Method for determining soot mass stored with a particulate filter

A particle filter and smoke particle technology, applied in the direction of machines/engines, electronic control of exhaust treatment devices, diagnostic devices of exhaust treatment devices, etc., can solve the problems of adding pressure sensors and increasing system costs, and achieve reduction cost effect
CN102654071AActive Publication Date: 2012-09-05FORD GLOBAL TECH LLC
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
FORD GLOBAL TECH LLC
Publication Date
2012-09-05

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Abstract

A method for determining soot mass oxidized during a particulate filter oxidation procedure is disclosed. In one example, soot mass is determined via an Arrhenius equation. The approach may provide cost savings and reliability improvements as compared to other ways of determining soot mass.
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Description

【Technical field】

[0001] The invention relates to a method for determining the mass of soot stored in a particulate filter. 【Background technique】

[0002] Carbonaceous soot may be a secondary product of some combustion processes. For example, some diesel engines may produce carbonaceous soot during periods of high engine load. More recently, gasoline engines have incorporated direct fuel injection into the engine cylinders to improve engine performance and fuel economy. However, injecting fuel directly into the engine cylinders also increases the likelihood of gasoline engines producing carbonaceous soot. Therefore, some manufacturers consider installing particulate filters in the exhaust system of gasoline engines.

[0003] The particulate filter retains carbonaceous soot, but over time, the accumulated soot in the particulate filter can reduce the flow of exhaust gas through the exhaust system. Therefore, engine back pressure may increase, thereby reducing engine effi...

Claims

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