Electric Vehicle Chassis Transverse Carrier Design
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Solution Overview
Problem
Electrically powered vehicles require unique solutions for component packaging due to differences in external dimensions and couplings compared to conventional internal combustion engine vehicles, necessitating innovative chassis designs that accommodate electrochemical energy accumulators or fuel cell stacks.
Innovation Solution
A chassis for electric vehicles featuring a wheel suspension with longitudinal control arms, a battery housing, a transverse carrier with a hollow profile, torsion springs, and electrically controllable actuators that connect the transverse carrier to the torsion springs, allowing for a compact and adaptable design that optimizes space for the propulsion battery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional chassis design is used in electrically powered vehicles, then the packaging of components becomes difficult due to differences in external dimensions and couplings, but redesigning the chassis increases device complexity
Solution Approach 1:
The chassis is divided into modular components including a battery housing, transverse carrier, and wheel suspension assemblies. The transverse carrier serves as a separate module that connects the battery housing to the wheel suspension, allowing independent optimization of each component for electric vehicle requirements while simplifying the overall system integration
Solution Approach 2:
The transverse carrier performs multiple functions: it rigidly connects to the battery housing, rotatably supports the longitudinal control arms of the wheel suspension, and provides mounting points for torsion springs and electrically controllable actuators. This multi-functionality reduces the number of separate components needed in the chassis design
2Stability of the object's composition
If the transverse carrier rigidly connects to the battery housing and supports wheel suspension components, then structural stability is improved, but the installation space for the electrical energy source becomes constrained
Solution Approach 1:
The torsion springs and electrically controllable actuators are disposed within the hollow profile cavity of the transverse carrier. This nesting arrangement allows these suspension components to be housed inside the transverse carrier structure rather than occupying separate external space, thereby preserving maximum installation volume for the battery housing while maintaining structural integrity
3Volume of moving object
If torsion springs and actuators are disposed within the transverse carrier cavity, then space utilization is improved, but manufacturing precision requirements increase
Solution Approach 1:
The transverse carrier rotatably supports the longitudinal control arms rather than rigidly fixing them, allowing for dynamic movement and adjustment. The torsion springs provide elastic compliance that accommodates manufacturing tolerances and thermal expansion, reducing the stringency of precision requirements while maintaining proper suspension geometry and function
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 design achieves a compact and comfortable driving experience by independently stabilizing the wheel suspensions, accommodating the electrical energy source efficiently, and enabling optimal installation space adaptation for electric propulsion systems.
Implementation Method 1
A torsion spring disposed within the cavity connects to at least one of the first and second longitudinal control arms and to said transverse carrier
Implementation Method 2
An electrically controllable actuator disposed within the cavity couples the transverse carrier to the torsion spring
Data Source
AI summary
A chassis for an electrically powered vehicle, including a front wheel suspension and a rear wheel suspension, each having longitudinal control arms arranged on both sides and a torsion spring actively connected to the longitudinal control arms. The chassis includes a battery housing receiving a propulsion battery. A front transverse carrier extends between the respective longitudinal control arms of the front wheel suspension, and a rear transverse carrier extends between the respective longitudinal control arms of the rear wheel suspension. The respective transverse carriers are rigidly connected to the battery housing and couple the longitudinal control arms and the torsion spring.