Injector (CRS)

Injectors inject fuel vaporized by the common rail system (CRS) into the combustion chamber. Injectors are located inside the cylinder head and are connected to the fuel rail. Based on signals from the engine ECU, CRS injectors inject high-pressure fuel at the optimal injection timing, injection quantity, injection rate, and spray state into the engine's combustion chamber. Injection is performed by finely injecting fuel multiple times in accordance with the combustion stroke. The first small injection moderates the initial combustion to reduce the generation of NOx (nitrogen oxide) and noise. Full-scale combustion is performed during the following main injection, after which diffusion combustion is activated during the final process to reduce PM (particulate matter) generated during the main injection.