US 11,840,237 B2
Control device and method for controlling a vehicle powertrain to overcome, or avoid, a cog-to-cog condition, computer program, computer-readable medium and vehicle
Jonas Lindström, Hägersten (SE)
Assigned to Scania CV AB, Södertälje (SE)
Appl. No. 17/610,358
Filed by Scania CV AB, Södertälje (SE)
PCT Filed May 5, 2020, PCT No. PCT/SE2020/050452
§ 371(c)(1), (2) Date Nov. 10, 2021,
PCT Pub. No. WO2020/236060, PCT Pub. Date Nov. 26, 2020.
Claims priority of application No. 1950587-4 (SE), filed on May 17, 2019.
Prior Publication US 2022/0227371 A1, Jul. 21, 2022
Int. Cl. B60W 30/19 (2012.01); F16H 61/04 (2006.01)
CPC B60W 30/19 (2013.01) [B60W 2510/081 (2013.01); B60W 2510/10 (2013.01); F16H 2061/047 (2013.01); F16H 2061/0418 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A method for controlling a vehicle powertrain to overcome, or avoid, a cog-to-cog condition during gear shifting, the method performed by a control device,
the powertrain comprising:
a propulsion unit; and
a gearbox comprising:
an input shaft;
a lay shaft connected to the input shaft;
a main shaft connected to the lay shaft;
a first gear wheel configured to be engaged to the main shaft by a first coupling sleeve, the first coupling sleeve being axially movable and rotatably fixed to the main shaft; and
a synchromesh arrangement comprising a second coupling sleeve and configured to engage the first gear wheel and/or a second gear wheel to the input shaft,
wherein the method comprising:
while the input shaft is rotating, controlling the synchromesh arrangement so as to induce and/or increase a difference in rotational speed between the first gear wheel and the first coupling sleeve by at least partly engaging the first gear wheel or the second gear wheel to the input shaft, wherein controlling the synchromesh arrangement comprises controlling an actuator of the synchromesh arrangement so as to achieve a desired frictional force in the synchromesh arrangement, thereby in turn obtaining a desired amount of difference in rotational speed between the first gear wheel and the first coupling sleeve.