The 4-cylinder is a 16-valve DOHC design with Toyota’s VVT-i variable cam timing system, and is rated at 179 horsepower at 6000 rpm and 172 lb-ft of torque at 4000 rpm.
The valve lifter, a round cylinder, rides on the CAM.
气门挺杆为一圆筒体，坐落在凸轮上。
3
With the background of Gatling gun′s cam curve slot and main roller system, dynamics analysis of high speed inverse cylindercam mechanism was carried out.