A look into the exhaust gas recirculation, or EGR, valve - an important piece of the automotive emissions system.

As mentioned, the EGR valve in your diesel engine is an important component, both for your vehicle's performance and the environment. However, like many other auto parts, it's subject to wear and ...

We're getting an earful of the dual-mode active exhaust on the GMC Sierra 1500 pickup with the following exclusive video, showcasing the valves open and closed. News Podcast ...

Exhaust-valve timing: By controlling the camshaft timing independently, the engine controller can adjust the amount of overlap—the period when both the exhaust and intake valves are open.

Joshi tells Road & Track that the valve’s open/close position while driving is all throttle-dependent, so you can’t open it via changing drive modes. What it results in is a car that’s quiet ...

With optional magnetic ride control, active exhaust, and four dynamic driving modes, the 2016 Camaro SS is ready to butt-heads with the 2015 Mustang GT.

In the early 1900s, the sliding sleeve valve engine had some advantages over tappet valve engines of the time. For example, sliding sleeve valve designs allowed larger intake and exhaust ports, a ...