Vehicle with engine having enhanced warm-up operation mode
US6354266B1 · kind B1 · utility
18Cited by
7References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 20, 2000 |
| Grant date | Mar 12, 2002 |
| Priority date | — |
| Expiry date | Dec 20, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2250/38
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An enhanced warm-up operation mode operates a first portion of engine cylinders in a power mode and a second portion of engine cylinders in a braking mode. More fuel is injected into the powered cylinders in order to maintain engine speed and overcome the retarding force of the engine compression release brakes on the braking cylinders. The engine cycles through which cylinders are powered and which are braking during the warm-up procedure. The process reduces emissions, such as white smoke, that are common during cold start conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.