The drive to develop lighter-weight engines that offer more power continues to spark start-up companies. Two of them, Vengeance Power Inc. and WaveTech Engines, Inc., displayed their first physical prototypes at the 2010 SAE World Congress.
Vengeance makes a crankless rotary engine, while WaveTech’s reciprocating piston design changes the way energy is converted from linear motion to rotation. Both claim to substantially reduce fuel consumption over conventional engines with comparable power levels.
Vengeance's design utilizes a series of spring-loaded vanes that rotate in an altered elliptical pattern. The vanes are always at a 90° angle when the spark plugs fire, maximizing the amount of power in each combustion cycle, according to company engineers.
The initial engine, which measures 22 x 27 x 18 in (559 x 686 x 457 mm), delivers a claimed 580 hp (433 kW) at 1200 rpm. It weighs 280 lb (127 kg). The company plans to address military and marine markets.
WaveTech increases compression ratios and lowers heat in the cylinder, improving the fuel ratios while reducing emissions. It uses a double-helical cam to convert linear motion to rotating power. The 75-lb (34-kg) reciprocating-piston engine provides the output of a 6.2-L engine. The prototype uses an opposing piston configuration.