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1. US20200317182 - Integrated powertrain control of engine and transmission

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

Claims

1. An apparatus of a vehicle, comprising:
an engine control circuit structured to control an engine speed;
a transmission control circuit structured to control an operating parameter of a transmission;
an implement control circuit structured to control an implement; and
a processing circuit structured to receive one of a travel signal indicative of a travel mode for the vehicle and an implement signal indicative of an implement mode for the vehicle,
in response to receiving the travel signal indicative of operating in the travel mode, the transmission control circuit is structured to determine the engine speed and the implement control circuit limits an implement torque to maintain the engine speed; and
in response to receiving the implement signal indicative of operating in the implement mode, the engine control circuit is structured to determine the engine speed and the transmission control circuit limits a propulsion torque to maintain the engine speed.
2. The apparatus of claim 1, wherein the engine control circuit is structured to determine a torque reserve, and
wherein the processing circuit is structured to compare the torque reserve to a torque reserve threshold,
in response to the torque reserve being less than or equal to the torque reserve threshold and the vehicle operating in the travel mode, the implement control circuit limits the implement torque, and
in response to the torque reserve being less than or equal to the torque reserve threshold and the vehicle operating in the implement mode, the transmission control circuit limits the propulsion torque.
3. The apparatus of claim 1, wherein the engine control circuit is structured to determine a minimum fuel consumption torque, and
wherein the processing circuit is structured to determine a total torque demand and to compare the total torque demand to the minimum fuel consumption torque,
in response to the total torque demand being greater than or equal to the minimum fuel consumption torque and the vehicle operating in the travel mode, the transmission control unit is structured to change the engine speed, and
in response to the total torque demand being greater than or equal to the minimum fuel consumption torque and the vehicle operating in the implement mode, the transmission control circuit is structured to change a transmission arrangement.
4. The apparatus of claim 1, wherein the transmission control circuit is structured to control a pump and a motor,
wherein the transmission is a continuously variable transmission, and
wherein the implement is a front end loader of the vehicle.
5. The apparatus of claim 1, wherein the implement control circuit is structured to receive information from a user operated accelerator pedal of the vehicle, and
wherein the engine speed is dependent on the information received from the user operated accelerator pedal in the implement mode.
6. The apparatus of claim 1, wherein the implement includes a working hydraulic system and the implement control circuit is structured to control at least one of a motor and a pump of the working hydraulic system.
7. The apparatus of claim 1, further comprising a manually operated switch movable between an implement mode position and a travel mode position.
8. The apparatus of claim 1, wherein the processing circuit automatically selects the travel mode or the implement mode based on receipt of the travel signal or the implement signal.
9. The apparatus of claim 8, wherein the implement signal is automatically sent when a user interacts with a joystick.
10. The apparatus of claim 1, further comprising a limiting circuit structured to inhibit use of the implement mode.
11. The apparatus of claim 10, wherein the limiting circuit is structured to inhibit use of the implement mode when the vehicle is located on a roadway or travelling above a threshold speed.
12. An apparatus of a vehicle, comprising:
a processing circuit comprising at least one processor coupled to at least one non-transitory memory device, the processing circuit structured to:
determine a torque reserve;
receive one of a travel signal indicative of a travel mode for the vehicle and an implement signal indicative of an implement mode for the vehicle;
prioritize propulsion torque over implement torque when the travel signal is received by limiting implement torque when the torque reserve is less than or equal to a predetermined threshold; and
prioritize implement torque over propulsion torque when the implement signal is received by limiting propulsion torque when the torque reserve is less than or equal to an implement torque predetermined threshold.
13. The apparatus of claim 12, wherein the implement signal is automatically sent when a user interacts with an implement of the vehicle.
14. The apparatus of claim 12, further comprising a working hydraulic system and a continuously variable transmission,
wherein the processing circuit limits the power consumed by the working hydraulic system when the travel signal is received, and
wherein the processing circuit limits the power consumed by the continuously variable transmission when the implement signal is received.
15. The apparatus of claim 12, wherein the processing circuit is further structured to:
determine a total propulsion torque estimate;
determine a hydraulic torque estimate;
determine a torque demand based at least in part on the total propulsion torque estimate and the hydraulic torque estimate; and
determine a minimum fuel consumption torque.
16. The apparatus of claim 15, wherein when the travel signal is received, the processing circuit is structured to decrease an engine speed when the torque demand is greater than or equal to the minimum fuel consumption torque, and
wherein when the implement signal is received, the processing circuit is structured to decrease a requested pump and motor displacement of a working hydraulic system when the torque demand is greater than or equal to the minimum fuel consumption torque.
17. The apparatus of claim 12, wherein when the travel signal is received, the processing circuit is structured to decrease an engine speed until a torque demand is less than or equal to a minimum fuel consumption torque, and
wherein when the implement signal is received, the processing circuit is structured to decrease a requested pump and motor displacement of a working hydraulic system until the torque demand is less than or equal to the minimum fuel consumption torque.
18. The apparatus of claim 12, further comprising a limiting circuit structured to inhibit use of the implement mode.
19. The apparatus of claim 18, wherein the limiting circuit is structured to inhibit use of the implement mode when the vehicle is located on a roadway or travelling above a threshold speed.
20. A method, comprising:
determining a total propulsion torque estimate;
determining a hydraulic torque estimate;
determining a torque demand based at least in part on the total propulsion torque estimate and the hydraulic torque estimate;
determining a torque reserve;
receiving a travel signal indicative of a travel mode for a vehicle;
receiving an implement signal indicative of an implement mode for the vehicle;
prioritizing propulsion torque over implement torque when the travel signal is received by limiting implement torque when the torque reserve is less than or equal to a travel predetermined threshold;
prioritizing implement torque over propulsion torque when the implement signal is received by limiting propulsion torque when the torque reserve is less than or equal to an implement predetermined threshold;
decreasing an engine speed when the torque demand is greater than or equal to a minimum fuel consumption torque and the travel signal has been received; and
decreasing a requested pump and motor displacement of a working hydraulic system when the torque demand is greater than or equal to the minimum fuel consumption torque and the implement signal has been received.