Nissan Motors is introducing a new petrol engine that produces just 95g/km of carbon dioxide, one of the lowest in the world today. This means that the company’s drive on reducing emissions is not only restricted to creating electric vehicles like the award-winning Nissan LEAF. The engine, known as the DIG-S, is a direct injection unit with a supercharger; hence the car's name: Direct Injection Gasoline-Supercharger.
The engine has been designed to meet and exceed the everyday driving demands of the modern world and is the ideal partner for Nissan’s smallest city car, the Micra. The engine delivers an excellent performance, exceptionally low emissions and frugal economy and technical innovation.
The DIG-S employs the Miller cycle and direct petrol injection to increase the compression ratio to 13 to 1 for greater combustion efficiency and a supercharger for instant throttle response and added power.
In addition to ultra low CO2 emissions, the lightweight and low-friction 1,198cc three-cylinder unit produces the power expected from a conventional 1.5-liter four-cylinder engine and the results are spectacular. With a manual speed of 112mph for manual, the DIG-S engine produces 72kW (98PS) and 142Nm, while CO2 emissions are 95g/km for the manual version and 115 g/km for the CVT version.
The manual Visia version’s combined cycle fuel economy figure is 68.9mpg. By decreasing heat, friction and pumping losses as much a possible, Nissan's engineers have created an engine that sets the standard for the rest of the industry.
The three-cylinder configuration gives many benefits including less weight and further reductions in friction loss, thanks to having fewer moving parts. More gains are made, owing to the adoption of advanced engine management systems with Start/Stop and energy regeneration.