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A change in an operating mode of an automatic transmission

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  A change in an operating mode of an automatic transmission (mode D) for fuel conservation in internal combustion engines.
  The backbone of the idea is not to use the car's engine when there's no need. This means that the engine is automatically put into idling mode when the car is in no need of propulsion power:
  1. Free-wheeling - when the driver releases gas-pedal but hasn't yet pushed the break-pedal, which is especially effective in traffic jams.
  2. When the car is rolling down a hill and an angle of the slope is enough for keeping the speed up without use of the engine. If this angle is more pronounced and the car is picking up the speed, but the driver wants to simply keep up the speed (the car is gas-pedal oriented), then he would want to automatically repeatedly use his break-pedal, keeping up the needed speed or recharging accumulator (only for hybrid cars).
  This idea is easily put to life, doesn't need much funding, but as the result the clients get a huge competitive advantage compared to the other cars for cars with a stick shift it is a fuel conservation of about 15-20% (give or take depending on many factors, such as features of the landscape, road surface, wind resistance, car weight). This idea can either be incorporated in a cruise control mode or used constantly.
  For implementing this idea the automatic gear shift needs to be fixed to automatically go into neutral on its own when it's possible and needed (I'll repeat that the automatic gear shift handle is in Drive position) and an electronic gyroscope should be used, so that the car could know when the road slopes.
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