Allows the precise control of charge stratification vital to ignite ultra-lean air / fuel mixtures.

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4 Allows the precise control of charge stratification vital to ignite ultra-lean air / fuel mixtures. Eliminates pumping loss associated with drawing air around a conventional engine's butterfly valve. 4

5 2875 Measurements for Calibration. Lambda Closed-Loop Control. TWC and Rich/Lean Cycle. 12,000,000 Measurements. (Engine Mapping) 40% More Computer Functions. High Pressure Pump, Injectors, Valves, and Fuel Rail. High Pressure & Exhaust Temperature Sensors NOx Storage Catalyst 5

6 25% Improvement in Fuel Economy 12-15% Reduction in Emissions Higher Compression High Cost More Components NOx Storage Catalyst Required. Complex Strategies. Possibly Six Operating Modes. 6

7 Gas Injected Just Before Ignition. Less Time for Knock. Colder Fuel at Ignition. Tighter Controls. Higher Compression Ratios and Boost Pressures. Better MPG and Higher HP. 7

8 psi. (high side) 50-90V Capacitor Kick As little as Idle psi. 8

9 Fuel/Air Mixture is Rich around Spark Plug Only, Remaining Mixture in Cylinder is Lean. Retarded Ignition Timing, Increases Exhaust Temp, Faster Catalyst Warm-up. Air and Fuel are Equally Mixed in Cylinder. 9

10 Courtesy of Robert Bosch LLC. 10

11 Courtesy of Robert Bosch LLC. 11

12 Courtesy of Robert Bosch LLC. 12

13 Courtesy of Robert Bosch LLC. 13

14 Courtesy of Robert Bosch LLC. 14

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17 Courtesy of Robert Bosch LLC. 17

18 64 V capacitor discharge for initial injector opening..9ms (907μs) 2007 Volkswagen GTI 2L. Turbo 52 V Spike 18

19 2006 VW Passat 2.0T Courtesy of Robert Bosch LLC.

20 2006 VW Passat 2.0T 20

21 Courtesy of Robert Bosch LLC. 21

22 Courtesy of Robert Bosch LLC. 22

23 Source: Robert Bosch GmbH Canister Carbon canister close valve Boost pressure temp. sensor Electronic control unit 2) CAN Diagnosis lamp Diagnosis interface Immobilizer Non return valve Canister purge valve Throttle device (ETC) Intercooler Accelerator pedal modul Manifold pressure sensor Fuel pump module High pressure pump Fuel rail Injector Pressure sensor 2x Knock sensor Camshaft phaser 1) ETC = Electronic Throttle Control 1) intake and exhaust camshaft 2) ECU with integrated ambient pressure sensor Speed sensor Solenoid valve Ignition coil/ spark plug Temp. sensor Phase 1) sensor Dump valve Bosch components specifically for DI Waste Gate actuator Waste Gate Catalyst Oxygen sensor Air mass meter Turbo charger Solenoid valve Oxygen sensor Courtesy of Robert Bosch LLC.

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25 . Courtesy of Delphi Corp. 25

26 Courtesy of Ford Motor Co. 26

27 Courtesy of Robert Bosch LLC. 27

28 High pressure pump is driven off the camshaft (2150 psi, 140 bar) Fuel pressure regulator valve Rail-mounted fuel pressure sensor Integral pressure relief valve incorporated in HDP5 HP Pump Courtesy of Robert Bosch LLC.

29 Exhaust Camshaft (Bank 2) Mechanical One (1) Cylinder HIGH- Pressure Fuel Pump and Fuel Pressure Regulator Solenoid (FPR) w/integral Pressure Relief Valve Pressure Tap Fuel Pressure Sensor Courtesy of General Motors Corp 29

30 1 of 6 GM engines will be SIDI Features: 1. Polymer-coated piston skirts to-1 compression ratio. 3. Closed-coupled catalytic converters. 4. Fuel Pressure = Idle 35bar (508psi) to120bar (1740 psi) 1.5 Ohms Courtesy of Robert Bosch LLC. 30

31 Spring pressure opened ECM provides PWM B+ (high side driver) and ground. Camshaft and crankshaft position sensor inputs synchronize the FRP regulator with the position of the eccentric on the camshaft. Fuel Pressure Regulation FPR is held open for a portion of each piston stroke displacing fuel back into low pressure side. GM Service Manual is telling that story. 31

32 damper Function Limp home valve Integral Pressure Relief Valve HP-Sensor tank PRV P Filter Rail Filter Fuel pump PV HDP HDEVs CS Tank Motronic Courtesy of Robert Bosch LLC.

33 Pressure damper Limp home valve Outlet Outlet Valve Piston Control Valve Inlet Valve Seal Courtesy of Robert Bosch LLC. 33

34 Port Injectors Direct Injectors 34

35 :, Operating Modes Few degrees before TDC Both 35

36 Area around spark plug is richer then rest of cylinder. Fuel and Air are mixed through out cylinder. 36

37 : Fuel Injected into Intake Port. : Homogeneous Mix Enters Cylinder. Prior to TDC : Fuel Injected into Cylinder Just : Fuel is Directed by Piston Contour Around Spark Plug. Rich Mix Easily Ignites to Burn Lean Mix in Rest of Cylinder. 37

38 Fuel Injected in Intake Port. Homogeneous Mix Enters Plus Fuel is Directly Injected as Homogeneous Mix Enter Cylinder for Mix Correction. Utilizes Heat Evaporation of Cooler Fuel = Higher Efficiency /Power. Mixture is Compressed. 38

39 High Pressure Fuel Pump and Electronic Pressure Regulator 3.5 to 4.5 MPa (508 to 653 psi) 39

40 Electric In-Tank Transfer Pump Mechanical High Pressure Pump Wiring to Electronic Driver Unit (EDU) Computer Controls Spill Valve Open Duration. Longer open Time = More gas Pushed Back into Intake Line = Less Pressure 40

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42 196 to 588 kpa (28 to 85 psi) 42

43 Smart Idle Stop System (SISS) Restart in 0.35 seconds (1/2 time of electric motor) 10% fuel savings. No Electric Motor. Uses Direct Injection + Spark 43

44 Courtesy of Green Car Congress Courtesy of Automotive Engineering 44

45 Late combustion fuel injection for catalytic warm-up Exhaust gas temperature 700 C (1300 F). Started few seconds after Two-Stage. Immediate CO oxidation reaction. Prevents CO poisoning. 45

46 Shared with Ford Escape, Focus, and Ranger. Shaped Intake Ports Low Restrictions Wall Guided Swirl 46

47 WAIT at LEAST 2 hours after the engine has been run, before removing the high pressure fuel line. 47

48 1. Homogeneous 2. Homogeneous Lean 3. Stratified 4. Homogeneous Stratified 5. Homogeneous Knock Protection 6. Stratified Catalysts Heating 48

49 PFI 6 Operating Modes Courtesy of Robert Bosch LLC. 49

50 Courtesy of Robert Bosch LLC. 50

51 Courtesy of Robert Bosch LLC. 51

52 Courtesy of Robert Bosch LLC. 52

53 Courtesy of Robert Bosch LLC. 53

54 Courtesy of Robert Bosch LLC. 54

55 Courtesy of Robert Bosch LLC. 55

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