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Enhanced performance

Volvo Construction Equipment has launched its G-Series range of wheeled loaders, claiming the L150G, L180G and L220G provide a 20% increase in lifting force compared with previous ranges.

The G-Series meets the requirement of the European Stage IIIB and US Tier 4i emissions legislation that came into force on 1 January 2011. The L150G, L180G and L220G all feature a 13-litre, six-cylinder turbocharged Volvo Advanced Combustion Technology off-highway diesel engine, that features cooled gas recirculation and an active-diesel particulate filter with active regeneration. The filter temporarily holds particulate matter and then incinerates it, further reducing emissions. This process is constructed without any loss of performance.

Producing between 200 and 274kw (300-371hp), depending on the model, these three units provide high torque at low engine speed. Volvo claim the D13 engine also leads the industry in terms of fuel efficiency, reliability and noise. The production of torque and power at low engine speeds, combined with load-sensing hydraulics, removes the need to overrun the engine, which extends engine life as well as lowering fuel usage and dramatically reducing noise.

A variable geometry turbocharger (VGT) has been introduced on the G-Series wheeled loaders. The VGT is designed to vary the airflow continually into the engine. A sliding nozzle allows the exhaust gas flowing into the turbine wheel to vary to provide rapid boost at low engine speeds - and to achieve and maintain high boost at higher engine speeds. This contributes to good engine response across the entire engine speed range.

As well as boasting a 20% increase in lifting force, there is also a 10% increase in breakout force compared with previous ranges. The improvement ensures smooth, full buckets, resulting in faster cycle times and increased productivity.

Two stronger, variable displacement load-bearing axial piston pumps and hoses have been introduced to handle the increased pressures. These provide superior control of the load and attachment, as well as high breakout force, faster lifting and tilt functions. A new hydraulic cooling system has been designed to reduce the working temperatures by up to 20˚C over previous models. And the hydraulic oil-return filter has improved from 20 micron to 10 micron to protect the pumps from potential contamination.

The transmission of the vehicle features the company’s Automatic Power Shift (APS) concept, which ensures the loaders always operates in the ideal gear by sensing engine and travel speed, kick-down, engine braking and other factors. Offering operators a choice of four gear shifting programs, APS results in more efficient work cycles with lower fuel consumption and wear.

The range also features the Optishift system, which is a new torque convertor with lock up and free wheel stator. It integrates the Volvo patented Reverse-by-Braking (RBB) function, which cuts fuel consumption by up to 15%. When changing from forward to reverse (or vice versa), RBB applies the standard brake instead of the torque converter and transmission.

It therefore helps to reduce fuel consumption on operations such as load and carry, as well as in short cycle loading. The driveline lock up improves drive response, rimpull and incline performance.
www.volvoce.co.uk

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