Today, with the rapid development of the car industry, the requirements of car repair skills are constantly improving. Car engine is the power source of car, its structure is extremely complex, and the causes of hair pathogens are various. In view of the common faults of car engine, this paper summarizes the common faults and repair methods according to the experience of actual repair operation.

发动机常见毛病修理策略

Repair Strategy for Common Engine Faults

（一）控制润滑油耗费

(1) Controlling Lubricant Consumption

发动机正常运行不可避免地要耗费一定量的润滑油，润滑油耗费反常往往对应着发动机的某种毛病。出现润滑油耗费反常，首要应该查看油质、油量，必要时更换润滑油，避免因油质问题造成发动机不能正常运行。在扫除油质问题后，应该逐个排查相关零部件，或许因为零部件严重磨损，配件间隙过大或许机油压力过高，导致机油上蹿进焚烧室。而机油的渗漏首要是因为密封垫变硬老化，气门卡死。

The normal operation of the engine inevitably consumes a certain amount of lubricating oil. The abnormal consumption of lubricating oil often corresponds to some faults of the engine. In case of abnormal consumption of lubricating oil, the first thing is to check the quality and quantity of oil, and change the lubricating oil when necessary, so as to avoid the abnormal operation of the engine caused by oil quality problems. After cleaning up the oil quality problems, we should check the relevant parts one by one. Perhaps because of the serious wear and tear of the parts, the gap between the parts is too large or the oil pressure is too high, the oil leaps into the incinerator. The leakage of oil is mainly due to the hardening and aging of the sealing gasket, and the valve is stuck.

（二）及时监测发动机过热

(2) Timely monitoring of engine overheating

冷却液温度反常时，会在轿车仪表盘上报普提示，在发现冷却液温度反常时，应泊车查看，看冷却液是否走漏。需要注意的是，热车时不能立刻停机，也不能立刻加注冷却液，而是要等发动机温度正常后再操作。假如冷却液不少，应排查发动机节温器，风扇散热器毛病。发动机过热问题，需要轿车驾驶员把握根本的知识与修理办法。要对发动机进行定期保养检测。

When the temperature of coolant is abnormal, the general tips will be reported on the dashboard of the car. When the temperature of coolant is abnormal, parking should be checked to see if the coolant leaks. It should be noted that the hot car can not stop immediately, nor can it inject coolant immediately, but to wait until the engine temperature is normal before operation. If there are many coolants, we should check engine thermostat and fan radiator. The problem of engine overheating requires car drivers to grasp the basic knowledge and repair methods. The engine should be regularly maintained and inspected.

（三）消除发动机发生的特殊气味

(3) Elimination of special odors from engines

车辆在使用过程中，假如发现发动机舱有刺鼻的气味或烧焦味，应立即泊车，查看发动机周围是否有线路软化或被烧焦，对烧焦或短路的线路及时修正，避免更大的安全事故。扫除线路毛病之后仍存在难闻气味，应考虑是不是有附着在发动机外表的油液、异物受热蒸发或许焚烧之类的因素。

During the use of vehicles, if there is a pungent or burning smell in the engine compartment, parking should be immediately checked to see if there are any softening or burning lines around the engine, and the burning or short-circuit lines should be corrected in time to avoid greater safety accidents. After wiping out the line faults, there still exists bad odor. Consideration should be given to whether there are factors such as oil, foreign body heated evaporation or incineration attached to the engine surface.

（四）排气烟色反常毛病排查

(4) Investigation of abnormal exhaust smoke color

发动机起动运行就会有燃料焚烧，就会发生尾气排放，根据尾气的色彩是能够分辩动身动机部分毛病的。尾气呈黑色时，一般是因为混合器过浓，燃料不能被完全焚烧，这种状况要查看与进气相关的传感器。尾气色彩呈白色时，一般是因为燃油气化不良，没有焚烧便从排气管排出火花塞毛病和燃油质量不良的或许性较大。若尾气呈蓝色，则要解决烧机油问题，或许是火花塞或气门油封出现问题，应及时排查，必要时更换新件。

When the engine starts to run, there will be fuel burning and exhaust emission. According to the color of the exhaust, it can distinguish some faults of the starting engine. When the exhaust gas is black, it is usually because the mixer is too thick and the fuel can not be burned completely. This situation requires looking at the sensor associated with the intake. When the exhaust gas color is white, it is usually due to the poor gasification of fuel oil. Without incineration, spark plug defects and poor fuel quality may be discharged from the exhaust pipe. If the exhaust gas is blue, it is necessary to solve the problem of burning engine oil, perhaps spark plug or valve seal problems, should be timely checked, if necessary, replace new parts.

三、总结

Three, summary

把握常见的发动机毛病修理办法，能够下降行车安全隐患，同时做好定期保养保护，能够使发动机使用寿命更长。

Grasping the common repair methods of engine faults can reduce the hidden dangers of driving safety, while doing a good job of regular maintenance and protection, can make the engine service life longer.