What is the reason for Wuling canceling DVVT?
2 Answers
Wuling canceled DVVT possibly due to cost considerations or to comply with the latest environmental regulations. For naturally aspirated engines, variable valve timing and variable valve lift technologies play a significant role. However, for turbocharged engines, the impact of these technologies is not as substantial. Additional information: 1. DVVT stands for Dual-Variable-Valve-Timing, which refers to the technology that allows variable timing for both intake and exhaust valves. This technology can reduce valve lift during engine idling to control the amount of air intake, while increasing valve lift during high-speed operation to enhance air intake. This enables the engine to deliver strong power at high RPMs and sufficient torque at low RPMs, thereby improving engine performance. 2. The variable valve drive mechanism can adjust the valve timing, lift, and duration of valve opening based on the vehicle's operating conditions. The application of this technology can effectively reduce fuel consumption, enhance power output, and ensure that exhaust emissions meet national standards.
I estimate that Wuling canceled DVVT mainly from a commercial perspective. DVVT technology allows the engine to breathe more smoothly and save fuel, but it also significantly increases the cost of each engine, especially with the dual camshaft and hydraulic actuator solution. Wuling focuses on low-cost, practical models, and its users are budget-conscious small business owners who care more about staying within budget than minor differences in fuel consumption. Moreover, after canceling DVVT, maintenance becomes simpler, and common issues can be fixed at roadside repair shops, saving owners the hassle of visiting 4S stores. Now, they use optimized intake and exhaust manifold designs to partially compensate for the effect. Although the peak performance is slightly worse, it’s sufficient for daily hauling and transportation needs.
