The OM 470 in detail: light and powerful
The new OM 470 engine is based on the OM 471 heavy-duty model range, but with some distinctive touches reflecting its intended areas of use. In particular, its weight of just 990 kg (DIN 70020-A) makes the new OM 470 ideally suited for buses, where every kilogram counts.
A key feature of the new OM 470 (vertically mounted only) is
X-PULSE, the unique flexible common rail system developed by Mercedes-Benz, with all-electronic control and hydraulic pressure booster. In comparison with the pressure of a maximum of 900 bar developed in the common rail, the injection pressure in individual injectors is boosted to up to 2100 bar. The injection process can be modelled as required according to the operating environment.
In all versions of the OM 470, supercharging is carried out with an exhaust turbocharger with an asymmetric turbine casing and rigid geometry. Specifically for fitting in buses, the engine also has a very flat oil pan to save space. The new OM 470 is designed for use in articulated buses operated in areas with challenging topographical features and in large-capacity buses. It is available for the Citaro in two power and torque levels:
Power | Torque |
265 kW (360 hp) at 1800 rpm | 1700 Nm at 1100 rpm |
290 kW (394 hp) at 1800 rpm | 1900 Nm at 1100 rpm |
Mercedes-Benz OM 470