12-28-2005, 12:16 PM
[quote name='SILVY968' date='Dec 27 2005, 08:38 PM']Tornado Fuel Saver that will fit in our cars? At $45.00 it seems like an effective power adder.
Mercedes calls them tumble flaps and uses them in their engines.
[right][post="13795"]<{POST_SNAPBACK}>[/post][/right][/quote]
Can't say that I have ever seen a favorable review of the tornado, except for its ability to lighten the wallet. <img src="/forum/images/smilies/968/smile.gif" class="smilie" alt="" />
The concept is counter intuitive for maximum power - adding a restriction in the smallest pipe in the intake system. The technology that Mercedes uses is vastly different. The tumble flaps are at the very end of the intake pipe, just before it goes into the combustion chamber. They are also computer controlled and retract for maximum power. Short clip here:
The special feature of the intake manifold in the Mercedes six-cylinder engine is the electropneumatically driven flaps at the end of each intake duct. These make a considerable contribution to fuel economy. Mercedes engineers refer to these as tumble-flaps, which describes their function: they literally cause the fuel/air mixture to tumble, thereby increasing the turbulence of the airflow and allowing it to reach the combustion chambers at a higher speed for more even distribution. The result is more efficient and complete combustion.
Under partial load the tumble-flaps swivel up, optimise the airflow and thereby increase the speed of combustion - an advantage which is particularly noticeable in view of the leaner mixture caused by exhaust gas recirculation and which reduces the fuel consumption. The tumble flaps are not required under higher engine loads, therefore they are fully recessed into the intake manifold and do not disturb the intake process. This situation-related control of the tumble-flaps is based on a prestored, logic-controlled microcomputer program.
Mercedes calls them tumble flaps and uses them in their engines.
[right][post="13795"]<{POST_SNAPBACK}>[/post][/right][/quote]
Can't say that I have ever seen a favorable review of the tornado, except for its ability to lighten the wallet. <img src="/forum/images/smilies/968/smile.gif" class="smilie" alt="" />
The concept is counter intuitive for maximum power - adding a restriction in the smallest pipe in the intake system. The technology that Mercedes uses is vastly different. The tumble flaps are at the very end of the intake pipe, just before it goes into the combustion chamber. They are also computer controlled and retract for maximum power. Short clip here:
The special feature of the intake manifold in the Mercedes six-cylinder engine is the electropneumatically driven flaps at the end of each intake duct. These make a considerable contribution to fuel economy. Mercedes engineers refer to these as tumble-flaps, which describes their function: they literally cause the fuel/air mixture to tumble, thereby increasing the turbulence of the airflow and allowing it to reach the combustion chambers at a higher speed for more even distribution. The result is more efficient and complete combustion.
Under partial load the tumble-flaps swivel up, optimise the airflow and thereby increase the speed of combustion - an advantage which is particularly noticeable in view of the leaner mixture caused by exhaust gas recirculation and which reduces the fuel consumption. The tumble flaps are not required under higher engine loads, therefore they are fully recessed into the intake manifold and do not disturb the intake process. This situation-related control of the tumble-flaps is based on a prestored, logic-controlled microcomputer program.
