Vehicle Braking Control During Accelerator Input in MT Driving
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Solution Overview
Problem
In vehicles with manual transmissions, unintended accelerator operations during braking requests from driver assistance systems can lead to a loss of braking force due to the rejection of braking requests, particularly in scenarios like double depression states.
Innovation Solution
A control device and method that releases or maintains braking force based on conditions such as clutch operation or shift lever position, preventing unintended loss of braking force by rejecting or maintaining braking requests.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the braking request is rejected when the accelerator pedal is operated during braking control, then the driver's acceleration request is responded to, but the braking force is unintentionally lost in MT vehicle operations
Solution Approach 1:
The control device applies different quality judgments to different accelerator operations: it distinguishes between intentional acceleration requests and unintentional operations (blipping, double clutching) by evaluating the operational context and vehicle state, thereby maintaining braking force only when the operation is unintentional
Solution Approach 2:
The system dynamically adjusts the braking control maintenance decision based on real-time evaluation of the accelerator operation characteristics and vehicle state, transitioning between releasing and maintaining braking force according to the specific operational context
2Reliability
If the braking request is maintained during accelerator operation, then the braking force is preserved, but the driver's intentional acceleration request cannot be fulfilled
Solution Approach 1:
The control device uses feedback from the operational context evaluation (clutch state, shift lever position, operation duration) to determine whether to maintain or release braking force, creating a closed-loop control system that adapts to driver intent
Solution Approach 2:
The system performs preliminary evaluation of the accelerator operation characteristics before making the braking control decision, assessing whether the operation is intentional or unintentional based on pre-defined criteria such as operation duration and vehicle state
3Reliability
If the system distinguishes between intentional and unintentional accelerator operations, then the braking force can be maintained appropriately, but the control complexity increases
Solution Approach 1:
The control device uses parameter changes in the operational context (clutch engagement state, shift lever position, operation duration) to simplify the decision-making process, transforming a complex intent recognition problem into a set of measurable parameter evaluations
Data Source
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AI summary
A control device configured to control motion of a vehicle (1) includes a controller. The controller is configured to execute braking control that generates a braking force for decelerating the vehicle (1) in response to a braking request. The controller is configured to release the braking force by the braking control when a predetermined condition for continuing the braking control is not satisfied, and to maintain the braking force by the braking control when the predetermined condition is satisfied, in a case where an accelerator pedal is operated during execution of the braking control.