ISG Entry Control Without Battery Sensor
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
ISG vehicles without a battery sensor face operational limitations and customer complaints due to frequent deactivation of ISG logic, leading to decreased price competitiveness and reduced fuel economy benefits, as they require battery sensor activation for four hours after battery replacement.
Innovation Solution
An ISG entry apparatus and method that operates without a battery sensor by using a starting voltage detection unit, cooling water temperature detection unit, ISG entry frequency detection unit, accumulated charge amount detection unit, and starting number counting unit to determine when to perform ISG operations based on reference values, allowing the engine control unit to automatically stop and restart the engine.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a battery sensor is installed to monitor battery state for ISG operation, then ISG logic can be reliably controlled, but the device complexity and cost increase
Solution Approach 1:
The patent extracts the battery state monitoring function from the dedicated battery sensor and relocates it to the existing engine control unit. The ECU now directly detects battery voltage and current through its existing analog-to-digital conversion circuits, eliminating the need for a separate battery sensor while maintaining ISG operation reliability.
Solution Approach 2:
The engine control unit is designed to perform multiple functions: it controls engine operations, monitors battery state through voltage and current detection, and manages ISG logic. This multi-functional approach eliminates the need for dedicated battery sensor hardware while maintaining all necessary monitoring capabilities.
2Measurement precision
If a battery sensor is required for ISG operation, then accurate battery state monitoring is achieved, but vehicles requiring frequent battery repair experience ISG logic deactivation and operational limitations
Solution Approach 1:
The system performs preliminary detection of battery voltage and current through the ECU before ISG operations are initiated. By continuously monitoring battery state through existing circuits, the system ensures accurate measurement is already in place before repair needs arise, preventing operational interruptions.
Solution Approach 2:
The engine control unit serves itself by using its existing analog-to-digital conversion circuits to monitor its own battery connections and state. This self-monitoring capability eliminates dependence on external battery sensors, ensuring continuous operation even during battery repairs or replacements.
3Adaptability or versatility
If a battery sensor is mounted in ISG vehicles, then battery monitoring function is provided, but additional cost burden increases and price competitiveness decreases
Solution Approach 1:
The patent merges the battery monitoring function with the existing engine control unit, combining multiple functions (engine control, battery monitoring, ISG management) into a single integrated system. This eliminates the need for separate battery sensor components, reducing part counts and manufacturing costs while maintaining full battery monitoring capability.
Solution Approach 2:
The engine control unit uses its own existing analog-to-digital conversion circuits to perform battery state detection, eliminating the need for additional dedicated sensor hardware. This self-service approach reduces component requirements and manufacturing complexity while maintaining adaptability for battery monitoring.
Data Source
AI summary
An ISG entry apparatus and method is capable of operating ISG logic without employing a battery sensor. The ISG entry apparatus includes a starting voltage detection unit detecting a starting voltage of an ISG vehicle having no battery sensor mounted therein, a cooling water detection unit detecting a cooling water temperature of the ISG vehicle, an ISG entry frequency detection unit detecting an ISG entry frequency of the ISG vehicle, an accumulated charge amount detection unit detecting an accumulated charge amount of the ISG vehicle during driving, a starting number counting unit counting the starting number of the ISG vehicle, and an engine control unit determining whether or not to enter a mode in which an ISG operation is performed based on the starting voltage, the cooling water temperature, the ISG entry frequency, the accumulated charge amount, and the starting number and performing an ISG operation.