The transmission mode of the camshaft and how to adjust the axial clearance of the automobile camshaft?

The transmission mode of the camshaft and how to adjust the axial clearance of the automobile camshaft?
The following camshaft wholesale, camshaft manufacturers and camshaft brand companies will talk about the following two methods for adjusting the camshaft axial clearance:

(1) First, adjust the thickness of the thrust flange that is fixed on the front end face of the cylinder block and located between the end face of a journal of the camshaft and the timing gear or sprocket. During inspection, insert a feeler gauge between the thrust flange and the end face of the timing gear, and the measured gap should be about 0.1 0mrn.

(2) Another type of bearing positioning. For example, the axial limit of the camshaft of the automobile engine is completed by one and five bearing shoulders. If the axial clearance is greater than the application limit of 0.15mm, the camshaft with the shoulder should be replaced. bearing.

how to adjust the axial clearance of the automobile camshaft?
When the engine is working, the camshaft makes one revolution for every two revolutions of the crankshaft. The transmission modes from the crankshaft to the camshaft include gear transmission, chain transmission and toothed belt transmission. The following camshaft wholesale, camshaft manufacturers and camshaft brand companies talk about the transmission methods of camshafts?

1) Most of the valve trains with the lower and middle camshafts are driven by cylindrical timing gears. Generally, the transmission from the crankshaft to the camshaft only needs a pair of timing gears, and an intermediate gear can be added if necessary. In order to mesh smoothly and reduce noise, the timing gears mostly use helical teeth.

2) The timing accuracy of gear transmission is high, but it is not suitable for the overhead camshaft type valve train. The overhead camshaft must be driven by a timing chain or toothed belt. The chain-driven air distribution mechanism must be equipped with a chain guide plate and a tensioning device in order to ensure that the chain has a certain tension during operation and does not fall off the chain. Chain drives are not as reliable and durable as gear drives.