The efficiency engine – cost-effective alternative to downsizing

Abstract

As an alternative to the familiar option of downsizing diesel engines, AVL has developed the so-called efficiency engine in collaboration with Renault. Because of the engine’s moderate power density, its peak pressure requirements are lower in some areas than those of turbocharged gasoline engines. Consequently, its mechanical friction and fuel consumption can be significantly reduced, as the comparison with a conventional and a downsized diesel engine demonstrates.

Investigations of the city bus powertrain efficiency

“…Despite the limitations associated with plans to phase out internal combustion engines from transport, research is still being carried out in this area [9,10]. Modern compression-ignition engines are characterized by high thermodynamic efficiency due to, among other things, the use of high-pressure fuel injection systems, turbocharging, and emission control systems [1,13]. The gearboxes are usually automated gearboxes whose control algorithms are adapted to the optimal engine operating conditions.…”