Invention Grant
- Patent Title: Method and apparatus for controlling a powertrain system during deceleration
-
Application No.: US14923593Application Date: 2015-10-27
-
Publication No.: US09669835B2Publication Date: 2017-06-06
- Inventor: Kee Yong Kim , Anthony H. Heap , Michael Andrew Miller , Luke D. Shepley , Michael Vincent Woon
- Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
- Applicant Address: US MI Detroit
- Assignee: GM Global Technology Operations LLC
- Current Assignee: GM Global Technology Operations LLC
- Current Assignee Address: US MI Detroit
- Agency: Quinn IP Law
- Main IPC: B60W10/08
- IPC: B60W10/08 ; B60W30/18 ; B60W10/02 ; B60W10/06 ; B60W20/10 ; F02D41/12 ; B60K6/20 ; B60T1/10

Abstract:
A method for controlling a powertrain includes, in response to an output torque request that includes deceleration, operating an internal combustion engine in a fuel cutoff state and in a cylinder deactivation state, controlling a clutch of a torque converter in an activated state, and operating an electric machine in a regenerative braking state. A state of the powertrain related to engine speed is monitored. The internal combustion engine is commanded to transition from the cylinder deactivation state to an all-cylinder state and the electric machine operates in the regenerative braking state including ramping down magnitude of regenerative braking torque when the engine speed is less than a first threshold speed. The torque converter clutch is commanded to a released state when the engine speed is less than a second threshold speed, with the first threshold speed being greater than the second threshold speed.
Public/Granted literature
- US20170113695A1 METHOD AND APPARATUS FOR CONTROLLING A POWERTRAIN SYSTEM DURING DECELERATION Public/Granted day:2017-04-27
Information query