What is DOHC?
2 Answers
DOHC is a type of automobile engine. Generally, a DOHC engine has higher torque and power compared to a regular engine. The most significant feature is that it is a TWIN-CAM, which typically delivers about 15% more horsepower than a standard engine. The pistons in a DOHC engine are also different from those in a regular engine, as they need to be more robust to maintain normal engine operation. Additional details are as follows: 1. DOHC: As the name suggests, it stands for Double Overhead Camshaft. From the working principle of an engine, it is understood that a complete cycle includes intake, compression, combustion, and exhaust. To achieve intake and exhaust, the cylinder requires intake and exhaust valves, and the camshaft's role is to mechanically coordinate the opening and closing actions of these valves. 2. SOHC: Refers to a setup where a single camshaft controls the opening and closing of both intake and exhaust valves, whereas DOHC uses two separate camshafts to control the intake and exhaust valves independently. The advantage of DOHC is that it allows easy adjustment of the valve timing, enabling the engine to deliver ample torque at low RPMs and maximum horsepower at high RPMs. Typically, high-performance, large-displacement engines often use DOHC. DOHC does not increase fuel consumption; instead, it allows the engine to perform more efficiently.
DOHC stands for Double Overhead Camshaft, which is a common engine design. I often come across this technology when playing racing games. It features two camshafts, one dedicated to controlling the intake valves and the other managing the exhaust valves, allowing for more precise valve timing compared to older single camshaft engines that required components like rocker arms. This design enables the engine to run more smoothly at high RPMs, increases power output, and also helps improve fuel efficiency due to more complete combustion. My own car uses DOHC, and it feels incredibly smooth when driving, with much quicker throttle response. In terms of maintenance, DOHC can be slightly more demanding—for example, the timing chain needs regular checks—but overall reliability is good; I’ve driven mine for five years without major issues. If you’re looking to buy a new car, check if the engine model includes this abbreviation, as it delivers a more enjoyable driving experience.
