通过排气凸轮轴上的电子气门升程切换系统以及进气和排气凸轮轴上的可变气门正时,实现对每个气缸气体交换的优化控制。较小的凸轮轮廓仅用于低转速,此功能有以下好处:
① 优化气体交换;
② 防止废气回流到之前的180°排气缸;
③ 入口打开时间更早,填充程度更佳;
④ 通过燃烧室内的正压差减少余气;
⑤ 提升响应性;
⑥ 在较低转速和较高增压压力下达到更高的转矩。
Through the electronic valve lift switching system on the exhaust camshaft and the variable valve timing on the intake and exhaust camshafts, the optimal control of gas exchange of each cylinder is realized. The smaller cam profile is only used for low speeds, and this feature has the following benefits:
① Optimize gas exchange;
② Prevent the exhaust gas from flowing back to the previous 180 ° exhaust cylinder;
③ The inlet opening time is earlier and the filling degree is better;
④ The residual gas is reduced by the positive pressure difference in the combustion chamber;
⑤ Improve responsiveness;
⑥ Higher torque at lower speed and higher boost pressure.
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