Vehicle Test System Using Electronic Pedal Simulation
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Solution Overview
Problem
Current vehicle test systems face challenges in consistently reproducing driving scenarios due to driver fatigue and deviations in test results, especially in eco-friendly vehicles, and require lengthy installation and calibration of robot drivers, limiting their use to dynamometer environments and increasing costs.
Innovation Solution
A vehicle test system and method that uses a test controller to determine and convert pedal sensor command values corresponding to a vehicle speed profile, allowing for direct signal transmission to the power train controller without physical pedal manipulation, enabling convenient and accurate reproduction of driving environments without occupying the driver seat.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a robot driver is used to eliminate driver fatigue and reduce test deviations, then test reliability is improved, but installation time and device complexity increase
Solution Approach 1:
The patent replaces the mechanical robot driver system with an electronic control system that directly interfaces with the vehicle's powertrain controller. Instead of using physical robot legs to manipulate pedals, the system sends electronic control signals through the OBD interface to simulate accelerator and brake pedal operations, thereby eliminating the need for mechanical installation while maintaining test reliability
Solution Approach 2:
The patent introduces an intermediary test controller that acts as a mediator between the testing system and the vehicle's powertrain controller. This controller receives test parameters and generates appropriate control signals through the OBD interface, eliminating the need for direct mechanical connection while enabling accurate reproduction of driving conditions
2Reliability
If a robot driver is installed to reduce test deviations, then test reliability is improved, but device complexity and costs increase
Solution Approach 1:
The patent replaces the complex mechanical robot driver system with a simplified electronic control system. Instead of mechanical linkages, motors, and calibration mechanisms, the system uses software-based control algorithms that communicate electronically with the vehicle's existing powertrain controller through the OBD interface, dramatically reducing device complexity
Solution Approach 2:
The patent creates a virtual copy of the driver's operational patterns through control algorithms that reproduce accelerator and brake pedal manipulation based on vehicle speed profiles. Instead of physically replicating a driver's actions with mechanical components, the system digitally models and executes the same control functions, reducing complexity while maintaining test fidelity
3Reliability
If a robot driver is used to reduce test deviations, then test reliability is improved, but adaptability to different test environments is reduced
Solution Approach 1:
The patent creates a universal test system that can operate in multiple environments (dynamometer and real-road conditions) by using electronic communication protocols that are compatible with various vehicle types and test settings. The system adapts to different environments through software configuration rather than mechanical reconfiguration, enabling versatile application across test scenarios
Solution Approach 2:
The patent implements a dynamic control system that can adapt its operation mode based on the test environment. The system can switch between different control strategies and parameter sets depending on whether it is operating on a dynamometer or in real-road conditions, providing flexibility and adaptability without requiring physical reconfiguration
4Ease of operation
If driver manipulation is used to follow vehicle speed profile, then ease of operation is maintained, but test precision deteriorates due to driver fatigue
Solution Approach 1:
The patent implements a self-service control system where the test controller automatically determines and executes the appropriate accelerator and brake pedal commands based on the vehicle speed profile. The system serves itself by autonomously calculating the required manipulation signals without human intervention, eliminating fatigue-related errors while maintaining operational simplicity through automated control algorithms
Data Source
AI summary
A test system disposed in a vehicle to repetitively reproduce a driving situation based on a predetermined vehicle speed and a method for controlling, may include determining, by a test controller, at least one of a first value representing an accelerator pedal sensor (APS) command value corresponding to a vehicle speed profile in a specific mode or a second value representing a brake pedal sensor (BPS) command value corresponding to the vehicle speed profile when the vehicle speed profile is determined, converting, by the test controller, at least one of the determined first value or the determined second value, and sending the converted voltage signal from the test controller to a power train controller.