Final answer:
There is not enough specific information to determine the exact type of valve-camshaft arrangement, but the description involves the exhaust process of a diesel engine cycle, indicating an overhead camshaft operating the exhaust valve.
Step-by-step explanation:
The type of valve-camshaft arrangement described in the question is part of the working cycle of an internal combustion engine, specifically a diesel engine cycle. The information provided does not directly describe a valve-camshaft arrangement but outlines steps of the diesel cycle, including the intake of air (intake stroke), compression of air (compression stroke), combustion (power stroke), and exhaust (exhaust stroke). The exhaust process is broken down into constant-volume exhaust, where the exhaust valve opens but the piston does not move, maintaining constant volume, and isobaric compression, where the piston compresses the chamber to zero volume to expel the remaining exhaust gases. This suggests the presence of an overhead camshaft that operates the exhaust valve during the cycle.