LN10a - - Improved backflow hydraulics Nozzle:- Miniature...

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1 Internal Combustion Engines MIXTURE PREPERATION in CI ENGINES Prof.Dr. Cem Soru ş bay Common-Rail System (Truck engine)
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2 Common Rail System Common-Rail (Truck Rail Basic Design) RDS rail pressure sensor DBV pressure limiter valve
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3 Common-Rail System Tank Prefilter Other sensors High pressure pump CP3 Rail Gear pump Filter Rail pressure sensor Accelerator pedal Engine speed (crank) Engine speed (cam) Other actuators Control unit Pressure limiter valve High pressure Low pressure Injector Flow limiter Metering unit ZME Flow Limiter
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4 Common Rail Fuel Injector (Heavy Duty) Magnet Group: - Magnet core from solid Armature Group: - Single piece Armature Valve Group: - Reduced control volume - Improved piston geometry Injector body: - Optimized high pressure bore geometry
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Unformatted text preview: - Improved backflow hydraulics Nozzle:- Miniature sac hole or sac hole respectively- Nozzle guided pushrod - Single needle guidance- Flat shoulder Common Rail Fuel Injector 20 40 60 80 100 120 140 160 MPa 0.0 0.5 1.0 1.5 2.0 2.5 3.0 ms current solenoid lift of armature pressure in control chamber lift of nozzle needle injection rate on signal rail pressure 5 High Pressure Pump High Pressure Pump 6 CR System – Comparison of Injection Strategies PI MI Pol Pilot injection Main injection Post Injection Injector Crank angle 0° 180° Needle lift Cylinder pressure DI Engine – warm up after cold start at -20 O C...
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LN10a - - Improved backflow hydraulics Nozzle:- Miniature...

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