Engine control device
By predicting and adjusting the ignition timing delay using the electronic control unit of the engine control unit, the problem of excessive temperature rise of non-target devices in the engine of the multi-exhaust purification device is solved, and the appropriate heating and durability protection of the exhaust purification device are achieved.
CN122148436APending Publication Date: 2026-06-05TOYOTA JIDOSHA KK
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- TOYOTA JIDOSHA KK
- Filing Date
- 2025-11-12
- Publication Date
- 2026-06-05
AI Technical Summary
Technical Problem
In engines equipped with multiple exhaust purification devices, existing technologies struggle to prevent excessive temperature increases in non-target exhaust purification devices due to heating treatment, particularly leading to a decrease in the durability of the starting catalyst.
Method used
The electronic control unit of the engine control system implements filter temperature rise treatment, predicts and adjusts the ignition timing delay to control the temperature of the filter and the starting catalyst, and avoids excessive rise.
Benefits of technology
The temperature of the exhaust purification device was effectively controlled to prevent excessive heating of the catalyst during startup, ensuring its durability, and the filter was properly heated.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN122148436A_ABST
Abstract
The present application is to implement a temperature raising process for any one of a plurality of exhaust purification devices provided in an exhaust passage, without causing the temperature of other exhaust purification devices to excessively rise. An electronic control unit implements a temperature raising process for raising the temperature of a filter by delaying the ignition timing in an engine in which a catalyst and the filter are provided in an exhaust passage. Furthermore, the electronic control unit implements a prediction process for predicting a convergence value, i.e., a reaching temperature, of the temperature of the catalyst in the case where the engine is continued to be operated under the current operating conditions while the temperature raising process is implemented, and an adjustment process for adjusting the amount of delay of the ignition timing to the side of suppressing the temperature raising of the filter in the case where the reaching temperature predicted in the prediction process exceeds a predetermined upper limit temperature.
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