Daimler introduces 4-cylinder, 48 V gasoline engine with a GPF
26 October 2017
Daimler is introducing a new 4-cylinder gasoline engine, designed to deliver the performance of a high-capacity 6-cylinder engine but with significantly reduced fuel consumption. The engine—which features a specific output in excess of 100 kW, a 48 V electrical system and a gasoline particulate filter (GPF)—will celebrate its world premiere in the Mercedes-Benz E-Class Coupé and Cabriolet models.
The new M 264 4-cylinder engine generates 220 kW/299 hp and maximum torque of 400 Nm from a displacement of 1991 cm3. In the E 350 Coupé, it achieves combined fuel consumption of 6.7 L/100 km with combined CO2 emissions of 149 g/km; in the E 350 Cabriolet, its fuel consumption is 6.8 L/100 km with combined CO2 emissions of 154 g/km. The engine is matched with a 9-speed 9G-TRONIC automatic transmission.
The engine’s special features include twin-scroll turbocharging with an electric wastegate actuator, belt-driven 48 V starter-alternator (EQ Boost) and electric 48 V water pump. In conjunction with the on-board 48 V technology, the starter-alternator enables a number of hybrid functions, such as:
- easy start, in which the engine starts and accelerates almost imperceptibly,
- boost—this function can support the combustion engine in the engine speed range up to 2500 rpm with additional output of up to 10 kW and 150 Nm of torque from the electric motor,
- recuperation of up to 12 kW when braking,
- operation within favorable engine characteristics,
- gliding with automatic engine switch-off when the driving conditions permit this.
Daimler pioneered the use of gasoline particulate filters in 2014, when a GPF was launched on the Mercedes S500. Daimler and other European carmakers are expected to introduce GPF technology on more vehicle models to meet the PN emission limit of 6.0×1011 km-1 (Euro 6c) and the PN RDE testing requirements (Euro 6d-TEMP) which became effective in September 2017.
Source: Daimler