奔驰将扩大旗舰级的S级车型所搭载的引擎阵容，2017款S级将增加三种引擎——直列六缸柴油和汽油引擎以及V8双涡轮汽油引擎。这些新引擎将采用“突破性”技术，包括一体式起动发电机，48伏电子系统和电动辅助增压器。首先，新的V8引擎将替代目前的S500搭载的V8引擎，它将成为“目前世界上最经济的V8汽油引擎之一”。这台内部编号为M176的新引擎采用了停缸技术，可以将其中的四个气缸关闭，从而使其比老款引擎油耗降低10%。此外，工程师还在气缸组之间安装了涡轮增压器。奔驰表示，这台4.0升新引擎功率为350千瓦/476马力，扭矩700牛米。而S500改款车从明年开始标配汽油颗粒过滤器。而另一台直列六缸汽油引擎内部编号为M256，它采用创新性的48伏电子系统，电动辅助涡轮增压器以及一体式起动发电机。后者可提供混动功能，包括提升制动能量回收效率，同时可有效降低油耗。奔驰并未透露该引擎功率数据，只是表示这台新的3.0升直列六缸引擎功率将超过300千瓦/408马力，扭矩超过500牛米。与将被其替代的V6引擎相比，新引擎二氧化碳排放量降低15%。奔驰表示，该引擎性能表现达到八缸引擎水平，而油耗仅为四缸引擎水平，运行平顺性达到六缸水平。而另一台直列六缸柴油引擎是“奔驰时尚动力最强劲乘用车柴油引擎”。其功率为230千瓦/313马力，比老款引擎提升了41千瓦/55马力。尽管功率增加，但油耗降低7%。这三台引擎明年将搭载在新款S级车型上。
2017 Mercedes S-Class gets new biturbo V8 and inline-six engines
Mercedes-Benz is expanding the engine portfolio for its flagship S-Class limousine with the addition of three new engines – inline-six diesel and petrol units, and a biturbo V8 petrol. These new motors bring “ground-braking” technologies, such as an integrated starter-alternator (ISG), a 48-volt electrical system, and an electric auxiliary compressor (eZV).
Starting with the V8, it replaces the existing V8 of the S500 and is “one of the most economical V8 petrol engines in the world,” according to the manufacturer. Codenamed M176, it features a cylinder deactivation system which can turn off up to four of the cylinders and helps improving the fuel efficiency by 10 percent compared to the engine’s predecessor. In addition, the engineers have mounted the turbochargers in between the cylinder banks.
The German company says the new biturbo V8 produces 476 horsepower (350 kilowatts) and 516 pound-feet (700 Newton meters) of torque from a 4.0-liter displacement. Interestingly, the revised S500 will get a petrol particulate filter as standard from next year.
Next is a six-cylinder inline petrol engine codenamed M256, which uses an innovative 48-volt electric system and a turbocharger with electric auxiliary compressor, as well as an integrated starter-alternator. The automaker explains the ISG provides hybrid functions, such as boost or energy recovery, while allowing fuel savings that were previously reserved for high-voltage hybrid technology.
Mercedes is still not providing exact power figures for the unit, but says the new 3.0-liter inline-six motor delivers over 408 hp (300 kW) and more than 369 lb-ft (500 Nm) of torque. Compared to the V6 it replaces, the new engine emits around 15 percent less CO2. The creators of the engine claim it combines “the same performance as an eight-cylinder machine” with the efficiency of a four-cylinder engine and the refinement of a six-cylinder.
The latest new addition to the S-Class range is the “most powerful passenger-car diesel engine in the history of Mercedes-Benz” – an inline-six diesel with 313 hp (230 kW), up by 55 hp (41 kW) compared to its predecessor. Despite the increased power, it burns seven percent less fuel.
The three new engines will be available for the S-Class limousine starting from next year.