Vehicle exhaust gas recirculation system utilizing an intake air pre-heater
US11149697B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 30, 2019 |
| Grant date | Oct 19, 2021 |
| Priority date | — |
| Expiry date | Feb 15, 2039 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An exhaust gas recirculation (EGR) system utilizes an intake air pre-heater to selectively heat the cool, dry intake air prior to the mixing point with the hot, humid EGR gases. This intake air pre-heater utilizes available heat from a high pressure (HP) EGR heat exchanger, circulating a cooling/heating fluid between the HP EGR heat exchanger and the intake air pre-heater. The intake air pre-heater is disposed in an intake air filter box, optionally on the dirty side of the air filter, and includes a heat exchanger conduit that is contacted with the intake air. The selective operation of the intake air pre-heater is controlled via an electronic control module (ECM) of the vehicle, based on the operating conditions of the vehicle and an appropriate temperature control model. Flow of the cooling/heating fluid is selectively enabled/disabled by a pump and/or valve assembly disposed along the associated high temperature (HT) cooling/heating circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.