Well-made tools and machines are useful without knowing the mechanism, but sometimes they are touched by taking their eyes off of their mechanisms. There is a site which introduces the mechanism of ...

June 19, 2007 Toyota has developed a new form of valve actuation for internal combustion engines which it claims improves fuel efficiency by 5 to 10 per cent, enhances throttle response, reduces CO2 ...

American publisher Charles Knight was not at all impressed with his new 1901 Knox ‘gasoline runabout’. Like some other cars of the era, its four-stroke engine relied on a single valve to permit both ...