What is common-rail diesel?

Common-rail diesel is a fuel injection system used in diesel engines that allows for multiple injections of fuel into the combustion chamber at high pressure. This technology improves engine efficiency, reduces emissions, and enhances performance by allowing precise control over the timing and quantity of fuel injected. The "common rail" refers to a shared fuel rail that delivers diesel to individual injectors, enabling better atomization and combustion. This system has become standard in modern diesel engines for its benefits in power and fuel economy.