Engine throttle control with brake booster
US8726872B2 · kind B2 · utility
8Cited by
25References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 15, 2013 |
| Grant date | May 20, 2014 |
| Priority date | — |
| Expiry date | Jan 20, 2033 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02P5/1506
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Methods and systems are provided for reducing variability in air-fuel control due to variations in brake booster vacuum levels at an engine start. A throttle position is adjusted during an engine start based on the vacuum availability in the brake booster to control a rate of intake aircharge flow. By allowing aircharge to enter the intake manifold at a more consistent rate, air-fuel control is improved and exhaust emissions are reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.