Vehicle Steering Actuator Power Management for Reliable Intervention
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Solution Overview
Problem
Existing driver assistance systems for motor vehicles face challenges in executing desired steering interventions due to unreliable power supply and unsuitable steering configurations, particularly in situations requiring significant steering motions, which can impact driving comfort and safety.
Innovation Solution
A method that predicts predefined driving situations based on relevant criteria and adjusts operating parameters, such as power output and steering angles, to ensure reliable execution of steering interventions by anticipating and preparing the vehicle's power supply and steering state before the intervention occurs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the electric steering actuator consumes energy to provide additional steering torque, then the steering intervention can be executed, but the on-board power supply may not have sufficient power available
Solution Approach 1:
The system predicts upcoming steering interventions based on driving situation analysis and pre-adjusts the generator's power output and other operating parameters before the intervention occurs. This preliminary action ensures that sufficient power is available when needed without requiring continuous high power consumption.
Solution Approach 2:
The generator's power output is made dynamically adjustable based on predicted steering intervention requirements. The system continuously monitors driving situations and adapts the power supply configuration in real-time, switching between different power output levels as needed.
2Reliability
If the generator power output is increased in advance to ensure power availability, then power supply reliability improves, but energy is wasted when steering intervention is not needed
Solution Approach 1:
The system performs preliminary prediction of steering interventions using driving situation analysis and only increases generator power output when a steering intervention is anticipated. This avoids continuous high power output and reduces energy waste during normal driving conditions.
Solution Approach 2:
The system continuously monitors driving situations and feedback from the prediction algorithm to dynamically adjust generator power output. When steering intervention is not predicted, the generator operates at lower power levels, and only increases output when the prediction system detects an upcoming intervention scenario.
3Adaptability or versatility
If the steering angle at axles is configured for opposite direction steering, then certain driving maneuvers are enabled, but steering intervention cannot be executed promptly when same direction steering is required
Solution Approach 1:
The system predicts when a steering intervention will be needed and pre-adjusts the steering angle configuration of the axles to the appropriate state (same direction or opposite direction) before the intervention occurs. This ensures that the steering mechanism is already in the correct configuration when the intervention is executed, enabling prompt response.
Solution Approach 2:
The steering angle configuration of the axles is made dynamically adjustable based on predicted driving situations. The system can switch between different steering configurations (opposite direction for parking, same direction for evasion) in real-time based on the predicted intervention type.
Data Source
AI summary
The invention relates to a method of operating a motor vehicle, in which, when at least one predefined driving situation is present, an assigned steering intervention is carried out by a driver assistance system. In advance of such steering interventions, predictions relating to the occurrence of the at least one predefined driving situation are produced as a function of at least one predefined criterion and, as a function of the prediction, at least one operating parameter of the motor vehicle, which is relevant for the steering intervention, is set, before the steering intervention takes place, to a predefined value which is necessary for carrying out the steering intervention. This ensures that when the driving situation takes place, the motor vehicle is in an operating state in which the steering intervention can be executed without interference.