Manual-Transmission Collision Avoidance During Engine Stall
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Solution Overview
Problem
In vehicles equipped with manual transmissions, engine stalls can occur frequently during contact avoidance control, making it difficult to achieve appropriate contact avoidance control when driver assistance control is canceled.
Innovation Solution
A driver assistance apparatus for vehicles with manual transmissions, incorporating a recognizer to identify the traveling environment, a processor to execute driver assistance control including contact avoidance, a determiner to assess engine stalls, and a standby unit to temporarily hold cancellation requests until the vehicle stops.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If driver assistance control is canceled when engine stall occurs, then system reliability is improved by avoiding malfunction-based cancellation, but contact avoidance control cannot be maintained during engine stall in manual transmission vehicles
Solution Approach 1:
The system dynamically adjusts the cancellation determination based on vehicle stop status. When engine stall occurs during contact avoidance control, the standby unit temporarily suspends the cancellation request until the vehicle stops, allowing contact avoidance control to continue during the deceleration phase while maintaining reliability by eventually canceling when the vehicle is stationary.
Solution Approach 2:
The system changes the parameter for cancellation determination from a static engine stall detection to a dynamic condition that considers both engine stall and vehicle stop status. The standby unit introduces a time-based parameter, temporarily holding the cancellation request for a predetermined period after engine stall detection to allow contact avoidance control to continue during active deceleration.
2Ease of operation
If driver assistance control is canceled upon engine stall detection, then false cancellation due to normal engine stalling is prevented, but contact avoidance control is unnecessarily interrupted during manual transmission operation
Solution Approach 1:
The system segments the cancellation determination into two distinct phases: during vehicle motion (contact avoidance control continues) and during vehicle stop (cancellation is executed). The standby unit creates this temporal segmentation by temporarily suspending cancellation requests during the deceleration phase and only executing cancellation after the vehicle comes to a complete stop, thereby distinguishing between normal engine stalling during operation and actual malfunctions.
Solution Approach 2:
The standby unit acts as an intermediary between engine stall detection and cancellation execution. It introduces a buffering mechanism that delays the cancellation decision until the vehicle stops, allowing the system to differentiate between intentional engine stalling during contact avoidance control and actual engine malfunctions that would require cancellation.
3Speed
If cancellation request is executed immediately upon engine stall, then system response time is improved, but contact avoidance control is interrupted before vehicle stops causing potential safety issues
Solution Approach 1:
The standby unit performs a preliminary action by temporarily suspending the cancellation request upon engine stall detection, allowing contact avoidance control to continue executing during the deceleration phase. This preliminary suspension prevents premature cancellation before the vehicle has sufficiently decelerated, ensuring safe completion of the avoidance maneuver while still preparing for eventual cancellation after the vehicle stops.
Data Source
AI summary
A driver assistance apparatus for a vehicle equipped with a manual transmission as a transmission includes a recognizer, a first processor, a first determiner, a second determiner, and a standby unit. The recognizer recognizes information on a traveling environment outside the vehicle. The first processor executes driver assistance control, based on the traveling environment information. The driver assistance control includes contact avoidance control against an obstacle. The first determiner determines whether an engine stall has occurred in an engine of the vehicle. The second determiner makes a request for cancellation of the driver assistance control when the engine stall has occurred. The standby unit temporarily puts, when the engine stall has occurred during the execution of the contact avoidance control, the request for cancellation of the driver assistance control on standby from occurrence of the engine stall until the vehicle stops.