Method and apparatus for compression brake enhancement using fuel and an intercooler bypass
US6336447B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 8, 2000 |
| Grant date | Jan 8, 2002 |
| Priority date | — |
| Expiry date | May 8, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An engine exhaust braking method and apparatus bypasses intake air around the intercooler from the turbocharger while simultaneously injecting a minimum amount or greater of fuel per stroke into an engine cylinder during engine brake operation. The minimum amount of fuel is determined such that it is the smallest amount of fuel which will fully combust when the engine is operating at a particular speed. The apparatus includes a combustion engine, a turbocharger, an intercooler, and a compression release braking system. The compression release braking system includes an engine or vehicle electronic control unit, a compression release brake controller, a fuel injector, and an intercooler bypass assembly, wherein while the engine brake is engaged, a small amount of fuel is injected into the cylinders during the compression stroke, and engine intake air is bypassed around the intercooler from the turbocharger and directly into the engine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.