Perkins diesel engine overhead valve camshaft is an important engine component that controls the opening and closing of valves, thereby ensuring the normal operation of the engine. This article will introduce the structure, working principle, maintenance and maintenance of Perkins diesel engine overhead valve camshaft, and common troubleshooting.
1. The structure of the overhead valve camshaft of Perkins diesel engine.
Perkins diesel engine overhead valve camshafts are made of high-quality steel, and their structure mainly includes cams, cam journals, and valve tappets. Cams are used to control valve opening and closing, and their shape and size have a significant impact on engine performance and reliability; The cam journal is used to support the cam, and its surface is finished to ensure the accuracy of the fit with the cam; The valve tappet is used to convert the rotational motion of the cam into the linear motion of the valve, so as to realize the opening and closing of the valve.
Second, the working principle of the overhead valve camshaft of Perkins diesel engine.
Perkins diesel engine overhead valve camshafts work by controlling the opening and closing of valves by the rotation of the cams. When the cam rotates, the profile of the cam forces the valve to move up or down, opening or closing the valve. During engine operation, the speed of the camshaft is directly proportional to the speed of the engine, so the opening and closing time of the valve is also directly proportional to the speed of the engine.
3. Maintenance and maintenance of Perkins diesel engine overhead valve camshaft.
In order to ensure the proper operation of the overhead valve camshaft of Perkins diesel engines, regular maintenance and servicing are required. First of all, it is necessary to regularly check the lubrication of the camshaft to ensure that the lubrication is good; Secondly, the camshaft should be cleaned regularly to remove carbon deposits and other impurities; In addition, valve tappets and valves should be checked regularly for wear and tear and replaced if necessary. In the maintenance process, the following points also need to be noted:
1.Choose the right oil and fuel to reduce wear on the camshaft;
2.Avoid overloading the engine for a long time to prevent the camshaft from being overloaded;
3.When installing the camshaft, it is necessary to ensure that the installation position of each component is correct to avoid mechanical interference and friction;
4.When removing and installing the camshaft, use special tools and equipment to avoid damage to the camshaft.
Fourth, Perkins diesel engine overhead valve camshaft common troubleshooting.
Common faults of Perkins diesel engine overhead valve camshafts include: valve squeak, valve leakage, valve lag, etc. For these failures, the following measures can be taken to troubleshoot:
1.Adjust the valve clearance to ensure that the valve clearance is within the specified range;
2.Check whether the valve tappet is worn or damaged, and replace it in time if necessary;
3.Check whether the cam is worn or damaged, and replace it in time if necessary;
4.Check whether the valve spring is broken or the elastic force is insufficient, and replace it in time if necessary;
5.Wash the engine to remove carbon deposits and other impurities.
In conclusion, Perkins diesel engine overhead valve camshaft is an important part of the engine, and its maintenance and upkeep are of great significance to the performance and service life of the engine. In the actual use process, it is necessary to understand its structure and working principle, follow the correct use and maintenance methods, and eliminate faults in time to ensure the normal operation of the engine.