Synchronous Control Device Variable Cam Timing
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Solution Overview
Problem
Existing synchronous control technologies face challenges in synchronizing the operation of slave shafts with master shafts, particularly in adjusting to varying operational speeds and external/internal signal changes, leading to inefficiencies and prolonged setup times.
Innovation Solution
A synchronous control device that calculates change amount information based on the master shaft's angle or time, allowing for flexible execution of operation instructions synchronized with these changes, including a change amount information calculator, operation instruction execution controller, and executor, to determine the start and completion of operations based on predefined conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional electronic cam control is used with fixed positional relationship between master shaft and slave shaft, then the control system is simple to implement, but it cannot synchronize with variable timing of operation instructions and external signals
Solution Approach 1:
The patent applies dynamics by making the cam operation start timing variable rather than fixed. The operation instruction execution controller dynamically determines start timing based on change amount information and signal conditions, allowing the system to adapt to variable operational requirements while maintaining a relatively simple control structure.
Solution Approach 2:
The patent changes the parameter of cam operation start timing from a fixed value to a variable determined by change amount information. This allows the system to synchronize with variable timing requirements of operation instructions and external signals, improving adaptability without requiring complete system redesign.
2Reliability
If shift amount is added to reference shaft to execute cam control, then synchronization with auxiliary machine operation can be achieved, but it becomes difficult to grasp entire operation and each shift amount during programming and operation monitoring
Solution Approach 1:
The patent introduces change amount information as an intermediary that mediates between the reference shaft and cam operation start timing. Instead of directly adding shift amounts to the reference shaft, the system uses change amount information to determine start timing, making the operation more transparent and easier to monitor while maintaining synchronization accuracy.
Solution Approach 2:
The patent implements feedback by using signal conditions and change amount information to determine cam operation start timing. The system continuously monitors the state of auxiliary machines and external signals, and adjusts the start timing accordingly, providing clear feedback mechanisms for programming and operation monitoring.
3Adaptability or versatility
If multiple cam operations with different shift amounts are executed simultaneously, then comprehensive synchronization can be achieved, but adjustment time increases due to difficulty in grasping entire operation
Solution Approach 1:
The patent applies universality by creating a unified control mechanism that handles multiple cam operations with different timing requirements through a common framework. The operation instruction execution controller uses the same change amount information and signal condition evaluation method for all cam operations, enabling multi-operation synchronization while simplifying the adjustment process.
Data Source
AI summary
When change amount information calculated by a change amount information calculating unit satisfies a start condition and a signal condition is true for an operation instruction the start condition and the signal condition of which are defined, an operation instruction execution control unit determines a start of the corresponding operation instruction and determines operation completion based on a completion condition determined in advance of the operation instruction. An operation instruction executing unit executes the operation instruction the start of which is determined by the operation instruction execution control unit and stops the operation instruction when the operation completion is determined by the operation instruction execution control unit.