System and method to improve drivability with deceleration fuel shut off
US7591758B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 22, 2005 |
| Grant date | Sep 22, 2009 |
| Priority date | — |
| Expiry date | Nov 15, 2026 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2200/0802
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method of controlling fuel injection in an engine of a vehicle having an all wheel drive or 4×4 system comprises restricting deactivation of the fuel injection during some deceleration conditions when the vehicle is in an all wheel drive, or 4×4, low gear. According to another aspect, a method comprises restricting deactivation of fuel injection during deceleration operations under all wheel drive, or 4×4 low gear operation; and disabling the fuel injection during at least some deceleration operation under other conditions. Disabling deactivation in an all wheel drive or 4×4 low gear allows a more controlled drivability at a time when any torque disturbance may be magnified and more easily felt by the vehicle driver.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.