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判斷和排除活塞敲缸故障需要注意什么?

來源:http://www.pxhecheng.com發布時間:2021-09-14 14:03:24

(1)判斷方法◆ 發動機怠速或低速運轉時異響比較清晰,中速以上運轉時,異響減弱或消失?!?負荷加大,響聲加大?!?一般冷車時響聲明顯,熱車后響聲減弱或消失,即冷敲缸,嚴重時冷熱均敲缸,并伴有振抖?!?將發動機置于異響明顯的轉速下,進行單缸斷火試驗,響聲明顯減弱或消失。
(1) Judgment method ◆ the abnormal noise is relatively clear when the engine is idling or running at low speed, and it weakens or disappears when running above medium speed. ◆ the load increases and the sound increases. ◆ generally, the sound is obvious when the car is cold, and the sound weakens or disappears after the car is hot, that is, the cylinder is knocked cold. In severe cases, the cylinder is knocked cold and hot, accompanied by vibration. ◆ place the engine at the speed with obvious abnormal sound, and conduct the single cylinder fire cut-off test, and the sound is obviously weakened or disappeared.
曲軸轉1圈,發響1次,且有節奏性,轉速提高時響聲加快?!?潤滑不良時響聲加重?!?將聽診器或聽診桿觸在機體上部兩側進行聽診。若響聲較強并稍有振動,再結合斷火試驗,即可確定出異響氣缸?!?伴隨現象:排氣管排藍煙、缸壓降低等。用手將螺絲刀或聽診器抵緊氣缸側部觸試,有明顯振動感。
The crankshaft makes a sound once after one revolution, and the sound is rhythmic. The sound speeds up when the speed increases. ◆ the sound becomes worse when the lubrication is poor. ◆ touch the stethoscope or stethoscope rod on both sides of the upper part of the body for auscultation. If the noise is strong and there is slight vibration, combined with the fire break test, the abnormal sound cylinder can be determined. ◆ accompanying phenomena: exhaust pipe exhausts blue smoke, cylinder pressure decreases, etc. Press the screwdriver or stethoscope against the side of the cylinder by hand, and there is obvious vibration.

濟南奧迪汽車專修
(2)原因和處理
(2) Causes and treatment
熱車敲缸的故障原因為連桿軸頸與主軸頸不平行、連桿襯套軸向偏斜等造成的活塞偏缸,活塞配合間隙過小、橢圓度過小或反橢圓、活塞變形等造成的活塞過緊,活塞環端隙、背隙過小造成的活塞環卡滯等。冷熱均敲缸的故障原因為活塞銷與連桿襯套或與連桿小頭裝配過緊,連桿軸承裝配過緊,活塞裙部圓柱度過大等,冷敲缸或熱敲缸較為嚴重時也會導致冷熱均敲缸。
The fault causes of hot car cylinder knocking are piston cylinder deviation caused by non parallelism between connecting rod journal and main journal, axial deflection of connecting rod bushing, too tight piston caused by too small piston fit clearance, too small ellipse or anti ellipse, piston deformation, etc., and stuck piston ring caused by too small piston ring end clearance and back clearance, etc. The fault causes of cold and hot uniform cylinder knocking are that the piston pin is too tight with the connecting rod bushing or with the small end of the connecting rod, the connecting rod bearing is too tight, the piston skirt cylinder is too large, etc. when the cold or hot cylinder knocking is more serious, it will also lead to cold and hot uniform cylinder knocking.
(3)主要損壞部件和處理方法
(3) Main damaged parts and treatment methods
按照故障產生主要部件,依次為:活塞及活塞環、連桿軸承瓦、連桿、活塞銷、氣缸套(氣缸壁)等。最佳處理方式:拆檢發動機,更換活塞、活塞環、活塞銷;更換連桿軸承,視情況更換維修曲軸(磨軸);視情況更換連桿;視情況維修氣缸(鏜缸)。
According to the fault, the main components are: piston and piston ring, connecting rod bearing bush, connecting rod, piston pin, cylinder liner (cylinder wall), etc. The best treatment method: dismantle and inspect the engine and replace the piston, piston ring and piston pin; Replace the connecting rod bearing, and replace and repair the crankshaft (grinding shaft) as appropriate; Replace the connecting rod as appropriate; Repair the cylinder (boring cylinder) as appropriate.
今天小編給大家呈現就是關于濟南奧迪汽車專修的相關知識,如果您對于本文有什么疑問及問題歡迎來電咨詢或者網站下邊留言:http://www.pxhecheng.com
Today's Xiaobian presents you the relevant knowledge about Audi in Jinan. If you have any questions and questions about this article, please call us or leave a message at the bottom of the website: http://www.pxhecheng.com

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