AIR INTAKE SYSTEM FOR IMPROVING ENGINE PERFORMANCE ON LOW TEMPERATURE CLIMATE

摘要

The present invention relates to an air intake system for improving engine performance at low temperature in order to enable an operation up to the rated load of an engine within endurance limits even in the conditions of an extremely low temperature by preventing the maximum pressure of combustion inside a combustion chamber from becoming greater than the endurance limits of the engine since the temperature of inhaled air is extremely low. In the air intake system according to the present invention, a turbo charger (4) is installed in an exhaust duct line (2a) to operate a compressor (4b) by rotating a turbine (4a) using the energy of exhaust gas, an air inlet duct line (6a) is connected to an air cleaner in the entrance of the compressor (4b) of the turbo charger (4), an air intake duct line (6b) connected to the combustion chamber of the engine is extended from the outlet of the compressor (4b), and an air cooler (8) is installed in the air intake duct line (6b). The present invention: connects the air inlet duct line (6a), which is the downstream of the air cleaner and passes through the inlet of the compressor (4b) of the turbo charger (4), by extending a compressed air collecting pipe (30) from the air intake duct line (6b) of the outlet of the compressor (4b) of the turbo charger (4); installs a blow-off valve (40) in the middle of the compressed air collecting pipe (30); and sends air back to the compressor (4b) of the turbo charger (4) by collecting a part of compressed air, which comes out from the turbo charger (4) and goes to the combustion chamber, by the control of the blow-off valve (40) and mixing the collected part of the compressed air with air flowing in the air inlet duct line (6a).