在實際使用過程中，有錯誤的認識：柴油發電機的冷卻液溫度越低越好。其實，我們對柴油機冷卻液溫度的使用有明確的要求的。有些操作員喜歡將冷卻液溫度調節得很低。有的接近冷卻液溫度下限，有的低于冷卻液溫度下限。他們認為，如果冷卻液溫度低，水泵就不會出現氣穴，冷卻液就不會中斷，而且在使用中有安全系數。實際上，只要冷卻液溫度不超過95℃,不會出現氣穴，冷卻液也不會中斷。反之，如果冷卻液溫度過低，對柴油機的危害很大。
In actual use, there is a wrong understanding?that the lower the coolant temperature of diesel generators, the better.In fact, we have clear requirements for the use of diesel engine coolant temperature. Some operators like to adjust the coolant temperature very low. Some are close to the lower limit of coolant temperature?orlower than the limit of coolant temperature.They believe that if the coolant temperature is low, the water pump will not have cavitation, the coolant will not be interrupted, and there is a safety factor in use. In fact, as long as the coolant temperature does not exceed 95°C, no air pockets will appear and the coolant will not be interrupted. On the contrary, if the coolant temperature is too low, it will be very harmful to the engine.
1.隨著潤滑系統中機油粘度的增加，零件的運轉阻力增大，導致潤滑不良，零件間磨損加劇。例如，當冷卻液溫度為30℃,與冷卻液溫度80～90℃相比℃,缸套、活塞和活塞環的磨損將增加約5倍。
As the viscosity of the oil in the lubrication system increases, the running resistance of the parts increases,resulting in poor lubrication and increased wear between parts. For example, when the coolant temperature is 30°C, compared with the coolant temperature of 80 to 90°C, the wear of the cylinder liner, piston and piston ring will increase about 5 times.
2.冷卻液溫度低、柴油機缸內燃燒狀況惡化、燃油霧化不良、后燃期延長、柴油機運轉粗暴等，加劇了曲軸承、活塞環等零件的損壞，降低動力性和經濟性。
Low coolant temperature?could?worse?the ?combustion conditions in diesel engine cylinders, poor fuel atomization, prolonged afterburn period?andrough diesel engine operation.Which will increase the damage of curved bearings, piston rings and other parts, reducing power and economy.
3.燃燒后的水蒸氣容易在氣缸壁上凝結，造成金屬腐蝕。
The burned water vapor is easy to condense on the cylinder wall, causing metal corrosion.
4.未燃燒的柴油會稀釋機油，導致潤滑效果不好。
Unburned diesel will dilute the oil and cause poor lubrication.
5.燃油不完全燃燒會形成膠質，使活塞環卡在活塞環槽內，氣門卡死，壓縮結束時缸內壓力降低。
Incomplete combustion of fuel will form gums, which will cause the piston ring to get stuck in the piston ring groove, and the valve will get stuck.When the compression ends, the pressure in the cylinder will decrease.