Exhaust Gas Sensor Activation Control via Temperature and Time Thresholds
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Solution Overview
Problem
Existing exhaust gas sensors cannot accurately determine their active state due to temperature conditions alone, leading to potential impairments in detection data accuracy from remaining gas components.
Innovation Solution
A control apparatus for exhaust gas sensors that includes a temperature rise determination unit to assess both the temperature of oxygen-removing and measurement cells, and an activation determination unit to ensure the sensor is active based on both temperature and time conditions, thereby reducing the impact of obstructive gases on measurement accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If temperature condition alone is used to determine activation, then the determination process is simple, but measurement accuracy is compromised due to remaining gas components
Solution Approach 1:
The patent applies preliminary action by introducing a time condition that must be satisfied after the temperature threshold is reached. This time condition allows gas components to be sufficiently removed before the sensor is considered activated, ensuring measurement accuracy while maintaining a relatively simple determination process through the use of a time counter
2Speed
If only temperature threshold is checked, then the activation determination is fast, but detection accuracy is impaired by obstructive gases
Solution Approach 1:
The patent uses preliminary action by requiring a time condition to be satisfied after the temperature threshold is reached. The time counter tracks whether the necessary duration has elapsed since the temperature threshold was met, ensuring that obstructive gases have sufficient time to be removed before activation is confirmed, thus maintaining both speed and accuracy
3Measurement precision
If time condition is added to temperature condition, then measurement accuracy is improved, but the determination process becomes more complex
Solution Approach 1:
The patent implements preliminary action by establishing a time condition that must be satisfied after the temperature threshold is reached. The time counter provides a straightforward mechanism to track the elapsed time, adding minimal complexity to the determination process while significantly improving measurement accuracy by ensuring gas components are removed
Solution Approach 2:
The system uses self-service by automatically tracking the time condition through a time counter that operates independently once the temperature threshold is met. The control unit simply checks whether the time counter has reached the required value, allowing the system to self-determine activation status without requiring complex external monitoring
Data Source
AI summary
It is to determine whether a temperature rise condition of a first cell or a second cell is satisfied based on whether a first parameter has exceeded a predetermined first threshold or a second parameter has exceeded a predetermined second threshold. After satisfaction of the temperature rise condition, it is to determine that an exhaust gas sensor is in an active state upon determination that a corresponding time condition is satisfied.