placement. Applied Energy. 132:507-523. doi:10.1016/j.apenergy.2014.07.043.Analysis of fluid-dynamic guidelines in diesel particulate filter sizing for fuel consumption reduction in post-turbo and pre-turbo placement AbstractWall-flow particulate filters are in the present days a standard aftertreatment system widely used in diesel engines to reduce particle emissions and meet emission regulations. This paper deals with the analysis of the macro-and meso-geometry definition of the DPF monoliths from a fluid-dynamic modelling approach. Focus is driven to the analysis of the influence on pressure drop and hence on engine fuel economy.The influence of the DPF volume on the engine performance is analysed with a gas dynamic software including both post-turbo and pre-turbo placement under clean and soot loading conditions. A swept in cell density is also considered for different thermal integrity factors. This approach allows analysing the trends in pressure drop and cell unit geometric parameters defining the monolith thermal and mechanical performance. A discussion considering constant specific filtration area and constant filtration area is performed providing a comprehensive understanding of the DPF and engine response as volume and cellular geometry are changed. Results are leading to rigorously justify known but usually empirical guidelines for DPF design in post-turbo applications. A discussion on the potential for monolith volume reduction in pre-turbo applications with respect to the post-turbo baseline is addressed. This is based on the very low sensitivity of fuel consumption and pressure drop both to volume reduction and soot and ash loading with pre-turbo DPF configuration.

Experimental assessment of a pre-turbo aftertreatment configuration in a single stage turbocharged diesel engine. Part 2: Transient operation

“…Details on the model validation under steady-state operating conditions can be found in [42], in which an analysis of DPF sizing in post-turbo and pre-turbo placement is performed. The modelling under transient operation is presented in With the proposed boosting system the target torque is reached instantaneously, as represented in Figure 16(a), recovering the engine driveability.…”

New Leakage Current Particulate Matter Sensor for On-Board Diagnostics

“…But the high PM emission of diesel engine will have great influence on human health and environment [1,2]. Diesel particulate filters (DPF) have been widely used in diesel vehicles to remove PM from exhaust gas and help meet stringent legislation [3][4][5]. On-board diagnostics (OBD) require monitoring of the DPF system for malfunction that may cause PM emission to exceed the regulated levels.…”

Development of an Integrated Virtual Engine Model to Simulate New Standard Testing Cycles

“…The pressure drop sub-model [43,44] takes into account the pressure drop contributions in DPF monolith, which are the flow expansion at DPF monolith, the friction in inlet channel, the pressure drop in particulate layer, the pressure drop in porous wall, the friction in outlet channel and the flow diffusion at DPF monolith outlet. The inlet and outlet monolith boundary conditions (pressure, temperature and gas composition) are provided by the gas dynamics model, so that the DPF model determines the volumetric flow rate.…”