Cummins Light Truck Clean Diesel Engine. September 2004
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1 Cummins Light Truck Clean Diesel Engine September 2004
2 Technical Program Overview Partnership, Cummins and U.S. Department of Energy Focus Development of technologies that will result in a product in the near term Emissions ~ U.S. Tier lb GVW ~ NO x = 0.07 g/mi; PM = 0.01 g/mi Fuel economy - 50 percent MPG improvement over 1997 gasoline powered vehicle it replaces Acknowledgment Partnership funding from DOE Vehicle and installation design assistance from Dodge Truck Engineering Engine Development Team at Cummins 2
3 US Passenger-Car & Light-Truck Market Cars Light Trucks % '00 '01 '02 '03 '04/7 % of Vehicles Sold Source - Automotive News
4 V Family Goals and Status Emissions Description Target V6 V8 V6 V8 EPA Tier 2 & CA LEV II Actual (Status) Tier 2 Bin 10 Interim Demonstrated, Tier 2 Bin 5 Final, Met in Vehicle Noise, dba 69 Hood Open, Equal to Gas 72.7 db, Bare Engine in Test Cell 65.0 Interior, 65 mph, 1500 Pickup Fuel Economy, MPG Quality/Reliability Rated Speed 50 % Better than Gas Equal to Gas, <2 RPH First Year and <10 RPH Five Years 22.1 Combined, Durango (+60%) Focus in Phase rpm (5000 max.) 4000 rpm (5000 max.) 21.7 Combined, BR1500 (+60%) Useful Life km(mi) B10 > 325,000 (200,000) Focus in Phase 3 Performance 9.6 sec, 0-60 mph, 5940 lb PTW 8.8 sec, 0-60 mph, 6200 lb PTW Displacement, Liter Power, rpm Torque Peak, Nm(ft-lb) Warm Up Serviceability Gasoline-Like (9-10 sec 0-60 mph) (335), 569(420) max (440), 760(560) max. 75 C(167 F) Coolant in C(-22 F) Equal to Gasoline 3600 WG 3800 VNT , Interim Target Met 569 (420) 623 (460) 49C in C Focus in Phase 3 No Adjustments, Diesel Fuel Flter Added 7.1 sec (1.2 sec Cold Start < C (-22F) Focus in Phase 3 -30C Weight, kg(lb) 295 (650) 340 (750) 301 (663) 357 (788) Meets Goal Partially Meets Goal; Plan in Place 4
5 Phase 3 Engine with Integrated Air Cleaner 5
6 Light Truck Diesel Subsystem Description Subsystem Description Configuration 90 V Displacement 4.2 L V6 5.6 L V8 Bore and Stroke 94 X 100 mm Valvetrain and Drive Single overhead cam, chain-driven Valve System Four valves per cylinder with hydraulic lash adjustment Fuel System High-pressure common rail (HPCR) Control System Full electronic Emissions Control Modulated-cooled EGR plus 4-Way Catalyst (Tier 2, Bin 5) Aspiration Intercooling Block Head NVH Control Accessories Accessory Drive Variable-Nozzle or Wastegated turbocharged Vehicle mounted air-to-air Cast iron, thin-walled High temperature alloy aluminum Ladderframe Common automotive V-8 gasoline Single serpentine belt, self-adjusted 6
7 Prime-Path-System with 4-Way Catalyst System Delta Pressure Sensor O2 Sensor Close-Coupled: Oxidation Catalyst O2, Temperature Sensors MY 07+, Tier 2 EPA & LEV II CA Underfloor: PM Filter N0x Adsorber HC & CO 7
8 Catalyst Aging Cycle Description 1 cycle 700 C 10 min Average Fuel Sulphur Level = 9.5 ppm, 20 mpg Average Oil Sulphur Level = 4000 ppm, 25K miles/qt 3.6 ltr NOx adsorber Sulphur Tolerance of 1 gm-s/ltr catalyst Temp 600 C 5 min One DeSOx cycle per ~2200 miles (~110 gallon fuel consumed) ~ 68 DeSOx cycles prior to 150K emissions check Lambda Time 8
9 Chassis Test Results - Bag Results V lb hp@50 mph Test CO [g/mi] CO2 [g/mi] NOx [g/mi] NMHC [g/mi] FE [mpg] PM [g/mi] FTP-75 FUL limits FTP-75 FTP bag bag bag Start 1600 mi Aged & Alt. ~150,000 mi 5400 ft 9
10 V6 Emissions Progression NOx (g/mi) Catalyst Steady State Engine Out Vehicle Engine Out Catalyst Vehicle Tailpipe 5000 lb ETW 0.9 g/mi EOE NOx 5500 lb ETW 0.9 g/mi EOE NOx Catalyst 5000 lb ETW VNT, 0.6 g/mi EOE NOx Aged catalyst 0 Sep-02 Dec-02 Mar-03 Jun-03 Oct-03 Jan-04 Apr-04 Aug-04 Nov-04 10
11 Combustion Parameter Development Gen 3 Piezo Fueling Variable-Nozzle Turbo Equivalence Ratio fuel / air mixing line Ignition Zone Soot Production Zone Advanced Combustion Precise Air Handling Temperature (K) NOx Production Zone Fresh Air Flow y = x R 2 = FAF Control with Fast VG Valve FAF Cmd Fresh_Air_Flow _Sensor Linear (Fresh_Air_Flow _Sensor) 11
12 Acceleration Test Results Gas = rpm Diesel = rpm Time, sec ½- ton ft 0-60 mph mph 5.7 l 6000 lb 5.6 l 6000 lb 5.6 l Diesel 6200 lb 12
13 Fuel Economy Results Durango 4.7 l Vs 4.2 l V6 Ram l Vs 5.6 l V8 MPG % ½- ton % 10 5 Gas Diesel 0 City Hwy Comb City Hwy Comb Test Condition 13
14 Noise Test Results V8 in Ram Sound Pressure Level, dba ½- ton Wendy's, Idle Interior, Idle Interior, 60 mph Open Hood, 3 ft at 45 deg 14
15 Comparison Phase 2 V6 vs Phase 3 V8 15
16 Base Engine Durability & Stability Cost Focused Areas * Based on high-volume European diesel usage 16
17 Conclusions Light Truck Diesel Family continues to show promise Customer features: Performance, comparable to Top Rated gasoline Fuel economy, advantage 44-49% (improves CAFE) Noise, approaching gasoline Smoke and odor, eliminated Cost approached on a fundamental basis Lower Engine-Out Emissions High-Volume Gasoline Supply Base Final Tier 2 emissions, met in a complete vehicle system There is a path to market for the Light Truck Diesel 17
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