Dog Clutch Phase Correction for Faster Engagement Timing
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Solution Overview
Problem
Existing dog clutch systems experience low responsiveness due to the need to wait for rotational speed and phase differences to align before engagement, leading to delayed engagement and reduced efficiency.
Innovation Solution
A dog clutch control system that includes a rotational speed detecting unit, arrival timing predicting unit, and phase correcting unit to adjust the phase of the engagement members before the rotational speed difference reaches a predetermined threshold, allowing for earlier engagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the system waits for rotational speed difference to reach a predetermined threshold before engagement, then engagement reliability is improved, but engagement responsiveness deteriorates
Solution Approach 1:
The system performs preliminary phase alignment of the engagement members before the rotational speed difference reaches the predetermined threshold. The phase correcting unit adjusts the phase of at least one engagement member in advance, so that when the speed threshold is reached, the members are already positioned for immediate engagement, eliminating the waiting time while maintaining reliable engagement conditions
2Loss of time
If the system performs phase correction before arrival timing, then engagement timing is optimized, but control complexity increases
Solution Approach 1:
The system uses feedback from the rotational speed detecting unit and arrival timing predicting unit to dynamically adjust the phase correction amount. The phase correcting unit receives real-time information about the rotational speeds and predicted arrival timing, and automatically calculates the necessary phase adjustment, simplifying the control process while achieving optimal engagement timing
Data Source
AI summary
A dog clutch control system includes a dog clutch including a first engagement member and a second engagement member, an actuator, a rotational speed detecting unit, an arrival timing predicting unit, and a phase correcting unit. The arrival timing predicting unit predicts an arrival timing at which a rotational speed difference between the first engagement member and the second engagement member is adjusted to a value equal to or less than a predetermined threshold, based on the rotational speeds of the first and second engagement member and a time variation characteristic of the rotational speed difference during a rotational speed adjustment. The phase correcting unit performs a phase correction to bring an engageable timing, which is a timing at which the first engagement member is engageable with the second engagement member after the arrival timing, closer to the arrival timing compared to a case without the phase correction.