Compressor Piston Positioning for Low-Noise Motor Restart
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Solution Overview
Problem
Existing technologies fail to address the issue of noise generation and piston positioning during engine starting failures, leading to undesirable knocking noises due to abrupt de-energization and piston collisions, without effectively optimizing piston position for a successful restart.
Innovation Solution
A method and system that utilize a failure detection logic, de-energizing logic, and piston positioning logic to progressively reduce voltage and maintain the magnetic field, allowing the piston to be positioned smoothly and reducing noise by gradually dissipating compressed gas energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electronic switches are promptly turned off when the rotor fails to reach the expected position, then the engine control is quickly reset, but the piston becomes loose and collides with the compressor kit generating knocking noise
Solution Approach 1:
The control system performs preliminary action by progressively reducing voltage to the compressor motor before complete shutdown, rather than abruptly cutting power. This gradual de-energization allows the piston to decelerate smoothly and be positioned in a favorable location before the switching operation, preventing the piston from becoming loose and colliding with the compressor kit that generates knocking noise
Solution Approach 2:
The invention changes the voltage parameter progressively from full operating voltage to zero voltage over a period of time during the shutdown sequence. This parameter change approach transforms the abrupt electrical cutoff into a controlled gradual reduction, which corresponds to the mechanical deceleration of the piston and prevents harmful collisions while maintaining engine control reliability
2Speed
If the voltage is abruptly cut off during engine failure, then the engine shuts down quickly, but the compressed gas pushes the piston back causing jolt and noise
Solution Approach 1:
The control system performs preliminary action by progressively reducing voltage to the compressor motor before complete shutdown, rather than abruptly cutting power. This gradual de-energization allows the piston to decelerate smoothly and be positioned in a favorable location before the switching operation, preventing the piston from becoming loose and colliding with the compressor kit that generates knocking noise
Solution Approach 2:
The progressive voltage reduction acts as a cushioning mechanism that gradually reduces the energy in the system before the abrupt shutdown. By reducing voltage step-by-step, the system cushions the mechanical impact that would otherwise occur when compressed gas pushes the piston back, thereby preventing jolt and noise while achieving quick shutdown
3Loss of time
If the engine shuts down immediately upon failure detection, then the response time is minimized, but the piston position cannot be optimized for a new start
Solution Approach 1:
The control system performs preliminary action by progressively reducing voltage to the compressor motor before complete shutdown, rather than abruptly cutting power. This gradual de-energization allows the piston to decelerate smoothly and be positioned in a favorable location before the switching operation, preventing the piston from becoming loose and colliding with the compressor kit that generates knocking noise
Solution Approach 2:
The invention maintains continuity of useful action by keeping the magnetic field active during the progressive voltage reduction phase, rather than immediately deactivating it. This continuous magnetic field presence allows the system to control piston movement and optimize position even as voltage is reduced, ensuring the piston is in a favorable position for restart while minimizing failure response time
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Effectively reduces noise and improves piston positioning by preventing collisions, enhancing the chances of a successful engine restart by smoothly transitioning the piston to a favorable position.
Implementation Method 1
maintain the magnetic field, allowing the piston to be positioned smoothly
Implementation Method 2
progressively reduce voltage and maintain the magnetic field, allowing the piston to be positioned smoothly
Data Source
AI summary
A method and system for reducing the noise generated during a starting failure of a compressor motor and for allowing the piston (15) to be positioned in a position more favorable for a new start, the method being executed by a failure detection logic (100), a de-energization logic (200) and a positioning logic (300) of piston (15). The failure detection logic (100) comprises the steps of: obtaining at least one current position (S0), one more favorable position (S1) and one next position (S2) of the piston (15); and comparing the next position (S2) with the most favorable position (S1). The de-energizing logic (200) comprises the step of keeping the magnetic field active. The positioning logic (300) of piston (15) comprises the step of positioning the piston (15) in a new current position (50).