Why air bleed scrawl is provided in fuel injector?

Air bleed scrawl in a fuel injector is designed to improve fuel atomization and combustion efficiency by ensuring that any trapped air in the fuel system is purged. This feature helps maintain consistent fuel delivery and pressure, preventing issues such as vapor lock or inconsistent engine performance. By allowing air to escape, the injector can operate more reliably, contributing to smoother engine operation and reduced emissions. Overall, it enhances the injector's functionality and longevity.