Vehicle Drive Control Neutral Torque Zeroing
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Solution Overview
Problem
Conventional vehicle drive control devices are ineffective in automatically freeing a stuck vehicle, as they cancel automatic drive control when the gear lever is shifted to neutral, leading to sudden acceleration and load on the transmission apparatus when driving torque is applied.
Innovation Solution
A vehicle drive control device that maintains automatic drive control by setting driving torque to zero when the gear lever is in neutral, allowing continuous operation and preventing sudden acceleration, with the ability to shift to forward or rearward movement positions without canceling automatic control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the automatic drive control is canceled when the gear lever is shifted to neutral position, then the driver can manually operate the vehicle, but the vehicle cannot be automatically freed from stuck situation and sudden acceleration may occur
Solution Approach 1:
The system dynamically adjusts the drive torque based on the gear lever position. When the gear lever is at neutral, the drive torque is set to zero. When shifted to forward or rearward positions, the automatic drive control is restored and drive torque is reapplied. This dynamic adjustment allows the system to maintain automatic control continuity while preventing sudden acceleration during neutral positioning.
Solution Approach 2:
The drive torque parameter is changed based on gear lever position. The control device sets the drive torque to zero when neutral position is detected, and restores normal torque control when forward or rearward movement positions are detected. This parameter change enables the system to prevent sudden acceleration while maintaining automatic drive control functionality.
2Productivity
If the driving torque is applied when the gear lever is at neutral position, then the automatic drive control continues to operate, but sudden acceleration and load on transmission apparatus occur
Solution Approach 1:
The control device preemptively sets the drive torque to zero when the gear lever is detected at neutral position, preventing the harmful effect of sudden acceleration before it can occur. This preliminary anti-action eliminates the risk of transmission load while maintaining the system's ability to provide automatic drive control when needed.
Data Source
AI summary
A vehicle device control device includes an automatic drive control device for executing an automatic drive control by controlling at least a driving torque generating device, which applies a driving torque on a vehicle, so that a vehicle speed reaches a preset target vehicle speed, and a shift position determination portion for determining a shift position of a gear lever of the vehicle, wherein in a case where the shift position determination portion determines that the gear lever is set at a neutral position on the basis of a determination result of the shift position determination portion while the automatic drive control is executed, the automatic drive control device controls the driving torque generating device so that the driving torque applied to the vehicle becomes zero while continuously executing the automatic drive control.