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.
Some humanoid walking robots are also good at running, balancing, and coordinated movements in group settings. Several of our sports robots have won regional or worldwide acclaim in the RoboCup soccer World Cup, or FIRST Robotics competitions. Others include the world's first hockey-playing robot and a trash-talking Scrabble player.
A recent example of a major CAE revamp is MSC Apex, released last month by MSC Software Corp. In a discussion with Design News, MSC executives noted that its next-generation platform is designed to substantially reduce CAE modeling and process time, “in some cases from weeks down to hours.”
The Thames Deckway would run for eight miles close to the river’s edge, rising and falling slightly with the tidal cycle. It will generate its own energy from a series of devices that will line the pathway and use a combination of sources to make the path self-sustaining.
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.