About single overhead camshaft?

Simply put, the single camshaft has simple mechanical structure, easy maintenance and low probability of problems; Moreover, the low-speed torque is large, which is relatively suitable for low-speed driving (urban areas) and has advantages in fuel consumption;

Double camshaft has high horsepower, but the torque at low speed is not as good as sohc, which is suitable for high-speed driving (expressway), and the maintenance cost is also high because of the complicated machinery; Dual camshafts generally match high-speed engines, because only high-speed engines need to use dual camshafts.

To sum up, there is no absolute good or bad, but the structure is different, and it should be assembled according to the characteristics of the engine; SOHC has advantages in torsion and fuel consumption, so it is more suitable for urban driving, and DOHC has advantages in horsepower, so it is more suitable for high-speed driving. The explosive force and torque output of sohc are better than that of dohc at low speed, that is, the engine efficiency is higher than that of DOHC.

This also explains why the Accord 8 2.0, which focuses on affordable household brands, uses a single camshaft, while the 2.4, which pursues greater horsepower and better performance, uses a double camshaft; It's not that 2.0 can't use double camshafts, but it's unnecessary, just like eating without gold chopsticks, because users who buy 2.0 pay more attention to fuel economy and use it more often in cities.