Instead of intake and exhaust valves, the patented LZ-1 IC engine uses intake and exhaust pistons and a power piston. As the intake piston passes the intake ports, a fuel charge fills the volume between the three pistons. All three pistons then compress the fuel charge, and two or three spark plugs ignite it. The three pistons then act as power pistons, driving three crankshafts. In the existing prototype, a chain links the crankshafts. During the exhaust stroke, the exhaust piston opens the exhaust ports, and the power piston forces about 80% of the exhaust out the ports. The exhaust piston generates a vacuum that scavenges the remainder of the exhaust. Vacuum produced by the exhaust piston helps draw in the new fuel charge.
John A. Spera, Creative Innovations, Box 470518, Broadview Heights, OH 44147-0518, 216-387-0257.
Its inventor reports that the LZ-1 engine can achieve higher compression ratios and a more effectively controlled combustion process than a conventional IC engine.
Samsung's Galaxy line of smartphones used to fare quite well in the repairability department, but last year's flagship S5 model took a tumble, scoring a meh-inducing 5/10. Will the newly redesigned S6 lead us back into star-studded territory, or will we sink further into the depths of a repairability black hole?
In 2003, the world contained just over 500 million Internet-connected devices. By 2010, this figure had risen to 12.5 billion connected objects, almost six devices per individual with access to the Internet. Now, as we move into 2015, the number of connected 'things' is expected to reach 25 billion, ultimately edging toward 50 billion by the end of the decade.
NASA engineer Brian Trease studied abroad in Japan as a high school student and used to fold fast-food wrappers into cranes using origami techniques he learned in library books. Inspired by this, he began to imagine that origami could be applied to building spacecraft components, particularly solar panels that could one day send solar power from space to be used on earth.
Biomedical engineering is one of the fastest growing engineering fields; from medical devices and pharmaceuticals to more cutting-edge areas like tissue, genetic, and neural engineering, US biomedical engineers (BMEs) boast salaries nearly double the annual mean wage and have faster than average job growth.
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