Dual Motor Vehicle Propulsion Mechanism for Reverse Maneuvering
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Solution Overview
Problem
Riders of vehicles like motorcycles face difficulty in moving them in reverse due to the weight and design of the drive mechanism, which often requires manual effort and is challenging at slower speeds, especially during parking and trailering maneuvers.
Innovation Solution
A vehicle design incorporating a chassis with a traction device, a first motor for forward motion, and a second motor that can power the traction device to propel the vehicle in both forward and reverse directions, with a transmission system allowing selective power transfer and a controller to limit the operation of the second motor to when the internal combustion engine is operating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a single motor with transmission is used for forward motion, then the vehicle can achieve forward movement, but the rider must manually push the vehicle for reverse movement increasing rider effort
Solution Approach 1:
The drive system is segmented into two independent motors: a first motor for forward motion and a second motor for reverse motion. This segmentation allows each motor to be optimized for its specific direction while eliminating the need for manual pushing, directly resolving the contradiction between ease of reverse operation and device complexity.
Solution Approach 2:
The transmission system is designed to work with both motors, providing universal functionality. The transmission can selectively transfer power from either the first motor or the second motor to the traction device, allowing a single transmission system to handle both forward and reverse propulsion without requiring separate mechanisms.
2Ease of operation
If the transmission provides only forward movement, then the drive mechanism is simple, but the rider must manually push for reverse movement increasing effort and difficulty
Solution Approach 1:
The transmission system is made dynamic by enabling it to selectively engage with either the first motor or the second motor based on the desired direction of movement. This dynamic configuration allows the transmission to adapt its power transfer path, providing reverse movement capability without requiring a completely different transmission system.
3Adaptability or versatility
If a dual motor system is added for reverse movement, then the vehicle can move in both directions, but the device complexity increases
Solution Approach 1:
The two motors are merged into a unified drive system that shares common components including the transmission and chassis mounting structure. Both motors are supported by the same chassis and connect to the same transmission system, allowing them to function as an integrated dual-motor system rather than two separate vehicles, thereby reducing overall complexity.
Solution Approach 2:
The transmission system serves a universal function by being capable of receiving power input from either motor and transferring it to the traction device. This multi-functionality reduces the need for separate transmission systems for each motor, thereby reducing device complexity while maintaining bidirectional capability.
4Ease of operation
If the second motor is added for reverse movement, then the vehicle can propel itself in reverse, but the weight of the vehicle increases
Solution Approach 1:
The second motor shares mounting structures and support components with the first motor, merging their installation requirements. By combining the mounting infrastructure, the weight penalty of adding the second motor is minimized, as the same structural elements support both motors rather than requiring separate support systems.
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
Enables effortless movement in both forward and reverse directions at limited speeds, reducing rider effort and improving control during parking and trailering by utilizing a dual motor system within the vehicle's transmission mechanism.
Implementation Method 1
a first motor supported by the chassis; and a transmission adapted to selectively transfer power from the first motor to the traction device
Implementation Method 2
a second motor supported by the chassis that powers the traction device to propel the chassis in at least one of a substantially rearward direction and a substantially forward direction
Data Source
AI summary
A second drive mechanism for a vehicle. The second drive mechanism includes a motor independent of the motor that propels the vehicle. The second drive mechanism may selectively engage the transmission to propel the vehicle in either forward or reverse direction at limited speeds. In addition, the second drive mechanism may include a safety catch configured to ensure the transmission of the vehicle remains in neutral as the mechanism propels the vehicle in forward or reverse direction at limited speeds.