Oil belt

Since the 1960s, the United States GM will be the first time the belt for the new roof standard cam (OHC) engine alternative use of the original ball chain, as a result of a synchronous belt, and noise, without lubrication, light weight , low cost and easy maintenance, and many other advantages, and rapidly when the car engine is the use of transmission, especially small engines, accounting for almost 100 per cent. But the new century, as modern car engine enhanced degree of constant improvement of stricter emissions regulations constantly, constantly extended maintenance cycle (240,000 km or 300,000 km), when the transmission is the continuously increasing load, with the precision of gas is there are increasingly high requirements, timing belt has been increasingly difficult to meet the modern car engine harsh demands, coupled with the improvement of technology are chain such as strength, wear resistance, noise reduction and optimization of design, a chain themselves to overcome the shortcomings highlighted Power transmission chain, the need to safeguard and heat resistance, oil resistance, and other inherent advantages, in recent years when the car engine is a transmission mechanism is inclined to use chain trend.