The cam-within-a-cam consists of a solid intake camshaft within a hollow exhaust camshaft. The solid shaft has holes for cylindrical pins, located at five points that align with axial slots in the hollow outer shaft.
Camshaft-within-a-camshaft design (Mahle's CamInCam)
Assembled steel articulating camshaft to allow controlled phasing of the exhaust valve event.
Combining Atkinson cycle with turbocharging is nothing new. It is called the Miller cycle, or perhaps more correct, Miller system.
The V6 engine employs a race-inspired compact valve train and dry sump lubrication system to help lower the center of gravity.
2014 Acura NSX Concept
The electric compressor’s power is provide by the 48-V on-board system.
Enabling actuation of the electric compressor is linked to safety and energy-efficiency related conditions. Fault-free electric compressor hardware, including the 48-V vehicle electrical system, is essential for the electric compressor to be enabled.
With conventional wastegated turbochargers or fixed geometry turbochargers (FGT), a turbine flow area cannot be adjusted during operation.
Knocking is abnormal combustion in which the air-fuel mixture ignites prematurely due to exposure to high temperature and pressure, creating an unwanted high-frequency noise. When the compression ratio is increased, the temperature at compression top dead center (TDC) also rises, increasing the probability of knocking.