From MB Passion.
MORE DETAILS ON THE OM 654 M IN THE E 300 D 4MATIC FROM MERCEDES-BENZ
With the electrified OM 654 M, Mercedes-Benz is offering a new engine with a 48-volt electrical system in the E 300 d 4MATIC that has never been seen before. In particular, the starter generation with 15 kW / 20 PS pushes it hard and supports it with 200 Nm extra torque.
For the OM 654 M 4-cylinder diesel engine, the well-known OM 654 has not only been modified by increasing the displacement to 1,993 cm³ by increasing the stroke to 94 mm. The mild hybrid now also has a 48-volt electrical system - in addition to the conventional 12-volt electrical system, which is responsible, among other things, for operating the integrated starter generator and for the air conditioning.
Injection pressure of up to 2,700 bar
A 5th generation common rail direct injection with up to seven injections per work cycle works up to 2,700 bar. The two-stage turbocharger from the supplier BorgWarner has adjustable turbine blades - to regulate the air volume - and thus ensures a particularly fast build-up of torque even at low speeds.
According to the manufacturer BorgWarner, the R2S system of the turbocharger used here is even the first diesel application on the market that is equipped with a cast steel turbine housing for maximum heat resistance. The system uses a combination of a turbocharger for the high pressure stage and a wastegate turbocharger for the low stage. The development includes a water-cooled electrical actuator, bearing system and compressor housing.
The use of two SCR catalytic converters with respective AdBlue® injection and an additional NOx storage catalytic converter significantly reduces the emission of NOx gases. Multi-way exhaust gas recirculation: Even more exhaust gases are recycled in the combustion process.
The components of exhaust aftertreatment in the OM 654 M:
- a close-coupled NOX storage catalytic converter to reduce nitrogen oxides
- a DPF (diesel particulate filter with a special coating to also reduce the amount of nitrogen oxides)
- an SCR catalytic converter (Selective Catalytic Reduction; with a dosed amount of AdBlue ® injected ) and an additional SCR catalyst in the underbody of the vehicle with a separately dosed amount of AdBlue ® injected
First diesel with integrated starter generation of the 2nd generation
The integrated starter generator of the 2nd generation can control the combustion engine with 15 kW (20 HP) additional power and 200 Nm extra torque. It is placed in the power end of the 9G-TRONIC automatic transmission to save space and is therefore optimally integrated with regard to electrical connections and cooling. In addition, the weight of the system was reduced and its robustness increased. The 4-cylinder engine, in combination with an integrated starter generator (ISG) and the 48-volt on-board network (in addition to the 12-volt on-board network), provides four times the power with the same current levels. This means that auxiliary units with high power requirements, such as the refrigerant compressor, can be used. In overrun, a considerable proportion of the kinetic energy is fed back into the battery (recuperation). This can significantly reduce the consumption of the drive.
Details of the engine in the E 300 d 4MATIC (W213 sedan):
- 1,992 cm³, OM 654 M D 20 G SCR
- 82.0 mm bore, 84.3 mm stroke
- Rated output 195 kW / 265 hp at 4,200 rpm
- 550 Nm between 1,800 - 2,200 rpm
- Acceleration 6.3 seconds, V-Max 250 km/h
- Cut-off speed 5,000 rpm
- Oil change quantity 6.5 liters, SCR tank 23.5 liters, coolant 11 liters
- 15 kW electric motor, 200 Nm (ISG2d)
- Exterior noise 71.9 dB-A, while driving 67 dB-A
- Combined CO2 emissions: 148-143 g/km
- Combined consumption 5.6-5.4 l per 100 km
- All-wheel torque distribution: 45/55% v/h
- Axle load front axle / rear axle (empty weight EG): 1,065 kg / 1,335 kg
- permissible front axle load: 1,260 kg
- permissible axle load rear axle in trailer operation: 1,455 kg
- Maximum roof load: 100 kg, permissible vertical load: 84 kg
- Permissible trailer load unbraked / braked (12%): 750 or 2,100 kg
https:///2021/02/mehr-details-zum-om-654-m-im-e-300-d-4matic/
