Vehicle Acceleration Control Using Map-Based Crossing Road Detection
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Solution Overview
Problem
Existing vehicle driving assist systems are inadequate in preventing abrupt acceleration due to driver missteps, especially in environments with poor obstacle detection conditions such as dense fog, rainfall, or at intersections where no obstacle is detected, and require time for users to adapt to one-pedal systems, imposing an economic burden.
Innovation Solution
A vehicle driving assist apparatus that uses map information and sensors to detect crossing roads and set a higher degree of acceleration suppression as the reaching distance to a traveling-prohibited region shortens, without relying on obstacle recognition sensors, thereby preventing abrupt acceleration by integrating navigation, camera, and sensor data to control the vehicle's acceleration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a misstep preventing apparatus is added separately to the accelerator pedal, then misstep prevention capability is improved, but device complexity and economic burden increase
Solution Approach 1:
The patent combines multiple existing sensors (accelerator position sensor, vehicle speed sensor, obstacle detection sensor) into an integrated misstep prevention system. The control unit processes signals from these sensors to detect missteps and control throttle opening, merging detection and control functions into a unified system rather than adding a separate apparatus to the accelerator pedal.
Solution Approach 2:
The control unit performs multiple functions: it controls throttle opening based on accelerator position, manages vehicle speed, detects obstacles, and prevents missteps. By making the control unit multi-functional, the patent avoids adding dedicated hardware for misstep prevention, reducing overall device complexity while maintaining reliability.
2Reliability
If the throttle opening is restricted to prevent abrupt acceleration, then safety is improved, but productivity and driving responsiveness deteriorate
Solution Approach 1:
The control unit applies different control strategies based on local driving conditions. When a misstep is detected near intersections or in areas with poor obstacle detection, the system restricts throttle opening to prevent abrupt acceleration. In normal driving conditions without misstep detection, the system maintains normal throttle response, preserving driving responsiveness and productivity.
Solution Approach 2:
The throttle control is dynamic rather than static. The control unit continuously adjusts throttle opening based on real-time sensor inputs, allowing the system to transition between normal acceleration and restricted acceleration modes. This dynamic control ensures safety when needed while maintaining driving responsiveness during normal operation.
Data Source
AI summary
A vehicle driving assist apparatus includes a first unit to set a degree of acceleration suppression to suppress acceleration of a vehicle, a controller to suppress target acceleration of the own vehicle based on the degree of acceleration suppression, a storage to store road map information, an estimator to estimate a vehicle position, a detector to map-match the estimated vehicle position to the road map information and detect whether there is a crossing road ahead of the vehicle, a second setting unit to set, when the detector detects the crossing road, a traveling-prohibited region on an opposite side of the vehicle on the road map information, and a calculator to calculate a reaching distance from the vehicle to the region. The degree of acceleration suppression is set to a higher value as the reaching distance becomes shorter.