Cylinder wall scoring is a form of progressive mechanical failure where the lubricant film between the piston rings and the ...

GM has filed a patent application a variable displacement valvetrain system with rocker shaft porting and insert sleeves for ...

Some Enginology columns ago, we spoke about the functionality and benefits derived from in-cylinder pressure measurement in increments of crankshaft angles. In that discussion, we noted several useful ...

General Motors has filed a new patent that offers a look at how the company may be rethinking cylinder deactivation for its ...