![]() At their introduction many of these systems could deliver up to six separate fuel pulses to provide more control over the combustion process, thus eliminating much of the traditional clatter associated with diesels. Unlike most engines that have the camshaft timing chain at the “front” of the engine opposite the transmission, this one is between the engine and transmission so most of the drive mechanism is contained in the bell-housing.ĭiesel engines made a huge step forward in noise reduction in the mid-2000s with the introduction of high-pressure common rail fuel injection. ![]() The engine has a new aluminum cylinder block and bedplate with a structure designed to minimize noise transmission. ![]() In addition to tighter emissions and fuel economy regulations, GM put a major emphasis on refinement in order to earn that “whisper diesel” nickname. In addition, all new diesels launched since September 2015 have been subjected to road testing of emissions in addition to the traditional lab tests prior to certification. According to Nicholson, “the 1.6 was designed from the ground up to meet the next-generation Tier 3 Bin 125 emissions regulations” that tighten particulate and NOx emissions even further. While the 1.6-liter was designed and launched in Europe months before the VW news hit, GM hasn’t really been implicated in cheating accusations to date. The obvious concern is that the blowback from the VW scandal might mar the overall appeal of diesel but Nicholson seemed uncorned. 2017 Chevrolet Cruze diesel sedan Sam Abuelsamid
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