Small is beautifully engineered for Volvo
Volvo moves forward under full Chinese ownership with the dowry from Ford of two highly efficient 1.6-litre petrol engines for its S60 and S80 models. Sales start this autumn.
The days when larger cars needed big engines are over at Volvo. The 150hp T3 and the 180hp T5 use direct injection turbocharger fuelling for high economy and high torque. On both 1.6-litre engines, each injector has been positioned centrally above the piston, just beside the spark plug. The injectors have six holes each which offer finely atomised fuel distribution.
The centrally located multihole injector makes it possible to control fuel dosage precisely. In cold starts, the fuel is sprayed into the middle of the combustion chamber just prior to ignition.
“Small, high-performance GTDi engines are a part of our bid to get more energy out of smaller engines,” says Magnus Jonsson, senior vicepresident of product development at Volvo.
“The high fuel injection pressure of 100 bar means less fuel ends up on the cold combustion chamber walls. This helps cut emissions and considerably reduces the amount of fuel consumed.
“Another effect is a major reduction in the amount of soot particulates compared with a side-positioned injector,” says Mr Jonsson.
Volvo developed the system in collaboration with its makers, Bosch.
The manual gearbox version has stop-start ignition while the automatic has a freewheel system to reduce rolling resistance and improve fuel consumption. Mileage and emission figures are awaited.
VOLVO S60: Efficient engines.