Injectors for heavy fuel oil may be internally cooled to ______.

Injectors for heavy fuel oil are often internally cooled to avoid carbonization of the nozzle tips. Heavy fuel oils typically have higher viscosities and can contain residuals that can deposit and solidify on the injector components when exposed to high temperatures. These deposits can cause clogging and reduce the efficiency of the fuel injection system. By maintaining a lower temperature within the injector, the risk of carbon buildup on the nozzle tips is minimized, which helps ensure reliable operation, optimal fuel atomization, and reduces the potential for engine performance issues.

This internal cooling mechanism is critical for maintaining effective fuel delivery and preventing the operational problems that arise from carbon deposits, which can lead to increased emissions, loss of power, and higher maintenance costs.