Driving Force Control Apparatus for Reverse Safety
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Solution Overview
Problem
Conventional driving force control apparatuses may degrade vehicle traveling performance and safety at reverse timing due to excessive restraint of driving force when a vehicle is stuck in muddy or snowy conditions, leading to rapid acceleration or starting issues.
Innovation Solution
A driving force control apparatus that dynamically adjusts the shift-change-timing and reverse-timing restrain controls based on specific driver operations, such as invalidating traction control or shifting into low gear, to moderate or eliminate driving force limitations, ensuring sufficient driving force while maintaining safety at reverse timing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If driving force restrain control is applied to prevent rapid acceleration or starting, then vehicle safety is improved, but vehicle traveling performance is degraded
Solution Approach 1:
The patent applies dynamics by making the driving force restraint control adaptable and changeable based on detected driver operations. The control system dynamically adjusts between different restraint levels (first restraint control and second restraint control) depending on whether specific operations are detected, allowing the system to optimize between safety and performance based on real-time conditions rather than using a fixed restraint level
Solution Approach 2:
The patent changes the control parameters of the driving force restraint system based on detected operations. When specific operations are detected, the system switches from the first restraint control (with higher limitation) to the second restraint control (with lower or no limitation), effectively changing the driving force parameters to resolve the contradiction between safety and traveling performance
2Reliability
If shift-change-timing restrain control and reverse-timing restrain control are both applied, then rapid acceleration prevention is improved, but driving force sufficiency is degraded
Solution Approach 1:
The system dynamically adjusts the level of restraint control applied based on detected driver operations. When operations indicating escape intent are detected, the system switches to a restraint control mode with lower limitation, ensuring sufficient driving force is available for the driver's intended purpose while maintaining safety when such operations are not detected
Data Source
AI summary
A controller of a driving force control apparatus starts shift-change-timing restrain control to limit operation driving force at a timing when a starting condition including a condition that a shift position has changed when an accelerator pedal is in an operating state becomes satisfied, and performs reverse-timing restrain control to limit the operation driving force when a performing condition including a condition that the accelerator pedal is in the operating state as well as the shift position is in a reverse position is satisfied. When a specific operation is performed during the shift-change-timing restrain control being performed, the controller moderates a degree of the limitation to the operation driving force in the shift-change-timing restrain control or stops this control. When the specific operation is performed during the reverse-timing restrain control being performed, the controller maintains a degree of the limitation to the operation driving force in the reverse-timing restrain control.