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Gearbox control device

  • US 8,527,163 B2
  • Filed: 03/05/2010
  • Issued: 09/03/2013
  • Est. Priority Date: 04/15/2009
  • Status: Expired due to Fees
First Claim
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1. A transmission control device for at least one of controlling and regulating operation of either an automatic or an automated transmission of a motor vehicle, the transmission control device comprising:

  • the transmission control device communicates with the automatic or the automated transmission, an engine control device, a navigation device and a plurality of sensors to transmit driving condition data, vehicle mass data, driving resistance data, vehicle inclination data, vehicle velocity data, vehicle acceleration data, engine rotational speed data, engine torque data, and data about a driver'"'"'s wishes therebetween,a shifting strategy of the transmission control unit controls and regulates operation of the transmission based on at least one of the driving condition data, the vehicle mass data, the driving resistance data, the vehicle inclination data, the vehicle velocity data, the vehicle acceleration data, the engine rotational speed data, the engine torque data, and also based on the data about the driver'"'"'s wishes,the automatic or the automated transmission comprises a plurality of gears which are controlled by the transmission control device, the shifting strategy of the transmission control device initiates a gear change from a current actual gear into a targeted gear based on topographic data of a defined distance ahead of a current position of the motor vehicle, the defined distance ahead of the motor vehicle being determined by the transmission control device depending on the vehicle velocity, and at least one of;

    when the transmission control device detects from the topographic data of the defined distance ahead of the current position of the motor vehicle that a level section of drive surface follows an adjacent declined section of drive surface, the transmission control device triggers a gear upshift from the current actual gear to reduce engine braking effect;

    when the transmission control device detects that either a steep decline lies ahead of the motor vehicle or that the motor vehicle is located at a start of an extended section of a decline, the transmission control device blocks coasting upshifts and only permits shifts in the transmission to protect the drive assembly from excessive rotational speed; and

    when the transmission control device detects that the motor vehicle is currently located in a plane and that a decline section follows the plane, the transmission control device calculates which of the gears must be engaged in the transmission, such that the motor vehicle in the decline section is operable at a constant drive speed through a braking effect of the driving assembly using an engine drag moment.

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