【正文】 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. 57 Emission control strategy towardsEU4/5 RBCD/EVL | 169。C ? boost pressure TDC ? throttling TDC ? throttling TDC ? throttling TDC Emission control strategy towardsEU4/5 54 后處理工況下 DPF前的排氣溫度 Regular Operation正常非再生工況 169。 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 Systems bmep [bar]024681 01 21 41 61 82 0N [ 1 / m i n ]1 0 0 0 1 5 0 0 2 0 0 0 2 5 0 0 3 0 0 0 3 5 0 0 4 0 0 03 0 03 0 04 0 04 0 05 0 06 0 0r p m [ 1 / m i n ]V 7 8 73 0 04 0 05 0 06 0 0no measures Target: Temperature upstream DPF = 620 +/ 20176。C High temp. needed = CC position 需要更高的溫度，和氧化催化器相連型系統(tǒng) DPF System layout:(顆粒捕捉器的結(jié)構(gòu) ) Emission control strategy towardsEU4/5 52 RBCD/EVL | 169。/升 Loading 填裝 Regeneration= PMOxidation 再生＝ 顆粒氧化 Emission control strategy towardsEU4/5 51 System 系統(tǒng) Characteristics 特性 Regeneration temperatures后處理溫度 Remarks 備注 cDPF 涂層顆粒捕捉器 with catalytic support 需要涂層催化劑的支持 ~ 600176。 Robert Bosch GmbH 2022. All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights. Diesel Systems Diesel Particulate Filter 柴油顆粒 捕捉器 Cordierite堇青石 outlet channel 出口 filtration wall 過濾墻 (? 95 %) Plugs 接頭 inlet channel Silicon Carbide 金剛砂 Particulate Matter (PM) high specific surface ~ 1m178。 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 Systems EU IV certification at least D at a S our c e: K r af t f ahr t B undes am t ( K B A ) 12/ 2022*) EU final proposal () NOx [g/km] Particulates [g/km] Diesel PC EU 4 (01/05) (09/09) EU 5* wall flow DPF Emission control strategy towardsEU4/5 48 | 169。 DPF POC DPF Emission control strategy towardsEU4/5 46 RBCD | 169。 Robert Bosch GmbH 2022. All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights. Diesel Systems DPF – filter mechanism ? Adjacent channels closed off at each end by ceramic plugs ? Exhaust gas is forded to perate through ceramic walls ? 1st: Deepbed filtration ? particles are transported into the pore walls by diffusion ? 2nd: Surface filtration ? highly efficient filtration by the layer formed by soot particulates ? 3rd: Regeneration ? burning off deposited soot to decrease the exhaustgas backpressure 45 RBCD/EVL | 169。 Robert Bosch GmbH 2022. All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights. Open System for Continuous Soot Oxidation(POC) Emission control strategy towardsEU4/5 ESC ETC Principle: Deposition of particles on porous fibre fleece Layout: corrugated foil with small blades Mechanism: 1) Soot Deposition 2) Soot Oxidation C + 2NO2 ? CO2 + 2NO 0 20 40 60 80 before PMKAT Conversion Conversion Rate, % 0 20 40 60 80 PM, mg/kWh after PMKAT Conversion Rate: Source: MTZ 6/2022 43 RBCD/EVL | 169。 Robert Bosch GmbH 2022. All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights. Diesel Systems The effect of DOC ? Effect on Total NOx Emissions ? No more than a few percent ? SOF Removal ? Considered same as HC Performance Conversion of CO and HC in Diesel Oxidation Catalyst Concentration of NO2 with Diesel Oxidation Catalyst After DOC Engineout 41 Emission control strategy towardsEU4/5 RBCD/EVL | 169。 Robert Bosch GmbH 2022. All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights. Diesel Systems Composition of Diesel Particulates Example: HD diesel engine, US FTP transient cycle, 1998 39 RBCD/EVL | 21/10/2022 | 169。 Robert Bosch GmbH 2022. All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights. Diesel Systems EGR with PM Cat. to CN4/5 TC EGR IC DOC + POC PM catalyst ? NOx reduced to CN4/5 by EGR ? EGR rate ~15% for CN4, open loop control ? EGR rate ~25% for CN5, close loop control ? PM reduced by PM catalyst (POC) ? Conversion rate ~50% ? Open system ? Requirement: ? EGR system ? POC and DOC ? Low sulfur fuel ? Advanced TC for CN5 ? Oil consumption 37 Emission control strategy towardsEU4/5 RBCD/EVL | 169。 Robert Bosch GmbH 2022. All rights reserved, also regarding any disposal, exploitation, reproduction, editing, distribution, as well as in the event of applications for industrial property rights. DS Temp Sensor US Temp Sensor SCR DOC STEP1: Thermal Hydrolysis CO(NH2)2 + H2O → 2NH3 + CO2 N2 N2 O2 CO2 NH3 STEP 2: SCR R