Making engines more efficient

2014-02-10 - An ABB turbocharging solution is achieving some remarkable improvements in gas and diesel engine performance, while cutting fuel consumption and NOx emissions.

By ABB Communications

The solution consists of two ABB turbocharging technologies that mesh together perfectly to provide a highly potent solution for two- and four-stroke gas and diesel engines.

Investigations for the power generation, marine and heavy-duty vehicle sectors show that the solution has reduced fuel consumption by up to 10 percent, slashed nitrogen oxide (NOx) emissions by as much as 60 percent, and improved engine performance, flexibility and stability.

These are truly impressive achievements that demonstrate that the two technologies really do deliver fuel efficiency, low emissions and engine stability.

VCM and Power2 are two complementary technologies that tame the tradeoff between fuel efficiency and NOx emissions.

The solution consists of ABB’s variable valve train system – Valve Control Management, also known as VCM® - and two-stage turbocharging system, Power2®.

VCM is an electro-hydraulic cam-supported valve train system that automatically provides the engine with the optimal amount of air for different speeds, loads and operating conditions. This enables, among other things, the turbocharger to take the engine from idling to full load in at least half the time it usually takes.

As a result, a turbocharged engine equipped with VCM operates with optimal air supply and maximum efficiency at all times, even those engines that require large operating ranges and fast load responses. This, in combination with Power2, reduces engine fuel consumption, NOx emissions and the engine’s thermal load.

Power2 is a two-stage turbocharging system that uses two turbochargers in series to create pressure ratios higher than the best single-stage turbochargers. High turbocharging pressure ratios enable the engine to operate continuously at its most efficient point in terms of power output, fuel efficiency and minimal emissions.

Together, VCM and Power2 successfully tackle one of the dilemmas of engine emissions reduction - the tradeoff between fuel consumption and NOx formation. The dilemma is that NOx reduction methods that use internal engine processes normally increase fuel consumption. The VCM-Power2 solution does not do this. It solves the dilemma by shifting the tradeoff into a new and much lower range that boosts fuel efficiency without compromising emissions. And it does so across an extensive range of engines and applications.

Used on their own VCM and Power2 have a well-documented track record of significant and valuable engine efficiency improvements. Used together, they take engine efficiency into a new dimension and enable engine builders and end users to meet the challenges of emissions compliance and cost efficiency.

ABB Turbocharging is the world’s leader in turbocharging large diesel and gas engines.

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