Martin Mohr, 27.1.2003 PARTICULATES WP 500 EMPA contribution –WP 550 Investigation of sub-zero cold start effects.

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Presentation transcript:

Martin Mohr, PARTICULATES WP 500 EMPA contribution –WP 550 Investigation of sub-zero cold start effects

Martin Mohr, Tested vehicles Gasoline: –Renault Mégane, V –Alfa 147, 2.0 TS 16 V –Toyota Avensis (direct injected) Diesel: –Ford Galaxy, 1.9 TD –Peugeot 406, 2.0 HDI/FAP (particle trap)

Martin Mohr, Test Programme Test cycles: –CADC (urban, road, highway) - warm starts –ACU - cold starts –NEDC (+23 °C only) –50 km/h, 10 minutes –120 km/h, 10 minutes Temperatures: -20°C, -7°C, and 23°C –Lube oil temperatures for warm start: > 90°C Tests per configuration: 2-3 Fuel: –Gasoline: Artemis (~33 ppm S) –Diesel: Particulates D4 (~8 ppm S)

Martin Mohr, Instrumentation Wet branch –CPC/SMPS (TSI 3022) –DC (Matter LQ1) –Impactor (Dekati DGI) Dry branch –ELPI (w/o filter stage) –CPC (TSI 3022A) CVS –filter sampling for gravimetric analysis Chemical analysis –SOF-INSOF: 57 filter pairs (from CVS) –PAH: 58 filter pairs (from CVS) (U. Stockholm)

Martin Mohr, Set-up ELPI EMPA CPC 358 EMPA CPC 358 EMPA Primary Diluter DGI Dekati Volume Gasdetecto r EMPA external pump 0.28 lpm pump 2.69 lpm pump 0.32 lpm pump 2.09 lpm DC EMPA Injector Injector 3 EMPA TD Dekati Injector 1 Palas DMA EMPA Gasdetecto r EMPA

Martin Mohr, Tested vehicles Set-Up

Martin Mohr, Porous tube - dilution ratio ACU (first 900 s) Renault Mégane, V Gasoline Ford Galaxy, 1.9 TD Diesel 10 Hz DR as determined by CO2 conc.

Martin Mohr, Porous tube - dilution ratio ACU 10 Hz Renault Mégane, V Gasoline

Martin Mohr, Porous tube - dilution ratio ACU Ford Galaxy 1.9 TD Diesel 10 Hz

Martin Mohr, Pressure ACU Renault Mégane, V Gasoline

Martin Mohr, Pressure ACU Ford Galaxy, 1.9 TD Diesel

Martin Mohr, Porous tube - dilution ratio CADC Renault Mégane, V Gasoline

Martin Mohr, Porous tube - dilution ratio CADC Ford Galaxy, 1.9 TD Diesel

Martin Mohr, Pressure CADC Renault Mégane, V Gasoline Ford Galaxy, 1.9 TD Diesel

Martin Mohr, accumulated % over ACU -20°C Renault Mégane, V Gasoline Ford Galaxy, 1.9 TD Diesel

Martin Mohr, accumulated % over CADC -20°C Renault Mégane, V Gasoline Ford Galaxy, 1.9 TD Diesel

Martin Mohr, CADC Renault Mégane, Gasoline 23°C-7°C -20°C single test runs

Martin Mohr, CADC Ford Galaxy, Diesel 23°C-7°C -20°C single test runs

Martin Mohr, km/h Renault Mégane, Gasoline 23°C-7°C -20°C

Martin Mohr, km/h Renault Mégane, Gasoline 23°C-7°C -20°C

Martin Mohr, Ford Galaxy, Diesel 120 km/h 23°C-20°C

Martin Mohr, Ford Galaxy, Diesel 120 km/h 23°C-20°C

Martin Mohr, Gravimetry CVS for ACU Renault Mégane, V Gasoline Bag 1Bag 2Bag 3

Martin Mohr, Gravimetry CVS for ACU Ford Galaxy, 1.9 TD Diesel

Martin Mohr, DGI - ACU -20°C-7°C 23°C Renault Mégane, V Gasoline

Martin Mohr, DGI - ACU -20°C-7°C 23°C Ford Galaxy, 1.9 TD Diesel

Martin Mohr, Closing remarks: dilution ratio not stable weak sensitivity of DC for nucleation temperature effect seems not always consisting gasoline: strong effect of cold start temperature no effect for steady states diesel: almost no effect on temperature at all nucleation only for gasoline at cold starts and high speeds

Martin Mohr,

Conclusions (3/4)

Martin Mohr,