Method and apparatus for controlling engine shutdown in hybrid vehicles
US8894540B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 13, 2012 |
| Grant date | Nov 25, 2014 |
| Priority date | — |
| Expiry date | Mar 2, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/62
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A hybrid vehicle is provided that includes a control system that controls the time required for engine shut down. An electric machine or integrated starter-generator may be used to apply a load to the combustion engine after an engine shut down signal is received. By reducing the time required to shut down the engine in a controlled manner, the catalytic converter can be conditioned by providing a desired volume of air and fuel to the catalyst to reduce emissions and increase fuel economy. If an indication is received that it is no longer desirable to shut down the engine, the engine may be restarted conventionally or started in a quick start mode by refueling the engine is the engine operating at a sufficient speed for a quick restart.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.