What does a D-VVT engine mean?
2 Answers
It refers to an engine that adopts variable valve timing technology for both intake and exhaust valves. Below are detailed introductions about it: 1. Introduction one: Engines utilizing DVVT technology are more efficient, energy-saving, and environmentally friendly compared to those currently widely adopting intake valve timing technology in the market. 2. Introduction two: DVVT technology can reduce fuel consumption by 5%, while increasing power by 10%, achieving the power indicators equivalent to a 2.0 displacement engine. The exhaust emissions meet the National IV standard. By controlling the air-fuel mixture in the engine combustion chamber to achieve the optimal air-fuel ratio, it can also significantly improve idle stability, thereby obtaining better comfort.
D-VVT stands for Dual Variable Valve Timing technology, which essentially means the engine can intelligently adjust the opening and closing timing of the intake and exhaust valves. Having driven a car equipped with this technology, the most noticeable difference is the crisp responsiveness during acceleration from standstill—no more sluggishness like older engines—and more confident power delivery at highway speeds. This system uses oil pressure to control camshaft phasing: it advances intake valve opening at low speeds to increase torque, and delays exhaust valve closing at high speeds to boost power output. In real-world usage, it delivers tangible fuel savings—I save about half a liter per 100km on my suburban commute. Modern vehicles from brands like Toyota and Hyundai widely adopt this system, offering broader adjustment range than single VVT systems. However, regular oil changes are crucial as sludge buildup can impair the responsiveness of the variable valve actuators.
