Nissan has developed a diesel engine which it says is 40% more efficient than standard models.
The engine is featured in the Cypact concept car, unveiled at the Frankfurt Motor Show last month, and uses a new technology called modulated-fire (M-Fire) combustion.
The M-Fire combustion engine burns fuel at a lower temperature than normal diesel engines. The technology uses electronic fuel injection and recirculates exhaust gas to improve efficiency. The exhaust gas is recirculated through the engine’s combustion chambers, which have been engineered to improve combustion. The flow of air into each cylinder is controlled to match the air available for combustion with the engine speed.
The engine features a fuel injection pump to improve atomisation, making the fuel burn more efficiently, with greater power output and less soot. It features a 16-valve dual overhead cam to improve induction efficiency. A variable nozzle turbocharger has also been designed to improve response when accelerating.
The Cypact’s engine can power it for 100km on three litres of fuel, producing carbon dioxide emissions of less than 90g/km. It produces 55kW (73.95bhp) at 4,200rpm, and a maximum torque of 160Nm at 2,000rpm.
Nissan will make M-Fire engines ranging in size from 2.2 litres to 3.0 litres. The first will appear in the new Almera next March.