Torque Vectoring Gear Layout for Compact Vehicle Packaging
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Solution Overview
Problem
Existing torque vectoring devices for vehicles require significant physical space, are complex, and have a high number of components, limiting their applicability and efficiency.
Innovation Solution
A torque vectoring device featuring a pair of planetary gear sets with a common ring wheel, connected to an electrical motor and differential mechanism via chain or belt drives, reducing physical space and complexity while maintaining efficiency through a reduction gear for enhanced control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional torque vectoring devices are used, then torque distribution control is achieved, but the device occupies significant physical space and increases vehicle complexity
Solution Approach 1:
The patent merges two planetary gear sets into a compact arrangement where they share a common ring gear and are positioned side-by-side rather than in series. This integration reduces the overall number of components and simplifies the mechanical structure while maintaining the torque vectoring function, directly addressing the complexity issue.
Solution Approach 2:
The patent transitions from a longitudinal arrangement of components to a transverse arrangement where the planetary gear sets are positioned side-by-side perpendicular to the output shaft. This dimensional change allows the device to fit within the wheel well space rather than requiring extensive longitudinal space, improving adaptability to different vehicle platforms.
2Adaptability or versatility
If traditional torque vectoring devices are used, then torque distribution control is achieved, but the device requires significant longitudinal space
Solution Approach 1:
The patent repositions the planetary gear sets from a longitudinal arrangement to a transverse arrangement side-by-side perpendicular to the output shaft. This dimensional reconfiguration reduces the longitudinal footprint of the device, allowing it to fit within the wheel well space of various vehicle platforms without requiring extensive length along the drivetrain axis.
Solution Approach 2:
The patent nests the two planetary gear sets within a compact housing where they share common components such as the ring gear and mounting structure. This nested arrangement allows both gear sets to occupy overlapping spatial volumes, significantly reducing the overall envelope of the device and enabling installation in space-constrained vehicle applications.
3Measurement precision
If more gear engagements are used, then torque control precision is improved, but device efficiency decreases due to more components
Solution Approach 1:
The patent combines the torque control function into a single integrated planetary gear mechanism rather than using multiple separate gear stages. This merger maintains precise torque control through the inherent mechanical advantage of the planetary system while eliminating the energy losses that would occur through multiple sequential gear engagements, thus improving overall efficiency.
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 reduces the physical space required, simplifies the device, and increases efficiency by allowing more flexible packaging and improved torque control, enabling the device to be fitted into a wider range of vehicles while enhancing driving characteristics and safety.
Implementation Method 1
the connection between the first planetary gear set and the cage is formed by a chain drive or a belt drive
Implementation Method 2
the connection between the first planetary gear set and the cage is formed by a chain drive or a belt drive
Implementation Method 3
a pinion gear an output shaft of the electric motor is in engagement with a first reduction gear, the reduction gear rotating with a first sun gear of the first planetary gear set
Implementation Method 4
an electrical motor for distributing torque between the wheels of a front and/or a rear axle of a vehicle, wherein the electrical motor is connected to a differential mechanism via a first planetary gear set and a second planetary gear set
Data Source
Figure 1
AI summary
A torque vectoring device for a vehicle is provided, comprising an electrical motor (110) being connected to a differential mechanism (20) via a first planetary gear set (120) and a second planetary gear set (130), said planetary gear sets (120, 130) sharing a common ring wheel (126), wherein the first planetary gear set (120) is connecting the electrical motor (110) to a cage (22) of the differential (20), and the second planetary gear set (130) is connecting the electrical motor (110) to an output shaft (24), and wherein the rotational axis (R) of the first planetary gear set (120) and the second planetary gear set (130) is arranged remote from the output shaft (24).