Horizontal Motor Damper Layout for EV Axle Oscillation Control
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Solution Overview
Problem
The addition of electric motors to vehicle axles causes modal responses and oscillations, leading to reduced operator comfort due to non-smooth road conditions.
Innovation Solution
A suspension system incorporating a horizontal damper operably coupled to the vehicle's frame and electric motor, in addition to vertical dampers, to mitigate oscillations and improve comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If electric motors are added to vehicle axles to propel the vehicle, then vehicle propulsion capability is improved, but modal response and oscillations increase leading to reduced operator comfort
Solution Approach 1:
The patent introduces a horizontal damper oriented perpendicular to the traditional vertical dampers, adding a new dimensional approach to damping. This horizontal orientation directly addresses the modal response caused by electric motor addition without interfering with the vertical suspension function, thereby reducing oscillations while maintaining propulsion capability.
Solution Approach 2:
The suspension system is segmented into separate functional components: vertical dampers for suspension and a horizontal damper for modal response control. This segmentation allows each component to specialize in addressing specific issues - vertical dampers handle road irregularities while the horizontal damper specifically targets the oscillations induced by electric motor addition.
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
The horizontal damper effectively reduces modal responses and oscillations, enhancing operator comfort by dampening vibrations and limiting vehicle oscillations.
Implementation Method 1
a horizontal damper extending substantially parallel to the driving surface. A first distal end of the horizontal damper may operably couple to the frame, and a second distal end of the horizontal damper may operably couple to the electric motor or the axle
Data Source
AI summary
The suspension system may include an axle operably coupled to a frame of the vehicle, an electric motor operably coupled to the axle to propel the vehicle, one or more wheels operably coupled to the axle, at least one vertical damper extending substantially perpendicular to a driving surface and operably coupled to the frame and the axle, and a horizontal damper extending substantially parallel to the driving surface. A first distal end of the horizontal damper may operably couple to the frame, and a second distal end of the horizontal damper may operably couple to the electric motor.