Vehicle Test System Road Load Verification
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle test systems face issues with user errors during road load setting in dynamometers, leading to inappropriate load settings and potentially useless tests, as users cannot verify or correct the calculated road loads.
Innovation Solution
A vehicle test system that includes an actual running data acquisition part, a road load calculation part, a road load data setting part, and an output part to automatically calculate and set road loads in a dynamometer, preventing user errors by allowing users to view and verify the road loads before setting, and ensuring compliance with predetermined regulations and environmental conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a controller automatically calculates and sets road load without user intervention, then user erroneous operations are prevented, but users cannot verify or correct inappropriate road load values
Solution Approach 1:
The system displays the calculated road load value to the user before final setting, providing visual feedback that allows verification and correction. The user can confirm or modify the automatically calculated value through a display interface, combining automated calculation with human oversight.
2Ease of operation
If manual road load setting is used, then users can verify and correct values, but user errors and inappropriate settings occur
Solution Approach 1:
The controller automatically performs the road load calculation function that would otherwise require manual user input and computation. The system serves itself by calculating the road load based on stored vehicle parameters and test conditions, eliminating the need for users to manually compute or input these values.
3Measurement precision
If road load is calculated using coast-down method with multiple parameters, then measurement precision is improved, but device complexity and operation difficulty increase
Solution Approach 1:
Vehicle parameters necessary for road load calculation (mass, inertia moment, aerodynamic characteristics) are pre-stored in the controller's memory. This preliminary preparation eliminates the need for complex real-time measurements and calculations during the actual road load setting process.
Solution Approach 2:
The system replaces complex manual calculation and measurement procedures with automated electronic computation. The controller uses stored parameters and sensor data to automatically compute road load values, substituting manual mechanical measurement processes with electronic calculation systems.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
In order to prevent the occurrence of a user's erroneous operation as well as preventing an inappropriate road load from being set in a dynamometer, a vehicle test system 100 that tests the performance of a vehicle V or a part of the vehicle V is adapted to include: a dynamometer 1 adapted to provide a load to the vehicle V or the part of the vehicle V; an actual running data acquisition part 61 adapted to acquire actual running data from an actual running vehicle V' running on a road; a road load calculation part 62, 41 adapted to, on the basis of the actual running data, calculate a road load used to test the performance of the vehicle V or the part of the vehicle V; a road load data setting part 43 adapted to set the road load in the dynamometer 1; and an output part 44 adapted to, before the setting in the dynamometer 1, viewably output the road load to a user.