Vehicle Control Device Accelerator Effectiveness Ratio Gradual Restoration
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Solution Overview
Problem
Existing vehicle control devices fail to prevent unexpected acceleration and inefficient energy consumption when driving force suppression is cancelled, leading to increased fuel and electric power consumption.
Innovation Solution
A control device that includes an inter-vehicle distance detector and an effectiveness ratio setting module to adjust the accelerator operation reflection based on inter-vehicle distance, gradually increasing the effectiveness ratio when the preceding vehicle is no longer present, ensuring smooth acceleration and maintaining energy efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the electronic throttle characteristic is restored to the normal characteristic soon after the preceding vehicle goes away, then the responsiveness to accelerator operation is improved, but the vehicle may accelerate more than expected and consume more fuel
Solution Approach 1:
The control device performs preliminary action by gradually restoring the effectiveness ratio before the driver operates the accelerator again. When the accelerator is not operated after the preceding vehicle departs, the effectiveness ratio is incrementally increased from the suppressed value toward 100%, preparing the system in advance so that when acceleration is needed, the restoration is already complete or near-complete, preventing unexpected acceleration while maintaining responsiveness
Solution Approach 2:
The control device applies dynamics by making the effectiveness ratio changeable over time rather than fixed. The restoration process is dynamic, with the effectiveness ratio gradually increasing from a suppressed state to full effectiveness (100%) based on whether the accelerator is being operated. This dynamic adjustment allows the system to adapt between maintaining suppression and full responsiveness based on current driving conditions
2Stability of the object's composition
If the electronic throttle characteristic is gradually restored to the normal characteristic, then the unexpected acceleration is prevented, but the energy consumption efficiency decreases
Solution Approach 1:
The control device performs preliminary action by initiating the gradual restoration of the effectiveness ratio immediately when the preceding vehicle departs and the accelerator is not operated. This preliminary restoration occurs in advance of when the driver will likely need acceleration, so that by the time acceleration is requested, the effectiveness ratio has already been restored to 100%, eliminating the need for prolonged gradual restoration that would reduce energy efficiency
Solution Approach 2:
The control device applies self-service by automatically managing the effectiveness ratio restoration without requiring driver input or intervention. The system monitors accelerator operation status and autonomously adjusts the effectiveness ratio, restoring it gradually when the accelerator is idle and maintaining full effectiveness when acceleration is needed, thereby optimizing both stability and energy efficiency without driver burden
Data Source
AI summary
A control device for a vehicle includes: an inter-vehicle distance detector that detects a presence or an absence of a preceding vehicle, and an inter-vehicle distance between the vehicle and the preceding vehicle; an effectiveness ratio setting module that sets an effectiveness ratio indicating a proportion of an accelerator operation amount of a driver to be reflected in a drive control, on the basis of the inter-vehicle distance when the inter-vehicle distance is less than a predetermined standard value; and a drive controller that performs the drive control on the vehicle on the basis of the effectiveness ratio. When the preceding vehicle goes away in a state in which the effectiveness ratio is lowered, the effectiveness ratio setting module gradually increases the effectiveness ratio for a period for which an accelerator is on.