Vehicle Driving Force Suppression via Shift-Position Logic
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle safety systems require additional sensors for both front and rear obstacle detection to prevent accidents from driver erroneous operations during vehicle startup, leading to potential false determinations and unnecessary engine output restriction or deceleration.
Innovation Solution
A vehicle driving force suppression device that uses either front or rear sensors, combined with shift position detection, to determine if driving force suppression is needed, adjusting engine output or brake pressure to prevent accidents without adding new sensors, by integrating an object detection unit, shift position detection unit, and driving force suppression unit via a central control device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sensors for detecting obstacles are installed at both front and rear of the vehicle to support both forward and backward start, then the safety against driver's erroneous operations is improved, but the device complexity and cost increase
Solution Approach 1:
The patent makes the existing object detection unit perform multiple functions by combining it with shift position detection. The same sensor that detects obstacles is used to determine both the presence of obstacles and, when combined with transmission position information, to identify erroneous start operations in both forward and reverse directions. This eliminates the need for separate sensor systems for different driving directions.
Solution Approach 2:
The patent merges the function of obstacle detection with erroneous start detection by integrating shift position detection results with object detection results. The control device combines information from the object detection unit and transmission position detection to determine whether a detected object represents a real obstacle or indicates an erroneous start operation, thereby using existing sensors more efficiently.
2Measurement precision
If erroneous operation is determined based on a profile uniquely predetermined on the basis of relative speed and distance from obstacle, then the measurement precision is improved, but false determination occurs and unnecessary engine output restriction increases
Solution Approach 1:
The patent dynamically adjusts the determination criteria for erroneous operations based on the transmission position. Instead of using a fixed profile for all situations, the control device modifies the determination logic according to whether the vehicle is in forward or reverse gear, allowing flexible adaptation to different driving contexts and reducing false determinations.
Solution Approach 2:
The system uses feedback from the transmission position detection to refine the erroneous operation determination. The control device continuously monitors both object detection results and transmission position, using this feedback loop to distinguish between actual obstacles and erroneous start attempts, thereby reducing false positives while maintaining detection precision.
Data Source
AI summary
A vehicle driving force suppression device is provided, and driving force suppression is conducted on the basis of existence of an obstacle which is on the opposite course to the selected shift position. Adding specific conditions related to acceleration pedal depression amount and speed, inclination of the road in the direction which an obstacle exists, or distance to the obstacle, magnitude of driving force suppression is decided.