Bosch 120 (CRIN2) series injectors are mostly installed in commercial vehicles, supporting the medium and heavy vehicles above. Its working principle is similar to the Bosch 110 injectors! But in the maintenance of the division of the stroke, the spring force matching and the flexibility between the parts require more stringent specifications! Bosch 120 (CRIN2) is divided into two types of engine assembly: built-in and external, both of which are very similar to each other in terms of internal structure

Due to a large amount of oil into the combustion chamber evaporated into oil and gas, the end of the combustion from the exhaust pipe discharge. Failure causes. (1) too much oil in the oil sump. (2) supercharger oil seal damage caused by oil into the combustion chamber. (3) the cylinder is seriously on the fugitive oil. (4) valve stem and duct wear, excessive clearance, valve duct seal failure. Blue smoke diagnosis and elimination methods. (1) check the oil sump

Cause: Due to the diesel fuel entering the combustion chamber after evaporation is not burned, milky white from the exhaust pipe discharge; or diesel fuel has water, water evaporates in the cylinder to form steam, water vapor is white when discharged. Cause of failure. (1) there is water in the diesel fuel or because the cylinder gasket wash bad, cylinder head or cylinder rupture leakage, so that the cylinder into the water. (2) cylinder pressure is too low. (3) working