Driving Assist Device Time-Based Cancellation Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing driving assist devices struggle to properly transition from automated driving to manual driving, as automated driving may not be easily canceled, especially when the driver is not ready or has made an erroneous request, leading to potential safety issues.
Innovation Solution
A driving assist device that changes the manner of canceling automated driving based on elapsed time from the start of automated driving, making it easier to cancel before a predetermined time and more difficult after, and adjusts cancellation requirements based on the vehicle's driving state, ensuring safe and convenient transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If automated driving control is implemented with strict cancellation requirements to ensure safety, then reliability is improved, but ease of operation deteriorates
Solution Approach 1:
The patent applies dynamics by making the cancellation requirements changeable based on elapsed time. The control device transitions from a first cancellation requirement (easier to fulfill) before a predetermined time elapses to a second cancellation requirement (more difficult to fulfill) after the time elapses. This dynamic adjustment resolves the contradiction by adapting the ease of operation to the specific phase of automated driving, ensuring safety while allowing flexibility when appropriate.
Solution Approach 2:
The patent changes the parameter of cancellation requirements based on elapsed time. By switching between different cancellation requirements (first vs. second) depending on whether a predetermined time has elapsed, the system adjusts the operational parameters to balance safety and ease of use. This parameter change allows the system to be more lenient initially and more stringent later, resolving the contradiction between reliability and ease of operation.
2Reliability
If automated driving is made difficult to cancel to prevent erroneous requests, then reliability is improved, but ease of operation deteriorates
Solution Approach 1:
The system dynamically adjusts cancellation difficulty based on elapsed time. Before the predetermined time elapses, the first cancellation requirement allows easier cancellation, making the system responsive to driver intent. After the time elapses, the second cancellation requirement makes cancellation more difficult, preventing erroneous requests. This dynamic behavior resolves the contradiction by being responsive when needed and protective when appropriate.
Solution Approach 2:
The system performs a preliminary assessment period (the predetermined time) during which cancellation is easier. This preliminary phase allows the driver to correct erroneous requests easily, while the subsequent phase with stricter requirements prevents accidental cancellations after the driver has had sufficient opportunity to react. This preliminary action resolves the contradiction between responsiveness and error prevention.
Data Source
AI summary
A driving assist device includes a first control portion that controls a vehicle to carry out automated driving, and a second control portion that controls the vehicle to make a shift to manual driving, in which the vehicle travels on a basis of an driving operation by a driver, when canceling the automated driving, and changes a manner of canceling the automated driving in accordance with an elapsed time from a start of the automated driving.