Exhaust gas aftertreatment system and method for preheating a catalytic converter
Patent Information
- Application Number
- DE602021028078
- Authority / Receiving Office
- DE · DE
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2021-12-02
- Publication Date
- 2025-03-26
- Estimated Expiration
- 2041-12-02
AI Technical Summary
Existing exhaust after-treatment systems for vehicles face challenges in quickly and efficiently heating catalytic converters to reduce pollutant emissions during engine startup, as current heater placements are exposed to high temperatures and result in prolonged heating times and energy losses due to bulky ducts.
Positioning the heater element downstream of the catalytic converter and using a gas recirculation method to preheat the catalytic converter through radiation and convection before engine startup, with a gas pump or vacuum canister to efficiently transfer heat and reduce emissions.
This solution reduces harmful emissions by ensuring the catalytic converter reaches light-off temperature quickly, minimizing exposure to high temperatures, and maintaining a compact system design while reducing energy losses and heating time.