超過 10 分鐘的長時間低怠速或空載會損壞發(fā)動機。因為燃燒室溫度太低以致于燃油不能完全燃燒。這將引起在噴油器噴孔以及活塞環(huán)周圍形成積炭并引起氣門粘連。如果發(fā)動機冷卻液溫度低于 60°C ，未燃燒的燃油將會沖刷掉氣缸壁上的潤滑油，并使曲軸箱的潤滑油稀釋。燃油的稀釋物會影響潤滑油的品質(zhì)，并縮短發(fā)動機壽命，盡量縮短怠速時間以防止這種情況發(fā)生。

Prolonged low idle or no-load for more than 10 minutes will damage the engine. Because the temperature of the combustion chamber is too low, the fuel cannot burn completely. This will cause carbon deposits around the injector orifice and piston ring and cause valve adhesion. If the engine coolant temperature is lower than 60 ° C, the unburned fuel will wash away the lubricating oil on the cylinder wall and dilute the lubricating oil in the crankcase. The dilution of fuel will affect the quality of lubricating oil and shorten the service life of the engine. Try to shorten the idle time to prevent this from happening.

柴油發(fā)電機組在小負荷下運行，隨著運行時間的延續(xù)，會出現(xiàn)以下五大危害!

The diesel generator set operates under small load. With the continuation of operation time, the following five hazards will appear!

（一）活塞—汽缸套密封不好，機油上竄，進入燃燒室燃燒，排氣冒藍煙；

（1） The sealing of piston cylinder liner is not good, the oil runs up, enters the combustion chamber for combustion, and the exhaust emits blue smoke;

（二）對于增壓式柴油機，由于低載、空載，增壓壓力低。容易導致增壓器油封（非接觸式）的密封效果下降，機油竄入增壓室，隨同進氣進入汽缸；

（2） For supercharged diesel engine, the supercharging pressure is low due to low load and no-load. It is easy to cause the sealing effect of supercharger oil seal (non-contact type) to decline, and the oil rushes into the supercharging chamber and enters the cylinder with the intake air;

（三）上竄至汽缸的一部分機油參與燃燒，一部分機油不能完全燃燒，在氣門、進氣道、活塞頂、活塞環(huán)等處形成積炭，還有一部分則隨排氣排出。這樣，汽缸套排氣道內(nèi)就會逐步積聚機油，也會形成積炭；

（3） Part of the engine oil flowing up to the cylinder is involved in combustion, part of the engine oil can not be completely burned, and carbon deposits are formed at the valves, inlet ports, piston crown, piston rings, etc., and some are discharged with the exhaust. In this way, engine oil will gradually accumulate in the exhaust passage of cylinder liner, and carbon will also be formed;

（四）增壓器的增壓室內(nèi)機油積聚到一定程度，就會從增壓器的結(jié)合面處滲漏出；

（4） When the oil in the supercharging chamber of the supercharger accumulates to a certain extent, it will leak from the joint surface of the supercharger;

（五）長期小負荷運行，將會更嚴重的導致運動部件磨損加劇，發(fā)動機燃燒環(huán)境惡化等導致大修期提前的后果。因此，國外柴油機制造廠商無論對自然吸氣型還是增壓機型的使用都強調(diào)應盡量減少低載/空載運行時間，并規(guī)定Z小負荷不能低于機組額定功率的25%—30%。

（5） Long term low load operation will lead to more serious consequences such as increased wear of moving parts and deterioration of engine combustion environment, leading to the advance of overhaul period. Therefore, foreign diesel engine manufacturers emphasize to minimize the low load / no-load operation time regardless of the use of naturally aspirated or supercharged models, and stipulate that the Z small load shall not be less than 25% - 30% of the rated power of the unit.

柴油發(fā)電機組長時間滿載運行，不但可以提高本身性能，找出隱患，還可以避免重大的通信事故。

The long-time full load operation of diesel generator can not only improve its performance and find out hidden dangers, but also avoid major communication accidents.

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