Dynamic Erroneous Start Limitation for Automatic Vehicle Stop Control
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Solution Overview
Problem
Existing vehicle travel control systems cannot effectively combine automatic travel control and erroneous start prevention control, leading to interference and failure to follow the driver's acceleration intent.
Innovation Solution
A vehicle travel control apparatus that includes a detection part for monitoring the accelerator pedal operation, an automatic travel control part for independent vehicle stopping, and an erroneous start limitation control part that adjusts the drive amount limitation based on the detected operation state, decreasing the limitation when the vehicle is automatically stopped compared to when stopped by the driver, and moderates or releases braking force according to driver input.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If erroneous start limitation control is applied to prevent vehicle erroneous start, then vehicle safety is improved, but the automatic travel control cannot follow the driver's acceleration intent when the driver operates the accelerator pedal after automatic stopping
Solution Approach 1:
The threshold value for erroneous start limitation control is made dynamic based on the stopping state. When the vehicle is automatically stopped, a higher threshold is applied, allowing larger accelerator pedal operations without triggering limitation. When the vehicle is stopped by driver operation, a lower threshold applies. This dynamic adjustment resolves the contradiction by adapting the safety control level to the specific stopping context.
Solution Approach 2:
The control threshold parameter is changed according to the stopping condition. The erroneous start limitation control uses different threshold values depending on whether the vehicle stopped automatically or through driver operation. This parameter change allows the system to maintain safety while accommodating driver intent in automatic stopping scenarios.
2Extent of automation
If automatic travel control stops the vehicle independently, then automation level is improved, but conflict with erroneous start prevention control occurs when driver operates accelerator pedal
Solution Approach 1:
The system uses feedback from the stopping state detection to adjust the erroneous start limitation control. The automatic travel control part provides feedback about the automatic stopping condition to the erroneous start limitation control part, which then adjusts its threshold accordingly. This feedback mechanism enables coordinated operation of the two control systems.
Solution Approach 2:
The stopping state information acts as an intermediary between the automatic travel control part and the erroneous start limitation control part. This intermediary information allows the two control systems to communicate and coordinate their actions without direct interference, resolving the conflict between automation and safety control.
3Reliability
If drive amount is limited when vehicle is started from stopped state, then erroneous start prevention is improved, but acceleration performance is degraded when driver intends to accelerate after automatic stop
Solution Approach 1:
The drive amount limitation is made dynamic based on the stopping context. When the vehicle is automatically stopped, the limitation is reduced or released, allowing full acceleration performance. When the vehicle is stopped by driver operation, the limitation remains active. This dynamic adjustment resolves the contradiction between safety and performance.
Solution Approach 2:
The drive amount limitation parameter is changed according to the stopping condition. The system adjusts the limitation level based on whether the stop was automatic or driver-initiated, allowing optimal balance between erroneous start prevention and acceleration performance for each scenario.
Data Source
AI summary
A vehicle travel control apparatus includes: a detection part that detects an operation state of an accelerator pedal by a driver; an automatic travel control part that performs an automatic travel control in which a vehicle is automatically stopped according to a predetermined condition and independent of the operation of the driver; and an erroneous start limitation control part that limits a drive amount when the vehicle is started according to the operation state of the accelerator pedal detected by the detection part, wherein the erroneous start limitation control part decreases the degree of limitation of the drive amount when the vehicle is started in a case where the vehicle is automatically stopped according to the automatic travel control compared to a case where the vehicle is stopped according to the operation of the driver.