US 11,718,302 B2
System and method for increasing upshift engine torque
Frieder Mohr, Tettnang (DE); Christian Villing, Friedrichshafen (DE); Thomas Stark, Wasserburg (DE); Yoshitaka Shitani, Ann Arbor, MI (US); Matthew J. Tucker, Plain City, OH (US); Yasuhiro Gokan, Dublin, OH (US); Christopher Hopp, Dublin, OH (US); Ryuichi Mori, Utsunomiya (JP); Makoto Kobayashi, Utsunomiya (JP); and Ryuji Murata, Utsunomiya (JP)
Assigned to ZF FRIEDRICHSHAFEN AG, Friedrichshafen (DE); and HONDA MOTOR CO., LTD., Tokyo (JP)
Filed by ZF Friedrichshafen AG, Friedrichshafen (DE); and Honda Motor Co., Ltd., Tokyo (JP)
Filed on Nov. 13, 2020, as Appl. No. 17/97,260.
Claims priority of provisional application 62/935,757, filed on Nov. 15, 2019.
Prior Publication US 2021/0146931 A1, May 20, 2021
Int. Cl. B60W 30/19 (2012.01); B60W 10/02 (2006.01); B60W 10/06 (2006.01); B60W 10/11 (2012.01); F16H 61/00 (2006.01); B60W 10/115 (2012.01); B60W 20/30 (2016.01)
CPC B60W 30/19 (2013.01) [B60W 10/02 (2013.01); B60W 10/06 (2013.01); B60W 10/11 (2013.01); F16H 61/00 (2013.01); B60W 10/115 (2013.01); B60W 20/30 (2013.01); B60W 2510/0657 (2013.01); B60W 2510/0695 (2013.01); B60W 2510/107 (2013.01); B60W 2510/1015 (2013.01); B60W 2520/10 (2013.01); B60W 2710/0666 (2013.01); B60W 2710/1005 (2013.01); F16H 2061/0075 (2013.01); F16H 2200/0065 (2013.01); F16H 2200/2012 (2013.01); F16H 2200/2046 (2013.01); F16H 2200/2094 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A drive train control method, comprising:
transmitting a total time period of a stroke phase and a torque phase of an upshift from a transmission control unit of an automatic transmission to an engine control unit of an engine;
closing a first shift element of the automatic transmission during the upshift, a control pressure of the first shift element increasing during the torque phase relative to the control pressure of the first shift element at an end of the stroke phase;
opening a second shift element of the automatic transmission during the upshift, a control pressure of the second shift element decreasing during the torque phase relative to the control pressure of the second shift element at the end of the stroke phase;
increasing a target torque of the engine during the torque phase, the target torque of the engine begins increasing prior to an end of the stroke phase; and
based at least in part on the total time period of the stroke and torque phases, increasing an actual torque of the engine during the upshift such that the actual torque of the engine increases to a higher gear torque prior to an end of the torque phase.