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叉车在使用过程中，出现排气冒黑烟是柴油未充分燃烧，排气冒黑烟，不但降低了发动机功率，增加了柴油消耗量，且易形成积炭，缩短发动机使用寿命。这是什么原因造成的呢？下面济南叉车租赁厂家为您讲解。

During the use of the forklift, black smoke from the exhaust is caused by incomplete combustion of diesel oil, which not only reduces the engine power, increases diesel consumption, but also easily forms carbon deposits and shortens the service life of the engine. What causes this? Next, Jinan forklift rental manufacturer will explain to you.

1、气缸内新鲜空气不足原因：

1. Reasons for insufficient fresh air in the cylinder:

(1)空气滤清器滤芯积尘过多；

(1) Excessive dust accumulation on the air filter element;

(2)消声器锈蚀、积炭或油污。

(2) The muffler is rusted, carbon deposited or greasy.

(3)进、排气门间隙过大，使气门开度减小；

(3) The clearance between inlet and exhaust valves is too large, which reduces the valve opening;

(4)配器机构零件松动、磨损、变形，凸轮轴齿轮与曲轴正时齿轮相对位置变化，气门开闭时间不正确。

(4) The parts of the adapter mechanism are loose, worn and deformed, the relative position of the camshaft gear and the crankshaft timing gear changes, and the valve opening and closing time is incorrect.

2、气缸压缩终了时温度和压力下降原因：

2. Reasons for temperature and pressure drop at the end of cylinder compression:

(1)缸筒、活塞环磨损过多，活塞环安装不正确或失去弹性造成气缸漏气；

(1) Excessive wear of cylinder barrel and piston ring, incorrect installation or loss of elasticity of piston ring cause air leakage of cylinder;

(2)气门间隙过小，热车时易被顶开，或气门烧蚀、积炭造成气缸密封不严；

(2) The valve clearance is too small, and it is easy to be pushed open when the car is hot, or the valve is burned and carbon deposits, resulting in poor cylinder sealing;

(3)缸盖与机体，喷油器与缸盖接合面漏气；

(3) Air leakage occurs at the interface between cylinder head and engine body, injector and cylinder head;

(4)气门严重下陷，活塞与活塞销，活塞销与连杆小头，连杆大头与连杆轴颈间隙过大，使燃烧室容积增大，压缩比下降。

(4) The valve is seriously depressed, and the clearance between piston and piston pin, piston pin and connecting rod small end, connecting rod big end and connecting rod journal is too large, which increases the combustion chamber volume and decreases the compression ratio.

3、柴油雾化不良原因：

3. Reasons for poor diesel atomization:

(1)喷油器压力调整过低；

(1) Fuel injector pressure adjustment is too low;

(2)喷油器调压弹簧折断或发卡；

(2) The pressure regulating spring of the fuel injector is broken or jammed;

(3)喷油器针阀与阀座积炭，针阀卡滞或磨损过甚；

(3) The needle valve and valve seat of the fuel injector have carbon deposits, and the needle valve is stuck or excessively worn;

(4)喷油泵出油阀减压环带磨损过甚，使喷油器滴油。

(4) The pressure reducing ring of the fuel injection pump outlet valve is excessively worn, causing the fuel injector to drip.

4、供油时间及供油量不正确原因是：

4. The reasons for incorrect fuel supply time and quantity are:

(1)供油时间过迟；

(1) The fuel supply time is too late;

(2)起动初期，气体压力和温度较低，供油时间过早时；

(2) At the beginning of starting, the gas pressure and temperature are low, and the oil supply time is too early;

(3)喷油泵柱塞偶件磨损后加大供油行程使用；

(3) Increase the fuel supply stroke after the wear of the plunger couple of the fuel injection pump;

(4)喷油泵调节齿杆或拉杆行程过大，以致供油量过多。

(4) The stroke of the regulating gear rod or pull rod of the fuel injection pump is too large, resulting in excessive fuel supply.

叉车使用期间排气冒黑烟的原因讲解就到这里了，您对此有什么想法吗？可以随时来我们网站http://www.jnhgjx.net进行咨询，有关人员为您竭诚服务！

This is the end of the explanation of the reasons for the black smoke from the exhaust during the use of the forklift. Do you have any ideas about this? You can come to our website anytime http://www.jnhgjx.net For consultation, relevant personnel will serve you wholeheartedly!