KRYOTEC ENGINE 26 16. Lugging Engine Lugging is running the engine at a lower RPM in a condition where a higher RPM (more power/torque) should be implemented. Especially susceptible on vehicles equipped with a manual transmission. This driving habit causes more stress loading on the piston and can lead to increases in engine oil consumption. 17. Turbocharged Engines There is a possibility for higher crankcase pressure (as compared to naturally aspirated engines) which is normal for turbocharged engines. This condition causes varying amounts of engine oil to enter the intake manifold, charge air cooler and associated plumbing to and from the charge air cooler, also a leaking turbocharger seal will draw oil into the combustion chamber where it will burn (blue smoke from tail pipe may be present) and form carbon deposits which contribute to further oil consumption as they interfere with proper engine function. 18. Restricted Air Intake Excessive restriction in the air intake system will increase engine vacuum and can increase oil consumption, an extremely dirty air filter would be one example of this situation. Maintenance Instructions for Common Rail Common rail refers to a small fuel accumulation tank called Rail, where the pressure of the fuel remains almost constant and always available to injectors. The high-pressure pump compresses the fuel at a pressure of 1600 bar and transfers it through a connection pipe to the high-pressure accumulation duct or Common Rail. The common rail then softens the pressure oscillations caused by the opening and closing of the injectors and by the continuous discharge of the high pressure pump. The fuel is then transferred from the common rail through pipes to the electronic injectors Due to high pressure developed in the common rail system, care and cleanliness is of utmost importance during removal and installation of the common rail system. Tiny dust particles (0.2 mm) can block injector nozzle in opening position, which will then continuously inject fuel into the cylinder there by increasing the cylinder pressure leading to engine damage. NOTE The ambient conditions to store common rail parts are: -30°C to +60°C, and humidity between 0 to 80%. The nozzle holder should not place in or near a magnetic field source above 400 A/m. All system components must be thermally sealed in plastic bags and clearly labeled. Prior to working on common rail system, the technician must thoroughly wash hands before and during the work as necessary. WARNING Smoking is strictly prohibited while working on common rail system, as the system is under high pressure and may cause serious injury, or component damage. Prior cleaning of engine and injection system Clean the area around the engine and then fuel injection system with clean brush and degreasing agent. Cover electrical unit’s viz., starter, alternator etc., to avoid fuel spray/splash. Clean the joints and external surface of the injection system and each connection that is to be opened, by a vacuum cleaner. The surface of the workstation on which the work on common rail is to be carried, should preferably be stainless steel. The workplace should be a closed room, clean and free from machine tools and welding equipment.
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