Friction Plate Test Bench for Realistic Drivetrain Simulation
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Solution Overview
Problem
Current test bench setups for drive trains are overly rigid, leading to a falsification of measurement results when attempting to realistically simulate road conditions, particularly when testing gearboxes.
Innovation Solution
A test bench arrangement that includes a drive barrel with a frictional contact plate in contact with a tire wheel, allowing for realistic simulation of road conditions by transmitting torque and speed, and enabling the simulation of various load scenarios, including different coefficients of friction and wheel slip, to accurately test drive train components under realistic operating conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a rigid test bench setup is used to test drive train components, then the structural stability and measurement consistency are improved, but the realism of road condition simulation deteriorates
Solution Approach 1:
The test bench incorporates a friction plate contact system that allows dynamic interaction between the drive barrel and tire wheel. The friction contact enables realistic simulation of road conditions including wheel slip and varying friction coefficients, while the overall structure remains stable for accurate measurements.
Solution Approach 2:
A friction plate is introduced as an intermediary element between the drive barrel and the tire wheel. This friction plate allows for realistic torque transmission and simulation of road surface conditions, bridging the gap between the rigid test bench structure and the need for realistic road condition simulation.
2Reliability
If a friction plate contact system is introduced to simulate road conditions, then the realism of load simulation is improved, but the device complexity increases
Solution Approach 1:
The friction plate contact system serves multiple functions: it transmits torque from the drive barrel to the tire wheel, simulates various road surface conditions through adjustable friction coefficients, and enables realistic wheel slip simulation. This multi-functionality reduces the need for additional specialized components.
Solution Approach 2:
The system allows for parameter changes in friction coefficient by adjusting the friction plate contact conditions. This enables simulation of different road surfaces (dry, wet, icy) without changing the physical structure of the test bench, thereby managing complexity while maintaining realism.
3Power
If the drive barrel directly contacts the tire wheel, then the torque transmission efficiency is improved, but the ability to simulate wheel slip and varying friction conditions deteriorates
Solution Approach 1:
The friction plate acts as an intermediary between the drive barrel and tire wheel, maintaining efficient torque transmission while enabling simulation of wheel slip and varying friction conditions. The friction contact allows controlled slippage that would not be possible with direct rigid contact.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This setup allows for the realistic testing of drive train components, including transmissions and braking systems, by simulating real-world loads and conditions, providing accurate measurement of forces and torques, and enabling the evaluation of various operational scenarios such as cornering, slipping, and parking lock engagement.
Implementation Method 1
a friction plate (7), which is in contact with a rotatably mounted tire wheel (2), with the tire wheel (2) being connected via an output shaft (3) to a drive unit (4, 11)
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
The invention relates to a method for testing at least a part of a drivetrain of a vehicle, having at least one rotatable drive drum (1) which can be driven by means of a drive (5), wherein the drive drum (1) has a frictional engagement plate (7), wherein the frictional engagement plate (7) bears against a rotatably mounted tyred wheel (2), wherein the tyred wheel (2) is connected to an output shaft (3), wherein the output shaft (3) is connected to a rotationally fixedly mounted drive unit (4, 11), wherein the drive drum (1) is formed with the frictional engagement plate (7) so as to exchange torque with the tyred wheel (2). The invention also relates to a method for controlling the apparatus.