lucas injector nozzles 0 460 494 249 for RENAULT are spring-loaded closed valves that spray fuel directly into the combustion chamber or precombustion chamber when the injector is opened. Injector nozzles are threaded or clamped into the cylinder head, one for each cylinder, and are replaceable as an assembly.

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The tip of the injector nozzle has many holes to deliver an atomized spray of diesel fuel into the cylinder of the Engine. Parts of a diesel injector nozzle include:

Heat shield. This is the outer shell of the injector nozzle and may have external threads where it seals in the cylinder head.

lucas injector nozzles 0 460 494 249 for RENAULT. This is the inner part of the nozzle and contains the injector needle valve and spring, and threads into the outer heat shield.

Diesel injector needle valve. This precision machined valve and the tip of the needle seal against the injector body when it is closed. When the valve is open, diesel fuel is sprayed into the combustion chamber. lucas injector nozzles 0 460 494 249 for RENAULT is controlled by a computer-controlled solenoid on diesel engines equipped with computer-controlled injection.

Injector pressure chamber. The pressure chamber is a machined cavity in the injector body around the tip of the injector needle. Injection pump pressure forces fuel into this chamber, forcing the needle valve open.