Advanced Diesel Common Rail Injection System for Future Emission Legislation © Robert Bosch GmbH reserves all rights even in the event of industrial property rights We reserve all rights of disposal s[.]
10th Diesel Emission Reduction Conference Advanced Diesel Common Rail Injection System for Future Emission Legislation Roger Busch Common Rail System Engineering for PC Diesel Systems Robert Bosch GmbH © Robert Bosch GmbH reserves all rights even in the event of industrial property rights We reserve all rights of disposal such as copying and passing on to third parties Outlook • Drivers and Challenges for PC and LDT - Diesel • Overall System Requirements for Advanced Common Rail • BOSCH 4th Gen Common Rail Injection Systems • Potential Evaluation of 4th Gen Common Rail Systems © Robert Bosch GmbH reserves all rights even in the event of industrial property rights We reserve all rights of disposal such as copying and passing on to third parties Diesel System Innovations Diesel Progress - PC © Robert Bosch GmbH reserves all rights even in the event of industrial property rights We reserve all rights of disposal such as copying and passing on to third parties Diesel System Innovations 2003 149 Nm/l 51 Nm/l 48,4 kW/l 9,5 l/100km Consumption [l/100 km] spec Torque [Nm/l] 1936 33 kW 6,5 l/100km 130 kW 13,0 kW/l spec Power [kW/l] eff Power [kW] © Robert Bosch GmbH reserves all rights even in the event of industrial property rights We reserve all rights of disposal such as copying and passing on to third parties Approval Data for PC - Diesel at least Euro source: KBA Germany © Robert Bosch GmbH reserves all rights even in the event of industrial property rights We reserve all rights of disposal such as copying and passing on to third parties Diesel System Innovations © Robert Bosch GmbH reserves all rights even in the event of industrial property rights We reserve all rights of disposal such as copying and passing on to third parties DEER 2004 4th Gen Diesel Common Rail Injection System Outlook • Drivers and Challenges for PC and Truck - Diesel • Overall System Requirements for Advanced Common Rail • BOSCH 4th Gen Common Rail Injection Systems • Potential Evaluation of 4th Gen Common Rail Systems © Robert Bosch GmbH reserves all rights even in the event of industrial property rights We reserve all rights of disposal such as copying and passing on to third parties PC Common Rail System 4th Generation FIE Requirements Evaluation max injection pressure Pressure at the needle Sensitivity analysis of important injection parameters for the engine performance Needle lift 2b 2a 6a 6b Time Feature: Pilot injection (number, time gap, quantity, tolerance) Opening pressure, influence of pressure ramp, gradient Max injection pressure, influence of small nozzle holes Pressure gradient during closing Post injection (near, late, influence of pressure level) Opening and closing speed of the needle © Robert Bosch GmbH reserves all rights even in the event of industrial property rights We reserve all rights of disposal such as copying and passing on to third parties FIE Requirement Evaluation - Summary NOX [g/kg] Particles / NOx = 1/10 Potential Analysis for PC an LDCombustion Process and FIE Euro3 Euro4 A z F E D C B G I H L K series applications cept cept cept cept cept cept ept cept cept cept cept ept c c n on on on on on on Co on on on on on C z n = 2000/min, BMEP = 6,5 bar C C C C C C C fast needle opening velocity but: injection rate during ignition delay injection rate after start of combustion C C C „vario“ nozzle Ỵ rate shaping Î © Robert Bosch GmbH reserves all rights even in the event of industrial property rights We reserve all rights of disposal such as copying and passing on to third parties M Euro4/ 1400 kg inertia weight 4th Gen5"Diesel Common Rail Injection System "Euro - Einspritzsystem “Optimal” Shape for PC Engines © Robert Bosch GmbH reserves all rights even in the event of industrial property rights We reserve all rights of disposal such as copying and passing on to third parties 10 PC Common Rail System 4th Generation Piezo-Injector with Coaxial-Vario-Nozzle CRI4-PV Injector -Charakteristics z Basis: CRI3 z Systempressure 1600/1800 bar z Space requirement as CRI3 z One row for part load z Both rows for full load © Robert Bosch GmbH reserves all rights even in the event of industrial property rights We reserve all rights of disposal such as copying and passing on to third parties 14 4th Generation Common Rail System for PC Vario Nozzle Strategies Combustion Noise [dB(A)] NOx [g/kg]* 12 10 with PI w/o PI n=2000rpm, BMEP=6,5bar 101 w/o PI Avoidance of PI (except for cold engine and idle) Emission reduction Reduction of QHYD 98 Noise reduction 95 92 Indepentantly switchable 2nd row 89 with PI 86 83 200 of spray holes 400 600 800 1000 1200 1400 hydraulic flow / cyl displacement [cm³/30s@100bar/dm³] Current Configuration Potential Vario Nozzle appropriate power output © Robert Bosch GmbH reserves all rights even in the event of industrial property rights We reserve all rights of disposal such as copying and passing on to third parties 15 DEER 2004 4th Gen Diesel Common Rail Injection System Advanced Common Rail Systems for PC CRS - Hydraulically Amplified Diesel Injection System • Functions Ö Rail Pressure up to 1350 bar Ö HAD - Injector with hydraulic pressure amplification Ö sophisticated closed loop fuel metering control Ö innovative, delivery controlled high pressure pump platform • Advantages Ö small Qhyd and passive rate shaping to pull down raw emissions and noise @ part load Ö max pressure > 2200 bar @ spray hole to reach high power and reduce raw emissions @ full load (US 06, e.g LD in EU) © Robert Bosch GmbH reserves all rights even in the event of industrial property rights We reserve all rights of disposal such as copying and passing on to third parties 16 PC Common Rail System 4th Generation Hydraulically Amplified Diesel Injector (HADI) Injector-Characteristics z System pressure up to 1.350bar z Pressure amplification ≈1:2 z Pressure at the nozzle up to 2.200bar z Pressure/lift controlled needle z Ramp rate shape z Space requirements as CRI2 z Conventional nozzle © Robert Bosch GmbH reserves all rights even in the event of industrial property rights We reserve all rights of disposal such as copying and passing on to third parties 17 CRS - Roadmap Pkw und Light Duty < 6t © Robert Bosch GmbH reserves all rights even in the event of industrial property rights We reserve all rights of disposal such as copying and passing on to third parties 18 Advanced Control Functions © Robert Bosch GmbH reserves all rights even in the event of industrial property rights We reserve all rights of disposal such as copying and passing on to third parties 19 Advanced Control Functions © Robert Bosch GmbH reserves all rights even in the event of industrial property rights We reserve all rights of disposal such as copying and passing on to third parties 20