| The assembly is commonly mounted in the distributor or on the end of the crank or camshaft. |
| The electronic throttle inputs are sent to a stepper motor which controls an eccentric shaft positioned next to the intake camshaft. |
| By placing a cam phasing system on the camshaft, a pushrod engine can be tuned to take much higher levels of exhaust gas recirculation. |
| The mammoth engine's double overhead camshaft heads and 64 valves are fed by a quartet of turbochargers. |
| But unlike a living brain that controls heart rate and respiration, a conventional camshaft can't alter the valve events. |
| The 16-valve has twin, chain-driven, overhead camshafts and hydraulic tappets, while the 8-valve format uses a single camshaft. |
