Comments by "John Burns" (@johnburns4017) on "The Scotch Yoke Engine is Alive! 8 Pistons, 4 Rods" video.

  1. One of these engines was built and inserted into a Ford Granada in England - about 25-30 years ago. It gave far more torque, especially at the low rev range, reducing the size of the transmission, or if designed right for a particular car, and body designed for the engine, no transmission at all. The flat boxer-type arrangement also gave a lower centre of gravity. It was pretty smooth going by reports, which was encouraging.
    1
  2.  @jimmydesouza4375  wrote: "Battery tech hasn't improved since the 90's." Are you kidding!
    1
  3. The eight cylinders is really four cylinders. The opposed cylinders have the same centre line. It is four cylinders with the crank take off in the middle of the cylinder. The arrangement reduces piston side thrust, and hence friction.
    1
  4. The application of a constant speed generator (range extender) is ideal for a Scotch Yolk. As a range extender, the engine by nature will be a part time engine, giving longevity. The problem with a Scotch Yolk is the lubrication of the yolk at high revs and varying speeds. This problem can be eliminated using it at a constant speed, with revs as low as can be. Lower constant revving is possible as the engine generates more torque at lower revs. A lot of oil is lost from the yolk bearing to the sump pan, as oil drops from the yolk bearing to the bottom of the engine, compared to traditional big end bearings, so a larger pan of oil may be needed. Unlike traditional big end bearings where a small amount of oil gathers in the bottom of the bearing when the engine is off ready for turning over the engine, no oil gathers in the Scotch Yolk's sliding bearings. The oil pressure may need to be primed, with a small electric priming pump, before the engine turns over, to get sufficient oil to the yolk bearing before movement. This gives a small light package for fitting in out of the way locations in vehicles. The only other engine of this size and weight will be the new Wankel engine being used as a constant speed range extender in the new Mazda MX-30
    1
  5. The ICE is slowly dying. The end will be quick.
    1