Velocity of piston and rack assembly: An integral cam that work between segmental wheels, explained earlier, would work as a shock absorber to decelerate and accelerate the assembly at TDC and BDC. So the velocity curve is not a square wave. It would be just like a sine curve with a straight line at the top. Starting 45 degrees is like a sine curve's 0 to 90 degrees, the next 90 degrees is a horizontal line parallel to x axis and the ending 45 degrees is like the 90 to 180 degrees of a sine curve
@jhmumford: I can't give anything away, but if you think that two-stroke engines are "very polluting and inefficient," you may want to stay tuned for the new product that Evinrude will be revealing in less than two weeks.
Evinrude's first-generation E-TEC engines (DI two-stroke), which came out about ten years ago, were the first outboards to receive the EPA's Clean Air Award... and still have the lowest reportable emissions of any outboard, two-stroke or four-stroke. Now Evinrude is planning to unveil a new era of ourboards. All I can say is: prepare to be surprised.
Most of the new 3D printers and 3D printing technologies in this crop are breaking some boundaries, whether it's build volume-per-dollar ratios, multimaterials printing techniques, or new materials types.
Independent science safety company Underwriters Laboratories is providing new guidance for manufacturers about how to follow the latest IEC standards for implementing safety features in programmable logic controllers.
Automakers are adding greater digital capabilities to their design and engineering activities to promote collaboration among staff and suppliers, input consumer feedback, shorten product development cycles, and meet evolving end-use needs.
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