With its CVO (Controlled Valve Operation) system solution for direct injection engines, Bosch has adopted a mechatronic approach that can make a valuable contribution to legal limits for emissions. Unlike conventional open-loop controlled injection, the control unit and high-pressure injectors constitute a closed loop in this setup. The control unit detects the triggering signal for the high-pressure injectors across the entire injection process and determines the timing for opening and closing the valve needles. Thus, the control unit can calculate the actual injection quantities of each injector and make adjustments where necessary. CVO offers an innovative and cost-effective approach to engine optimization.
BorgWarner Beru Systems
HFI is based on the phenomenon of corona discharge.
Precise ignition timing
Enabler for alternative combustion processes, such as HCCI
Enabler for reduced mixture enrichment under full load
Combustion diagnostics by flame front detection
Management of the ignition energy by intelligent electronic control
Long single spark duration and high ignition energy
The high-revving 4.5-liter V8 redesigned pistons increase the Speciale's compression ratio from 12.5:1 to 14.0:1. The efficiency increase it brings is the main reason the engine produces 596 hp, 34 more than the regular 458 Italia's, at the same 9000 rpm.
The shape has been optimized to improve the flame velocity
The pressure in the combustion chamber is increased (+10bar at wide open throttle)
Porsche LMP1 919 Hybrid engine
The motor-generator unit on the Porsche is driven by a separate turbine in the exhaust system.
Function test V4 race engine
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.