With the increasing number of heavy-duty vehicles, the application of diesel engines is becoming increasingly widespread. However, due to the operator factors and other objective and human factors, the phenomenon of engine burner occurs. Light shaft burned, heavy crankshaft distortion, and even the occurrence of crushing tank accident, resulting in unnecessary economic losses. It is necessary to analyze the causes of the above phenomena and take precautions.

First, the characteristics of the original tile

The engine black smoke, the exhaust has a strong bang, so that suddenly turn off, then cut off the clutch, turning the crankshaft when the rotation or difficult to turn the phenomenon.

Second, the phenomenon of burning tile analysis

2, burning tile if used in the sudden, generally belong to the use of the problem. Generally for the following reasons:

(1) lack of oil, oil pump can not absorb oil;

(2) If the burning tile phenomenon occurs in the winter, there may be water in the oil icing, forced to start the engine to drive the shaft or broken gear drive gear teeth;

(3) oil replacement oil when the oil at the end of the oil plug did not tighten or forget to tighten the work, the oil plug is lost, so that all the oil suddenly missed; or exposed tubing and other parts of the contact, resulting in friction, , So that oil loss;

(4) oil contains impurities, or filters do not work, impurity scratched tiles. Especially aluminum-based bearing is more serious. Once the scraping off the metal scraps out of the oil, the extrusion after the adhesion on the tile, accumulated to a certain time, it will burn tile;

(5) Baotou North North heavy truck accessories cylinder head burst or due to the engine high temperature water ring leakage, so that cooling water into the oil;

(6) Baotou North North heavy truck accessories engine overload working time is too long, so that the viscosity of oil or deterioration;

(7) the driver does not pay attention to observe the oil pressure gauge or oil indicator, when the oil pressure is not found.

For the above reasons caused by the burner failure, preventive measures are:

(1) the use of lubricants according to maintenance procedures to select the appropriate model, and often check the oil level, such as oil should be added in time;

(2) lower temperature start and other parts of the friction when fully lubricated, and then make the engine high-speed operation;

(3) Baotou North Ben heavy truck accessories engine work should pay attention to observe the oil pressure gauge, if the oil pressure is low, should promptly troubleshooting;

(4) regular cleaning or replacement of oil filter filter to prevent containment of metal and other impurities in the oil into the main oil;

(5) normal work to do the three quarters: “ground observation, ground inspection, maintenance”.

2, the phenomenon of burning tile if the repair did not work before the occurrence, are the problem of repair methods. The reason is as follows:

(1) tiles installed anti, oil is blocked;

(2) oil cleaning is not clean, there are impurities;

(3) the main bearing seat crack;

(4) assembly, the bearing pad and journal contact area is small, even point contact;

(5) rough filter installation is not correct, can not afford to filter;

(6) the bending of the crankshaft and the main bearing hole concentricity check is not enough, even if the bearing pad with clearance are within the allowable range, and sometimes individual points not only without gaps and there may be relative extrusion, running the friction surface can not form Lubricating oil film.

For the reasons caused by the burning of the following precautionary measures can be taken:

(1) in the assembly process to be careful operation, pay attention to clear the oil channel, and the journal to achieve the required finish;

(2) maintenance cleaning filter, such as the discovery of scraping metal chips to identify the reasons, and timely cleaning and replacement;

(3) After assembly, the journal contact surface should reach more than 75% of the full area, and the crankshaft rotation flexibility, if a little contact, should be scraping;

(4) lubrication system maintenance should meet the technical requirements, after the start to observe the oil pressure is normal, according to the provisions of test run, after the trial operation must be replaced oil, and cleaning or replacement of oil filter filter;

(5) When installing the coarse filter, the sealing gasket must be pressed.

In addition, the poor quality of the tile itself and other reasons may also cause the engine burned tile, should be specific issues specific analysis, in the use and maintenance of attention to prevent the work can play a role.