Efficiency+ crawler cranes, piling and drilling rigs
Efficiency-enhancing engine features
The newest Liebherr drive and control systems offer several optional features that help to reduce fuel consumption and maximize the reliability and productivity of crawler cranes, duty cycle crawler cranes as well as piling and drilling rigs.
Downsizing of the engine
Thanks to the machine’s optimized hydraulic system, the size of the primary source can be reduced without negative effects on the turnover. The efficiency is thus significantly increased while the fuel consumption is decreased.
Engines of the latest generation
All diesel engines complying with Stage IV/TIER 4f have a limited maximum speed of 1,700 rpm. This contributes to fuel savings of approximately 5% compared to previous engines.
With the help of this feature the engine speed is reduced to a predefined, required level. Hence, a notable reduction in diesel consumption can be achieved without any impact on operational output. As a further benefit noise is also reduced by the Eco-Silent Mode.
Lowering speed of engine while idling
Deep foundation rigs and duty cycle crawler cranes are in idling mode for 45% of their operating time. This figure lies at even 60% for crawler cranes. With the lowering of the engine speed from 950 rpm to 750 rpm while the machine is in idling mode, up to two litres of fuel per hour can be saved.
Automatic engine stop control
The engine switches off automatically during longer work interruptions after having checked certain system functions including the actual charge level of the battery, the operating temperature of the engine as well as the control that all machine functions are deactivated. This saves fuel and reduces emissions. At the same time the machine has fewer operating hours, thus increasing its residual value, extending both its warranty and the maintenance intervals.