Ever heard of a three-cylinder petrol engine which noise, vibration and harshness (NVH) characteristics is at par or even better than a four-cylinder powerplant? Here comes Opel/Vauxhall’s SGE (small gasoline engine), a 1.0-liter spark ignition direct injection (SIDI) turbo petrol that the carmaker intends to unveil next month at the Frankfurt International Motor Show.
The new SGE, which will power Vauxhall’s Adam city car starting next year, provides up to 115PS of output, with a low-end torque of 166Nm accessible from 1,800 to 4,700rpm. The SGE provides more torque throughout its operating range than equally powerful, higher displacement engines. It is also 20 percent more fuel efficient than current 1.6-liter naturally aspirated engine that powers the Astra.
The SGE will be paired with all-new six-speed gearbox when it is installed in the Adam. The 12-valve, 1.0-liter turbo SGE is the first in a new modular family of three and four-cylinder Vauxhall petrol engines, up to 1.6-liters.
It achieves significant fuel efficiency thanks to a horde of state-of-the-art technologies like direct injection, continuously variable valve timing, and a lightweight aluminum cylinder-block. Vauxhall expects the new engine family to returns less than 100g/km of carbon dioxide emissions.
Matthias Alt, Chief Engineer at Small Gasoline Engines unit of Vauxhall, remarked that their goals in developing the small engine were not only to reduce fuel consumption and carbon dioxide emissions, but also to demonstrate that three cylinders can be just as refined as four-cylinder powerplants.
He remarked they “tackled at source” the balance, noise and vibration issues typical of conventional three-cylinder engines, adding that they are confident that customers will be “pleasantly surprised by the results.” [source: Opel]