Brand New Forged Steel OM501 Engine Camshaft A5410511301 For Benz Diesel Engine Spare Part

A camshaft is a component in a piston engine. Its function is to control the opening and closing of the valve.
The body of the camshaft is a cylindrical rod approximately the same length as the cylinder bank. There are several cams on it, which are used to drive the valves. The camshaft is supported in the camshaft bearing hole through the camshaft journal, so the number of camshaft journals is an important factor affecting the rigidity of the camshaft support. If the rigidity of the camshaft is insufficient, it will bend and deform during operation, which will affect the timing of gas distribution.
The sides of the cam are egg-shaped. The purpose of its design is to ensure sufficient intake and exhaust of the cylinder. In addition, considering the durability of the engine and the smoothness of operation, the valve should not have too much impact due to the acceleration and deceleration process during the opening and closing actions, otherwise, it will cause serious valve wear, increased noise or other serious consequences. Therefore, there is a direct relationship between the cam and the engine's power, torque output, and smoothness of operation.

In simple terms, a camshaft is a metal rod with multiple disc-shaped cams. What role does this metal rod play in the engine work? It is mainly responsible for the opening and closing of intake and exhaust valves. Driven by the crankshaft, the camshaft rotates continuously, and the cam continuously presses down the valve (rocker arm or ejector rod), thereby realizing the function of controlling the opening and closing of the intake and exhaust valves.

A camshaft is a component in a piston engine. Its function is to control the opening and closing of the valve. Although the speed of the camshaft in a four-stroke engine is half that of the crankshaft (in a two-stroke engine, the speed of the camshaft is the same as that of the crankshaft), but usually its speed is still very high, and it needs to withstand a lot of torque, so the design of The camshaft has high requirements in terms of strength and support, and its material is generally special cast iron, and occasionally forgings are used. Since the law of valve motion is related to the power and running characteristics of an engine, the design of the camshaft occupies a very important position in the design process of the engine.

A camshaft is a component in a piston engine. Its function is to control the opening and closing of the valve. Although the speed of the camshaft in a four-stroke engine is half the speed of the crankshaft (in a two-stroke engine, the speed of the camshaft is the same as that of the crankshaft), but usually its speed is still very high, and it needs to bear a lot of torque, so the design of The camshaft has high requirements in terms of strength and support, and its material is generally high-quality alloy steel or alloy steel. Since the law of valve motion is related to the power and running characteristics of an engine, the design of the camshaft occupies a very important position in the design process of the engine.
Fault:
Common failures of camshafts include abnormal wear, abnormal noise, and fracture. Abnormal wear and tear symptoms often appear before abnormal noise and fracture occur.
(1) The camshaft is almost at the end of the engine lubrication system, so the lubrication condition is not optimistic. If the oil supply pressure of the oil pump is insufficient due to the long-term use, or the lubricating oil passage is blocked so that the lubricating oil cannot reach the camshaft, or the tightening torque of the bearing cap fastening bolts is too large, the lubricating oil cannot enter the camshaft clearance, and the Causes abnormal wear of the camshaft.
(2) Abnormal wear of the camshaft will cause the gap between the camshaft and the bearing seat to increase, and axial displacement will occur when the camshaft moves, resulting in abnormal noise. Abnormal wear will also cause the gap between the drive cam and the hydraulic lifter to increase, and the cam will collide with the hydraulic lifter when combined, resulting in abnormal noise.
(3) Serious failures such as breakage of the camshaft sometimes occur. Common causes include cracked hydraulic tappets or severe wear, severe poor lubrication, poor camshaft quality, and cracked camshaft timing gears.
(4) In some cases, the failure of the camshaft is caused by human reasons, especially when the engine is repaired, the camshaft is not properly disassembled and assembled. For example, when removing the camshaft bearing cover, use a hammer to knock it down or pry it with a screwdriver, or install the bearing cover in the wrong position, causing the bearing cover to not match the bearing seat, or the tightening torque of the bearing cover fastening bolts is too large. When installing the bearing cover, pay attention to the direction arrows and position numbers on the surface of the bearing cover, and use the torque wrench to tighten the bearing cover fastening bolts in strict accordance with the specified torque.
Production technology:
The camshaft is one of the key parts of the engine. The hardness of the camshaft peach and the depth of the white layer are the key technical indicators that determine the service life of the camshaft and the efficiency of the engine. On the premise of ensuring that the cam has a high enough hardness and a fairly deep white layer, it should also be considered that the journal does not have high carbides, so that it has better machining performance.

A camshaft is a component in a piston engine. Its function is to control the opening and closing of the valve. Although the speed of the camshaft in a four-stroke engine is half the speed of the crankshaft (in a two-stroke engine, the speed of the camshaft is the same as that of the crankshaft), but usually its speed is still very high, and it needs to bear a lot of torque, so the design of Camshafts are demanding in terms of strength and support. The material is generally high-quality alloy steel or alloy steel. Since the law of valve motion is related to the power and running characteristics of an engine, the design of the camshaft occupies a very important position in the design process of the engine. The camshaft is also called the peach shaft or the eccentric shaft because its cross-sectional shape is similar to that of a peach. The camshaft structure of various models of engines is similar, the main difference lies in the installation position, the number and shape and size of the cams are also different. The cam installation position of the engine is divided into three forms: lower, middle and overhead. Due to the fast speed of the car engine, the speed can reach more than 5,000 rpm. If the under-mounted or mid-mounted camshaft is used, due to the long distance between the valve and the camshaft, auxiliary parts such as valve push rods and tappets are required, causing the valve There are many transmission parts, the structure is complex, the engine volume is large, and it is easy to generate noise under high-speed operation, and the use of overhead camshafts can change this phenomenon. Modern car engines generally use overhead camshafts, which are arranged above the engine, shortening the distance between the camshaft and the valve, omitting the push rod and tappet of the valve, and simplifying the camshaft to the valve. The transmission mechanism makes the structure of the engine more compact. More importantly, this installation method can reduce the mass of the reciprocating motion of the entire system and improve the transmission efficiency.