Abstract: Method and apparatus for controlling a cooling fan in a vehicle engine compartment, such as a tractor or combine. A fan control receives inputs from sensors and uses the sensor inputs in determining fan speeds which meet cooling needs while limiting fan energy consumption. Sensor data include at least one of PTO and transmission settings, throttle command and engine speed, and fan speed and air conditioner settings. Sensor data is received and processed in the fan control, which sends the greatest determined fan speed to a fan actuator. When the PTO is activated and the transmission is in park, fan speed can be controlled according to an alternate coolant temperature table. When throttle command is zero and engine speed is above a maximum, fan speed is set at maximum. When air conditioning is activated, fan speed is set at least at a predetermined minimum speed.

Abstract: A transmission controller determines a requested engine torque value. For an upshift the requested engine torque value is determined as a function of slippage of one of an off-going clutch. For a downshift, the requested engine torque value is determined as a function of actual sensed engine torque. The requested torque value is sent to an engine controller which controls the engine so that the engine generates the requested engine torque. Then the appropriate transmission clutches are swapped to complete the requested shift while the engine torque is controlled. The engine controller also limits engine torque to the requested engine torque value.

Abstract: A power boost control system is provided for an agricultural vehicle with an engine which is normally governor controlled to run at throttle-selected constant engine speed up to a normal or rated engine speed. The power boost control system receives a road speed signal. Power boost is enabled if the sensed road speed is greater than an “on” threshold, above which is considered to be a transport speed. Power boost is disabled if sensed road speed is less than an “off” threshold, below which is considered to be less than a transport speed. When power boost is enabled, the controller will increase maximum power limits to above normal levels, so that, for example, the desired road or transport speed can be maintained as the vehicle goes up a hill.

Abstract: Method and apparatus for controlling a cooling fan in a vehicle engine compartment, such as a tractor or combine. A fan control receives inputs from sensors and uses the sensor inputs in determining fan speeds which meet cooling needs while limiting fan energy consumption. Sensor data include at least one of PTO and transmission settings, throttle command and engine speed, and fan speed and air conditioner settings. Sensor data is received and processed in the fan control, which sends the greatest determined fan speed to a fan actuator. When the PTO is activated and the transmission is in park, fan speed can be controlled according to an alternate coolant temperature table. When throttle command is zero and engine speed is above a maximum, fan speed is set at maximum. When air conditioning is activated, fan speed is set at least at a predetermined minimum speed.

Abstract: A power boost control system is provided for an agricultural vehicle with an engine which is normally governor controlled to run at throttle-selected constant engine speed up to a normal or rated engine speed. The power boost control system receives a road speed signal. Power boost is enabled if the sensed road speed is greater than an “on” threshold, above which is considered to be a transport speed. Power boost is disabled if sensed road speed is less than an “off” threshold, below which is considered to be less than a transport speed. When power boost is enabled, the controller will increase maximum power limits to above normal levels, so that, for example, the desired road or transport speed can be maintained as the vehicle goes up a hill.