Diesel technology is developing rapidly and Concentric believes that pump design can play an important role in the process. Among the company's recent innovations are variable flow oil and water pumps, which together can offer fuel savings of between 2% and 8%, depending on drive cycle. They work by matching oil and water flows to the engine's requirements at all speeds, so reducing power wastage. There is an immediate benefit in terms of energy efficiency but even bigger savings are available if the engine's lubrication and coolant systems are re-designed to control and minimize these energy losses.

As legislation in Europe, Japan and the USA places ever more stringent demands on engine manufacturers, there will be a growing demand for innovations such as the Alfdex oil mist separator and Haldex's Varivent EGR technology.

Varivent uses variable venturi technology to reduce emission levels of nitrous oxides from turbo-charged diesel engines, whilst also providing low fuel consumption. It works by stimulating gas flow from the exhaust manifold to the higher pressure of the inlet, making the EGR rate independent of charge pressure.

Afldex is designed to meet Tier
4 legislation, which require crankcase emissions to be measured as well as those from the tailpipe. A proven centrifugal separator system removes oil droplets and soot from the vent gas and returns them to the sump, achieving an efficiency
of 98%.