For the PDF version of this article, click here. While the motoring public waits breathlessly for the promise of a revolution in powertrain technology to materialize, the venerable gasoline-powered ...

In this transitional period between the gasoline and electric ages, there's still plenty of room, and plenty of motivation, for last-gasp improvements to the combustion engine – and a Swiss R&D ...

With the short block assembled for our 383 supercharged project motor, it's time to shift our attention once again; this time to the heads and valvetrain. Like the rotating assembly, when it came to ...

The valve train is probably one of the most complex and critical assemblies in a modern automobile engine. Its operation directly impacts engine efficiency and emissions. Engineers with the General ...

Secondly, adopting a digital valve train introduces a deluge of new variables that engineers can play with. There might be all sorts of benefits available, but getting to them requires an incredible ...

In order to set a stage for what follows, let's first revisit some of the fundamentals involved in how valve timing relates to power output. And to further clarify how "power" is defined in the ...

The UK inventors of an innovative valve-train technology which dispenses with the traditional camshaft claim it could radically improve petrol engine performance. Jon Excell reports Major leaps in ...

At its most basic level, an engine is an air pump. Internal combustion engines breathe fresh air and expel wasted exhaust gases to make power. Something has to tell those intake and exhaust valves ...

QUESTION: I have a 2006 Honda Accord four-cylinder with 105,000 miles. It has developed a clicking engine noise on a cold start. After the car has warmed up, the sound goes away. I have seen ...