Fig. 209. Glow plugs in a head of the block of cylinders

At cold start-up of the engine fuel is injected into the combustion chamber slightly earlier. Thus, the sprayed fuel has more time to ignite from the compressed air and a glow plug. After engine start-up a glow plug some time continues to operate that improves operation of the engine idling, reduces noise and reduces carbon emissions (fig. 209) .