Tell us five wrong operation methods of diesel generator:

（1）冷啟動后未暖機就帶負荷運轉。

(1) After the cold start, the engine operates with load without warming up.

柴油機冷機啟動時，由于機油黏度大、流動性差，是機油泵供油不足，機器摩擦面因缺油潤滑不良，造成急劇磨損，甚至發生拉缸、燒瓦等故障。因此，柴油機冷卻啟動后應怠速運轉升溫，待機油溫度達到40℃以上時再帶負荷運轉；機器起步應掛低速擋，并循序每一擋位行駛一段里程，直到油溫正常、供油充分后，方可轉為正常行駛。

During the cold start of the diesel engine, due to the high viscosity and poor fluidity of the engine oil, the oil supply of the engine oil pump is insufficient, and the friction surface of the machine is poorly lubricated due to lack of oil, resulting in rapid wear, and even cylinder pulling, Bush burning and other failures. Therefore, after the diesel engine is cooled and started, it should run at idle speed to raise the temperature, and then run with load when the oil temperature reaches more than 40 ℃; When starting the machine, shift to the low gear and drive for a certain mileage in each gear in sequence until the oil temperature is normal and the oil supply is sufficient.

（2）柴油機機油不足時運轉。

(2) The diesel engine runs when the engine oil is insufficient.

此時會因機油供給不足而造成各摩擦副表面供油不足，導致異常磨損或燒傷。為此，機器起步前和柴油機運轉過程中要保證機油充足，防止由于缺油而引起拉缸、燒瓦故障。

At this time, insufficient oil supply on the friction pair surface will be caused due to insufficient oil supply, resulting in abnormal wear or burns. Therefore, before starting the machine and during the operation of the diesel engine, ensure that the engine oil is sufficient to prevent cylinder pulling and Bush burning due to lack of oil.

（3）帶負荷急停機或突然卸除負荷后立刻停機 。

(3) Emergency shutdown with load or immediate shutdown after sudden unloading of load.

柴油機熄火后冷卻系水的循環停止，散熱能力急劇降低，受熱件失去冷卻，易造成氣缸蓋、氣缸套、氣缸體等機件過熱，產生裂紋，或使活塞過度膨脹卡死缸套內。另一方面，柴油機停機時未經怠速降溫，會使摩擦面含油不足，當柴油機再次啟動時會因潤滑不良而加劇磨損。因此，柴油機熄火前應卸除負荷，并逐漸降低轉速、空載運轉幾分鐘。

After the diesel engine flameout, the circulation of cooling water stops, the heat dissipation capacity decreases sharply, and the heating parts lose cooling, which is easy to cause overheating of cylinder head, cylinder liner, cylinder block and other parts, resulting in cracks, or excessive expansion of piston and seizure in cylinder liner. On the other hand, if the diesel engine is shut down without idle cooling, the oil content on the friction surface will be insufficient, and the wear will be aggravated due to poor lubrication when the diesel engine is started again. Therefore, before the diesel engine stalls, the load shall be removed, the speed shall be gradually reduced and the engine shall run without load for several minutes.

（4）柴油機冷啟動后猛轟油門。

(4) The diesel engine slammed the throttle after cold start.

若猛轟油門，則柴油機轉速急劇升高，會造成機上的有些摩擦面因產生干摩擦而劇烈磨損。另外，轟油門時活塞、連桿和曲軸受理力變化大，引起劇烈撞擊，易損壞機件。

If the throttle is slammed, the speed of the diesel engine will increase sharply, which will cause severe wear of some friction surfaces on the engine due to dry friction. In addition, the force of piston, connecting rod and crankshaft changes greatly when the throttle is blown, causing severe impact and easy to damage the parts.

（5）冷卻水量不足或冷卻水、機油溫度過高的情況下運轉。

(5) It operates when the cooling water is insufficient or the temperature of cooling water and oil is too high.

柴油機冷卻水量不足會降低其冷卻效果，柴油機因得不到有效的冷卻而過熱；冷卻水、機油的油溫過高，也會引起柴油機過熱。此時氣缸蓋、氣缸套、活塞組件及氣門等主要受熱負荷大，其機械性能如強度、韌性等急劇下降，使零件變形增加，減小了零件間的配合間隙，加速機件磨損，嚴重時還會產生裂紋、機件卡住的故障。冷卻水、機油溫度過高會加快機油老化變質和燒損，且機油黏度下降，套缸和活塞及主要摩擦副的條件潤滑條件惡化，產生異常磨損。柴油機過熱還會惡化柴油機燃燒過程，使噴油器工作失常，霧化不良，積炭增多。

Insufficient cooling water of diesel engine will reduce its cooling effect, and the diesel engine will overheat due to lack of effective cooling; Too high oil temperature of cooling water and engine oil will also cause overheating of diesel engine. At this time, the main heating loads of cylinder head, cylinder sleeve, piston assembly and valve are large, and their mechanical properties such as strength and toughness are sharply reduced, which increases the deformation of parts, reduces the fit clearance between parts, accelerates the wear of parts, and even causes cracks and stuck parts in serious cases. Too high temperature of cooling water and engine oil will accelerate the aging, deterioration and burning of engine oil, reduce the viscosity of engine oil, deteriorate the lubrication conditions of casing, piston and main friction pairs, and cause abnormal wear. Overheating of the diesel engine will also worsen the combustion process of the diesel engine, resulting in abnormal operation of the fuel injector, poor atomization and increased carbon deposition.

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