Systems and methods for idle coasting management of a vehicle having predictive cruise control
A system, method, and apparatus includes management of coasting during operation of a vehicle equipped with a predictive cruise control system.
1. A vehicle system comprising:
an engine and a driveline that is selectively engageable to the engine;
a cycle efficiency management controller connected to the engine, the cycle efficiency management controller including an idle coasting management module operable to selectively disengage the driveline from the engine in response to one or more idle coasting management enablement conditions being present; and
a predictive cruise control module connected to the driveline and in electrical communication with the cycle efficiency management controller over a datalink that provides at least one of a wired or wireless connection to provide outputs from the predictive cruise control module to the cycle efficiency management controller, wherein the outputs from the predictive cruise control module are determined independently of the cycle efficiency management controller, and the outputs from the predictive cruise control module control a speed of the vehicle system in response to predictive cruise control being active, wherein the idle coasting management module is disabled to prevent disengagement of the driveline from the engine in response to predictive cruise control being active while the engine and driveline are engaged.
2. The system of claim 1 , wherein the predictive cruise control module is included with a transmission control unit as a single module.
3. The system of claim 1 , wherein the cycle efficiency management controller is connected to an engine control unit that is connected to the engine.
4. The system of claim 1 , wherein the idle coasting management module includes an arbitration module that is configured to receive a vehicle speed input, an active/inactive status of predictive cruise control of the vehicle system, a final vehicle speed request from the cycle efficiency management controller, and an engaged/disengaged status of the driveline from the idle coasting management module.
5. The system of claim 4 , wherein in response to predictive cruise control being active in the arbitration module, the idle coasting management module is disabled to prevent disengagement of the driveline from the engine.
6. The system of claim 4 , wherein the final vehicle speed request is from a cruise control governor module of the cycle efficiency management controller and is determined from a cruise control speed and a predictive cruise control speed adjustment request.
7. An apparatus for controlling operations of a vehicle including an engine and a driveline selectively engageable with the engine and a predictive cruise control module that is operable to control a speed of the vehicle when predictive cruise control of the speed is active, the apparatus comprising:
a cycle efficiency management controller including an intelligent coasting management module operable to selectively disengage the driveline from the engine in response to one or more idle coasting management enablement conditions being present; and
the cycle efficiency management controller being connectable to the predictive cruise control module over a datalink that is at least one of a wired or wireless connection to provide outputs from the predictive cruise control module to the cycle efficiency management controller that are independent of the cycle efficiency management controller and indicative of whether predictive cruise control is active or inactive, wherein the intelligent coasting management module is disabled from disengaging the driveline from the engine in response to predictive cruise control being active with one or more idle coasting management enablement conditions being present.
8. The apparatus of claim 7 , wherein the cycle efficiency management controller is connected to an engine control unit.
9. The apparatus of claim 7 , wherein the idle coasting management module includes an arbitration module that is configured to receive a vehicle speed input, an active/inactive status of predictive cruise control of the speed of the vehicle, a final vehicle speed request from the cycle efficiency management controller, and an engaged/disengaged status of the driveline from the idle coasting management module.
10. The apparatus of claim 9 , wherein in response to predictive cruise control being active in the arbitration module, the idle coasting management module is disabled to prevent disengagement of the driveline from the engine.
11. The apparatus of claim 9 , further comprising a gear down protection module that is configured to limit the speed of the vehicle when a transmission of the vehicle is not in top gear and the engine is not at full load.
12. The apparatus of claim 11 , wherein the gear down protection module receives an input of the predictive cruise control status and the limit on the speed of the vehicle is fixed in response to the predictive cruise control status being active.
13. The apparatus of claim 9 , wherein the cycle efficiency management controller includes a cruise control governor module that receives a predictive cruise control speed adjustment request from the predictive cruise control module and provides the final vehicle speed request to the arbitration module.