Adaptive Engine Start-Stop Control for Climate-Fuel Trade-offs
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Solution Overview
Problem
Existing vehicle engine start/stop systems with climate control inhibits fail to optimize engine shutdown duration based on individual driver habits and climate preferences, leading to suboptimal balance between climate control performance and fuel economy.
Innovation Solution
Adaptive adjustment of start/stop parameters, such as engine coolant temperature and evaporator temperature thresholds, based on learned driver behavior and climate control preferences to extend engine shutdown duration while maintaining passenger comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If climate control inhibits are applied to ensure passenger comfort during start/stop operations, then climate control performance is maintained, but fuel economy deteriorates due to reduced engine shutdown duration
Solution Approach 1:
The system dynamically adjusts the engine coolant temperature threshold adaptively based on learned driver behavior patterns and climate control preferences. Instead of using a fixed threshold, the threshold varies in real-time to optimize the balance between climate control performance and fuel economy, allowing longer engine shutdowns when conditions permit while maintaining passenger comfort.
Solution Approach 2:
The system changes the temperature parameter threshold based on driver-specific learned behavior and preferences. By modifying the coolant temperature threshold parameter adaptively rather than using a static value, the system extends engine shutdown duration while still meeting climate control requirements for individual drivers.
2Reliability
If the engine is restarted early to warm the engine to threshold temperature, then climate control performance is maintained, but fuel efficiency deteriorates due to reduced engine shutdown duration
Solution Approach 1:
The system dynamically adjusts the engine coolant temperature threshold based on driver behavior patterns and climate control preferences. This dynamic adjustment allows the engine to remain shutdown longer by lowering the restart threshold, thereby improving fuel efficiency while still maintaining adequate climate control performance for each driver's needs.
Solution Approach 2:
The system performs preliminary learning of driver behavior patterns and climate control preferences during normal operation. This learned information is then used to pre-adjust the temperature threshold before shutdown events, enabling optimized engine restart timing that improves fuel efficiency while ensuring climate control performance is maintained for each driver's specific needs.
3Reliability
If the same climate control inhibits are applied for every driver and driving situation, then climate control performance is consistently maintained, but adaptability to individual driver preferences deteriorates
Solution Approach 1:
The system applies different temperature thresholds tailored to each individual driver's learned behavior patterns and climate control preferences. Instead of using a uniform threshold for all drivers, the system customizes the threshold locally for each driver, thereby improving adaptability while maintaining climate control performance for each individual's needs.
Solution Approach 2:
The system continuously learns from driver behavior patterns and climate control preferences through feedback mechanisms. This learned information is used to adaptively adjust the temperature threshold, enabling the system to become increasingly tailored to each driver's preferences over time while consistently maintaining adequate climate control performance.
Data Source
AI summary
Methods and systems are provided for optimizing engine climate control performance and fuel economy in engines configured with start/stop capabilities. Climate control inhibits of start/stop actions are adjusted as a function of operator driving habits and climate control inputs and preferences. The approach enables climate performance to be improved while also allowing for frequent idle-stop operation.