Engine: Description and Operation

Engine block





The V6t Ecopower is a fluid-cooled, 6-cylinder V-engine with twin camshafts on each cylinder head and four valves per cylinder. The angle between the cylinder banks is 54�. Cylinder capacity is 3.0 liters.
The camshafts are driven by an internally cogged belt and the engine features automatic purging of the air in the oilways supplying oil to the tappets, an integral heat exchanger for the engine oil and a torque member, which stabilizes the block round the main bearings.
The heat exchanger has a dual function, namely to heat the oil when starting from cold and to cool the oil at working temperature.
The V6t Ecopower is a compact and lightweight engine developing high torque at low rpm. It is characterized by low emission levels and low fuel consumption. This is the result of a number of engineering solutions such as asymmetric turbocharging, the Saab Trionic engine management system and four-valves-per-cylinder technology.
The V6t Ecopower is the first engine in the world to feature asymmetric turbocharging. The exhaust gases from one of the V6 engine's cylinder rows drive a turbocharger, which supercharges both rows of cylinders. Asymmetric turbocharging was developed to combine the superior torque, low fuel consumption and environmental advantages of the turbo engine with the smoother running and balanced sound of the V6 engine.
Due to asymmetric turbocharging, the engine already develops its maximum torque, 310 Nm, at 2100 rpm. As a result, the engine runs very quietly and is relaxing to drive since it doesn't need revving up to give of its best.