Actuator Control for Eliminating Tooth-on-Tooth Positions
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Solution Overview
Problem
Existing methods for eliminating tooth-on-tooth positions in automated manual transmissions using interlocking shifting elements face challenges in balancing speed and comfort, as they often require conflicting criteria such as quick elimination with minimal disruption to the drive-train, and previous methods lack an efficient adaptive approach for target parameter adjustment.
Innovation Solution
A method where the actuator is operated with a defined target parameter in the first attempt, and if the tooth-on-tooth position is not eliminated, the target parameter is increased in subsequent attempts until successful, with the parameter being adapted for subsequent tooth-on-tooth positions to ensure quick and comfortable elimination, and stored values help limit the adaptation for optimal compromise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the actuator is operated with increased target parameter in subsequent operating attempts to eliminate tooth-on-tooth position, then the elimination speed is improved, but the drive-train is affected by more knocks and comfort deteriorates
Solution Approach 1:
The control device dynamically adapts the target parameter for subsequent tooth-on-tooth positions based on the number of operating attempts required for previous positions. This creates a dynamic control strategy where the actuator operation is adjusted in real-time based on learned experience from previous elimination attempts, resolving the contradiction between speed and comfort by optimizing the parameter adaptively rather than using fixed aggressive values
Solution Approach 2:
The control device uses feedback from the actual elimination process (number of attempts m required to eliminate each tooth-on-tooth position) to adapt future target parameters. The feedback mechanism allows the system to learn from previous operations and adjust subsequent operations to achieve faster elimination with fewer knocks, directly addressing the contradiction between elimination speed and drive-train comfort
2Reliability
If the target parameter is increased in subsequent operating attempts to eliminate existing tooth-on-tooth position, then the elimination is achieved more reliably, but the complexity of control increases
Solution Approach 1:
The control device serves itself by automatically adapting target parameters based on feedback from previous elimination attempts. The system performs self-adjustment without external intervention, using the elimination history to automatically optimize future operations. This self-service approach maintains reliability while keeping control complexity manageable through automated adaptation rather than complex manual control strategies
Solution Approach 2:
The control device changes the target parameter based on the number of operating attempts required for previous tooth-on-tooth positions. By systematically adjusting the parameter (increasing it for positions requiring more attempts), the system ensures reliable elimination while maintaining a structured, predictable control logic that doesn't excessively increase complexity
Data Source
AI summary
A method of eliminating a tooth-on-tooth position at an interlocking shifting element. The tooth-on-tooth position is eliminated by operating at least one actuator such that, during a first operating attempt the actuator is operated using a defined target parameter, after which it is checked whether as a result of the operation of the actuator the tooth-on-tooth position has been eliminated. If the tooth-on-tooth position is not eliminated, then repeating subsequent operating attempts of operation of the actuator, each time with an increased target parameter, until, after the corresponding operation of the actuator, the tooth-on-tooth position is eliminated by the m-th operating attempt. For elimination of a subsequent tooth-on-tooth position, the target parameter defined for the first elimination attempt is adapted such that the subsequent tooth-on-tooth position is eliminated by an n-th attempt.