Community Research and Development Information Service - CORDIS

Better diesel with piston power

It's not always all about power. Combustion engines, whether diesel or gasoline, are looking for ways to increase power output whilst at the same time, reduce strain, fuel consumption and pollution. In this regard at least, diesel engines have the upper hand-but only at the higher compression ratios.
Better diesel with piston power
Ever since it's invention in 1892, the diesel engine has proven itself on many grounds. It is primarily a workhorse engine, powerful enough for huge loads, reliable enough to warrant minimum maintenance. However, there are fundamental problems associated with it that has made it an unpopular engine as far as the average consumer is concerned. Because the engine is designed around direct combustion methods, it is noisy and not very environmentally friendly. Stricter CAFE (Corporate Average Fuel Economy) standards have however, given the diesel engine new life, as the average gasoline engine cannot meet the mileage per litre requirements.

With compression ratios of 14:1 to as high as 25:1 the diesel engine is superior in its efficiency than gasoline cars. A recent development, manufactured by Ignacio Sarasua increases diesel efficiency even more. Based on Radial Power Core technologies, this innovative design allows diesel engines to perform at lower piston speeds whilst producing higher output speeds, therefore saving incredible energy in the torque-piston ratios. Due to the construction of these Radial Power Cores, the total engine speed is a sum of rotary and crankshaft speeds not solely dependant on the pistons themselves.

In a nutshell, the faster the pistons work through their cycles, the more torque (power) is produced just so long as the compression-combustion ratios remain optimal. Other advantages of this engine are found in the fact that the engine does not require a gearbox to regulate either power or speed ratios. The design allows for a modular building and is therefore, capable of easily maintaining nominal power regimes with high stability. As such, despite the fact that the design is in its preliminary stages, it should prove a valuable improvement to diesel engines, making them suitable for electric generation as well as vehicles such as trains, trucks and ships.
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