Systems and methods for non-linear proportional and derivative control during vehicle garage shifts
US8046144B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 26, 2007 |
| Grant date | Oct 25, 2011 |
| Priority date | — |
| Expiry date | Aug 24, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2061/0488
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The present disclosure utilizes Non-linear Proportional and Derivative (NLPD) control on a duty cycle of an applying clutch for stationary and rolling vehicle garage shifts. The applying clutch can be engaged by as electrically activated solenoid valve, and the present disclosure utilizes NLPD control to adjust the duty cycle of the solenoid to provide a smooth vehicle garage shift engagement. The present disclosure utilizes a control algorithm based on turbine speed, turbine acceleration, and output speed. The present disclosure can utilize an existing vehicle control unit, such as an engine control unit (ECU), transmission control unit (TCU), or the like, to receive turbine speed measurements, to calculate the solenoid duty cycle using NLPD control on the turbine speed acceleration error, and to adjust the solenoid driver on the solenoid valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.