The cylinder head carries the valves, valve springs and the rockers on the rocker shaft, this part of the valve gear being worked by push-rods.

缸盖上装有气门、气门弹簧和摇臂轴上的摇臂，推杆推动这部分气门传动机构工作。

youdao

It's an overhead valve engine with a single camshaft that uses push rods to open and close the 16 valves.

FORBES: The Engine That Could

As is usual in a wide variety of racing vehicles, horizontal damper struts are now used, which are operated via separate push rods and transfer levers.

ENGADGET: Visualized: Mercedes-Benz SLS AMG E-Cell bares all