Tuesday, January 18, 2011

The Double Crank Engine

I wonder why all engines today use the standard 4 bar linkage when there is a really good option available in the "cartwright straight line mechanism" also know as the double crank mechanism. Refer to


for details on the mechanism.

I have also prepared a simple CAD based animation of the mechanism. This is given below.

What you can see here is a possible mechanism for an engine that is conveniently conventional & at the same time, there is no side thrust between the piston & the cylinder liner.

This will have good benefits in terms of

1) Mechanical efficiency

2) Good durability at very high speeds & loads

I believe that this will be the configuration of engines in the future.

Already, a couple of people have built such engines.

1) http://www.neander-motors.com/

2) http://www.patentstorm.us/patents/5595147/description.html

So what do you think of this system?


Saturday, March 8, 2008

sonic foam pressure contours

above pic is from my code (pressure in bar)

above pic is from sonicfoam output (pressure in Pa)

Friday, December 21, 2007