ME-SFI vehicle features - AH07.61-P-0002-02MB

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Comparison of engine 285.950 with engine 285.980

Engine 285.950	Engine 285.980
Fuel injection and ignition system ME 2.7.1 Fuel injection and ignition system ME 2.7.2 from 1.9.06	Fuel injection and ignition system ME 2.7.1 Fuel injection and ignition system ME 2.7.2 from 1.9.06
Displacement 5513 cm³ Rated output 368 kilowatt (550 HP), rated torque 900 Nm	Displacement increased to 5980 cm³ (stroke +6 mm, hole +0.6 mm) Rated output 450 kilowatt (612 HP), rated torque 1000 Nm Forged piston, connecting rod, crankshaft and connecting rod bearing out of other optimized materials.
In each cylinder bank a turbocharger (Biturbo) made out of steel casting.	In each cylinder bank a turbocharger (Biturbo) made out of steel casting. Geometry and temperature strength adapted to the increased gas flow.
The maximum boost pressure is approx. 1.3 bar at sea level.	The maximum boost pressure is approx. 1.5 bar at sea level.
ME 2.7.1: Fuel filter with integrated overflow valve approx. 3.5 bar and with installed throttle (approx. 50 liters/hr).	ME 2.7.1: Fuel filter with an integrated overflow valve approx. 3.5 bar without throttle (mounted in the fuel tank)
ME 2.7.1: Fuel pump with a maximum delivery rate of approx. 245 liters/hr. ME 2.7.2: Stronger fuel pump (about 20 mm longer) with a maximum delivery rate of about 330 liter/h.	Fuel pump with a maximum delivery rate of approx. 330 liters/hour.
Fuel tank out of sheet steel	Fuel tank in sheet steel with integrated fuel pressure valve approx. 4.1 bar and throttle approx. 50 liters/hour. ME 2.7.2: Altered fuel tank with pressure relief valve about 5.2 bar
ME 2.7.2: Fuel pump control unit is a CAN subscriber, fuel pressure specification from the ME-SFI [ME] control unit to fuel pump control unit, signal from fuel pressure sensor read in at fuel pump control unit, system pressure constant at about 3.8 bar, at the start with a warm engine increased to about 5 to 5.5 bar	ME 2.7.2: In order to control the duel pumps the ME-SFI [ME] control unit detects the current fuel pressure via the fuel pressure sensor and sends a PWM signal (pulse width modulated signal) signal representing the current fuel requirements to the fuel pump control unit. This analyzes the PWM signal and actuates appropriately according to the fuel pump; system pressure regulated at 4 to 5.5 bar
ME 2.7.2: Camshaft Hall sensor, left cylinder bank omitted	ME 2.7.2: Camshaft Hall sensor, left cylinder bank omitted
Low temperature cooler mounted behind the radiator engine cooling.	Large low temperature cooler with increased cooling power, mounted in front of the radiator engine cooling.