Volvo has developed its D16 16.1-L truck engine to produce 700 PS (515 kW). The engine is the most powerful available in a European production truck. It meets the Euro-5 emissions standard, which will become effective for new vehicles in the European Union on Oct. 1.
Currently, the highest output from the D16 Euro-4 engine variant is 660 PS (485 kW). For Euro 5, there will also be 600- and 540-PS (441- and 397-kW) variants. All Euro-5 versions will be designated D16G. Compared with Euro-4 versions, emissions of oxides of nitrogen will be reduced by approximately 40%. Volvo claims that the engine uses no more fuel than the 660-PS Euro-4 compliant version.
Measures to optimize combustion include redesigned pistons. The engine is equipped with a new oil thermostat, said to have a favorable effect on fuel consumption.
Fuel injection is by electronic unit injectors, which include a pre-injection pulse for Euro 5. Volvo claims that this has reduced combustion noise at idle by 2dB(A).
The engine uses selective catalytic reduction (SCR) to reach the emissions limits, using the AdBlue urea-based additive. The 600- and 700-PS variants of the engine will be fitted with a larger SCR system to help reduce exhaust backpressure and minimize power losses. Other changes include a new electronically controlled exhaust brake, which will be fitted to the engine as standard. This can supply 230 kW (313 PS) of braking power. Alternatively, the optional Volvo Engine Brake (VEB+) will offer up to 425 kW (578 PS) of braking power.
The 700-PS engine has been designed for applications in markets such as Sweden, which permit a maximum gross combination weight of 60 t (66 ton). This is mainly to serve Sweden’s lumber industry. Volvo has carried out extreme temperature testing with the FH16-700 in Australian deserts and carrying lumber in northern Sweden and has conducted altitude testing at up to 3600 m (11,800 ft) in the Rocky Mountains.
The D16G engine is equipped with a turbocharger and intercooler. Design features include a single overhead camshaft and four valves per cylinder. Both the crankshaft and camshaft are equipped with hydraulic vibration dampers to help contain noise and vibration. The engine can be specified with closed crankcase ventilation as an option.
Timing gear is fitted at the rear of the engine, where it supplies drive to the power steering pump, oil pump, fuel supply pump, and air compressor. Volvo claims that fitting the timing gear at the rear improves engine cooling since the flow of cooling air is not obstructed.
Cylinders six, inline
Fuel injection electronic unit injector
Maximum power 700 PS (515 kW) at 1550-1800 rpm
Maximum torque 3150 N·m (2323 lb·ft) at 1000-1550 rpm
Maximum revs 2000 rpm
Bore/stroke 144/165 mm (5.7/6.5 in)
Compression ratio 17.3:1
Exhaust brake 230 kW (313 PS) at 2000 rpm
Exhaust brake VEB+ 425 kW (578 PS) at 2200 rpm
Economy band 1000-1500 rpm
Oil capacity 42 L (11 gal) including filters
Cooling capacity 48 L (13 gal)
Dry weight 1325 kg (2921 lb) (base engine)