Dynamic Driving Style Evaluation for Fuel Efficiency
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Solution Overview
Problem
Current motor vehicle driving style evaluation systems, such as eco:Drive, while effective, do not fully account for dynamic mission-dependent factors and auxiliary braking systems in calculating fuel consumption reduction, leading to suboptimal fuel efficiency and CO2 emission reduction, especially in varying driving conditions.
Innovation Solution
A motor vehicle driving style evaluation system that incorporates on-board and off-board data processing using a Driving Style Evaluation Index (DSEI) computed from Fuel Economy Index (FEI), Auxiliary Brake Usage Index (ABUI), and Degree of Difficulty Index (DoDI), with dynamic weighting coefficients based on real-time mission data and statistical analysis, to provide personalized feedback for improved fuel efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If traditional driving style evaluation systems are used, then basic fuel consumption monitoring is achieved, but dynamic mission-dependent factors and auxiliary braking systems are not fully accounted for, leading to suboptimal fuel efficiency
Solution Approach 1:
The system implements dynamic weighting coefficients that adapt in real-time based on mission-dependent factors such as driving conditions, vehicle load, and environmental parameters. This allows the evaluation system to dynamically adjust the importance of different driving parameters (acceleration, braking, gear selection) according to the specific mission context, thereby improving both fuel efficiency and measurement precision simultaneously
Solution Approach 2:
The evaluation system segments the overall fuel consumption into multiple independent components: base fuel consumption, dynamic mission-dependent factors, and auxiliary braking system contributions. Each segment is calculated and weighted separately, allowing for precise measurement of each factor's impact on total fuel efficiency while maintaining comprehensive evaluation accuracy
2Measurement precision
If comprehensive data processing is implemented, then accurate fuel consumption evaluation is achieved, but system complexity increases
Solution Approach 1:
The system introduces an intermediary computational layer that processes raw sensor data through standardized algorithms to generate intermediate evaluation metrics (base fuel consumption, mission-dependent factors, auxiliary braking contributions). This intermediary layer simplifies the overall system architecture by breaking down complex data processing into manageable stages while maintaining high evaluation accuracy
Solution Approach 2:
The system transforms raw sensor measurements into normalized evaluation parameters with standardized units and scales. By changing the parameter representation from raw sensor values to normalized metrics, the system reduces computational complexity while preserving measurement precision, making the evaluation process more manageable without sacrificing accuracy
Data Source
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AI summary
A driving style evaluation system (1) for a motor vehicle (2), configured to receive and process motor vehicle-related data and motor vehicle mission-related data to compute a Driving Style Evaluation Index (DSEI) indicative of the driving style of a motor vehicle driver during a motor vehicle mission in relation to a motor vehicle fuel consumption, based on the following summary index: Fuel Economy Index (FEI), which is indicative of the driving style of the motor vehicle driver from the fuel saving perspective, and is computed based on pre-summary indices computed based on respective partial indices in turn computed based on a combination of the following physical quantities which affect the motor vehicle fuel consumption: time interval, ending with a motor vehicle stop, during which the motor vehicle speed reduction is mainly due to a combination of a gas pedal release and a gear downshift, possibly with operation of at least one motor vehicle braking system only during the final part of the manoeuvre; engine speed and torque fluctuations within preset time intervals; time elapsed between a gas pedal release and operation of at least one motor vehicle braking system; time during which at least one motor vehicle braking system is operated; amount of energy dissipated by at least one motor vehicle braking system; engine power and instantaneous fuel consumption in different gears; and time interval between two consecutive gear shifts; and wherein the pre-summary and partial indices are weighted by means of respective dynamic weighting coefficients, each of which is computed based on a respective motor vehicle mission-independent weight, which is indicative of the influence that the physical quantities based on the which the Fuel Economy Index (FEI) is computed have on the overall fuel consumption reduction, and based on a respective motor vehicle mission-dependent benefit, which represents an evaluation of the benefit that the Fuel Economy Index (FEI) provides in the driving style evaluation during the motor vehicle mission.