ISG Controller Parking Intention Detection
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Solution Overview
Problem
The ISG system in vehicles repeatedly stops and starts the engine during low-speed forward and backward movements for parking, leading to reduced fuel efficiency and safety instability due to frequent engine idle-stopping and restarting.
Innovation Solution
An ISG system with a shift stage sensing unit, parking sensing unit, and ISG controller that recognizes the driver's intention to park by using GPS, cameras, and parking assistant sensors, preventing engine idle-stop during parking by maintaining engine operation for a predetermined time, distance, or speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the ISG system operates normally with engine idle-stop function, then fuel efficiency is improved, but during parking operations the engine repeatedly stops and starts causing safety instability and reduced fuel efficiency
Solution Approach 1:
The system changes the operational parameters of the engine by detecting parking conditions through multiple sensors (shift stage, parking lot detection, parking assistant system) and adjusting the idle-stop control accordingly. When parking conditions are detected, the system modifies the normal idle-stop parameters to prevent engine shutdown, thereby maintaining safety stability while preserving fuel efficiency benefits during non-parking operations.
2Reliability
If the engine is repeatedly idle-stopped and restarted during parking, then fuel efficiency is reduced, but the ISG system continues to operate without recognition of parking intention
Solution Approach 1:
The system implements a feedback mechanism by continuously monitoring multiple parameters (shift stage sensing, GPS location, parking assistant system status) to detect when the vehicle is in parking mode. This feedback loop allows the ISG controller to recognize parking intention and adjust engine control accordingly, preventing unnecessary idle-stop operations that would reduce fuel efficiency while maintaining operational stability.
3Measurement precision
If the ISG system uses multiple sensing units to detect parking intention, then parking recognition accuracy is improved, but system complexity increases
Solution Approach 1:
The system employs multi-functionality by utilizing existing vehicle sensors and systems for multiple purposes. The shift stage sensing unit, GPS receiver, and parking assistant system sensors are not only used for their primary functions but also integrated to detect parking intention. This approach improves parking recognition accuracy without significantly increasing system complexity, as it leverages already-present components.
Data Source
AI summary
An ISG system may include a shift stage sensing unit that senses a shift stage of a transmission, a parking sensing unit that senses a driver's intension of parking by recognizing at least one of whether a vehicle enters a parking lot and whether a parking assistant system may be operated, and an ISG controller that stops an idle-stop of an engine when the shift stage of the shift stage sensing unit may be at a reverse stage or the parking sensing unit senses the driver's intension of parking.