Driver Posture Sensing for Straight-Running Acceleration Control
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Solution Overview
Problem
It is challenging to recognize a driver's intention for acceleration or deceleration during straight-ahead running in saddle-type vehicles, which hinders the improvement of driving feeling and reaction speed.
Innovation Solution
A driving-assistance control apparatus that includes a straight-running determination unit, a head-position detection unit, a driving-posture determination unit, and a driving-assistance control unit. This apparatus determines if the vehicle is running straight and, based on the driver's head position and posture, performs acceleration or deceleration preparation control to enhance reaction speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the vehicle waits for sensor detection and standard control processing, then control accuracy is maintained, but the reaction speed to driver's operation becomes slow
Solution Approach 1:
The control apparatus performs preliminary actions by detecting the driver's operation intention in advance (through accelerator position change, brake operation, or clutch operation) and executing control signals before the vehicle's operating state actually changes. This anticipatory control reduces the perceived response delay by several hundreds milliseconds, making the vehicle reaction feel instantaneous to the driver.
2Measurement precision
If the control apparatus uses gravity center shift detection for turning recognition, then turning performance is improved, but the ability to recognize acceleration/deceleration intention during straight running is insufficient
Solution Approach 1:
The control apparatus employs a universal detection method that monitors multiple driver operations (accelerator position sensor, brake operation sensor, clutch operation sensor) to recognize driver intention across different vehicle operations including straight running acceleration, deceleration, and turning. This multi-functional approach enables accurate intention recognition regardless of the specific operation type, overcoming the limitation of gravity center shift detection which is only effective for turning.
Data Source
AI summary
The objective is to improve driving feeling at a time of acceleration operation or deceleration operation, by recognizing driver's intention of acceleration or deceleration during straight-ahead running. A driving-assistance control apparatus according to the present disclosure includesa straight-running determination unit that determines whether or not a vehicle is running straight,a head-position detection unit that detects a head position of a driver,a driving-posture determination unit that determines the posture of the driver, based on the head position detected by the head-position detection unit, anda driving-assistance control unit that performs acceleration preparation control for raising a reaction speed for acceleration operation or deceleration preparation control for raising a reaction speed for deceleration operation in accordance with an output of the driving-posture determination unit, when the straight-running determination unit determines that a vehicle is running straight.