Adaptive Engine Torque Correction for Vehicle Load
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional engine torque control systems face challenges in maintaining drivability under varying vehicle loads, leading to shocks or jerks during acceleration and deceleration, especially in fully loaded trucks or overloaded buses, as they assume a constant vehicle load.
Innovation Solution
A method and system that determine a vehicle load condition over a predetermined time, calculate an average engine torque, and apply a correction factor to adjust the engine torque using a normal torque filter, dividing the torque adjustment into subregions to smoothly increase or decrease engine torque based on actual load conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a conventional torque filter is used assuming constant vehicle load, then the engine torque control is simplified, but shock or jerk occurs during acceleration or deceleration under varying vehicle loads
Solution Approach 1:
The patent applies dynamics by transitioning from a static torque filter (assuming constant load) to a dynamic torque filter that adapts to varying vehicle loads. The system continuously monitors vehicle load conditions and adjusts the torque filter parameters in real-time, allowing the engine torque control to respond dynamically to changing operational conditions, thereby preventing shock or jerk during acceleration or deceleration.
Solution Approach 2:
The patent implements parameter changes by modifying the torque filter characteristics based on detected vehicle load conditions. When vehicle load changes are detected, the system adjusts the torque filter parameters (such as filtering coefficients or time constants) to match the new load condition, ensuring smooth torque transitions and maintaining drivability across different operating scenarios.
2Speed
If engine torque is increased or reduced quickly to the calculated target torque, then the responsiveness to driver intention is improved, but impact occurs and drivability is deteriorated
Solution Approach 1:
The patent uses dynamics to create an adaptive torque control system that adjusts the rate of torque change based on vehicle load conditions. The system dynamically balances responsiveness and smoothness by modifying the torque filter parameters according to the detected load, allowing faster torque changes when appropriate while preventing impact when load conditions require gentler transitions.
Solution Approach 2:
The patent implements feedback by continuously monitoring vehicle load conditions and using this information to adjust the torque filter parameters. The system feeds back the detected load information to the torque control mechanism, creating a closed-loop control system that automatically adjusts torque delivery characteristics to maintain drivability while responding to driver intentions.
Data Source
AI summary
A method and a system for correcting an engine torque based on a vehicle load may include: determining whether a vehicle load determination condition is satisfied continuously for a predetermined maintaining time, determining an average engine torque for the predetermined maintaining time if the vehicle load determination condition is satisfied continuously, determining whether the average engine torque is larger than a predetermined engine torque, determining a ratio of the average engine torque and the predetermined engine torque if the average engine torque is larger than the predetermined engine torque, determining a correction factor using the ratio of the average engine torque and the predetermined engine torque, and determining the engine torque using the correction factor and a predetermined normal torque filter.