Hub Motor Steering Integration for Drivetrain Volume Reduction
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Solution Overview
Problem
Current vehicle designs face limitations in efficiency and space utilization due to the need for separate engines in hybrid vehicles, leading to increased drivetrain volume, reduced interior space, and compromised handling and traction in inclement conditions.
Innovation Solution
A motor system with a rotor and stator assembly that utilizes multiple winding sets to achieve variable operating ranges, allowing for efficient power transmission and energy storage in a compact form, integrated into the wheel hub to reduce drivetrain volume while maintaining maneuverability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If separate engines are used in hybrid vehicles, then power transmission efficiency is improved, but drivetrain volume increases and interior space decreases
Solution Approach 1:
The patent combines the motor and steering functions into a single integrated hub assembly, merging previously separate components (motor, steering mechanism, wheel hub) into one compact unit. This consolidation reduces overall drivetrain volume while maintaining the power transmission efficiency of electric motors.
Solution Approach 2:
The hub motor assembly serves multiple functions simultaneously: it provides power transmission to the wheel, enables steering control, and supports suspension functions. This multi-functionality eliminates the need for separate engines and steering mechanisms, reducing drivetrain volume while preserving power transmission efficiency.
2Volume of moving object
If drivetrain volume is decreased, then interior space increases, but vehicle handling and traction may degrade
Solution Approach 1:
The patent incorporates variable operating ranges with multiple winding sets that can dynamically adjust motor characteristics based on operating conditions. This dynamic adaptability ensures optimal handling and traction performance across different speeds and loads, preventing degradation despite reduced drivetrain volume.
Solution Approach 2:
The motor system changes operational parameters through multiple winding sets configured for different operating ranges. By adjusting electrical parameters (winding connections, current distribution) based on speed and load conditions, the system maintains reliable handling and traction while operating within a compact drivetrain configuration.
3Use of energy by moving object
If separate engines are used for different speed conditions, then power transmission efficiency is improved, but device complexity increases
Solution Approach 1:
The hub motor assembly performs multiple functions (power transmission, steering, suspension) that would traditionally require separate components. This multi-functionality reduces device complexity by consolidating systems while maintaining the efficiency benefits of electric power transmission across different operating conditions.
Solution Approach 2:
The motor system dynamically adapts to different operating conditions through variable operating ranges and multiple winding sets, eliminating the need for separate engines for different speed conditions. This dynamic capability reduces device complexity by using a single adaptable motor instead of multiple fixed-function engines.
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 solution decreases vehicle drivetrain volume, increases interior space, and enhances maneuverability without degrading handling or traction, even in adverse environmental conditions.
Implementation Method 1
a motor having a rotor assembly and a stator assembly to rotatably drive the rotor assembly to multiple variable operating ranges
Data Source
AI summary
Embodiments of the invention describe vehicles including a wheel (e.g., a front wheel or wheels), a wheel hub, a motor included in the wheel hub to transmit power to the wheel, one or more rolling bearings to support the wheel hub and having one or more rolling elements to enable rolling of the wheel, and a steering axle placed within the wheel hub for steering the wheel. Embodiments also describe a wheel (e.g., a rear wheel or wheels), a wheel hub, a motor included in the wheel hub to transmit power to the wheel, and a swing arm assembly having a first and a second end, the first end rotatably coupled to a steering axle, the second end coupled to the motor. As described below, embodiments of the invention decrease volume necessary for a vehicle's drivetrain, while not adversely affecting the potential for vehicle interior volume and vehicle maneuverability.