System and method for particulate filter cleaning
By using the reverse rotation of the turbocharger or HEV motor in the engine shutdown state, ambient air flows through PF and deposits smoke on the intake air filter, the problem of low cleaning efficiency in the prior art is solved, and efficient cleaning and emission quality are improved.
CN109386348BActive Publication Date: 2025-03-25FORD GLOBAL TECH LLC
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Patent Information
- Application Number
- CN201810907012.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Priority Date
- 2017-08-11
- Filing Date
- 2018-08-10
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2038-08-10
AI Technical Summary
Technical Problem
The prior art is difficult to efficiently clean smoke in the exhaust particulate filter (PF) during the engine shutdown state, resulting in increased exhaust back pressure, reduced engine efficiency, and failure to clean in time during prolonged operation.
Method used
By utilizing the reverse rotation of a turbocharger or hybrid electric vehicle (HEV) motor during the engine shutdown state, ambient air flows through the PF, the accumulated soot is removed, and the soot is deposited on the intake air filter to burn it when the engine is started.
Benefits of technology
This method can efficiently clean PF in the engine shutdown state, reduce exhaust back pressure, improve engine efficiency, and burn smoke when the engine starts, improving emission quality and fuel economy.
✦ Generated by Eureka AI based on patent content.
Abstract
The present invention relates to systems and methods for particulate filter cleaning. Methods and systems are provided for cleaning an exhaust particulate filter by routing air through the exhaust particulate filter during vehicle shutdown conditions. In one example, during vehicle shutdown conditions, a turbocharger may be reversed via an electric motor, or an engine may be reversed via an electric motor to route air through the exhaust particulate filter, and soot collected from the particulate filter may then be deposited on an air filter coupled to an intake manifold. During a subsequent engine start, soot from the intake air filter may be routed to an engine cylinder for combustion.
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