论文部分内容阅读
90年代中期,丰田汽车公司成功地研制出新一代VVT-i智能正时可变气门控制系统。 该系统可根据不同的驾驶情况,调节进气凸轮轴的位置,从而控制进气门的正时调整(timing),令发动机在转速上得到最理想的配合。另外,该系统还可根据不同车速作出预先编程,为进气门的正时调整提供更精确的控制,达到更高马力和扭矩输出。同时,新式VVT-i燃耗更低,排出的氧化氮和碳氢化合物更少,但扭矩和功率输出却得到增强。 VVT-i新式发动机与一般汽油发
In the mid-90s, Toyota Motor Corporation successfully developed a new generation of VVT-i intelligent timing variable valve control system. The system can adjust the position of the intake camshaft according to different driving conditions to control the timing adjustment of the intake valve so that the engine can be optimally matched in rotation speed. In addition, the system can be pre-programmed according to different speed to provide more precise timing control of the intake valve, to achieve higher horsepower and torque output. At the same time, the new VVT-i consumes less fuel and delivers less nitrogen and hydrocarbons, but with increased torque and power output. VVT-i new engine and general gasoline hair