论文部分内容阅读
发动机冷却系统的主要故障有三种:发动机过热,冷却液温度过高甚至“开锅”;发动机冷却液温度过低;冷却系统泄漏等。在这些故障中,以发动机过热最常见,驾驶中会出现以下现象:发动机的实际进气量减少、燃烧不完全、马力减少、行驶无力、阀门容易积碳;噪音增加、换新的机油依然无法解决;加速时燃烧室提前引爆(早燃、爆燃)、油门重、耗油增加;润滑油粘度指数降低,严重时“吃”机油;废气中的有害物质浓度增大,排气管很黑,根本没有水珠喷出,增加环境污染。因此对冷却系统的故障应及时进行分析和解决。
Engine cooling system has three main faults: the engine overheating, coolant temperature is too high or even “boil”; engine coolant temperature is too low; cooling system leakage. In these failures, the most common cause of overheating of the engine is the following phenomena during driving: the actual intake air quantity of the engine is reduced, the combustion is incomplete, the horsepower is reduced, the driving force is weak, and the valve is easy to coke up; the noise is increased and renewed oil still can not Solution; accelerating the early detonation of the combustion chamber (pre-ignition, deflagration), the throttle heavy, fuel consumption increased; viscosity index of lubricants to reduce the serious “eat ” oil; exhaust gas concentrations of harmful substances increased exhaust pipe is Black, there is no water spray, increase environmental pollution. Therefore, the cooling system failure should be promptly analyzed and resolved.