Noise, vibration and harshness reduction in a skip fire engine control system
US9512794B2 · kind B2 · utility
70Cited by
36References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 11, 2016 |
| Grant date | Dec 6, 2016 |
| Priority date | — |
| Expiry date | Jan 11, 2036 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2041/0012
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A variety of methods and arrangements for reducing noise, vibration and harshness (NVH) in a skip fire engine control system are described. In one aspect, a firing sequence is used to operate the engine in a skip fire manner. A smoothing torque is determined that is applied to a powertrain by an energy storage/release device. The smoothing torque is arranged to at least partially cancel out variation in torque generated by the skip fire firing sequence. Various methods, powertrain controllers, arrangements and computer software related to the above operations are also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.