Vehicle Stop-State Arbitration for Faster Startup Response
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Solution Overview
Problem
In vehicles equipped with multiple driving assistance systems, abnormal system behavior can cause the requested acceleration for maintaining a stopped state to remain constant, leading to delayed vehicle startup when another system or the driver attempts to start the vehicle.
Innovation Solution
A vehicle control device with a processor that receives acceleration requests from multiple systems, prioritizes the selection of acceleration values, and sets a lower priority for the first requested value when predetermined information is acquired, ensuring that the second requested value is preferentially selected to prevent the vehicle from being held in a stopped state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the requested acceleration for maintaining a stopped state is selected based on a predetermined selection criterion, then the vehicle can maintain a stopped state reliably, but the start responsiveness of the vehicle deteriorates when another system requests vehicle startup
Solution Approach 1:
The patent applies dynamics by making the priority of the first requested acceleration value changeable based on vehicle state. When the vehicle is in a stopped state, the priority is lowered to allow other systems to override and initiate startup. This dynamic priority adjustment resolves the contradiction between reliably maintaining the stopped state and enabling responsive startup when needed.
Solution Approach 2:
The patent changes the parameter of priority assignment for the first requested acceleration value based on system-detected predetermined information. By modifying this parameter (priority level) according to vehicle state and system conditions, the system can switch between maintaining the stopped state and allowing startup, thus resolving the contradiction between reliability and start responsiveness.
2Stability of the object's composition
If the requested acceleration value remains constant due to system abnormality, then the system maintains its requested state, but the vehicle startup is delayed when another system or the driver attempts to start the vehicle
Solution Approach 1:
The patent makes the priority of the first requested acceleration value dynamic rather than fixed. When predetermined information indicating abnormality or startup request is detected, the priority is automatically lowered, allowing the system to transition from a stable stopped state to a responsive startup state, thereby reducing startup delay time while maintaining stability during normal operation.
Solution Approach 2:
The patent applies preliminary anti-action by proactively lowering the priority of the first requested acceleration value when predetermined information is detected, before the startup delay actually occurs. This preemptive adjustment prevents the abnormal constant value from causing startup delays, resolving the contradiction between stability and time loss.
Data Source
AI summary
A vehicle control device includes a processor. The processor is configured to receive a first requested value of acceleration acting on a vehicle from a first system configured to request holding a stopped state of the vehicle. The processor is configured to receive a second requested value of the acceleration from a second system. The processor is configured to select one of the first requested value and the second requested value as an arbitration result. The processor is configured to set a priority for selecting the first requested value lower than a priority for selecting the second requested value when the processor acquires predetermined information from one of the first system and the second system while the vehicle is stopped.