Vehicle Torque Limit Map Switching for Faster App Updates
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Solution Overview
Problem
Existing vehicle control systems face challenges in smoothly updating software to change engine torque limits due to the need for preprocessing, which can be time-consuming.
Innovation Solution
A vehicle control system that includes a portable terminal and an on-vehicle control device, which stores multiple torque upper limit maps for different software versions, allowing the device to switch maps based on software updates without requiring software updates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If software update preprocess (download and notification) is performed every time torque limit changes are needed, then software version control is maintained, but update time and productivity are reduced
Solution Approach 1:
The patent segments the torque limit data from the software update process. Instead of updating the entire software package to change torque limits, the system separates torque limit maps as independent data elements that can be updated and transmitted separately from the main software, enabling faster updates for this specific parameter.
Solution Approach 2:
The system performs preliminary actions by preparing multiple torque limit maps in advance within the ECU memory for different software versions. When a software update is detected, the corresponding pre-prepared torque limit map is simply selected and activated, avoiding the need for real-time calculation or download during the update moment.
2Manufacturing precision
If complete software update process is performed to change engine torque limits, then accurate torque control is achieved, but time consumption and operational complexity increase
Solution Approach 1:
The patent extracts the torque limit map data from the complete software package. By taking out only the necessary torque limit parameters as separate updateable elements, the system achieves accurate torque control without requiring the time-consuming complete software update process, thus reducing update duration while maintaining precision.
Solution Approach 2:
The system implements dynamic switching between different torque limit maps based on the current software version. The ECU can dynamically select and switch between pre-stored torque limit maps corresponding to different software versions, enabling rapid adaptation without static reprogramming or complete software replacement.
3Adaptability or versatility
If multiple torque upper limit maps are stored for different software versions, then torque limit changes become possible without software updates, but memory requirements and device complexity increase
Solution Approach 1:
The patent applies universality by designing the ECU with a universal memory structure that can store multiple torque limit maps for different software versions. This universal storage capability allows the system to adapt to various software versions without requiring separate hardware configurations, achieving high adaptability with reasonable complexity through standardized multi-functional memory design.
Data Source
AI summary
A vehicle control system includes a portable terminal in which application software associated with a vehicle equipped with an engine is installed, and an on-vehicle control device is configured to store a plurality of torque upper limit maps each defining an upper limit of torque of the engine for each version of the application software, and to communicate with the portable terminal. The on-vehicle control device is configured to change a first torque upper limit map among the plurality of torque upper limit maps to a second torque upper limit map among the plurality of torque upper limit maps, on a basis of an update of the version of the application software installed in the portable terminal, and to use the second torque upper limit map for controlling the vehicle.