汽车方面论文英语翻译.doc

Thesis: Automotive Engine Cooling System Maintenance
Introduction: If an engine cooling system repair rate has been high, often caused by ponents of the engine damage, especially with the increase in vehicle mileage, the work efficiency of the cooling system of gradual decline in the overall ability of the engine greater impact, the importance of the cooling system is maintenance work in the engine room temperature, just like the skin and sweat glands of the body, if one day, the body's sweat glands are not working properly, the body's heat will not be able to disperse, ranging from produce heat stroke, re- then the shock.
The role position of the first chapter of the cooling system
The function of the cooling system is taken away by the engine due bustion heat generated by the engine to remain within the normal operating temperature range. Engine in accordance with the manner of cooling can be divided into air-cooled engines and water-cooled engines, air-cooled engines rely on engine-driven fans and air flow to cool the engine when the vehicle; water-cooled engine is cooled by cooling water circulating in the engine to engine. Regardless of mining the way in which cooling, the normal cooling system must ensure that the engine in all sorts of driving environments are not caused by overheating.
The water cooling system is posed by the radiator, thermostat, water pump, waterway, fan. The radiator is responsible for circulating water cooling, water pipes and heat sinks use of aluminum, aluminum pipes made of flat shape, the heat sink with a corrugated, focusing on the thermal performance, installation direction perpendicular to the direction of air flow, as far as possible do drag is small, higher cooling efficiency. The radiator is divided into horizontal flow and vertical flow of two types of air conditioning condenser is usually its fit together.
Water pump and thermostat.
Engine by the coolant loop, ponents of forced coolant circulation pump, driven b