Motorcycle Test Stand with Movable Frame for Accurate Drive Chain Load Simulation
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Solution Overview
Problem
Existing motorcycle test stands fail to accurately simulate real-world loads on the drive chain and forces during testing, leading to errors due to the absence of realistic load simulation and unwanted vibrations from roller test stands.
Innovation Solution
A motorcycle test stand with a first connecting point at the swing arm bearing and a second connecting point to the motorcycle frame, allowing the dynamometer to apply forces similar to those experienced during real driving, including uphill scenarios, via an actuator, while the motorcycle is movable relative to the dynamometer, eliminating the need for a fixed rear swing arm.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the motorcycle is tested on roller test stands, then power measurement can be accomplished, but losses due to tire friction and wheel slipping occur resulting in errors in evaluation
Solution Approach 1:
The invention extracts the motorcycle wheels and tires from the test setup by removing them entirely. The motorcycle is mounted on the test stand without wheels, and the drive chain is directly connected to the dynamometer. This eliminates the energy losses associated with tire friction and wheel slipping on rollers, allowing for accurate power measurement of the drive train alone.
2Measurement precision
If the rear wheel is removed and the drive chain is connected via transmission to a dynamometer, then power measurement can be accomplished, but the real load on the drive chain cannot be simulated
Solution Approach 1:
The invention makes the motorcycle frame movable relative to the dynamometer along the direction of the drive chain. This dynamic setup allows the application of realistic forces to the motorcycle frame during testing, simulating actual driving conditions such as acceleration, deceleration, and load changes. The movable frame enables the drive chain to experience genuine operational loads while being measured by the dynamometer.
3Reliability
If the motorcycle is fixed in a receptacle with connecting points to the frame, then realistic forces can be applied to simulate driving conditions, but the device complexity increases
Solution Approach 1:
The receptacle structure serves multiple functions simultaneously: it provides mechanical support for the motorcycle frame, enables controlled movement along the drive chain direction, applies realistic forces during testing, and positions the motorcycle correctly relative to the dynamometer. This multi-functional design achieves realistic load simulation without proportionally increasing device complexity.
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 enables accurate simulation of various driving maneuvers and loading conditions, reducing errors from wheel slipping and vibrations, allowing for early testing of the drive chain's behavior and interaction with other components without costly prototype development.
Implementation Method 1
The dynamometer is connected for power measurement directly via the motorcycle sprocket
Implementation Method 2
forces are applied to the motorcycle by an actuator
Implementation Method 3
the motorcycle frame is rotatable around the first connecting point in the receptacle
Data Source
AI summary
A motorcycle test stand comprises at least one dynamometer configured and arranged to be connected to a drivetrain of a motorcycle to be tested, and a receptacle configured and arranged for receiving a motorcycle frame, and a base fixing the dynamometer and the receptacle relative to one another. The receptable has first and second connecting points configured and arranged to be coupled to the motorcycle frame.