Automatic feeding mixer in the process of driving will appear piston knock cylinder abnormal sound, below for you to explain the automatic feeding mixer this situation judgment, and processing method.

產(chǎn)生活塞敲缸的主要原因有以下幾個(gè)方面：活塞同氣缸壁的間隙太大。WD615系列發(fā)動(dòng)機(jī)活塞裙部和氣缸的標(biāo)準(zhǔn)間隙為0.143-0.182，磨損極限為0.35—0.40。發(fā)動(dòng)機(jī)運(yùn)行一段時(shí)間后，氣缸活塞產(chǎn)生磨損，加之潤滑不好，活塞和氣缸的配合間隙由于磨損而增大，并在道氣環(huán)略下處出現(xiàn)較嚴(yán)重的臺階，使活塞敲擊氣缸發(fā)出異響。

The main reasons for piston knock are as follows: the clearance between piston and cylinder wall is too large. The standard clearance between piston skirt and cylinder of WD615 Series engine is 0.143-0.182, and the wear limit is 0.35-0.40. After the engine runs for a period of time, the piston of the cylinder is worn, and the lubrication is not good. The clearance between the piston and the cylinder increases due to the wear, and a serious step appears at the lower part of the gas ring, which makes the piston strike the cylinder and make an abnormal noise.

活塞裙部和氣缸在運(yùn)行一段時(shí)間以后，磨損嚴(yán)重，造成嚴(yán)重失圓而敲缸。個(gè)別連桿由于種種原因產(chǎn)生變形，造成活塞偏磨，間隙變大而敲缸?；钊酶讜?huì)導(dǎo)致發(fā)動(dòng)機(jī)燃油消耗過高、發(fā)動(dòng)機(jī)竄機(jī)油、機(jī)油耗量多、經(jīng)濟(jì)性差。當(dāng)活塞敲缸嚴(yán)重時(shí)，還會(huì)拉碎活塞，打壞氣缸，以致于連桿斷裂，打壞氣缸體。

After running for a period of time, the piston skirt and cylinder are worn seriously, resulting in serious out of round and knocking cylinder. Some connecting rods are deformed due to various reasons, resulting in eccentric wear of piston, larger clearance and cylinder knock. Piston knock will lead to high fuel consumption, engine oil channeling, high oil consumption and poor economy. When the piston knocks the cylinder seriously, it will also break the piston and damage the cylinder, resulting in the fracture of the connecting rod and the damage of the cylinder block.

活塞敲缸的判斷方法：

The judgment method of piston knock is as follows

(1)逐缸斷油：采取逐缸斷油的方法來確定敲缸的位置，如果斷油某缸時(shí)，聲音明顯的減小或者消失，而當(dāng)恢復(fù)供油時(shí)能聽到明顯的“嗒嗒”聲，自動(dòng)上料攪拌車，說明該缸活塞敲缸。

(1) Cylinder by cylinder oil cut-off: the method of cylinder by cylinder oil cut-off is adopted to determine the knock position. If the oil cut-off reaches a certain cylinder, the sound obviously decreases or disappears, and when the oil supply is restored, the obvious "click" sound can be heard. The automatic feeding mixer indicates that the piston of the cylinder knocks.

(2)為了進(jìn)一步證實(shí)該缸活塞敲缸，可以將該缸的噴油器卸下來，向氣缸內(nèi)加入少量的CD級中增壓機(jī)油(起密封作用)，再裝好噴油器，自動(dòng)上料攪拌車一臺，發(fā)動(dòng)發(fā)動(dòng)機(jī)，敲擊聲消失或者減弱，運(yùn)行一會(huì)敲擊聲再度出現(xiàn)，則是該缸活塞敲缸無疑

(2) In order to further confirm the knock of the piston in the cylinder, the fuel injector of the cylinder can be removed, a small amount of CD grade medium supercharging oil can be added into the cylinder (which plays a sealing role), and then the fuel injector can be installed. How much is an automatic feeding mixer? When the engine is started, the knock disappears or weakens, and the knock appears again after running for a while