Steer-by-Wire Actuator Energy Reduction via Driving Situation Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Vehicles with single wheel steering actuators in steer-by-wire systems have a higher energy demand and consumption compared to central actuators, as they must provide forces for both symmetric and asymmetric external forces, leading to increased power consumption.
Innovation Solution
A method implemented in a vehicle with a steer-by-wire steering system using multiple single wheel steering actuators, where a vehicle sensor system identifies specific driving situations to dynamically adjust and reduce the power consumption of these actuators, potentially deactivating them in non-critical conditions to minimize energy usage, while maintaining essential steering functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If single wheel steering actuators are used in steer-by-wire systems, then steering functionality is maintained, but energy consumption increases due to the need to provide forces for both symmetric and asymmetric external forces
Solution Approach 1:
The patent applies dynamics by dynamically adjusting the actuation of wheel steering angle actuators based on detected driving situations. The control device monitors driving situations and selectively actuates actuators only when necessary, transitioning between active and inactive states to optimize energy consumption while maintaining steering functionality when needed
Solution Approach 2:
The patent changes the operational parameters of the wheel steering angle actuators by adjusting their activation state based on driving situation parameters. The control device modifies actuator behavior from continuous operation to selective operation based on detected conditions, thereby reducing energy consumption while preserving steering capability
2Reliability
If wheel steering angle actuators are continuously actuated to maintain desired target position, then steering control is precise, but energy demand increases
Solution Approach 1:
The patent applies partial action by actuating wheel steering angle actuators only partially and selectively based on driving situations rather than continuously. The control device determines when actuator intervention is necessary and limits actuation to those specific instances, reducing overall power demand while maintaining adequate steering control precision
3Adaptability or versatility
If multiple wheel steering angle actuators are used for individual wheel control, then steering versatility is improved, but overall energy consumption increases
Solution Approach 1:
The patent applies segmentation by dividing the steering control function into multiple independent wheel steering angle actuators, each capable of individual actuation. The control device selectively activates specific actuators based on driving situations, allowing versatile steering control while minimizing the number of simultaneously active actuators to reduce overall energy consumption
Data Source
AI summary
A method is for reducing an energy demand and/or energy consumption by a vehicle, in particular a motor vehicle. The vehicle includes a steering system having at least two wheel steering angle actuators for changing a respective wheel steering angle of a vehicle wheel on an individual wheel basis, and a vehicle sensor system for driving situation recognition. In at least one operating state, in which a predefined driving situation is identified using the vehicle sensor system, a power consumption by at least one wheel steering angle actuator is reduced in order to reduce the energy demand and/or energy consumption, in particular such that the power consumption by the at least one wheel steering angle actuator is below a power consumption by the at least one wheel steering angle actuator planned for in the identified predefined driving situation.