esel-Basic

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Bosch Training CentreDiesel Engine

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Division : MICO/PDT(BTC)This is the exclusive property of Motor Industries Co. Ltd. Without their consen

t, it may not be reproduced or given to third parties.

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Bosch Training CentrePrinciple of the reciprocating engine

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Bosch Training Centre4 stroke cycle diesel engine

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Bosch Training CentreFuel layout on a diesel engine(o/f valve on FIP)

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Bosch Training CentreSectional view of the injection pump PE .. A

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Common Rail SystemGear Pump / Feed Pump

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Bosch Training CentreFuel Layout - With VE Pump

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Bosch Training CentreVE Pump - Features

The basic VE Pump contains the following functional groups: Vane type supply pump Distributor Head (High Pressure Pump) Mechanical Governor Hydraulic Timer Electric Shut off Device

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Division : MICO/PDT(BTC)This is the exclusive property of Motor Industries Co. Ltd. Without their consent, it may not be reproduced or given to third parties.

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Bosch Training CentreDistributor Pumps - VE Mechanical (sleeve controlled)

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Bosch Training CentreRole of Electronics in FIE

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Bosch Training CentreEDC System blocks

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Bosch Training CentreVE EDC Pump Structure

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Bosch Training CentreCommon Rail System

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Bosch Training CentreDemands & Basic parametersEmission Legislation Higher Power and Torque

Fuel EfficientSmoother drivability Cost effective Injection Quantity Injection Begin InjectionPressure

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Degrees of Freedom in Common Rail : Injection Pressure Injection Quantity Injection Begin

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What is Common Rail?Common Rail is a

Modular, Electronic Controlled, Diesel Fuel Injection System.

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Special Characteristics : Injection Pressure is produced and governed relatively independent of the EngineSpeed and can be selected freely within a wide range. Injection begin and Injection Quantity can be freely selected (EDC function)

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How are the main characteristics of CR system achieved ? CR uses an intermediate High Pressure Accumulator (Rail) Uses Electronic Controlof Injectors (use of Electro-magnetic valves)

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Bosch Training CentreCommon Rail SystemInjection pressure [bar] 1800 1600 1400 1200 1000 800 600 400 200 other port-controlled systems Common Rail

Common Rail Other port controlled Systems (Conventional)

1000

2000

3000

4000 5000 Engine speed [RPM]

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Bosch Training CentreCommon Rail SystemDriver demand

CP3

MPROP

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Bosch Training CentreCommon Rail System Layout

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Bosch Training CentreCommon Rail SystemHigh Pressure Pump CP1 - Standard

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Division : MICO/PDT(BTC)

This is the exclusive property of Motor Industries Co. Ltd. Without their consent, it may not be reproduced or given to third parties.

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Common Rail SystemCP3 - High Pressure Pump

Controller (MPROP) - Control at the Pump inlet Feed Pump (Gear Pump)

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Common Rail SystemMPROP - Magnetic Proportional ValveMaximum delivery Q [l/h] Zero delivery

I [A]

Detail A

Fuel

Zero delivery

AFuel

Maximum delivery

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Bosch Training CentreCommon Rail SystemDRV Pressure Regulator Valve

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Bosch Training CentreCommon Rail SystemDRV Pressure Regulator ValveF Magnet F Magnet F High pressure F Spring

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Bosch Training CentreCommon Rail SystemHigh Pressure Rail

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Bosch Training CentreCommon Rail SystemHigh Pressure Rail Factors determining the Rail Volume :

Rail Volume is a compromise based on the following two factorsVolume to be kept as small as possible to keep the response time of the system short (i.e., the setpoint pressures to be achieved in as short a time as possible

) Volume should be as large as possible to keep the Pressure oscillation to minimum possible value.

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Bosch Training CentrePressure Limiter Valve

From Rail High Pressure Fuel

Return to Tank Low Pressure Fuel

2000 1500 1000 500 00 4

pressure [bar]

time

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Bosch Training CentreInjector

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Bosch Training CentreInjector

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Bosch Training CentreInjector Principle

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Bosch Training CentreInjector 2/2 ValveClosed p2 0 p1 Outlet Orifice p st p1 Inlet Orifice Control volume Vst p1 p1 p st p 2 Open p2 0

U I

FV

Valve Lift

F0

F0

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Bosch Training Centre Common Rail SystemInjector

Current

Armature Lift

Nozzle end Pressure

Control Chamber Pressure

Needle Lift

Injection Rate

Time

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Bosch Training CentreInjector Characteristics100

90

Full Load Area

1600bar1500bar

80

Quantity (mm3/str.)

70

Emission area60

950bar

50

600bar

40

Pilot Injection Area30

Low Idle Area

300bar 250bar

20

10

0 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5

Energizing Time (ms)1Division : MICO/PDT(BTC)This is the exclusive property of Motor Industries Co. Ltd. Without their consent, it may not be reproduced or given to third parties.

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Bosch Training CentreElectronic Control UnitInput circuits (1) sign. process. unit sign. process. unit Output circuits (2) steady correcting varaibles digital correcting and output signals Interfaces (5):communication diagnosis

analog signals

A Signal D processing (3)

D A

digital signals

Power supply (6) 12/24V

Memory (4)

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Bosch Training CentreCommon Rail SystemFilter assembly

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Bosch Training CentreCommon Rail SystemElectric Fuel Pump

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esel-Basic

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