System, method, and apparatus for operating a high efficiency, high output transmission
A transmission includes an input shaft coupled to a prime mover, a countershaft, main shaft, and an output shaft, with gears between the countershaft and the main shaft. A shift actuator selectively couples the input shaft to the main shaft by rotatably coupling gears between the countershaft and the main shaft. The shift actuator is mounted on an exterior wall of a housing including the countershaft and the main shaft. A controller controls the shift actuator utilizing an actuating pulse and an opposing pulse.
1. An apparatus, comprising: a shift control logic configured to:
provide a first opposing pulse command of a plurality of opposing pulse commands, the first opposing pulse command comprising a first predetermined amount of air above an ambient amount of air in a first closed volume, wherein pressure in the first closed volume opposes movement of a pneumatic shift actuator of a transmission in a shift direction;
provide a first actuating pulse command of a plurality of actuating pulse commands, the first actuating pulse command comprising a second predetermined amount of air above an ambient amount of air in a second closed volume, wherein pressure in the second closed volume promotes movement of the pneumatic shift actuator in the shift direction;
determine that a synchronizer engagement is imminent, and upon determination, interrupt the first actuating pulse command and provide a second actuating pulse command after a predetermined event; and
release pressure in the first closed volume and the second closed volume in response to determining a shift completion event.
2. The apparatus of claim 1 , wherein the predetermined event is a response to a timing of the shift control logic provisioning of the plurality of actuating pulse commands and the plurality of opposing pulse commands.
3. The apparatus of claim 1 , wherein the predetermined event is a response to a pulse timing of the plurality of actuating pulse commands and the plurality of opposing pulse commands.
4. The apparatus of claim 1 , wherein the predetermined event is a response to a timing after the pneumatic shift actuator disengages from a previously engaged gear.
5. The apparatus of claim 1 , wherein the predetermined event is a response to an expiration of a predetermined opposing pulse delay time.
6. The apparatus of claim 1 , wherein the predetermined event is a response to a shift actuator rail position that provides a scheduled amount of opposition to the shift actuator.
7. The apparatus of claim 1 , wherein the predetermined event is a response to a shift rail velocity.
8. The apparatus of claim 1 , wherein the shift control logic is further configured to modulate the first actuating pulse command in response to a previously determined gear departure position value.
9. The apparatus of claim 8 , wherein the modulation is based on a filtering, rate limited, or debounced updating of the previously determined gear departure position value.
10. A system, comprising:
a transmission having a pneumatic shift actuator; and
a controller, comprising:
a shift control logic configured to:
provide a first opposing pulse command of a plurality of opposing pulse commands, the first opposing pulse command comprising a first predetermined amount of air above an ambient amount of air in a first closed volume, wherein pressure in the first closed volume opposes movement of a pneumatic shift actuator of a transmission in a shift direction;
provide a first actuating pulse command of a plurality of actuating pulse commands, the first actuating pulse command comprising a second predetermined amount of air above an ambient amount of air in a second closed volume, wherein pressure in the second closed volume promotes movement of the pneumatic shift actuator in the shift direction;
determine that a synchronizer engagement is imminent, and upon determination, interrupt the first actuating pulse command and provide a second actuating pulse command after a predetermined event; and
release pressure in the first closed volume and the second closed volume in response to determining a shift completion event.
11. The system of claim 10 , wherein the predetermined event is a response to a timing of the shift control logic provisioning of the plurality of actuating pulse commands and the plurality of opposing pulse commands.
12. The system of claim 10 , wherein the predetermined event is a response to a pulse timing of the plurality of actuating pulse commands and the plurality of opposing pulse commands.
13. The system of claim 10 , wherein the predetermined event is a response to a timing after the pneumatic shift actuator disengages from a previously engaged gear.
14. The system of claim 10 , wherein the predetermined event is a response to an expiration of a predetermined opposing pulse delay time.
15. The system of claim 10 , wherein the predetermined event is a response to a shift actuator rail position that provides a scheduled amount of opposition to the shift actuator.
16. The system of claim 10 , wherein the predetermined event is a response to a shift rail velocity.
17. The system of claim 10 , wherein the shift control logic is further configured to modulate the first actuating pulse command in response to a previously determined gear departure position value.
18. The system of claim 17 , wherein the modulation is based on a filtering, rate limited, or debounced updating of the previously determined gear departure position value.
19. A method, comprising:
providing a first opposing pulse command of a plurality of opposing pulse commands, the first opposing pulse command comprising a first predetermined amount of air above an ambient amount of air in a first closed volume, wherein pressure in the first closed volume opposes movement of a pneumatic shift actuator of a transmission in a shift direction;
providing a first actuating pulse command of a plurality of actuating pulse commands, the first actuating pulse command comprising a second predetermined amount of air above an ambient amount of air in a second closed volume, wherein pressure in the second closed volume promotes movement of the pneumatic shift actuator in the shift direction;
determining that a synchronizer engagement is imminent, and upon determination, interrupting the first actuating pulse command and providing a second actuating pulse command after a predetermined event; and
releasing pressure in the first closed volume and the second closed volume in response to determining a shift completion event.
20. The method of claim 19 , wherein the predetermined event comprises one or more of:
a response to a timing of a shift control logic provisioning of the plurality of actuating pulse commands and the plurality of opposing pulse commands;
a response to a pulse timing of the plurality of actuating pulse commands and the plurality of opposing pulse commands;
a response to a timing after the pneumatic shift actuator disengages from a previously engaged gear;
a response to an expiration of a predetermined opposing pulse delay time;
a response to a shift actuator rail position that provides a scheduled amount of opposition to the shift actuator; and
a response to a shift rail velocity;
wherein the shift control logic is further configured to modulate the first actuating pulse command in response to a previously determined gear departure position value, and wherein the modulation is based on a filtering, rate limited, or debounced updating of the previously determined gear departure position value.