A year or so ago I wrote about the scourge of potholes for drivers, cyclists and other road users. They are a by product of constantly using a surface, rather like wearing out a shirt or pair of jeans. The only difference is that they are dangerous and expensive to repair. I would think that many motorists who pay a sizeable chunk of their earnings in taxes (income, sales, rates etc) would like to see the problem go away or heavily reduced. Potholes start with a surface that has some weakness in it. Then with changing weather and traffic conditions the surface layers start to break up. Often local Government workers come along and bodge the repair which inevitably makes the problem worse! In the last article I discussed some of the methods used to make the repairs more reliable and how different materials are being tested to ensure that the surface lasts longer, however there is another important step before repair - finding them. This can be a costly affair with workers being … [Read More...]
Ford has patented a device called a Charge Motion-Control Valve system that regulates air to a direct injection motor and this enables the engine to be docile and an animal at different times.
Variable valve timing is a way to provide an engine with a Jekyll and Hyde personality. One cam lobe is mild and one is aggressive. My experiences with this is courtesy of Honda.