公开(公告)号：US10451125B2

公开(公告)日：2019-10-22

申请号：US15674788

申请日：2017-08-11

Applicant: FORD GLOBAL TECHNOLOGIES, LLC

Inventor： Gregory Michael Pietron ,  Qi Wang ,  Yuji Fujii ,  Rohit Hippalgaonkar ,  Joseph F. Kucharski ,  Jason Meyer ,  Stuart N. Ford

IPC: F16D48/06 ,  F16D21/00 ,  F16D13/38 ,  F16H59/68 ,  F16H61/06

Abstract: A vehicle includes a transmission and a controller. The transmission has clutches that are configured to establish multiple speed ratios, including a first clutch. The first clutch has a measured drag torque distribution. The measured drag torque distribution has a median and a standard deviation. The controller is programmed to increase a pressure at a rate to engage the first clutch and to increase the rate in response to a measured first clutch torque exceeding the median by a predetermined multiple of the standard deviation.

公开(公告)号：US10994734B2

公开(公告)日：2021-05-04

申请号：US16435205

申请日：2019-06-07

Applicant: Ford Global Technologies, LLC

Inventor： Weitian Chen ,  Yang Xu ,  Zhengyu Dai ,  Stuart N. Ford ,  Qi Wang ,  Hong Jiang

IPC: B60W10/06 ,  B60W30/18 ,  B60W10/02 ,  B60W30/188 ,  B60W50/00

Abstract: Systems and methods for operating a driveline of a vehicle that includes an automatic transmission and a torque converter are described. In one example, vehicle launch is controlled according to a linear quadratic regulator that provides feedback control according to torque converter slip error and vehicle speed error. The vehicle launch is also controlled according to feed forward control that is based on requested torque converter slip and requested vehicle speed.

公开(公告)号：US10746291B2

公开(公告)日：2020-08-18

申请号：US16250650

申请日：2019-01-17

Applicant: Ford Global Technologies, LLC

Inventor： Yang Xu ,  Weitian Chen ,  Stuart N. Ford ,  Zhengyu Dai ,  Qi Wang ,  Hong Jiang

IPC: F16H61/14 ,  F02D11/10 ,  B60W10/06 ,  B60W10/02 ,  F16H59/46

Abstract: A method of operating a vehicle includes, responsive to a command to launch the vehicle and while the vehicle is in a first gear, determining, at a controller, a feedforward component including a target engine torque and a target bypass clutch torque, and a feedback component that is based on an error between the target converter slip and a measured converter slip and between the target wheel torque and a measured wheel torque. The method further includes changing a commanded engine torque and a commanded bypass clutch torque based on the feedforward component and the feedback component.

公开(公告)号：US10518773B2

公开(公告)日：2019-12-31

申请号：US15864564

申请日：2018-01-08

Applicant: FORD GLOBAL TECHNOLOGIES, LLC

Inventor： Yang Xu ,  Zhengyu Dai ,  Guopeng Hu ,  Sathish Atluri ,  David Peterson ,  Qi Wang

IPC: B60W30/18 ,  B60W10/02 ,  B60W10/184

Abstract: A vehicle includes a transmission, friction brakes, and a controller. The transmission has a clutch that is configured to transfer torque from an input of the transmission to a drive wheel. The controller is programmed to, in response to application of the friction brakes resulting in a stationary position of the vehicle, disengage the clutch to establish a neutral condition of the transmission. The controller is also programmed to, in response to a command to launch the vehicle while the transmission is in the neutral condition, engage the clutch. The controller is further programmed to, in response to an estimated wheel torque exceeding a rollback threshold during the clutch engagement, release the friction brakes. The wheel torque is based on an estimated clutch torque which is based on a clutch pressure and a transmission input torque.