Matthew P Kempeinen

20140007727, Jan 9, 2014

Jul 3, 2012

13/540661

Christopher Jay Weingartz - Holly MI, US
Matthew D. Whitton - Howell MI, US
Steven P. Moorman - Dexter MI, US
Matthew Kempeinen - Pinckney MI, US

GM GLOBAL TECHNOLOGY OPERATIONS LLC - Detroit MI

F16H 61/00

7447311

A method of adjusting a pressure signal to an actuator piston to control movement of a synchronizer actuator fork of a transmission includes moving the synchronizer actuator fork from a start position into a target position by applying an initial fluid pressure value. The time required to move the synchronizer actuator fork is measured to define a measured actuation time, and compared to a target actuation time. A correction factor is applied to the initial fluid pressure value to define a revised fluid pressure value when the measured actuation time is not within a pre-defined time range of the target actuation time. When the measured actuation time is greater than the pre-defined time range of the target actuation time, the initial fluid pressure value is increased. When the measured actuation time is less than the pre-defined time range of the target actuation time, the initial fluid pressure value is decreased.

20160039422, Feb 11, 2016

Aug 7, 2014

14/454259

- Detroit MI, US
Matthew Kempeinen - Pinckney MI, US
Paul R. Peterson - Orchard Lake MI, US
Matthew D. Whitton - Howell MI, US
Craig J. Hawkins - Howell MI, US

B60W 30/19
B60W 10/113
B60W 10/06
F16H 61/04
F02D 29/02

A method of controlling a clutch-to-clutch power-on upshift of a transmission includes defining a possible engine torque as a latched possible engine torque value. An on-coming clutch torque phase target value is defined as a latched on-coming clutch torque value, and held constant until a final ramp. A commanded engine torque is reduced and maintained to a maximum torque reduction value until a shift completion ratio is achieved. The commanded engine torque is increased until the commanded engine torque is equal to a restore ramp target value. Both the on-coming clutch torque and the commanded engine torque are simultaneously increased at a final ramp rate, such that the increase in the on-coming clutch torque parallels the increase in the commanded engine torque, until an actual engine torque is substantially equal to the possible engine torque, to complete the shift.

20140358383, Dec 4, 2014

May 31, 2013

13/906735

- Detroit MI, US
Matthew Kempeinen - Pinckney MI, US
Jeryl McIver - Inkster MI, US
Christopher Jay Weingartz - Holly MI, US
David H. Vu - East Lansing MI, US

F16H 61/04

701 51

A method of identifying a synchronous position of a synchronizer actuator fork includes sensing a deceleration rate of a first shaft, when a synchronizer is positioned in a neutral position, to define a first rate of deceleration. The synchronizer is moved along the first shaft from the neutral position toward a gear with a synchronizer actuator fork. A deceleration rate of the first shaft is sensed, while the synchronizer actuator fork moves the synchronizer along the first shaft, to identify a change from the first rate of deceleration to a second rate of deceleration. The location, of the synchronizer actuator fork relative to the first shaft, at which the rate of acceleration of the first shaft changes from the first rate of deceleration to the second rate of deceleration, is identified as the synchronous position of the synchronizer actuator fork.