The intelligent thermal management system in the Cayman models regulates the temperature in the engine and gearbox to reduce friction losses that occur during the warm-up phase.
Thanks to the purposeful control of heat flow and on-demand, gradual activation of the various cooling circuits, the engine and gearbox warm up to normal operating temperature more rapidly. The resulting reduction in friction also reduces fuel consumption and CO2 emissions. During sporty driving, thermal management also acts to reduce temperatures so as to maintain a high degree of performance.
Our cross-flow cooling system, as used in motorsport, supplies each engine cylinder uniformly with coolant, which protects all valves against thermal overload and, therefore, premature wear. This improves combustion and keeps emissions, fuel consumption and noise comparatively low.
The electronic engine management system ensures optimum engine performance at all times. It regulates all engine-related functions and assemblies. The results are optimum power output and torque with comparatively low fuel consumption and emissions – whatever the driving style.
One example is the cylinder-specific knock control. Since engine cylinders never all work under exactly the same conditions, the knock control function monitors each one separately. The ignition point is shifted individually, so as to protect the cylinders and pistons at high engine speeds and loads. For compliance with US standards, the on-board diagnostics detect any faults and defects that may occur in the exhaust and fuel systems and then display them on the on-board computer. This also helps to avoid increased pollutant emissions and unnecessary fuel consumption.
The Auto Start Stop function, which is integrated as standard in the Cayman models, switches off the engine when you stop, select neutral and release the clutch pedal. In cars with Porsche Doppelkupplung (PDK), it is simply a case of applying and holding the brake after you stop. All audio and communication systems remain switched on. The engine will restart as soon as you operate the clutch or, in cars with PDK, release the brake. This fuel-saving innovation is designed primarily for use in urban traffic.
The Auto Start Stop function can be deactivated and reactivated using a separate button on the center console. The function is deactivated automatically under particular circumstances, e.g. in the event of extreme outside temperatures, activation of the SPORT button or low battery charge.
Another efficiency-enhancing feature of the Cayman models is intelligent electrical system recuperation. The vehicle battery is recharged by the generator predominantly under braking. Thanks to this selective recharging, when you request full driving power, the maximum possible output of the engine can be directed straight to the road because the electrical systems are supplied mainly by the energy that was stored in the battery during the braking phase.