ECU Active Tuning via Airflow Meter Table
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Solution Overview
Problem
Current engine control unit (ECU) systems require external computing power, such as laptops, for active tuning, which is inefficient and cannot meet the demands of high-performance vehicles like racing vehicles and performance sports cars, lacking a system for internal ECU-based active tuning.
Innovation Solution
A self-contained process that allows real-time updating of fuel and ignition tables within the ECU without external hardware, using RAM to retain and modify tuning tables over multiple driving cycles, enabling high-quality table generation without user input.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If external computing power (laptop) is used for active tuning, then tuning capability is provided, but system complexity and portability are worsened
Solution Approach 1:
The patent merges the tuning functionality directly into the ECU by integrating a programmable microcontroller and RAM memory within the ECU itself. This allows the ECU to store and update fuel/ignition tables internally without requiring external computing devices, thus resolving the contradiction between providing tuning capability and reducing system complexity.
Solution Approach 2:
The ECU is designed to perform active tuning autonomously using its own programmable microcontroller and memory resources. The system can self-adjust fuel and ignition parameters by storing updated tables in its internal RAM, eliminating the need for external laptops or tuning devices, thereby reducing system complexity while maintaining adaptability.
2Adaptability or versatility
If external hardware is used for tuning, then tuning functionality is achieved, but efficiency and speed are worsened
Solution Approach 1:
By combining the tuning functionality with the ECU's internal processing units and memory, the system enables real-time updates of fuel and ignition tables during engine operation. This eliminates the inefficiency of external hardware connections and allows immediate parameter adjustments, significantly improving tuning efficiency and speed.
Solution Approach 2:
The ECU pre-allocates RAM memory specifically for storing fuel and ignition tables, allowing these critical parameters to be readily available and instantly updateable during engine operation. This preliminary preparation of memory resources enables rapid tuning responses without external hardware delays.
3Ease of manufacture
If fixed behavior ECU is used, then manufacturing simplicity is maintained, but adaptability to modifications is worsened
Solution Approach 1:
The patent transforms the ECU from a fixed-behavior device to a dynamic, reconfigurable system by incorporating a programmable microcontroller and writable RAM memory. This allows the ECU to adapt its fuel and ignition parameters in real-time based on engine modifications or performance requirements, while the base manufacturing process remains relatively simple using standard microcontroller components.
Solution Approach 2:
The system enables easy modification of engine parameters by allowing users to programmatically change the fuel and ignition tables stored in the ECU's RAM. This provides high adaptability to engine modifications without requiring complex hardware changes, maintaining manufacturing simplicity while enabling flexible parameter adjustment.
Data Source
AI summary
A method for an engine control unit to conduct real time updating of data tables based on feedback from the air flow sensor without external computing. The air fuel ratio is based on information received from an air flow meter, where a look-up table is actively tuned for the air flow calibration instead of the volumetric efficiency tables. Here, the look-up table involves a single dimension value so the calculations are simpler than more complex evaluations previously set forth.