MAXUS G10 connecting rod.
The connecting rod group is composed of connecting rod body, connecting rod big head cover, connecting rod small head bushing, connecting rod big head bearing bushing and connecting rod bolt (or screw). The connecting rod group is subjected to the gas force from the piston pin, its own oscillation and the reciprocating inertia force of the piston group, the magnitude and direction of these forces are periodically changed. Therefore, the connecting rod is subjected to alternating loads such as compression and tension. The connecting rod must have sufficient fatigue strength and structural stiffness. Insufficient fatigue strength will often cause the connecting rod body or connecting rod bolt to break, and then produce a major accident of the whole machine damage. If the stiffness is insufficient, it will cause the bending deformation of the rod body and the circular deformation of the big head of the connecting rod, resulting in the partial wear of the piston, cylinder, bearing and crank pin.
The connecting rod body is composed of three parts, and the part connected with the piston pin is called the connecting rod small head; The part connected with the crankshaft is called the big head of the connecting rod, and the part connecting the small head and the big head is called the connecting rod body.
In order to reduce the wear between the small head and the piston pin, the thin-walled bronze bushing is pressed into the small head hole. Drill or mill grooves into the small heads and bushings to allow the splash of oil to enter the mating surface of the lubricating bushing-piston pin.
The connecting rod body is a long rod, and the force in the work is also large, in order to prevent its bending deformation, the rod body must have enough stiffness. For this reason, the connecting rod body of the vehicle engine mostly adopts the shape I section, which can minimize the mass under the condition that the stiffness and strength are sufficient, and the high-strength engine has the H-shaped section. Some engines use connecting rod small head injection oil cooling piston, which must be drilled through the longitudinal hole in the rod body. In order to avoid stress concentration, the connecting rod body, small head and big head are connected by a large circular smooth transition.
In order to reduce the vibration of the engine, the quality difference of the cylinder connecting rod must be limited to the minimum range, in the factory assembly of the engine, generally in grams as a unit of measurement according to the large and small mass of the connecting rod, the same engine to choose the same group of connecting rod.
On the V-type engine, the corresponding cylinders in the left and right columns share a crank pin, and the connecting rod has three types: parallel connecting rod, fork connecting rod and main and auxiliary connecting rod.
A broken connecting rod in a car can cause a variety of effects, including but not limited to:
decreased driving stability : connecting rod damage will lead to the decline of the driving stability of the car, there may be abnormal vibration, noise and other problems, in serious cases may lead to vehicle out of control, increase the risk of traffic accidents.
power loss : connecting rod is an important part of the engine, if the connecting rod is damaged, the engine will not be able to generate power, resulting in the vehicle can not run normally.
Mechanical damage : A broken connecting rod can cause the piston to strike the cylinder wall, causing serious mechanical damage and possibly even the entire engine being scrapped and requiring a new engine.
four-wheel positioning misalignment : damage to the small connecting rod of the vehicle balance rod will lead to four-wheel positioning misalignment, affecting the stability and safety of the vehicle, and it is necessary to re-adjust the four-wheel positioning.
uneven tire wear : Damage to the balance rod or stabilizer rod connecting rod will lead to uneven tire wear, shorten tire life and increase maintenance costs.
suspension damage : Damage to the connecting rod may cause additional impact on the vehicle's suspension system, resulting in increased wear and tear on the suspension parts, or even damage.
increases accident risk : connecting rod damage will reduce the handling and comfort of the vehicle, increase the risk of accidents, especially at high speeds, the poor stability of the vehicle may lead to serious traffic accidents.
Noise and abnormal vibration : Rod damage may cause abnormal noise and vibration during the running of the vehicle, affecting the driving experience and vehicle performance.
maintenance cost : The maintenance cost of connecting rod damage is high, and it may be necessary to replace the damaged connecting rod or the whole engine, which increases the economic burden of the owner.
safety risk : connecting rod damage will directly affect the safety performance of the vehicle, may lead to the vehicle in the process of running out of control, deviation and other problems, increase the risk of traffic accidents.
To sum up, the damage of the automobile connecting rod has a significant impact on the performance and safety of the vehicle, and it needs to be diagnosed and repaired in time.
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